WO2003073577A1 - Dispositif de controle destine a un disjoncteur comportant un declencheur electronique - Google Patents

Dispositif de controle destine a un disjoncteur comportant un declencheur electronique Download PDF

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Publication number
WO2003073577A1
WO2003073577A1 PCT/DE2003/000711 DE0300711W WO03073577A1 WO 2003073577 A1 WO2003073577 A1 WO 2003073577A1 DE 0300711 W DE0300711 W DE 0300711W WO 03073577 A1 WO03073577 A1 WO 03073577A1
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WO
WIPO (PCT)
Prior art keywords
test
current
input
circuit breaker
expected
Prior art date
Application number
PCT/DE2003/000711
Other languages
German (de)
English (en)
Inventor
Holger Hochgraef
Andreas Pancke
Hans Rehaag
Wolfgang Röhl
Peter Schust
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2003073577A1 publication Critical patent/WO2003073577A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • H02H3/044—Checking correct functioning of protective arrangements, e.g. by simulating a fault
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
    • G01R31/3272—Apparatus, systems or circuits therefor

Definitions

  • the invention relates to a test arrangement for a circuit breaker installed in a switchgear assembly with an electronic release, the test arrangement comprising a test current source and a test device in addition to the circuit breaker to be tested.
  • the first is that an on-site inspection, deliberately limited to sub-functions, is carried out.
  • the overcurrent release which is installed in the switch, is supplied with a signal from the outside that corresponds to the signal that would be applied to it by the associated current transformer.
  • the second way of checking is to connect an external device to the release via an existing access socket, which generates a current signal that should trigger the release. If the trip occurs, the proper functioning of the overcurrent release is confirmed, otherwise a faulty function can be identified.
  • test transformer which can generate a test current in the order of magnitude of, for example, 6000 A at a constant level, even over a longer period.
  • a function test that includes the current transformer has so far only been common for residual current transformers. Such an arrangement is described in EP-A 0 456 586.
  • a short-circuit connection between a primary conductor at a tap behind the summation converter and the return conductor at a tap before the summation converter can be established via a pushbutton in the primary circuit via a resistor, and in this way a fault current can be simulated because the current flow bypasses the current transformer like a fault current.
  • the current transformers should also be checked, so far only the use of a separate test device, for example in the form of a continuity tester. The device can only be operated by a specialist and only when the main conductor to be monitored is taken out of operation.
  • US Pat. No. 4,634,981 proposes a method and a device for use in testing a circuit breaker, in which the circuit breaker has at least one current sensor, such as a current transformer, a tripping circuit and a disconnecting device.
  • a low-voltage alternating current source is provided and furthermore a device for generating an alternating current signal, the device for generating the alternating current signal being able to vary the level of the voltage of the alternating current signal.
  • the low voltage AC power source is connected to the device for generating the
  • AC signal connected and the device for generating the AC signal is connected to the current sensor, that is, the current transformer of the circuit breaker.
  • An alternating current signal is applied to the current sensor and the amount of current in the alternating current signal is displayed.
  • the level of the current in the AC signal and the state of the isolating device in the circuit breaker are compared with a predetermined level of the alternating current, at which the isolating device in the circuit breaker would be brought into an open state under perfect working conditions in order to obtain an indication of the condition of the circuit breaker.
  • a device is used for testing a circuit breaker, which is used for a connection fertilizer with a low-voltage alternating current source and with a current sensor, such as a current transformer in the circuit breaker, is suitable.
  • Such a device for carrying out such a function test is also known from US Pat. No. 4,761,704. It consists in the fact that a further bridge circuit is connected in parallel to a bridge circuit downstream of the secondary windings of the current transformers, which provides the direct current for the electronic trip circuit. An external current can be fed in via this further bridge circuit, with which the electronics of the release circuit, the release coil and the switch drive can be checked. If the trigger circuit can also be supplied externally, for example via a 24 V supply, the function test can also be carried out without the MAIN LADDER to be monitored carrying current. This means that the function test can be carried out when the switch is installed before the main conductors are even switched on. The test can be carried out with an additional DC or AC voltage source. It is disadvantageous that the test does not also detect the function of the current transformers and their connection to the release.
  • US Pat. No. 4,814,712 proposes a transportable test device for a circuit breaker which has an electronic release.
  • the test facility determines the rating and response of the circuit breaker to an overcurrent when it is connected to the electrical power circuit.
  • the test facility simulates an overcurrent condition and provides proof that the circuit breaker has responded, without having to open the circuit breaker or the protective functions of the circuit breaker.
  • US Pat. No. 5,272,438 describes a further portable test device for a circuit breaker with an electronic trip device, which has a ribbon cable with a connecting plug in order to establish a connection to a plug base of the trip device.
  • the test facility has a parallel connector into which a data connector of the circuit breaker can be inserted.
  • a battery is included as an energy source and a battery error LED is activated when the battery voltage drops below a certain level.
  • a voltage regulator and a variety of voltage dividers provide reference test voltages for application to the circuit breaker trip via the connectors and cables.
  • a pair of resistors is connected across the cable and connectors to rapidly discharge the switch memory after each test.
  • US Pat. No. 5,444,377 describes an electronic trigger device in which the terminals of a test circuit are connected directly to the outputs of the secondary windings of the current transformer and to the input of the rectifier circuit, so that the test current checks the operation of the trigger.
  • a circuit for displaying the polarity feeds a processor circuit with the values of the polarities of the rectified currents.
  • the processor circuit has means for determining the presence of a test current if the polarity of the rectified current including the test current continues to have the same polarity. Differentiating the continuous polarity, positive or negative, of the test current enables the test to be performed with or without earth-fault protection can be carried out. All of these test devices have a high outlay in terms of circuit technology and thus production technology.
  • DE-OS 199 25 963 AI describes a test device for a low-voltage circuit breaker with an electronic trigger circuit and at least one associated current transformer, in which the current transformer (s) is / are provided with an auxiliary winding which can be subjected to an external alternating current during a function test is / are.
  • a tone-frequency voltage generator is required to provide the external alternating current, and the trigger circuit must be set up and programmed frequency-selectively to detect the frequency provided by the voltage generator. But that means a relatively high effort.
  • the invention is based on the object of creating a possibility with which a functional test of the circuit breaker, including the current transformers and their connections, can take place at any time, without the expense of a fully equipped test or test field, without special components such as Current transformers with auxiliary windings are required.
  • test current source is a non-stabilized current source and the test device contains the following function groups: a device for current measurement, a device for calculating the expected tripping time, a device for measuring the delay, a device for comparing the expected tripping time with the actual delay, a device for setting and a display device.
  • the device for current measurement is on the input side to a
  • Test power source is connected and its output is connected to the device for calculating the expected tripping time and the device for measuring the delay, which is connected to a circuit breaker to be tested with a second input and with a first input of the display device and with its first output its second output is connected to a first input of the device for comparing the expected tripping time with the actual delay.
  • the device for calculating the expected tripping time is connected to the device for setting with a second input and its first output is connected to a second input of the device for comparing the expected tripping time with the actual delay, and with its second output to a second input of the display device, which is connected with a third input to an output of the device for comparing the expected triggering time with the actual delay.
  • test device can also have an input for the measurement current if it is supplied from the outside.
  • the measurement current supplied from outside can be a current-proportional measurement signal obtained from a current transformer.
  • a non-stabilized current source can advantageously be an
  • Short-circuit operated power transformer can be provided. If you limit yourself to just feeding in the electricity, because the power is not required, the transformer does not have to be too big and heavy, in any case it is portable.
  • the output current can fluctuate depending on the resistance.
  • the test device detects the actual current curve flowing during the test and uses this to calculate the expected time delay with the associated tolerance band. It determines whether the actual deceleration is within this tolerance band and displays the measured and calculated deceleration value. This means that the test power source does not have to meet high requirements because its faultiness is measured and an average over time is determined, which corresponds to a certain effective current. Then the tester also makes a comparison with the trip curve, with the one that the trip should actually have. Not with the one that he actually has, but with the one that he is supposed to have prescribed by the manufacturer in his data sheet and uses this to calculate the delay time that he should have.
  • This test setup thus enables a good functional test that says a lot more than if only the switch was triggered at all or not.
  • test facility Since it is generally possible to influence the tripping times, for example when transitioning from different sections of the tripping characteristic, with harmonics and also with frequency deviations, the test facility should have a typical evaluation algorithm for this, which is changed when testing different types of triggers. It can also be useful to provide an evaluation algorithm that results from the international regulations.
  • Fig. 1 shows schematically the basic structure of a low-voltage circuit breaker in section.
  • FIG. 2 shows a block diagram for a preferred embodiment of the test arrangement according to the invention.
  • Fig. 1 the basic structure of a low-voltage circuit breaker 1 is shown schematically in section.
  • the upper connection rail 3 and the lower connection rail 4 are passed through the rear wall 2 of the low-voltage circuit breaker 1.
  • the fixed switching contact 5 is located on the upper connecting bar 3 and the movable switching contact 8 located on a contact carrier 7 is located on the lower connecting bar 4 via flexible connections 6 connected.
  • the arc quenching chamber 9 is arranged above the fixed switch contact 5 and the movable switch contact 8.
  • the switch drive 10 there is the selector shaft 11 with the selector shaft extension 12, which together with the coupling plate 13 forms the connection of the selector shaft 11 to the contact carrier 7.
  • the trigger 14 is located above the switch drive 10 and is connected to the converter 16 on the lower connecting rail 4 of the low-voltage circuit breaker 1 via a measuring line 15.
  • a test current source 17 supplies a test current for the circuit breaker 18 to be tested and the test device 19.
  • a device for current measurement 20 contained therein carries out an independent measurement of the flowing test current and a device for calculating the expected tripping time 21 calculates the same for that of the test current measured by the device for current measurement 20 and forwards the value to a device for comparing the expected tripping time with the actual delay 22.
  • This actual delay is determined by a device for measuring the delay 23 which receives the data required for this from the circuit breaker 18 to be tested and the device for current measurement 20 are supplied.
  • the desired evaluation algorithm is entered by means of a setting device 24.
  • the determined values can be read on a display device 25.
  • the two expected times are also displayed.
  • test current source that emits a constant current is practically not possible at the location of a circuit breaker.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Breakers (AREA)

Abstract

L'invention concerne un dispositif de contrôle comportant une source de courant non stabilisée. Ledit dispositif de contrôle est composé d'un système de mesure du courant (20), d'un système de calcul de la durée de déclenchement prévisible (21), d'un système de mesure du retard (23), d'un système de comparaison de la durée de déclenchement prévisible et du retard réel (22), d'un système de réglage (24) et d'un système d'affichage (25).
PCT/DE2003/000711 2002-02-28 2003-02-25 Dispositif de controle destine a un disjoncteur comportant un declencheur electronique WO2003073577A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10209066 2002-02-28
DE10209066.1 2002-02-28

Publications (1)

Publication Number Publication Date
WO2003073577A1 true WO2003073577A1 (fr) 2003-09-04

Family

ID=27762577

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2003/000711 WO2003073577A1 (fr) 2002-02-28 2003-02-25 Dispositif de controle destine a un disjoncteur comportant un declencheur electronique

Country Status (1)

Country Link
WO (1) WO2003073577A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102944785A (zh) * 2012-11-12 2013-02-27 镇江市松协电器有限公司 定时器导电片检测机
DE102011083710A1 (de) * 2011-09-29 2013-04-04 Siemens Aktiengesellschaft Prüfmittel für einen Schalter, insbesondere Leistungsschalter für Niederspannungen
CN105388418A (zh) * 2015-12-22 2016-03-09 苏州工业园区海沃科技有限公司 基于互感器励磁特征的断路器动作时间测试装置及其方法
US9368955B2 (en) 2013-02-14 2016-06-14 General Electric Company System and method to derive power and trip a circuit breaker from an external device
CN106885983A (zh) * 2015-12-15 2017-06-23 江苏德春电力科技股份有限公司 断路器机械特性在线监测装置
EP3416254A1 (fr) * 2017-06-14 2018-12-19 ABB Schweiz AG Dispositif de protection électronique
CN114460455A (zh) * 2022-03-04 2022-05-10 国网河北省电力有限公司雄安新区供电公司 低压直流断路器的电磁脱扣器脱扣能力检测装置及方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5642052A (en) * 1995-06-05 1997-06-24 Etcon Corporation Hand-held tester for receptacle ground fault circuit interrupters

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5642052A (en) * 1995-06-05 1997-06-24 Etcon Corporation Hand-held tester for receptacle ground fault circuit interrupters

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011083710A1 (de) * 2011-09-29 2013-04-04 Siemens Aktiengesellschaft Prüfmittel für einen Schalter, insbesondere Leistungsschalter für Niederspannungen
DE102011083710B4 (de) * 2011-09-29 2014-02-13 Siemens Aktiengesellschaft Prüfmittel für einen Schalter, insbesondere Leistungsschalter für Niederspannungen
CN102944785A (zh) * 2012-11-12 2013-02-27 镇江市松协电器有限公司 定时器导电片检测机
US9368955B2 (en) 2013-02-14 2016-06-14 General Electric Company System and method to derive power and trip a circuit breaker from an external device
CN106885983A (zh) * 2015-12-15 2017-06-23 江苏德春电力科技股份有限公司 断路器机械特性在线监测装置
CN106885983B (zh) * 2015-12-15 2020-11-06 江苏德春电力科技股份有限公司 断路器机械特性在线监测装置
CN105388418A (zh) * 2015-12-22 2016-03-09 苏州工业园区海沃科技有限公司 基于互感器励磁特征的断路器动作时间测试装置及其方法
EP3416254A1 (fr) * 2017-06-14 2018-12-19 ABB Schweiz AG Dispositif de protection électronique
US10923900B2 (en) 2017-06-14 2021-02-16 Abb Schweiz Ag Low voltage protection device with clock testing
CN114460455A (zh) * 2022-03-04 2022-05-10 国网河北省电力有限公司雄安新区供电公司 低压直流断路器的电磁脱扣器脱扣能力检测装置及方法

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