WO2019072569A1

WO2019072569A1 - Method, mobile terminal, and measuring system for measuring electrical properties of an earthing installation

Info

Publication number: WO2019072569A1
Application number: PCT/EP2018/076159
Authority: WO
Inventors: Moritz PIKISCH
Original assignee: Omicron Electronics Gmbh
Priority date: 2017-10-11
Filing date: 2018-09-26
Publication date: 2019-04-18
Also published as: EP3695236A1

Abstract

The invention relates to a method and a system for measuring electrical properties in an earthing installation. In said method, at least one position in the surroundings of the earthing installation, at which position an earthing probe is electrically connected to an earth on which the earthing installation is installed, is determined by means of a mobile terminal of the system. Furthermore, the electrical properties between the earthing probe and either an earthing connection of the earthing installation or a contact point of the earth or of an object are measured in a predefined region of the at least one position. Moreover, the at least one position and the measured electrical properties for this position are stored by means of the mobile terminal.

Description

METHOD, MOBILE TERMINAL AND MEASURING SYSTEM FOR MEASURING ELECTRICAL PROPERTIES OF A GROUNDING PLANT

FIELD OF THE INVENTION

The invention is in the field of power engineering and relates in particular to methods and devices as well as measuring systems for measuring electrical properties in a grounding system. BACKGROUND

Earthing systems are used for earthing, i. for the discharge of electrical currents into the soil. For this purpose, such a grounding system is connected to a ground, in which electrical currents are to be derived. In this case, a better electrical connection to the ground can increase the function of dissipating electrical currents, or, conversely, a poor or even missing electrical connection can disturb this function. Grounding systems can usually be used in electrical installations, in particular high-voltage installations, and / or in high-voltage networks in order to ground them. In this way, interference currents, such as due to lightning strikes or in case of failure of the electrical system or the high-voltage network, can be derived in the soil.

In order to be able to ensure the proper and / or safe functioning of such a grounding system, it may be necessary, in particular, to measure the electrical properties of a grounding system and, in particular, of this grounding system. It may also be necessary to measure the electrical properties of other electrical installations, in particular high-voltage installations, in the vicinity of the grounding system and / or the electrical properties of the ground. Usually, for this purpose, a so-called potential funnel and / or step voltages and / or contact voltages are measured in the grounding system. So In particular, in the case of a single-pole fault, dangerous stepping and touching voltages can occur inside and outside an electrical system. By measuring the electrical properties of a grounding system, the effectiveness of the grounding system can be determined, in particular as part of a grounding test to be checked and thus in particular to ensure the safety of persons inside and outside the plant and / or a power accident to a person located there avoid.

The potential funnel describes the course of the electrical potential in the grounding system, in particular depending on the distance from the grounding system and / or the direction relative to the grounding system, when an electrical current is dissipated by means of the grounding system into the ground. Usually, the electrical potential directly at the earthing system - as an absolute value - the largest and decreases with increasing distance, so that in graphical representation, the shape of an - possibly upside down - funnel results.

The step voltage describes the electrical voltage between two points of a soil - ie in particular the surface of the soil. Such a step voltage can occur, in particular, when an electrical current is conducted into the ground by means of a grounding system. In particular, to ensure the safety of a person who is in the vicinity of the grounding system, the tension that exists between the two feet of the person, especially if this makes a step, causing the feet two about 1 m apart points on the ground usually not exceeding a certain limit.

The touch voltage describes the electrical voltage which is applied between a contact point of the ground and a point of contact of an object, in particular a part of an electrical system - such as the earthing system. Again, this should usually not exceed certain limits. In particular, the Limit values for the voltages depend on the duration of the fault 500 volts and / or at DC voltage 120 volts and / or at AC voltage 50 volts.

Usually, the measurement of the potential funnel in grounding systems, in particular for high-voltage installations and / or high-voltage networks, is carried out in accordance with the standards EN 50522 or IEEE 81.

In particular for measuring the potential funnel, the electrical voltage between the grounding system and a grounding probe is measured at different distances from the grounding system. Usually, a first person positions the grounding probe at various positions in an environment of the grounding system, in particular with increasing distances from the grounding system and / or in different directions to the grounding system, thereby establishing an electrical connection between the grounding probe and the ground at the respective position while a second person in the grounding system respectively the electrical properties between the grounding probe and the grounding system, in particular the respective electrical potential, by means of a measuring device which is in particular electrically connected to a ground terminal of the grounding system and the grounding probe and at and / or in the grounding system is arranged, measures. The distance between the grounding probe and the earthing system can be determined by the number of steps from the earthing system to the earthing probe or by means of a measuring wheel. If the potential funnel is also to be determined depending on the direction, the different directions can be determined on the basis of the directions of the compass. Usually, the respective distance and / or the respective direction as well as the respective measured value-in particular the electrical potential-are manually logged by the second person who performs the measurements.

Accordingly, the step and touch voltages are usually determined in accordance with EN 50522 and IEEE 80 or IEEE 81 standards. In particular for measuring the step voltage, a measuring device with two points on the ground can each be electrically connected and the electrical potential between the two points - ie the two points of contact with the ground to which the measuring device is electrically connected - measured, the measured values and the respective positions be manually logged.

In particular for measuring the contact voltage, a measuring device can in each case be electrically connected with a contact point of the ground and a contact point of an object which is in the vicinity of the ground, in particular above the ground, the electric potential between the object - in particular a contact point could touch a person who is standing on the ground - and the touch point of the ground, whereby the measured values, the respective position and optionally the respectively measured object and / or the respective contact point of the object are manually logged.

SUMMARY OF THE INVENTION

The invention has for its object to improve the measurement of electrical properties in a grounding system, in particular for the determination of a potential funnel as well as of step and contact voltages in a grounding system, and in particular to make the performance of such a measurement more efficient.

The invention solves this problem by a method according to the teaching of claim 1, by a computer program product according to the teaching of claim 14, by a mobile terminal according to the teaching of claim 15, by a mobile terminal according to the teaching of claim 17, by a Measuring system according to the teaching of claim 18 and by a ground probe according to the teaching of claim 19. Advantageous embodiments, further developments and variants of the present invention are in particular subject of the dependent claims. A first aspect of the invention relates to a method of measuring electrical characteristics in a grounding system connected to a ground. The method has the following. In the method, at least one position in an environment of the grounding system is determined by means of a mobile terminal to which a grounding probe is electrically connected to the ground. In addition, in the method, the electrical properties between the grounding probe and a grounding terminal of the grounding system or a contact point of the ground or of an object are measured in a predetermined range of the at least one position. In addition, the at least one position as well as the measured electrical properties for this position are stored by means of the mobile terminal.

For the purposes of the invention, a "grounding system" is to be understood as meaning at least one electrical installation which is intended to divert an electric current into the ground, for this purpose the grounding system is connected to a ground which forms part of the ground In particular, in order to check the proper functioning of such a grounding system, the electrical properties of the grounding system - such as the electrical properties of the ground and / or the electrical connection of the grounding system with the ground - to be measured.

For the purposes of the invention, a "grounding probe" is understood to be at least one mobile device which is positioned at, in particular or partially in, a ground and at a spatial position of the ground with the latter Such a grounding probe may in particular be formed as a post which is plugged into the ground at the position and has an electrical conductor which thereby electrically connects to the ground at this position, and such a grounding probe may also be a metal plate , which can be laid on the ground and so makes the electrical connection, be formed or have such a metal plate.

For the purposes of the invention, a "mobile terminal" is to be understood as at least one data processing device which, in particular due to its shape, size and / or weight, is designed to be carried by a user such that the user can use the mobile terminal while carrying it or holding it, especially in his hand.Usually such mobile terminals have a screen, which can be particularly sensitive to touch in order to allow inputs as well as an output Also, a mobile terminal may have one or more communication devices for sending or receiving data, In particular, such a mobile terminal may be a mobile phone, a laptop, a tablet computer or a smart watch.

For the purposes of the invention, a "data processing device" is understood to mean at least one device which is set up to process data, ie in particular to receive data, to store received data, to read out stored data, to receive and / or stored or read out data by means of Preferably, such a data processing device is programmable, ie, in particular that the methods for processing the data are at least partially determined by a program code and this program code In particular, a computer program product may include or provide such program code as computer readable applications.

According to the invention, a communication device is set up for the transmission and / or reception of data, in particular for the data exchange via a data connection provided by the communication device. The data connection can be established via a limited (in particular an intranet) or a worldwide network of computers (in particular a WAN and / or the Internet). The data connection can also be established via a wireless connection, in particular a radio connection, in particular a mobile radio connection. Alternatively or additionally, the data connection can also be wired-that is, in particular-wired. In some variants, an electrical connection for transmitting the data by means of electrical currents or voltages, which flow through an electrical conductor, can be established via a wired connection. Alternatively or additionally, in some variants, the data can be transmitted through the wired connection via other signals, in particular optically, for which the wired connection can in particular have a light guide. Advantageously, different devices which are data-connected via such a non-electrical data connection can thus be electrically insulated from one another. An advantage of determining the at least one position by means of the mobile terminal may be, in particular, that the position determination relative to other possibilities for determining the position or for determining the distance to the grounding system - for example by means of a measuring wheel - simpler, more reliable, faster and / or perform more accurate , Also, it is possible to reduce the labor input or workload, since the mobile terminal reduces the position determination and in this way the steps to be performed by a person and / or simplified, thereby reducing human error and / or the requirements for such a person, especially as a user of the mobile terminal, may be less. By storing the at least one position and the measured electrical property by means of the mobile terminal, it is advantageously possible to increase the reliability of the measurement of electrical properties in a grounding system and / or errors, for example when logging the respective position and / or the respective measured one electrical properties, avoid. Advantageously, it is also possible to determine the at least one position and to store the at least one position and the position measured there combine electrical properties, thereby enabling further simplification and in particular reduction of required operations, so that the working efficiency and / or reliability can be increased. In some embodiments, the measurement of electrical characteristics may be by means of a meter separate from the mobile terminal. In this advantageous manner, the separate measuring device can be arranged in a different position than the mobile terminal, such as in or at the grounding system, which makes measuring the electrical properties more flexible, increases the functionality in measuring and / or security for a person, which performs the measurement, can increase.

Advantageously, in some developments, the measuring device can be electrically insulated from the mobile terminal, which increases the reliability and / or reduce the electrical requirements for the mobile terminal - such as the requirements for its electrical safety - and thus simplify the design effort. Nevertheless, a communication connection (wireless or wired) may exist between the measuring device and the mobile terminal, so that the mobile terminal can record the measurement results on the one hand via this communication connection and, on the other hand, can control the measuring process.

In one variant, a measuring device is electrically connected at least to the grounding connection and the grounding probe, as a result of which, in particular, the potential difference - ie the electrical voltage - between the grounding connection and the grounding probe can be measured, for example for the determination of the potential funnel.

In some embodiments, the mobile terminal may send a trigger signal in the process to cause the meter to measure the electrical characteristics. In this case, the measuring device is set up to receive the triggering signal and to measure the electrical properties based thereon. The mobile terminal may also alternatively or additionally be equipped with an auto-recognition function, which it allows the mobile terminal to automatically detect the supply of the respective test voltage or the respective test current and thus automatically start the corresponding data acquisition. For the purposes of the invention, "based on" is to be understood as meaning at least "conditioned by" and / or "as a function of." In particular, determining one or more parameters to be determined, for example for determining the potential funnel, the contact voltage and / or the step voltage , on the basis of data - in particular measured data -, an input variable, one or more preceding parameters, a control, control and / or triggering signal or a combination thereof, whereby the result, ie the determined parameters, of a part of the The basis on which the determination is based - in particular functionally, in particular linear or polynomial - depend, while the result does not depend on another part of the basis.Also, the dependence may be due to a part of the basis, ie in particular that this part of the Based on which parts of the base the result depends on, the same applies to the taxation or taxation of the ins special based on parameters, input variables, control signals, tripping signals or data. For the purposes of the invention, "set up" means that a device is not only suitable in principle to perform a specific function - for example only after a specific program code has been loaded, that is to say when the device has been programmed, or the device has been determined in a specific way The apparatus has already been provided with all the means to actually perform the function, but the apparatus is preferably already programmed with a program code for this function and / or already shaped and / or arranged and / or already has one Configuration that the device actually fulfills the function. Advantageously, the transmission of the triggering signal by means of the mobile terminal and the measurement by means of the measuring device based on the triggering signal can be used to control the measurement of the electrical properties via the mobile terminal. This allows a person checking the grounding system, for example, to be located at a different location or location on the grounding system than the meter, which will increase the safety of the person, the efficiency of the measurements and / or the measurements Reliability of the measurements can be increased. For example, the person is not endangered by the measurement and / or does not have to take appropriate safety precautions and / or can carry out the measurement with fewer work steps. A falsification of the measurement due to an electrical influence of the person on the environment, in particular the grounding system can also be avoided.

It is also advantageously possible to reduce the workload and / or the number of persons required to carry out the measurements if the measuring device is firmly positioned at one position, in particular for checking the earthing system, for example in or at the grounding system. and then only a single person positions the grounding probe at the at least one position in the vicinity of the grounding system and electrically connects it to ground at that position, and also positions the mobile terminal there and determines that position by means of the mobile terminal and triggers the measurement.

In some embodiments, the electrical characteristics may include electrical impedance and / or electrical potential. In this case, a potential funnel is determined in some variants based on the respective measured electrical properties between the ground terminal and the ground probe. Advantageously, the potential funnel can be determined from the measurement of the difference in the electrical potential between the grounding connection and the grounding probe-that is to say the electrical voltage between the grounding connection and the grounding probe-in which case the grounding system does not additionally must be affected, but the existing potential funnel can be measured at the grounding system, or a defined test current can be fed through the grounding system, resulting in an at least substantially determined by the test current potential funnel. Also, the test current can be varied with respect to its current, so that the potential funnel depending on different currents, ie, test currents, can be determined. As a result, an error case in which the grounding system must derive a real fault current, simulate particularly realistic and thus check the correct function of the grounding system, preferably a test current is used, which corresponds to the expected error case, but preferably a smaller amplitude - ie , in particular current - - to avoid dangerous voltages.

An advantage of determining the potential funnel via the measurement of the electrical impedance between the grounding terminal and the grounding probe can be, in particular, that the impedance and thus the potential funnel can be determined for a predetermined frequency range, based on which measurements the behavior of the potential funnel and thus the Grounding system can be modeled for different situations in which the grounding system must divert a stream into the ground. Also, the impedance between the ground terminal and the ground probe can be determined without diverting any additional test current through the grounding system, eliminating operations, designs, and / or devices for injecting additional test current, thereby increasing work efficiency and / or safety elevated. In particular, in order to improve the modeling of the behavior of the potential funnel in various situations in which the grounding system must dissipate a current into the ground, the measured electrical properties may include both the electrical impedance and the electrical potential. Alternatively or additionally, in some variants, a step voltage may be determined based on the electrical characteristics between the ground probe and the touch point. The advantages of determining the step voltage via the electrical impedance, the electrical potential or a combination thereof correspond to those in the determination of the potential funnel.

Alternatively or additionally, in some variants, a contact voltage at the earthing system can be determined based on the electrical properties between the earthing probe and the contact point. In this case, the contact voltage between the ground probe and the point of contact of the object, which is usually located in the vicinity of the ground probe, be measured while the step voltage between a point of contact of the ground and the ground probe, which is in particular another point of contact to the ground, measured. The advantages of determining the contact voltage via the electrical impedance, the electrical potential or a combination thereof correspond to those in the determination of the potential funnel.

Advantageously, some variants in which the potential funnel, the step voltage and / or the contact voltage are determined, combine with each other, so that the amount and / or the degree of detail of measurements of electrical properties can be increased in a grounding system, so that the electrical properties, which are relevant in particular for electrical safety, can be better modeled for different situations. In some embodiments, a potential funnel, a step voltage, and / or a touch voltage is determined by the mobile terminal. In this advantageous manner, the determination can be carried out directly on site and the results can be displayed to a user directly after the measurement. Thus, the person who checks the grounding system and using the mobile terminal, a possible repeat erroneous measurement after the results are displayed, which can increase the work efficiency and / or reliability of the measurement.

In some embodiments, the electrical properties may be measured at multiple locations, thereby performing the method at least for a further position in the vicinity of the grounding system. In this advantageous manner, it is possible to determine the electrical properties of the earthing system for different spatial positions, which can be modeled depending on space, in particular the electrical properties.

In some embodiments, in the method, first the potential funnel and / or the step voltage and / or the contact voltage are determined on the basis of the previously measured electrical properties for the respective positions. In addition, it is determined in the method based on one or more evaluation methods whether the measurement must be repeated at one of the previous positions and / or a further measurement must be performed at a further position. Finally, if so, output by the mobile terminal that this measurement must be repeated or another measurement must be performed. In this advantageous manner, it is possible to selectively repeat a possibly erroneous measurement - and not only later, when after performing the measurements and the evaluation of the measurements shows such an error - and / or selectively carry out further measurements until a sufficient number and / or goodness of measurements for the required evaluation and / or modeling of the electrical properties of the earthing system is present. This can increase the reliability of performing the measurements and / or checking the earthing system, increase the working efficiency and / or improve the extent and / or the quality of the results thus obtained.

Advantageously, in some variants, the potential funnel and / or the step voltage and / or the touch voltage can be determined by means of the mobile terminal and / or be determined by means of the mobile terminal, whether the measurement must be repeated and / or a further measurement must be performed.

According to some embodiments, in which, based on evaluation criteria, it is determined whether a measurement must be repeated or performed at a further position, one of the evaluation criteria for determining an potential funnel may be an impedance curve which increases with increasing distance of the ground probe from the grounding system Direction changes relatively less. In this advantageous manner, it can be stated that the impedance curve converges to an at least essentially fixed value and thus converges to this value when converging to this value - ie, in particular if the respectively measured values for the impedance curve are only a predetermined, in particular small, distance from the convergence value If the measuring method has ended, ie no further measurements are carried out, and / or if a measured value deviates from the expected impedance curve more than a predetermined limit value, the measurement for this position and / or this impedance value can be repeated.

According to some embodiments, in which, based on evaluation criteria, it is determined whether a measurement has to be repeated or performed at a further position, one of the evaluation criteria for determining an potential funnel may be a potential profile which increases as the distance of the ground probe from the grounding system increases along the ground Direction relatively less or at least substantially does not change. In this advantageous manner, it can be stated that the potential curve converges to an at least substantially fixed value and thus converges to this value when in particular when the respectively measured values for the potential curve are only a predetermined, in particular small, distance from the convergence value have - the measuring method are terminated - so no further measurements are performed - and / or if a measured value of the expected potential curve stronger than a predetermined Limit value deviates, the measurement for this position and / or this potential value are repeated.

Accordingly, in some embodiments, one of the evaluation criteria may be a measured electrical potential between the grounding probe and the grounding terminal of the grounding system, which, in particular at a certain distance from the grounding system, reaches the ground reference potential that the ground has when it is not traversed by current , For some grounding systems and / or earth tests, distances of 300 m, 1 km, 2 km or even more from the earthing system may be necessary.

In the method of some embodiments in which the electrical properties are measured at multiple locations, a log of the locations to which measurements have been made and / or a log of the properties being measured and, in particular, data indicating whether the electrical characteristics are present may be stored between the ground terminal and ground probe for a potential horn and the earth probe and the touch point for a tapping voltage have been stored. In this case, the respective protocol or a protocol which combines the positions, the respectively measured properties and / or further data, can be stored by means of the mobile terminal. In this advantageous manner, the reliability of the measurements can be increased, simplify the implementation of such a method for measuring the electrical properties and / or reduce the number of required operations. In addition, the reliability can advantageously be increased and / or errors avoided by jointly recording the respective position and the values of the electrical properties measured for each position.

Advantageously, in some variants, in particular by means of the mobile terminal, the protocol automatically - ie in particular without human intervention or operation - can be created and saved, avoiding logging errors and / or reducing the amount of work required.

In some embodiments, the grounding probe and the mobile terminal may be positioned at the at least one position, or may be positioned there. In addition, the mobile terminal determines this position via a positioning system.

For the purposes of the invention, a "positioning system" is to be understood as at least one system which is set up to determine the spatial position of an object or to determine it by means of an additional position device In particular, the spatial position may be determined as an absolute position-that is, with absolute coordinates, in particular for this position system-or as a relative position relative to a reference point For this purpose, the position system can emit signals which are received and processed by the position device for position determination, so that the position can be determined on the basis of the received signals e be emitted from the reference point or from further reference points, wherein the reference points relative to each other and / or relative to the position of the object may be fixed or movable. Also, a positioning system may be arranged to determine a position of the object based on geographic data that may be stored in a database, for example, and which serve as a reference together with geographic data measured for the position to be determined. For position determination, a mobile terminal may have a position device which interacts with a position system external to the mobile terminal, and / or even have a position system which, in particular due to its spatial extent and / or weight, for integration into a mobile Terminal is suitable. A positioning system according to the invention is in particular the Global Positioning System (GPS), GLONASS, Galileo, Beidou, a means for determining position based on Wi-Fi data and / or TERCOM (Terrain Contour Matching) or a corresponding system or a corresponding further development ,

An advantage of the determination of the position via the position system and / or by means of the mobile terminal can lie in particular in the fact that such a position determination is easier, faster, more reliable and / or more precise compared to other possibilities for doing this - for example via a measuring wheel or the counting of steps is. This makes it possible to improve the measurement of electrical properties in a grounding system, in particular to check a grounding system, and in particular to increase the working efficiency and increase the quality of the measurements thus obtained. It may also be possible for only a single person - namely, in particular the user of the mobile terminal - to take the measurements. Advantageously, the method can be simplified and thus in particular avoid sources of error if the earthing probe and the mobile terminal are positioned at the at least one position or at the further position in which the earthing probe is electrically connected to the ground. In some embodiments, digital cartographic information in the form of an image or map for the environment of the grounding system is displayed by the mobile terminal. By this advantageous manner, the user, who can in particular make the measurements and positioned about the earthing probe, makes an electrical connection of the grounding probe to the ground, makes an electrical connection of a measuring sensor with a contact point and / or individual parts of the method triggers in the vicinity of the earthing system.

In the method according to some embodiments, in which digital cartographic information is displayed, one or more positions may be displayed at which the electrical properties have been measured and / or for measuring a potential funnel of the earthing system and / or a step voltage and / or a contact voltage at the grounding system to be measured. In this advantageous manner, it is possible in particular to understand where measurements have already been carried out. It is also advantageous to indicate at which positions still measurements must be performed. This makes it possible in particular to avoid human errors when carrying out the measurements and / or to simplify the work of the person who carries out the measurements and thus make them more efficient in particular. It is also possible to ensure that certain - for example critical - positions are reliably measured. These may be, for example, preferably positions at which a particular hazard - such as a possibly high step voltage or contact voltage - is to be expected. Also, certain positions can be measured again at intervals, for example, during a repeated inspection of the earthing system. This may be advantageous, in particular, at positions at which uneven measured values are present. For example, the electrical properties could depend on the weather, in particular the moisture of the soil.

In some embodiments, to measure electrical characteristics, a test current may be conducted by a meter into the grounding system or via a power line of a high voltage network or an auxiliary electrode. In this advantageous manner, a defined test situation for the earthing system can be generated.

In some embodiments, a meter may be electrically connected to at least the ground terminal of the grounding system and a power line of a high voltage network. As a result, in particular, a test current can be fed from the power line into the grounding system via its ground connection.

In a further development, this test current to be fed in can be supplied via the power line from a counterelectrode, in particular a further grounding system, which extends from the one to the other In this way, a test of the earthing system that is independent of the high-voltage network can be carried out and thus in particular the safety and reliability of the test can be increased. In this case, a greater spatial distance between the grounding system to be tested and the counterelectrode makes it possible to avoid intersecting potential funnels and thus a possible falsification of the measurements and / or an occurrence of step voltages, which can be dangerous for persons.

Correspondingly and advantageously, in some embodiments, for determining a potential funnel of the grounding system and / or a step voltage in the grounding system, a test current can be conducted via a power line of a high voltage network from another grounding system with a predetermined spatial distance in the ground terminal. In some embodiments, measuring the electrical characteristics to determine a step voltage or voltage at grounding may be done by a handheld meter. In this case, this hand-held measuring device is electrically connected at least to the earthing probe and the contact point or is electrically connected in the method, in particular automatically or by a person who performs the measurements. In some variants, the grounding probe may be formed as a metallic pile or as a metal plate. Also, the hand-held measuring device may have a measuring sensor, by means of which the electrical connection of the hand-held measuring device to the contact point is produced. An advantage of the hand-held measuring device can be, in particular, that the person can carry the hand-held measuring device for carrying out the measurements in his hand, so that it is easier to carry out measurements at different positions and / or to avoid longer measuring cables. The reliability can advantageously be increased if, in some variants, an additional measuring device which feeds a test current into the grounding system is arranged directly at or in the earthing system, while the person carries out the respective measurements by means of the hand-held measuring device and / or the additional measuring device optionally controls together with the hand-held measuring device for the measurement by means of the hand-held measuring device. In some variants, the mobile terminal, the hand-held measuring device and / or the earthing probe can advantageously be combined with one another and, in particular, connected to one another in such a way that they can be positioned together, in particular as a physical unit.

The hand-held measuring device may in some embodiments be designed in accordance with the measuring device or correspond to the measuring device, wherein the hand-held measuring device is mobile, in particular portable by a user. In some embodiments, the hand-held measuring device may in particular be set up to receive a trigger signal from the mobile terminal and / or to send measured values to the mobile terminal.

A second aspect of the invention relates to a computer program product for measuring electrical properties in a grounding system. This computer program product has or provides computer readable instructions which, when executed on a mobile terminal, cause the mobile terminal to perform at least those parts of the method according to the first aspect of the invention which are carried out by means of a mobile terminal according to the first aspect of the invention ,

The previously mentioned possible advantages as well as embodiments, developments or variants of the first aspect of the invention also apply correspondingly to the computer program product according to the invention. In some embodiments, the computer program product may include a nonvolatile data storage, in particular a nonvolatile data carrier such as a CD-ROM, a hard disk or a USB memory stick, on which the computer readable instructions are stored. In this advantageous manner, the computer-readable instructions can be physically transported and / or transmitted by means of this data memory. In some embodiments, the computer program product comprises a data processing device configured to provide the computer readable instructions. For this purpose, the data processing device can be set up to transmit the computer-readable instructions by means of a data connection to a mobile terminal on which the computer-readable instructions are to be executed. In this advantageous manner, the computer-readable instructions can be provided to the mobile terminal for execution regardless of physical transport.

A third aspect of the invention relates to a mobile terminal for a user, in particular a tablet computer, for measuring electrical properties in a grounding system, which is connected to a ground. The mobile terminal includes a positioning device, a communication interface for receiving data indicating electrical characteristics, and a data storage device. The mobile terminal is arranged to determine at least one position at which a grounding probe is electrically connected to the ground by means of the positioning device. In addition, the mobile terminal is adapted to receive, by means of the communication interface, data indicative of electrical characteristics measured between the ground probe and a ground terminal of the grounding system or a ground contact point or an object in a predetermined range of the at least one position. Finally, the mobile terminal is set up to store, by means of the data storage device, the at least one position as well as the data which characterize the measured electrical properties for this position.

For the purposes of the invention, a "data storage device" is a device for storing data, which is in particular for forming a data connection with a further device, in particular a data processing device, or with other parts of a device which also has the data storage device. set up and / or has a data connection with it. In this case, by means of the data connection, data can be transmitted from the further device or the further parts to the data storage device for storage and / or for retrieving stored data they can be transmitted from the data storage device to the further device or to the further parts. Preferably, the data storage device comprises at least one non-volatile data memory. Also preferably, the data storage device comprises at least one volatile electrical data storage. The previously mentioned possible advantages as well as embodiments, developments or variants of the preceding aspects of the invention also apply accordingly to the mobile terminal.

In some embodiments, the communication interface comprises or at least substantially consists of a communication device. In addition, the mobile terminal is set up to receive a data signal from a measuring device by means of the communication device, wherein the data signal identifies the electrical properties measured by means of this measuring device. In this advantageous manner, the measured electrical properties can be automatically transferred from the measuring device to the mobile terminal and thus in particular increase the working efficiency and / or avoid errors in a manual transmission.

In some embodiments, the communication interface includes or at least substantially includes input to the user. In this case, the mobile terminal is set up to receive inputs from the user with regard to the measured electrical properties and thus to receive, based on the inputs of the user, the data which characterize the measured electrical properties. Advantageously, the measured electrical properties can thus be received, for example even when data signals - for example due to electrical (interference) fields, which in the grounding system and / or at a High-voltage system with this grounding system occur - be disturbed and thus a data transfer is difficult or impossible.

In some embodiments, the communication interface may include, or at least substantially consist of, a communication device. In addition, the mobile terminal is set up to send a triggering signal to a measuring device by means of the communication device in order to cause it to measure the electrical properties on the basis of the triggering signal. In this advantageous manner, it becomes possible, in particular, to automate the measuring process, which makes it easier to carry out the measurements, to increase the working efficiency and / or to increase the reliability when checking the grounding systems.

A fourth aspect of the invention relates to a mobile terminal, in particular a tablet computer, which is arranged to execute the computer-readable instructions of the computer program product according to the second aspect of the invention. In some embodiments, this mobile terminal may be configured according to the third aspect of the invention. The possible advantages already mentioned above as well as embodiments, developments or variants of the preceding aspects of the invention also apply correspondingly to the mobile terminal according to the invention according to the fourth aspect of the invention. A fifth aspect of the invention relates to a measuring system for measuring electrical properties in a grounding system which is connected to a ground. The measuring system includes a mobile terminal according to the third or fourth aspect of the invention, a grounding probe electrically connectable to the ground at at least one position in an environment of the grounding system, and a measuring device for measuring the electrical characteristics between the grounding probe and a ground terminal of the grounding system or a contact point of the ground or an object in a predetermined area of the at least one position.

The possible advantages already mentioned above as well as embodiments, developments or variants of the preceding aspects of the invention also apply correspondingly to the measuring system according to the invention.

A sixth aspect of the invention relates to a measuring system for measuring electrical properties in a grounding system, which is set up to carry out a method according to the first aspect of the invention. In some embodiments, this measurement system may be configured in accordance with a measurement system of the fifth aspect of the invention.

The possible advantages already mentioned above as well as embodiments, developments or variants of the preceding aspects of the invention also apply correspondingly to the measuring system according to the invention according to the sixth aspect of the invention.

A seventh aspect of the invention relates to a grounding probe. This earthing probe has a holder for a mobile terminal according to the third or fourth aspect of the invention. In addition, the grounding probe is arranged to be positioned at least one position on a ground and there electrically connected to the ground. In addition, the holder is arranged to hold the mobile terminal so that it can be positioned and / or transported together with the grounding probe in this position as a physical unit.

The above-mentioned possible advantages as well as embodiments, developments or variants of the preceding aspects of the invention also apply correspondingly to the earthing probe according to the invention. An advantage of the grounded probe with holder can be, in particular, that the grounding probe can be positioned together with a mobile terminal at the at least one position, which in particular reduce the work steps and avoid possible errors due to different positions of the grounding probe and the mobile terminal.

In some embodiments, the grounding probe may include a carrying handle. In some embodiments, the carrying handle may be made of an electrically insulating material or may be electrically insulated from other components of the earthing probe, which may in particular increase safety.

Some embodiments of the holder can be made of an electrically insulating material or have an insulation device for electrical insulation of other components of the ground probe, which in particular increase safety and / or damage to the mobile terminal can be avoided due to currents or voltages.

In some embodiments, the mount may be configured to include other components of the grounding probe, in particular one or more parts, by which the electrical connection to the ground is made, or a handle of the grounding probe, and the mobile terminal in a predetermined or adjustable spatial arrangement, position and / or orientation relative to each other. Thus, it is possible to specify the spatial arrangement, position and / or orientation of the mobile terminal relative to the grounding probe or components thereof or to make it adjustable for a user, whereby in particular the ease of use and / or the working efficiency can be increased.

In some embodiments, the mobile terminal may be at least substantially cuboidal. In some variants, a substantially cuboid mobile terminal may have a longitudinal axis and a length along this longitudinal axis between 5 cm and 25 cm. In some variants, an at least substantially cuboid mobile terminal may have a transverse axis and be between 2 cm and 15 cm wide along this transverse axis. In some variants, an at least substantially cuboid mobile terminal device may have a vertical axis and have a height between 1 mm and 3 cm along this vertical axis.

In some embodiments, the holder of the grounding probe may be configured to physically, in particular positively and / or non-positively hold the mobile terminal. For this purpose, the holder may in particular comprise one or more holding elements, which touch the mobile terminal, in particular when it is arranged in a receiving area of the holder, with a predetermined force or at least partially and thus hold positively and / or positively.

In some embodiments, the mobile terminal comprises a magnetizable metal area or a magnet which is particularly intended to interact with a mount for such a mobile terminal so that such a mobile terminal can be magnetically attracted between the mount and the magnet Area is held with the magnetizable metal or magnet.

In some embodiments, the grounding probe mount may include a magnet and / or magnetizable metal that interacts with a corresponding magnet or magnetizable metal of the mobile terminal such that the mobile terminal is held by the magnetic attraction.

Methods, devices and systems according to embodiments as well as subsequent exemplary embodiments make it possible in particular to carry out measurements of electrical properties in a grounding system, in particular checking a grounding system, more efficiently, more safely, for example for a person performing the measurements performs, and / or to make more reliable. In particular, some embodiments and / or embodiments of the method can be carried out at least partially automated. For this purpose, in particular in some embodiments and / or exemplary embodiments, a device or a system or a part thereof can be set up to execute process parts automatically, or to automatically execute process parts by means of these devices, systems and / or parts thereof.

For the purposes of the invention, "automatically" means at least that a part of a method, in particular a method step, and / or a functionality of a device can be executed without human intervention.

Various effects and advantages can be achieved with methods, devices and systems according to embodiments and subsequent embodiments. In particular, carrying out such a measurement can be made safer, more efficient and / or faster, reduce the personnel expenditure and / or the time expenditure therefor and / or increase the reliability, the degree of detail and / or the precision of the results obtained.

Further advantages, features and possible applications emerge from the following detailed description of exemplary embodiments and / or from the figures.

BRIEF DESCRIPTION OF THE FIGURES The invention is explained in more detail below with reference to the figures with reference to advantageous embodiments. Like elements or components of the embodiments will be denoted essentially by like reference numerals, unless otherwise described or otherwise indicated by context. To show this, partially schematized:

1 shows a method for measuring electrical properties in a grounding systems according to an embodiment.

FIG. 2 shows a computer program product for measuring electrical properties in a grounding system according to an embodiment; FIG.

3 shows a mobile terminal for measuring electrical properties in a grounding system according to an embodiment;

4 shows a ground probe according to an embodiment; and

5 shows a measuring system for measuring electrical properties in a grounding system according to an embodiment, together with a grounding system and further parts of a high-voltage network.

The figures are schematic representations of various embodiments and / or embodiments of the present invention. Elements and / or components shown in the figures are not necessarily drawn to scale. Rather, the various elements and / or components shown in the figures are reproduced in such a way that their function and / or purpose will be understood by those skilled in the art. In the figures, connections and couplings between functional units and elements may also be implemented as indirect connections or couplings. In particular, data connections can be wired or wireless, that is to say in particular as a radio connection. Also, certain connections, such as electrical connections, such as for energy supply, for the sake of clarity, not be shown. DETAILED DESCRIPTION OF EMBODIMENTS

1, a flowchart of a method 100 for measuring electrical properties in a grounding system according to an embodiment of the present invention is shown.

In one exemplary embodiment, method 100 includes method steps 122, 124, 126, 128, 130, 132, 134, 136, 138, 140, and 142, and in some variants method step 120 and / or method step 144. The method 100 begins at the start of the process 102 and ends at the end of the process 104, wherein one or more method steps, in particular a sequence of method steps, and preferably the entire method can be carried out repeatedly. In some variants, in method step 120, a measuring device can be arranged at or spatially in the grounding system and the measuring device can be electrically connected at one of its terminals to a grounding connection of the grounding system, a grounding probe and in particular also to a power line of a high-voltage network, wherein preferably the power line additionally is electrically connected to another grounding system, which has a predetermined spatial invention of the grounding system. The meter may be a hand-held meter or a portable meter. Advantageously, the spatial distance of the two grounding systems can be chosen so that even with a maximum expected fault current between the two grounding systems each on a soil on which the grounding systems are installed, no electrical voltages and / or currents occur, the people, animals , Equipment or the equipment itself. In other variants of the exemplary embodiment, the measuring device may already be positioned at or in the earthing system and / or already permanently installed there. Also, at least one, several or all electrical connections can already be made. In method step 122, a mobile terminal and the grounding probe are positioned at at least one position in an environment of the grounding system and the grounding probe is electrically connected there to the ground to which the grounding system is connected. In this case, the security can advantageously be increased by the mobile terminal being electrically isolated from the measuring device.

In method step 124, this at least one position is spatially determined by means of the mobile terminal. In this case, the position can be determined in particular by means of GPS.

In step 126, the mobile terminal sends a trigger signal to cause the meter to measure the electrical characteristics. In this case, in particular the electrical potential between the earthing probe and the earthing connection of the earthing system can be measured as an electrical characteristic. For the sake of simplicity, the exemplary embodiment is described below for measuring the electrical potential-that is to say, in particular the electrical voltage-between the earthing probe and the earthing connection of the earthing system. It is understood that correspondingly also further electrical properties such as, in particular, a step voltage or a contact voltage can be measured and further processed.

In method step 128, a test current is fed by means of the measuring device via the earth connection of the grounding system for measuring the electrical potential between the grounding connection and the grounding probe. In this case, the test current can be conducted in particular via the power line of the high-voltage network and preferably serve as the high-voltage network or - particularly advantageous for safety - the other grounding system as a current sink or current source for the test current. Subsequently, in method step 130, the electrical potential between the grounding terminal and the grounding probe is measured. In particular, the electrical potential is measured as a function of the test current. In method step 132, the measuring device transmits a data signal-preferably by cable, for example by means of glass fiber, or wirelessly-which identifies the measured electrical potential-in particular as a function of the test current. In addition, the mobile terminal receives this data signal. Subsequently, in method step 134, the mobile terminal determines a potential funnel based on the measured electrical potential or supplements an already determined potential funnel by the currently measured value for the electrical potential between the grounding probe and the grounding connection. In method step 136, the values for the electrical potential at this position as well as the position and preferably also potential funnel data which characterize the potential funnel determined with the respectively measured electrical potentials are stored by means of the mobile terminal. In a method condition 1 1 1 of the method 100 determines whether the measurement must be repeated at the previous position. For this purpose, in particular the measured electrical potential with the expected electrical potential, which can be calculated for example by means of a simulated or based on previous measurements potential funnel, compared and if the deviation exceeds a predetermined threshold, in particular more than 500%, preferably already more than 100%, more preferably more than 50%, this criterion is defined as fulfilled. In this case, the mobile terminal in some variants, the setting, in particular automatically execute. If the measurement has to be repeated, the mobile terminal issues this in method step 138. In addition, the method steps are executed at least from method step 126 again. In some variations, method step 122 and / or method step 124 may also be performed again, such as when the positioning of the ground probe and / or the mobile terminal has been faulty and / or the electrical connection between the ground probe and the ground is faulty at that position has been. Also, it may be necessary to re-execute the two process steps 122 and 124 if the ground probe has been electrically connected to the ground at a wrong position. Execution of method step 124 may also be required if the position determination initially failed.

If the measurement does not have to be repeated, it is determined in a method condition 1 13 of the method 100 whether, in particular for determining the potential funnel with sufficient degree of detail and / or sufficient precision, a further measurement must be performed at a further position. For this purpose, a calculated potential profile can serve as an evaluation criterion, which can be simulated in particular on the basis of theoretical assumptions and / or can be calculated by means of the previously measured measured values and on the basis of the determined potential funnel. In this case, a potential curve of an potential funnel, as can be used for calculation, decreases with increasing distance of the grounding probe from the grounding system along one direction and also changes relatively less with increasing distance, so that the electrical potential converges towards a limit value. Finally, the criterion is met until the respectively measured electrical potential is sufficiently close to the expected limit value and / or the values for the two previously measured electrical potentials are sufficiently close to one another. This may be the case in particular if, when the distance in this direction is doubled, the electrical potential changes by less than 10% and / or if the electrical potential is at most 5% from the limit value. Also, an evaluation criterion may be the absolute distance of the ground probe be from the grounding system. Thus, for example, carrying out the measurements, ie in particular the method, can be ended if this distance is at least 5 km, in particular already at least 3 km and in particular already at least already 2 km.

If a further measurement has to be carried out, this is output in method step 140 by means of the mobile terminal.

Subsequently, in method step 142, the mobile terminal and the grounding probe are positioned at a further position and there the grounding probe is electrically connected to the ground. Subsequently, the method 300 is additionally executed starting from the method step 124-the determination of the position-for this further position. If no further measurement has to be carried out, in some variants of the exemplary embodiment, in a method step 144, a protocol of the positions to which the measurement has been made and of the respectively measured electrical potential can be stored. In this case, the mobile terminal can in particular automatically execute the storage of the protocol. After saving the protocol, the method 300 may be terminated or, especially for an additional protocol, re-executed.

2 shows a computer program product 200 for measuring electrical properties in a grounding system according to an embodiment of the present invention.

In one embodiment, the computer program product 200 comprises a CD-ROM on which computer-readable instructions are stored. In some variations, the CD-ROM includes a carrier disk 202 which is coated with a metal 204 for storage of data. Finally, in the metal layer 204, the data 206 is encoded. In the case of the computer program product 200, the data consist of the computer-readable instructions, have these, or encode them, in particular, among other data, for example for a file system and / or for error correction of the stored data. In doing so, when executed on a mobile terminal, these computer-readable instructions cause it to perform at least those parts of the method for measuring electrical characteristics in a grounding system, in particular according to the previous method 100, which can be performed by a mobile terminal or be executed.

In Fig. 3, a mobile terminal 300 for a user and for measuring electrical characteristics in a grounding system, in particular by this user, according to an embodiment of the present invention is shown schematically.

In one embodiment, the mobile terminal 300 is designed as a tablet computer.

In one embodiment, the mobile terminal 300 comprises a data processing device 310, a communication interface 320, a data storage device 330 and a position device 340. In some variants, the data processing device 310 may be designed in particular as a central processor unit (CPU), and thus - in particular with other components of the mobile terminal 300 - perform certain functions based on computer-readable instructions, for which purpose the mobile terminal 300 is set up. The communication interface 320 has or at least essentially consists of a communication device 322 and a user interface 324. The user interface 322 may in particular be designed as a touch-sensitive screen. The communication device is preferably set up for radio-based data connections.

In some variants of the mobile terminal 300, the positioning device 340 may at least substantially consist of or comprise a GPS receiver. Such a GPS receiver advantageously makes it possible to determine positions via the Global Positioning System (GPS), ie satellite-supported and almost worldwide.

The mobile terminal 300 is set up to determine, by means of the positioning device 340, at least one position at which a grounding probe is electrically connected to the ground. In addition, the mobile terminal may receive both by means of the communication device 322 and by means of the user interface 324 data indicative of electrical characteristics measured between the grounding probe and a ground terminal of the grounding system or a ground contact point or an object in a predetermined range of the at least one position have been. In this case, the mobile terminal 300 can in particular receive data signals-preferably radio signals-from a measuring device which has measured the electrical properties and / or receive from the user via the user interface 324 inputs from a user which characterize the measured electrical properties. Finally, the mobile terminal 300 is arranged to store, by means of the data storage device 330, the at least one position as well as the data which characterize the measured electrical properties for this position.

4 schematically shows a ground probe 400 according to an embodiment of the present invention. In one embodiment, grounding probe 400 includes a handle 410, a metal bar 420, and a mobile terminal mount 430, particularly for a mobile terminal 300 according to the previous embodiment of FIG. 3.

The metal rod 420 may include a thread 422 by means of which the metal rod may be screwed into the ground to establish an electrical connection. In some variants, the handle is advantageously designed as a crankshaft, so that the metal rod 420 can be screwed by turning this crankshaft into the ground.

In some variations, the metal bar 420 may be cone-shaped or have a cone-shaped element. In addition, the metal rod 420 can be pointed at the end opposite the handle 410 or have a tip, in particular the conical element, whereby the metal rod 420 can pierce in the direction of this end more easily in the ground and / or can drive and thus in particular the Electrical connection of the grounding probe to the ground when making the measurements - in particular the checking of the grounding system - easier. In particular, in order to improve safety when using the grounding probe, the handle 420 may be made of, consist of, or at least electrically insulated from the metal bar 420 from an electrically insulating material.

For connection, in particular to a measuring device, the grounding probe 400 can also have an electrical connection 402, which is electrically connected to the metal rod 420.

For physically holding the mobile terminal, the holder 430 has two holding elements, which can be designed as gripping elements 434 and 436, wherein at least one of the gripping elements on a mounting base 432 of the holder 430 attached, in particular movably mounted. In particular, for holding the mobile terminal of this gripping element can be moved so that the mobile terminal is clamped in a receiving area between the two gripping elements 434, 436 and thus held positively and / or positively.

In some variations of the grounding probe 400, the handle 410 may include a head 412 for a hammer so that the head 412 of the handle 410 may be hit with the hammer to drive the metal rod 420 into the ground. Advantageously, a handle 410 designed as a crankshaft can be arranged relative to the holder 430 such that the handle 410 protects the holder 430 from impacts that miss the head 412.

FIG. 5 schematically shows a measuring system 1 according to an embodiment of the present invention for measuring electrical properties in a grounding system. In addition, there are dashed lines the grounding system and other components of a high voltage network, in particular a power pole at the grounding system, another power pole together with another grounding system and a power line, which extends from the other grounding system on the two power poles, schematically indicated as dashed lines, said in particular, these are not part of the measuring system. However, these may be configured to perform the measurement in a particular way, in particular, for example, the power line may be electrically connected to the other grounding system.

In one exemplary embodiment, the measuring system 1 has a measuring device 10, a mobile terminal 300 and a grounding probe 400. In addition, electrical connections between these components, preferably by means of insulated cables, each be components of the measuring system 1.

The mobile terminal 300 may in particular be designed and / or set up according to one of the preceding embodiments, which to execute computer-readable instructions from a computer program product according to one of the preceding embodiments.

In some variants of the measuring system 1, the grounding probe 400 may be designed according to one of the preceding embodiments.

Alternatively or additionally, the earthing probe 400, as shown in Fig. 5, a metal plate 440 for establishing an electrical connection to the ground and a holder 430 and an electrical connection 402, which is electrically connected to the metal plate 440 and by means of which further Components of the measuring system 1, in particular the measuring device 10, can be electrically connected, for example via cable.

The measuring device has at least three electrical connections 12, 14 and 16. In addition, the meter 10 is configured to measure electrical characteristics between the ground probe 400 and a ground terminal of the grounding system. Specifically, as illustrated in FIG. 5, the grounding probe 400 may be electrically connected to the meter 10 via the electrical terminals 402 and 16 by means of a cable (shown in FIG. 5 as a dotted curve). In addition, the measuring device 10 can be electrically connected to a grounding connection of the grounding system by means of the electrical connection 12 and a further cable. In addition, in particular in some variants, in which a test current is obtained via another grounding system and fed into the grounding system, the measuring device 10 can be electrically connected by means of the electrical connection 14 and via a power line with another grounding system or be.

While embodiments have been described in detail, particularly with reference to the figures, it should be understood that a variety of modifications are possible. In addition, it should be noted that the exemplary embodiments are merely examples of the scope of protection, the Application and the structure in any way should limit. Rather, by the foregoing description, the skilled person will be given a guide for the implementation of at least one embodiment, wherein various modifications, in particular alternative or additional features and / or modifications of the function and / or arrangement of the described components, may be made as desired by the person skilled in the art, without departing from the subject matter defined in the appended claims and its legal equivalents, and / or departing from its scope.

LIST OF REFERENCE NUMBERS

1 measuring system for measuring electrical properties in a

earthing system

10 measuring device

12, 14, 16 electrical connections of the meter

100 Method of measuring electrical properties in a

earthing system

102 Process start

104 end of the procedure

1 1 1 Procedure: Repeat measurement at position

1 13 Process Condition: Further measurement at another position

120 to 144 process steps

200 computer program product

202 carrier disk

204 metal layer

206 Stored data

300 mobile terminal

310 data processing device, in particular designed as a CPU 320 communication interface

322 communication device

324 user interface, in particular designed as

touch-sensitive screen

330 data storage device

340 position device

400 earthing probe

402 Electrical connection of the earthing probe

410 handle

412 head for a hammer

420 metal bar 422 thread

430 Mobile device holder

432 mounting base

434, 436 holding elements, in particular designed as gripping elements 440 metal plate

Claims

A method (100) for measuring electrical properties in a grounding system connected to a ground, comprising: determining (124) at least one position in an environment of the grounding system by means of a mobile terminal (300) to which a grounding probe (400 ) is electrically connected to the ground;

Measuring (130) the electrical properties between the grounding probe (400) and a grounding terminal of the grounding system or a contact point of the ground or an object in a predetermined range of the at least one position; and

Storing (136) the at least one position and the measured electrical properties for that position by means of the mobile terminal (300).

2. Method (100) according to claim 1, wherein the measurement of the electrical properties is effected by means of a measuring device (10) separate from the mobile terminal, in particular electrically isolated therefrom, and this measuring device (10) is connected at least to the grounding terminal and the grounding probe (400) / or a power line of a high voltage network is electrically connected (120).

The method (100) of claim 2, wherein the mobile terminal (300) sends a trigger signal to cause the meter (10) to measure the electrical characteristics; and wherein the meter (10) is arranged to receive the trigger signal and to measure the electrical characteristics based thereon.

4. Method (100) according to one of the preceding claims, wherein the electrical properties include the electrical impedance and / or the electrical potential; and wherein, based on the respectively measured electrical properties between the grounding connection and the grounding probe (400), a potential funnel of the grounding system and / or based on the electrical properties between the grounding probe and the contact point, a step voltage and / or a contact voltage at the grounding system, in particular by means of mobile terminal (300).

5. The method (100) according to one of the preceding claims, wherein the electrical properties are measured at a plurality of positions and, for this purpose, the method or parts thereof is carried out at least for a further position in the vicinity of the grounding system.

A method (100) according to claim 4 and claim 5, comprising:

Determining (134) the potential funnel and / or the step voltage and / or the contact voltage on the basis of the previously measured electrical properties for the respective positions, in particular by means of the mobile terminal (300);

Determining, based on one or more evaluation criteria, whether (1 1 1) the measurement has to be repeated at one of the previous positions and / or (1 13) another measurement must be performed at a further position, in particular by means of the mobile terminal (300); and

Outputting by means of the mobile terminal (300) that (138) this measurement must be repeated or a (140) further measurement must be performed, if so.

The method (100) of claim 6, wherein one of the evaluation criteria relating to determining the potential funnel is an impedance profile that relatively less changes with increasing distance of the grounding probe from the grounding system along one direction, and / or one of the evaluation criteria relating to determining the potential Potential funnel is a potential course, which changes relatively less with increasing distance of the ground probe from the earthing system along one direction.

8. Method (100) according to one of claims 5 to 7, characterized by storing (144) a protocol of the positions at which has been measured, the electrical properties measured in each case, and in particular respectively data indicating whether the electrical properties are between the ground terminal and ground probe (400) for a potential horn and the ground probe (400), respectively, and the touch point for a tapping voltage have been measured by the mobile terminal (300).

The method (100) according to one of the preceding claims, wherein the ground probe (400) and the mobile terminal (300) are positioned at the at least one position and at the further positions, respectively; and wherein the mobile terminal determines this position via a positioning system, in particular via the Global Positioning System.

10. The method (100) according to one of the preceding claims, comprising:

Display of a digital cartographic image for the environment of the grounding system by means of the mobile terminal (300).

1 1. Method (100) according to claim 10, wherein one or more positions at which the electrical properties have been measured and / or for determining a potential funnel of the earthing system and / or a step voltage and / or a contact voltage in the digital cartographic image are displayed Grounding system to be measured.

12. The method (100) according to one of the preceding claims, wherein for measuring the electrical properties, a test current is conducted by means of a measuring device (10) in the grounding system or via a power line of a high voltage network or an auxiliary electrode (128).

13. A method according to claim 12, wherein for determining a potential funnel of the grounding system and / or a step voltage in the grounding system, a test current is conducted via a power line of a high-voltage network from another grounding system with a predetermined spatial distance into the grounding connection (128).

A computer program product (200) for measuring electrical characteristics in a grounding system, comprising or providing computer-readable instructions which, when executed on a mobile terminal (300), cause it to perform at least those portions of the method (100) according to any one of the preceding claims. which are carried out according to the preceding claims by means of a mobile terminal (300).

15. A mobile terminal (300) for a user, in particular a tablet computer, for measuring electrical properties in a grounding system, which is connected to a ground, comprising: a positioner (340); a communication interface (320); and a data storage device (330); wherein the mobile terminal is arranged to: determine at least a position at which a grounding probe (400) is electrically connected to the ground by means of the positioning means (340); receiving, by the communication interface (320), data describing electrical characteristics measured between the grounding probe (400) and a ground terminal of the grounding system or a ground contact point or an object in a predetermined range of the at least one position; and by means of the data storage device (330) to store the at least one position and the data describing the measured electrical properties for that position.

The mobile terminal (300) according to claim 15, wherein the communication interface (320) comprises a communication device (322) and the mobile terminal is adapted to receive (132) by the communication device a data signal from a meter (10), the data signal describes the electrical properties measured by this meter.

17. Mobile terminal (300), in particular tablet computer, in particular according to claim 15 or 16, wherein the mobile terminal is set up to execute the computer-readable instructions of the computer program product (200) according to claim 15.

18. A measuring system (1) for measuring electrical properties in a grounding system, which is connected to a ground, comprising: a mobile terminal (300) according to one of claims 15 to 17; a ground probe (400) electrically connectable to ground at at least one position in an environment of the grounding system; and a measuring device (10) for measuring the electrical characteristics between the grounding probe (400) and a grounding terminal of the grounding system or a contact point of the ground or an object in a predetermined range of the at least one position.

The ground probe (400) comprising a mobile terminal (300) mount (430) according to any one of claims 15 to 17, wherein: the ground probe (400) is arranged positioned at at least one position against a ground and there with the ground to be electrically connected; and the holder (430) is arranged to hold the mobile terminal (430) so that it can be positioned and / or transported together with the grounding probe at this position as a physical unit.