JP6546551B2 - Portable earth leakage movement tester - Google Patents

Description

  The present invention relates to a portable leakage operation tester. In particular, the main body of the portable electric leakage operation tester is provided with a measurement current information input unit to which measurement current information determined for each measurement target device is input, and an information input auxiliary means for assisting the input of the measurement current information Relates to the measuring instrument provided.

  Various devices have been disclosed for measuring a leakage current in a device to be measured. For example, the following apparatus is disclosed as an apparatus for checking the operation of the leakage breaker or the leakage relay installed to prevent an electric shock accident or a fire due to the occurrence of an electric leakage in the electric path.

  Patent Document 1 discloses an earth leakage circuit breaker tester 20 made to achieve both accuracy and simplicity in measurement.

  Specifically, when performing an operation test of the earth leakage circuit breaker 10 to be measured, the tester does not press the button provided on the earth leakage circuit breaker tester 20 for starting the measurement, but the tester is placed at the measurement point of the earth leakage circuit breaker 10 The measurement is automatically started when a predetermined time elapses after the measurement terminals 1 and 2 are brought into contact with each other.

  In particular, in order to automatically measure the operation test after a predetermined time has elapsed, the contact between the measurement point of the earth leakage circuit breaker 10 and the measurement terminals 1 and 2 of the earth leakage circuit breaker tester 20 due to shaking of the operator's hand or the like. It is possible to prevent an erroneous measurement due to chattering caused by a defect and to be excellent in accuracy.

  Then, when the test current is replaced with various other values to check the inoperability of the earth leakage breaker 10 or to check the operation, it is easy to continuously perform the measurement.

  Since the operation test can be performed without releasing the hands from the measurement terminals 1 and 2, the burden on the operation test is reduced for the operator, and the measurement points of the leakage breaker 10 and the measurement terminals 1 and 2 Since erroneous measurement due to chattering due to contact failure is prevented, it is possible to make both measurement accuracy and simplicity.

  Patent Document 2 discloses an operation test apparatus that performs automatic combination of variable resistors in accordance with measurement conditions made to improve operability and operation efficiency at the time of measurement.

Specifically, when carrying out the operation test of the leakage breaker 10 to be measured, a plurality of variable resistors for adjusting the magnitude of the necessary current are not adjusted to a predetermined resistance value. Resistor selection circuit 7 combining a fixed resistance and a plurality of relay switches and opening / closing relay switches (RY0, RY1, RY2, RY'2) based on a key-input command to set the resistance of resistance selection circuit 7 to a predetermined value By providing a means for setting to, it is possible to automatically adjust the magnitude of the required current.

By making it possible to arbitrarily select the magnitude of the current necessary for the operation test by key operation, complicated resistance adjustment work is not required, and both the operability of the device and the operation efficiency can be improved.

  Patent Document 3 discloses an earth leakage circuit breaker tester made to achieve both the ease of measurement and the shortening of measurement time.

Specifically, when the sensitivity current measurement operation of the leakage breaker 4 to be measured is performed, the clock pulse generation unit inputs a clock pulse to the counter circuit. Then, the switching element is driven by the output signal of the counter circuit to which the clock pulse is input, whereby the resistance value of the resistor group R is varied for each cycle of the frequency of the electric circuit voltage and the magnitude of the pseudo leakage current flowing in the electric circuit. Change the

As a result, it is not necessary to manually adjust the magnitude of the pseudo leakage current flowing in the electric path at the time of measuring the sensitivity current of the earth leakage circuit breaker, thereby improving both the ease of measurement and the shortening of the measurement time. Can.

When the earth leakage circuit breaker 4 trips, power is not applied to the earth leakage circuit breaker tester 4, but the contacts of the switching element are held in the state at that time, and the probes of the earth leakage circuit breaker tester 4 The power source is restored by connecting to the power source side circuit of the circuit breaker 4, and the display value of the earth leakage circuit breaker tester is read.

JP 2003-197083 A Unexamined-Japanese-Patent No. 2001-84887 Japanese Utility Model Application Publication No. 6-64349

  As described above, various devices for measuring the leakage current in the device to be measured have been disclosed, and have excellent effects such as improvement in accuracy, easiness, and working efficiency at the time of measurement.

  On the other hand, when measuring the short circuit operation current of the device to be measured, in addition to reducing the measurement burden on the measurement worker and improving the measurement operation efficiency, in view of the stable supply of power, Normal operation can be one of the factors that sustain the stable supply of power.

  That is, since the circulation of supply and use of power is established by the equipment on the demand side functioning normally, the data at the time of measurement is recorded when measuring whether the equipment on the consumer side operates normally or not. It is necessary to grasp the tendency of malfunction or malfunction of the equipment by referring to the next measurement or comparing the measurement results.

  When comparing past and present data with measurement data and understanding trends, it is possible to reduce the labor of inputting operating current information at the time of measurement as much as possible, and to improve work efficiency and information input. It is desirable to improve accuracy.

  In view of the above-described circumstances, the present invention can reduce the time and labor required for an operator to input operating current information at the time of measurement and can improve the accuracy of input data in a portable electric leakage operation tester. Intended to provide.

  The portable electric leakage operation tester according to the present invention is configured to solve the above problems, and includes operating current information input means for inputting operating current information in the device to be measured, and input by the operating current information input means. Output current value determining means for calculating and determining the current value to be output based on the selected operating current information, and outputting the output current value determined based on the operating current information input by the operating current information input means to the electric path , And storage means for storing information as to whether or not the device under test has a current leakage operation according to the output current, and also includes information input auxiliary means for assisting the input of the operating current information. It is characterized in that it is configured.

  According to this configuration, when inputting the operating current information, the information input auxiliary means assists the information input, so that it is possible to reduce the time and effort of inputting the operating current information and to improve the accuracy of the input data. Can.

  In the portable electric leakage operation tester according to the present invention, the information input auxiliary means is an imaging means for imaging a desired part of a device to be measured.

  According to this configuration, it is possible to acquire imaging data by imaging a portion in which information necessary for conducting a leakage operation test in the device to be measured is described. Then, the imaging data is output to the output current value determination means, and the imaging data is read and analyzed to obtain operating current information.

  Further, the image pickup means is provided so as to be detachable from a case constituting a portable type leakage operation tester, and can be used by being detached outward from the case at the time of image pickup.

  According to this configuration, since the imaging means can be separated and used from the portable electric leakage operation tester, the tester main body can be brought close to the device to be measured when imaging the desired part in the device to be measured When it is difficult to do so, only the imaging means can be detached outward and the image can be taken close to the desired location, so that the measurement operation can be performed without difficulty.

  Further, the information input assisting means is a communication means for communicating with a communication circuit provided in the device to be measured.

  According to this configuration, since the communication means for communicating with the communication circuit provided in the measurement target device is provided, the operating current information can be acquired from the measurement target device by the communication means.

  As described above, the present invention provides a measuring device capable of reducing the time and labor required for an operator to input operating current information at the time of measurement in a portable type earth leakage operation tester. can do.

Block configuration diagram of a portable earth leakage operation tester according to the first embodiment Outline diagram when using imaging means as information input auxiliary means Outline diagram when communication means is used as information input auxiliary means Explanatory drawing of the operation | movement flow in 1st embodiment Example of statistical processing Example of statistical processing Block configuration diagram of a portable type leakage operation tester according to the second embodiment Example of statistical processing Block diagram of portable type leakage operation tester according to another example Explanatory diagram of the operation flow according to another example Explanatory view of a tester shown in a conventional form Explanatory view of a tester shown in a conventional form Explanatory view of a tester shown in a conventional form

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)

  First, the basic configuration of a portable electric leakage operation tester according to the present embodiment will be described using the block diagram of FIG.

  FIG. 1 shows an example in which a portable earth leakage movement tester is applied to an earth leakage circuit breaker. 1 is a main body of a portable type short circuit operation tester according to the present invention, 10 is a short circuit breaker to be a measurement target device, and 21 and 22 are tests to electrically connect the portable short circuit operation tester 1 to the short circuit breaker 10 It is a lead.

  The main body 1 has a substantially rectangular parallelepiped outer shape, and the housing is made of a resin case and a cover. Main components such as a power supply circuit and an output circuit for outputting current from the test leads 21 and 22 are accommodated in the housing. The size of the main unit is about 20 cm square and about 10 cm high, and the weight is about 2 kg, and can be carried with one hand.

  A power supply unit 14 serving as a power supply of the main body 1 is provided inside the main body 1 of the portable type leakage operation tester. The power supply unit 14 is connected to the power supply of the primary battery or the secondary battery via a switch, and includes a voltage adjustment unit and the like.

  Further, the main body 1 is provided with an information input means 11 for inputting information related to measurement, and operating current information input means 111 for inputting operating current information of the leakage breaker 10 to be a measurement target device; An ambient environment information input unit 113 for entering ambient environment information, a device information input unit 112 for entering device information of the leakage breaker 10 as a measurement target device, and an information input assistance unit 114 are provided.

  The output current value determining means 12 calculates and determines the current value to be output based on the operating current information input by the operating current information input means 11. And the current output means 13 which outputs the determined output current value is provided.

  In addition, a current detection unit 18 for detecting the current output by the current output means, and a voltage detection unit 16 for detecting a voltage applied to the device to be measured are further provided. For example, if the voltage of the electric path through which the device to be measured intervenes is a single-phase three-wire system, 100 V or 200 V is detected.

  Here, the information input unit 11 is configured by a touch panel liquid crystal display unit. Various information is input by touching the input screen displayed on the liquid crystal display unit with a finger or a pen. The input may be made by displaying the frequently input values in a selective manner and selecting the corresponding value, or by inputting numeric keys and selecting individual numbers. The information to be input is the operating current information of the leakage breaker, the surrounding environment information, and the device information.

  As ambient environment information, the outside temperature, humidity, weather information, etc. are input. Further, as the device information, the manufacturer name of the device, rated sensitivity current or rated current, device type information, manufacturing lot information, etc. are input. In addition, you may input remarks information as a note at the time of measurement.

  As the information input auxiliary means 114, an imaging means 114a is used. The imaging unit 114a is a camera device such as a CCD (charge imaging device) camera device or a CMOS (complementary metal oxide semiconductor) camera device which electronically captures an object to generate image data.

  Imaging data can be acquired by imaging a predetermined portion of the measurement target device in which information necessary for conducting the leakage operation test is described by the imaging unit 114a. Then, the imaging data is output to the output current value determination means, and the imaging data is read and analyzed to acquire operating current information.

  In addition, the imaging unit 114 a is provided so as to be removable from the casing constituting the portable electric leakage operation tester 1. As shown in FIG. 2, the casing of the imaging means 114a is configured to be able to be taken out outward, and between the imaging means 114a and the portable type leakage operation tester 1 by the lead wires for power supply and communication. A wireless communication circuit may be provided in each of the portable electric leakage operation tester 1 and the imaging unit 114a, and signal communication may be performed between the two by wireless communication. In this case, the imaging unit 114a may be provided with driving power supply means (for example, a primary battery, a secondary battery, a capacitor, etc.). The wireless communication method may adopt various methods such as Bluetooth (registered trademark) which can perform communication with power saving and specific low power wireless communication.

  Further, as the information input auxiliary means 114, a communication means 114b for communicating with the measurement target device 1 may be used. The communication unit 114 b acquires operating current information by communicating with a communication circuit (not shown) provided in the measurement target device 1.

  The communication circuit and the data storage unit are provided in the communication circuit, and the storage unit includes the manufacturer's name of the device, the rated sensitivity current, the rated current, and the model of the device, which are data specific to the device 1 to be measured. Information, production lot information, etc. are stored.

  The communication means 114b acquires operating current information by reading out the information stored in the communication circuit. The communication means may be configured using radio frequency identification (RFID). For example, the communication circuit includes an antenna provided to be able to receive a predetermined radio wave and an RFID tag for storing predetermined data, and the RFID tag receives a read start signal from a portable electric leakage operation tester. It is good to start communication with

  The output current value determination means 12 is configured by a microcomputer. The input information input by the operating current information input unit 11 or the information input auxiliary unit 114 is input to the output current value determination unit 12. The output current value determination means 12 determines the output current value by calculation based on the input operating current information. For example, when measuring the sensitivity current of the leakage breaker 10 as a measurement target device, when the rated sensitivity current of the leakage breaker 10 is 30 mA, 60% of the 30 mA is calculated to determine 24 mA as the output current value. At 10 mA, 60% of the 10 mA is calculated to determine 6 mA as the output current value.

  In order to determine the current to be output according to the rated current of the device to be measured, the output current value determination means 12 is provided with a storage unit and stores arithmetic expression data for calculation.

  For example, when the device to be measured is a leakage breaker, initial values (for example, 50%, 60%, 80) of data rescued by calculation with respect to current value information input by the operating current information input unit 11 Target value such as% ... etc.), and a transition equation (step value integration of the initial value and the stepwise transition, for example, initial value x 5%) for stepwise changing the output current with respect to the initial value An initial value x 1%, ...) is stored.

  The current output means 13 is configured by a constant current circuit. The constant current circuit outputs a current value determined by the output current value determination means 12, for example, a current of 24 mA. The constant current circuit is configured of a control unit connected to the microcomputer and an FET (field effect transistor) controlled by the control unit.

  When control is performed, the voltage detection unit 16 measures in advance the voltage applied to the device to be measured, and the information is input to the output current value determination unit 12 and the control unit from the output current value determination unit 12 Control signal according to the voltage information is output. As a result, the internal resistance can be switched according to the voltage information, and the constant current is maintained by quickly following the voltage fluctuation while limiting the voltage applied to the FET.

  In particular, when the output control of current is performed in a region where the current is small, for example, a low region of several milliamperes, the voltage applied to the device to be measured is measured in advance because the output current fluctuates with the voltage fluctuation. The magnitude of the output current can be controlled with high accuracy by switching the internal resistance in accordance with the voltage information obtained by the switching.

(About operation)

  Next, the operation of the portable electric leakage operation tester 1 will be described with reference to FIG. As a device to be measured, it is assumed that the rated sensitivity current of the leakage breaker is measured for the leakage breaker.

  First, the rated sensitivity current value of the leakage breaker to be measured is read from the nameplate or the like of the leakage breaker, and is input to the operating current information input means 111. (Step S001a)

  Next, ambient environment information is input to the ambient environment information input means 113. (Step S001b)

  Input is in text format, temperature = 25 ° C., humidity = 60%, weather = fine weather, etc. In addition, a temperature measurement unit capable of outputting data, a humidity measurement unit, a barometric pressure measurement unit, etc. are provided in a portable operation current measuring instrument, and input of ambient environment information is obtained by acquiring measurement data from these measurement units. It may be efficient. In addition, these measurement data may be stored in the storage unit 121.

  Next, device information is input to the device information input means 112. (Step S001c)

  The input is input in text format, such as equipment manufacturer name = company 、, rated sensitivity current = 30 mA, rated current = 60 A, type information = GBU-63 EC, manufacturing lot information = 201603, and the like. Further, as a memo at the time of measurement, it is input that it is used as a main part of the distribution board.

  When the input is made, the output current value determination means 12 calculates and determines the output current value based on the determined initial value. (Step S002)

  Then, the determined current value is output. (Step S003)

  Depending on the output current value, it is detected by the voltage detection unit 16 whether or not the leakage breaker to be measured has operated, and that the leakage operation or the non-operation has been stored in the storage unit 121.

(About the initial value)

  As an initial value, 50%, 60% and 80% are set as an example. The initial value of 50% is set because it is a lower limit value that can not be operated when the target device is an earth leakage circuit breaker.

  The initial value of 60% is determined because it is a lower limit value that can not be operated when the rated sensitivity current is as small as 10 mA when the target device is a leakage relay.

  The initial value of 80% is determined to test whether or not the target device operates at about 80% of the rated operation setting value.

  As described above, the measurement time of the operating current can be efficiently reduced by setting the initial value to a standard, that is, by setting the target value and performing the operation measurement.

  As described above, statistical processing can be performed as follows using the stored measurement data. As shown in FIG. 3, it is possible to confirm the transition of the leakage current as viewed by year, or, as shown in FIG. 4, the change in the leakage current as viewed by weather. The data in FIG. 3 and FIG. 4 are simulated data.

  It is possible to judge these comprehensively, and to be useful for grasping the tendency of the failure of the device or the possibility of not operating normally.

Second Embodiment

  Next, the second embodiment will be described.

  FIG. 7 shows a block diagram of a portable earth leakage movement tester according to the second embodiment. The difference from the first embodiment is that GPS information input means 114 for inputting place information is further provided as information input means, and the place information is stored in the storage means.

  The GPS information input means 115 is an electronic circuit which acquires a measurement place using Global Positioning System (GPS). The latitude, longitude, and altitude information at the measurement location is acquired by the GPS, and stored in the storage unit 121 together with the operating current information, the surrounding environment information, and the information specific to the device.

  By storing the data at the time of measurement in this manner, it is possible to statistically handle and confirm the change in the leakage current as seen in each area as shown in FIG. The data in FIG. 8 is simulated data.

  It is possible to judge these comprehensively, and to be useful for grasping the tendency of the failure of the device or the possibility of not operating normally.

  Other forms will be described.

  FIG. 9 shows a block diagram of a portable type leakage movement tester in another form. The difference from the second embodiment is that the microcomputer constituting the output current value determination means 12 receives the operation state data detected by the voltage detection unit 16 which is the operation state detection means for detecting the operation state of the device to be measured. It is a point that the operation state determination means 122 for determining whether or not the device to be measured has operated by being stored is further stored and implemented. Another difference is that the operation information determined by the operation state determination means 122 is reflected in the output current value determination means 12 and the current value output is calculated and determined.

  The operation of this point will be described with reference to FIG.

  As a device to be measured, it is assumed that the rated sensitivity current of the leakage breaker is measured for the leakage breaker.

  First, the rated sensitivity current value of the earth leakage circuit breaker to be measured is read from the nameplate or the like of the earth leakage circuit breaker, and is input to the operating current information input means 11. (Step S001)

  When the input is made, the output current value determination means 12 calculates and determines the output current value based on the determined initial value. (Step S002)

  Then, the determined current value is output. (Step S003)

  At this time, the number of outputs is counted using a counter provided inside the microcomputer. In step S003, since the output is performed for the first time from the start, the count is incremented from zero to one. And it memorize | stores in the memory | storage part provided internally.

  Next, the operation state determination means 17 determines whether or not the earth leakage circuit breaker 10 has operated before and after the output. (Step S004)

  The determination is performed by the voltage detection unit 16 detecting a voltage applied to the leakage breaker 10. After the current is output in step S003, when the voltage detected by the voltage detection unit 16 changes from 100 V to 0 V, it is determined that the leakage breaker 10 has been operated before and after the output. On the other hand, when it remains at 100 V before and after the output, it is determined that the earth leakage circuit breaker 10 has not operated (not operated).

  The operation flow will be separately described in the case where the earth leakage breaker 10 operates (flow A) and the case where it does not operate (flow B) before and after the output. As an example, the current value input by the operating current information input means 11 is 30 mA, the initial value in the output current value determination means 12 is 80%, the output current from the current output means 13 is 24 mA, stepwise with respect to the initial value. The transition equation for changing the output current is assumed to be the initial value × 5%.

  First, the flow A in the case where the earth leakage breaker operates before and after the output is as follows.

  When the earth leakage circuit breaker 10 is operated by the first current output, the microcomputer provided with the output current value determination means 12 reduces the output. (Step S105)

  Since the degree of decrease at this time is 24 mA × 5% = 1.2 mA based on the above-mentioned displacement equation, the current value to be output next is set to decrease as 24 mA−1.2 mA = 22.8 mA. Also, since the output is the second time, the count is increased by 1, and n = 2. Then, the current set to 22.8 mA is output. (Step S106) In the flow, i is an integer, and i ++ means to add 1 to i to increase it.

  Next, the operation state of the leakage breaker 10 after output is determined. (Step S107) Here, if the state is not changed, that is, it operates again, it means that the output current is the leakage current value that can be detected for the earth leakage breaker 10. Therefore, the process returns to step S105 and is performed again. Repeat the process. At this time, the count is incremented by 1, and n = 3. Also, the current value to be output next time is set to decrease to 22.8 mA-1.2 mA = 21.6 mA.

On the other hand, when the state changes before or after the output, that is, when it does not operate, it means that the output current is the leakage current value that the leakage breaker 10 could not detect. The operating current value is determined with the calculated current value. (Step S108)
Therefore, the operating current value in this case is 22.8 mA in this case.

  Subsequently, the flow B in the case where the earth leakage breaker does not operate before and after the output is as follows.

  When the earth leakage breaker 10 does not operate by the first current output, the microcomputer provided with the output current value determination means 12 increases the output. (Step S205)

  Since the increase degree at this time is 24 mA × 5% = 1.2 mA based on the above-mentioned displacement equation, the current value to be output next is set to increase to 24 mA + 1.2 mA = 25.2 mA. Also, since the output is the second time, the count is increased by 1, and n = 2. Then, the current set to 25.2 mA is output. (Step S206)

  Next, the operation state of the leakage breaker 10 after output is determined. (Step S207) Here, if the state is not changed, that is, it does not operate again, it means that the output current is the leakage current value which can not be detected for the leakage breaker 10, and thus the step S205. Return to and repeat the process again. At this time, the count is incremented by 1, and n = 3. Further, the current value to be output next time is set to increase to 25.2 mA + 1.2 mA = 26.4 mA.

On the other hand, when the state changes before or after the output, that is, when it operates, the output current is the leakage current value that can be detected by the earth leakage circuit breaker 10, so the operating current is the current value output this time Determine the value. (Step S208)
Therefore, the operating current value in this case is 25.2 mA in this case.

  As described above, by performing operation measurement with reference to a certain initial value, it is possible to accurately measure the operation current while efficiently reducing the measurement time of the operation current. Furthermore, the operating current can be measured more accurately by taking into consideration the operating condition of the device to be measured.

  The present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the present invention.

  For example, the value of the initial value may be configured to be selectable in the operating current information input means 11, and may allow or increase the setting to 40% which is reduced in addition to the illustrated 50%, 60% and 80%. You may allow the setting to 90%. In addition, in the transition equation for changing the output current stepwise with respect to the initial value, the integration of the initial value and the step of the stepwise transition is exemplified as the initial value × 5% and the initial value × 1% In addition, the initial value × 0.5% may be set to make the steps more precise, or the steps may be roughly provided to set the initial value × 10%.

  Furthermore, in order to make the measurement more efficient, the measurement of the integration of stepwise steps is performed in the state where the steps are roughened (initial value x 10%) for the purpose of setting a standard first, and the operation state of the measurement target device is Where it has changed (for example, the state change point in the flow A and the flow B), it is configured to be gradually refined (initial value x 5%, initial value x 3%, initial value x 1%) It is possible to achieve both efficiency and accuracy.

DESCRIPTION OF SYMBOLS 1 Portable type short circuit operation tester 10 Short circuit breaker 11 Information input means 111 Operating current information input means 112 Ambient environment information input means 113 Equipment information input means 114 Information input auxiliary means 114a Imaging means 114b Communication means 115 GPS information input means 12 Output current value determination means 121 storage means 13 current output means 14 power supply unit 16 operation state detection means 17 operation state determination means 18 current detection portion 21 test lead 22 test lead

Claims (4)

A portable earth leakage operation tester for carrying out an earth leakage operation test of a measurement target device interposed in an electric path,
Operating current information input means for inputting operating current information in the device to be measured;
An output current value determination unit that calculates and determines a current value to be output based on the operation current information input by the operation current information input unit;
Current output means for outputting an output current value determined based on the operating current information input by the operating current information input means to the electric path;
And storage means for storing information as to whether or not the device under test has a current leakage operation according to the output current.
A portable earth leakage operation tester comprising information input auxiliary means for assisting the input of the operating current information.
The portable electric leakage operation tester according to claim 1, wherein the information input auxiliary means is an imaging means for imaging a desired part of a device to be measured.
The portable electric leakage according to claim 2, wherein the imaging means is detachably provided from a housing constituting the portable electric leakage operation tester, and can be detached outward from the housing at the time of imaging. Operation tester.
The portable information leakage operation tester according to claim 2 or 3, wherein the information input auxiliary means is a communication means that communicates with a communication circuit provided in a measurement target device.

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