KR101773433B1 - The dual-type automatic test equipment for air circuit breakers - Google Patents

Abstract

The present invention relates to a dual type-automatic test apparatus for an air circuit breaker, which increases probability of detection of a fault of a circuit breaker, thereby preventing a serious accident and stopping of an operation of a power supply system, which can occur due to a fault of the circuit breaker. The dual-type automatic test apparatus for an air circuit breaker comprises: an over current relay (OCR) adjustment part coupled to an OCR of each circuit breaker and automatically testing the circuit breaker by adjusting the OCR under the control of the control part; a control part controlling the OCR adjustment part and cradles with a control signal; a micro-resistance measurement part connected to the cradles to measure a contact resistance of a main circuit of the circuit breaker; a chattering countering part connected to the cradles to measure chattering occurring when main circuits of circuit breakers positioned at the cradles are opened/closed; an insulation resistance measuring part measuring terminal insulation performance of each cradle; a DC power part supplying variable DC power of 1V-130V to the cradles; and an AC power supply part supplying variable AC power of 1A to 100A to the OCR; a plurality of relays performing switching; a control part controlling the cradles, the OCR adjustment part, and the relays by the control signal; a terminal part performing a control operation using the control signal; and an output part outputting information on each situation of the terminal part and devices subordinately connected to the terminal part to be checked.

Description

[0001] The present invention relates to a dual-type automatic test equipment for air circuit breakers,

The present invention relates to a dual type automatic test apparatus for testing the integrity of an air conditioner and an air conditioner for automatically shutting off electric power when a danger occurs in a generator supplying electric power, and two test apparatuses are equipped with two breaker cradles It is equipped with two air circuit breakers to prevent accidents caused by defective air circuit breakers before or during the use of circuit breaker and OCR in order to improve the accuracy and convenience of the conventional test equipment. The present invention relates to a dual type automatic test apparatus for an air circuit breaker including an improvement.

In general, to test a conventional circuit breaker, each test item is measured and tested using each individual device corresponding to the circuit breaker test item, which is disadvantageous in that it takes a lot of time and manpower. In order to evaluate the OCR (over current relay) performance, the OCR equipment was separated and tested by supplying AC current to each person one by one at a short time or at an instant.

In addition, since the chattering counter of the existing test equipments measures chattering occurring at the breaker opening / closing test only 1000 times per second, it can not accurately measure the chattering that occurs and accurately judges the aging of the breaker I can not.

In addition, since existing test equipment does not provide a remote communication method with an external web server or a printer, it is impossible to control the test progress in real time in the absence of a supervisor or a manager in a test site, Since the communication method between the controller and the computer only provides the wired (RS-232, USB) communication method, when the problem occurs in the wired communication line before the test or during the test, the test equipment can not be operated or the test is stopped .

In addition, the test program of existing test equipments can be used individually for each test item (check for breaker contact, open / close time and chattering number of breaker opening, charging motor resistance, input coil resistance, open coil resistance, anti pump relay resistance) Because it is necessary to test using the test equipment, it takes a lot of time for the whole test and there is a disadvantage that the user is inconvenient. Since there is no function to monitor the state of the breaker (Auto Contact, MOC, TOC) during the test, Intermittent defects that can not be detected.

In addition, since existing test equipment does not have the function of checking the integrity of the test equipment itself, it is possible that the failure of the test equipment may be mistaken for the fault of the circuit breaker, which may result in a repair cost for the healthy circuit breaker. FDD, USB, etc.) must be moved to a separate computer and a separate program installed must be executed. Therefore, the test results can not be verified in real time on site.

In addition, when testing circuit breakers with existing test equipment, it is necessary to use a lot of manpower and individual equipment to test them, so that it takes a lot of manpower and time, resulting in a lot of economic loss, Errors can result in errors in the results of tests and measurements.

The prior art patent relates to a tulip-type, clip-type contact hole of a vacuum circuit breaker. Since the movable contact can be rotated in both directions while the movable contact is constrained to the outer diameter portion of the mover holder, It is possible to flexibly cope with the axial fluctuation of the biaxial terminal inserted into the tulip contactor and a spring is provided on each movable contactor to prevent the moving contactor from coming off and the overall collapse during the installation work.

This prior patent does not accurately determine the aging of the circuit breaker because it can not accurately measure the existing chattering, which is a conventional problem, and that the test equipment is operated when a problem occurs in the wired communication line before or during the test It is not possible to detect intermittent faults that may occur during the test because there is no function that can not be monitored by itself and that the stored data should be moved to a separate computer and run a separate program installed Therefore, it is difficult to confirm the test results in real time in the field, and there is a problem that a test error is caused due to errors in the handwriting due to the manual writing of the result data.

Prior Patent: Korean Patent Registration No. 10-1013688 (Jan. 31, 2011)

The present invention utilizes individual contact terminals and chattering counters with improved performance, and the safety of the test equipment due to the addition of the breaker function monitoring and self-checking function and the user convenience to test all the test items with one button operation The purpose of the present invention is to provide a dual type automatic test apparatus which can prevent large-scale safety accidents due to faulty breakers and shutdown of the power supply system by increasing the probability of detecting a faulty breaker by applying a new technology have.

According to another aspect of the present invention, there is provided a dual type automatic testing apparatus for an air circuit breaker, comprising: a cradle to which a breaker for shorting a power source can be mounted; a cradle coupled to each of the cradles, An OCR adjuster for automatically testing the breaker by adjusting an overcurrent relay (OCR) A control unit for controlling the OCR adjusting unit and the cradle with a control signal; A micro resistance measuring unit connected to the cradle to measure a contact resistance of the circuit breaker main circuit; A chattering counter connected to the cradle and measuring a chattering occurring when a main circuit of a circuit breaker provided in the cradle is opened / closed; An insulation resistance measuring unit for measuring terminal insulation performance by applying DC 1000 V to the main circuit of the circuit breaker provided in the cradle and 500 V to the control circuit; A DC power supply for supplying a variable DC power from 1 V to 130 V to the cradle; An AC power source for supplying variable AC power from 1 A to 100 A to the overcurrent relay; A plurality of relays connected between the control unit and the OCR adjusting unit, the control unit and the cradle, the micro resistance measuring unit and the cradle, the chattering counter unit and the cradle, the insulation resistance measuring unit and the cradle, the DC power source unit and the cradle, and the AC power source unit and the cradle. A control unit for controlling the cradle, the OCR adjusting unit, and the relay with a control signal; A terminal unit connected to the control unit, the micro resistance measurement unit, the chattering counter unit, the insulation resistance measurement unit, the DC power unit, and the AC power unit, A web server connected to the terminal unit through the Internet or wireless communication and capable of verifying the status of the terminal unit and the slave unit at a remote location and being capable of remotely controlling the terminal unit, And an output unit for outputting and confirming the status of devices connected to the lower part of the terminal unit, the cradle breaker and the overcurrent relay, which are automatically connected to each other through the control of the terminal unit, can be tested according to each test item And can be tested and displayed remotely through a web server connected to the terminal unit.

Specifically, each of the breakers is controlled by a control signal of the control unit so that the breakers can be separately tested and simultaneously tested.

The OCR adjuster includes a drive for automatically adjusting the dial of the overcurrent relay to be manually adjusted, an optical sensor for detecting the emitted light and transmitting the light to the terminal, a push switch or a solenoid switch for pressing the switch, and an overcurrent relay and an OCR adjusting unit So that it can be used as a support.

The communication between the control unit, the micro resistance measurement unit, the chattering counter unit, the insulation resistance measurement unit, the DC power supply unit, and the AC power supply unit and the terminal unit is connected by wired or wireless communication, and wired communication and wireless communication are selectively connected Thereby preventing a test stop due to a communication error.

The test items are the minimum operating voltage, the control resistance of the control circuit, the resistance of the recharging relay, the charging motor resistance, the trip coil and the input coil resistance, the open / close time and chattering measurement of each phase, (OCR) performance evaluation.

The test items can be arbitrarily executed individually through the terminal unit, only selected items can be simultaneously executed, or all test items can be simultaneously selected and executed by one-click.

The present invention can test a breaker and an overcurrent relay of a cradle that are automatically connected to each other through control of a terminal unit according to each test item and can test and display remotely through a web server connected to the terminal unit have.

In addition, it supports remote communication method that connects test equipment with external web server and printer via wired / wireless (Ethernet, Wi-Fi), so that test progress can be controlled in real time even in absence of supervisor and manager in test site. It can be checked in real time by outputting it through a printer or a web server, and even if a problem occurs in the wired communication, it is automatically switched to the wireless communication, so that the possibility of shutting down the test equipment due to the problem of the wired communication line can be prevented.

In addition, by providing accurate chattering data (measured value) by measuring chattering occurring at the time of opening and closing test of circuit breaker main circuit more than 500,000 times per second, accurate cycle breaker replacement cycle can be known, There is an effect that can be done.

In addition, the one-click automatic test method shortens the test time of the circuit breaker to reduce the possibility of accident caused by the circuit breaker member for the test, and the status of the circuit breaker can be checked in real time by monitoring the circuit breaker function. It is effective to prevent accidents.

In addition, by using the self-checking function of the test equipment, it is possible to prevent the unnecessary repairs of the sound breaker by preventing the possibility of misjudging the test equipment due to the defect of the circuit breaker in advance, By displaying and storing and providing history management functions such as inquiry of existing test results, it is possible to significantly reduce the time from test to result confirmation, and it is possible to prevent a defect from being managed through history management.

In addition, since the circuit breaker can be mounted on two test equipments at the same time, it can be tested in real time. Therefore, it is effective to increase the efficiency of circuit breaker testing and test only by replacing the cradle in the test equipment when the circuit breaker model to be tested is different.

In addition, it can be a single type automatic test equipment of the air circuit breaker by constituting only one cradle according to the case, and it is possible to test the circuit breaker of other model in real time by replacing the cradle.

1 is a diagram showing the overall configuration of a dual type automatic test apparatus for air circuit breaker according to an embodiment of the present invention.
FIG. 2 is a diagram showing an OCR adjusting unit for automatically testing an overcurrent relay of a dual type automatic test apparatus of an air circuit breaker according to the present invention.
FIG. 3 is a diagram illustrating the connection of a chattering counter unit and a circuit breaker of a dual type automatic test apparatus of an air circuit breaker according to the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the particular forms disclosed. And shall not interpret it.

FIG. 1 is a diagram showing the overall configuration of a dual type automatic testing apparatus according to an embodiment of the present invention. In FIG. 1, a cradle 110 to which a circuit breaker can be mounted is composed of a dual type and a cradle 110 An OCR adjuster 130 coupled to the overcurrent relay 120 of the circuit breaker 120 for controlling the overcurrent relay 120 through the control of the controller 40 and the OCR adjuster 130 and the cradle 110 A micro resistance measuring unit 50 connected to the cradle 110 to measure a micro resistance of the cradle 110 and a micro resistance measuring unit 50 connected to the cradle 110, An insulation resistance measuring unit 70 for measuring a terminal insulation performance of a circuit breaker provided in the cradle 110, a DC power supply unit for supplying variable DC power to the cradle 110, An AC power supply for supplying variable AC power to the cradle 110 A control unit 40 and a cradle 110, a micro resistance measuring unit 50 and a cradle 110, a chattering counter unit 60 and a cradle 110, A plurality of relays 100, a cradle 110 and an OCR adjuster 130, which are connected and switched between the cradle 110 and the cradle 110, the DC power supply and the cradle 110, and the AC power supply and the cradle 110, A control unit 40 for controlling the relay 100 as a control signal, a control unit 40, a micro resistance measurement unit 50, a chattering counter unit 60, an insulation resistance measurement unit 70, a DC power supply unit, The terminal unit 30 can be connected to the terminal unit 30 and the terminal unit 30 by the Internet or wireless communication to check the status of the terminal unit 30 and the slave unit at a remote location, A web server 10 and a terminal unit 30 which can remotely control the terminal unit 30 and the terminal unit 30 30), and an output unit for outputting and checking the status of the devices connected to the lower unit.

The cradle 110 is coupled to a circuit breaker installed inside the building to perform an operation test and performance test of the circuit breaker.

The cradle 110 is connected to the control unit 40. The cradle 110 is connected to the first breaker 111 and the second breaker 112 and the overcurrent relay 120 is connected to the breaker 110. [ Respectively.

The cradle 110 may be controlled by the control unit 40 to control the relay 100 so that the breakers 111 and 112 can be separately tested or simultaneously tested

Thus, the operation and characteristics of the first circuit breaker 111 and the second circuit breaker 112 mounted on each cradle 110 can be tested.

The overcurrent relay 120 is connected to the front panel of the overcurrent relay 120 so that the OCR adjuster 130 can automatically operate the overcurrent relay 120 which can be manually controlled, So that the operation of the overcurrent relay 120 can be automatically controlled.

The overcurrent relay 120 is a device that has a function of automatically controlling and controlling the device to protect the device when the current flows above a predetermined value, or a current flowing through a relay during an operation period is set Is a device that operates when it is above a certain value.

The overcurrent relay 120 is required to check whether the overcurrent relay 120 is in the normal state, short-time state, and instantaneous state. To this end, the OCR adjuster 130 is coupled to the front of the operation panel of the overcurrent relay 120, So that the respective switches and dials of the overcurrent relay 120 can be adjusted.

The OCR adjusting unit 130 coupled to the overcurrent relay 120 detects a LED light which is turned on and off in the non-state and the original state when the long, short, and momentary tests are performed. A push switch or a solenoid switch for pressing a test switch and a reset switch, and a fixing member for coupling the overcurrent relay 120 and the OCR adjusting unit 130 to each other.

The drive of the OCR adjuster 130 is used to turn on the LTD, STD, and INST / MCR dials, and the spring behind the drive serves as a buffer.

The optical sensor recognizes that the PTA, LTD, GFT, STD, and INS / MCR LEDs of the LED area are turned on or off, and the push switch or solenoid switch is used when the test switch and the reset switch are pressed.

The fixture is used to fix the OCR to the OCR automatic test equipment when the power connector is connected to the test power input of the OCR.

The OCR adjuster 130 is operated and driven according to a command of the controller 40 according to an OCR characteristic test procedure in an integrated program that is built in and executed in the terminal unit 30 and can be protected from an overcurrent Design and manufacture.

The control unit 40 controls the first and second breakers 112 and the OCR adjusting unit 130 of each cradle 110 through the control signal of the terminal unit 30 to control the test items of the terminal unit 30 Let it work together.

A plurality of relays 100 are coupled between the control unit 40 and the first and second breakers 111 and 112 and the OCR adjuster 130 of the cradle 110, The controller 40 controls the plurality of relays 100 to control the operation of the first and second breakers 111 and 112 and the OCR adjuster 130 of each cradle 110 respectively, Thereby preventing the first and second circuit breakers 111 and 112 and the OCR adjusting unit 130 from being damaged.

The relay 100 is connected in series as one or more modules and includes a micro resistance measuring unit 50, a chattering counter unit 60, an insulation resistance measuring unit 70, a DC power supply unit and an AC power supply unit and a cradle 110 and the OCR adjuster 130, respectively.

The control unit 40 controls the micro resistance measurement unit 50 and the chattering counter unit 60 according to the test items of the terminal unit 30. The control unit 40 controls the operation of the relay 100, The insulation resistance measuring unit 70, the DC power supply unit, and the AC power supply unit may be connected to the cradle 110 and the OCR adjusting unit 130. [

The micro resistance measuring unit 50 measures the resistances generated by the first and second circuit breakers 111 and 112 of the cradle 110.

The resistor includes a re-trip prevention relay, an anti-pump relay 100 resistance, a charging motor resistance, a trip coil, and an input coil resistance provided in the cradle 110 and the first and second circuit breakers 111 and 112.

The chattering counter 60 measures the opening and closing times and chattering when the main circuit of the first and second circuit breakers 111 and 112 of the cradle 110 is opened and closed so that the short circuit performance of the first and second circuit breakers 111 and 112 .

The chattering counter 60 can measure the chattering generated from the breaker 1 to 500,000 times per second, and can measure 500,000 times or more as needed.

At this time, the short circuit performance test result of the chattering counter unit 60 to be tested is stored and displayed in the terminal unit 30, and is transmitted to the web server 10 and the printer 20 via the Internet or wireless communication and displayed .

The insulation resistance measuring unit 70 measures the insulation resistance among the main circuit terminals of the first and second circuit breakers 111 and 112, the ground, and the air in the control circuit.

The DC power supply supplies DC power to the cradle 110, and the AC power supply supplies AC power to the test terminal of the overcurrent relay 120.

The communication between the control unit 40, the micro resistance measurement unit 50, the chattering counter unit 60, the insulation resistance measurement unit 70, the DC power supply unit and the AC power supply unit and the terminal unit 30 is performed by a wired or wireless communication And the wired communication and the wireless communication are selectively connected or simultaneously connected to prevent the test stop due to the communication error.

The terminal unit 30 selects a test item and transmits a control signal to the control unit 40 so as to control the lower apparatuses. The terminal unit 30 includes a program for storing and displaying the measurement result according to the test item The display body, the input body, and the body are provided so that the test items, the test results, and the control status can be inputted through the display and the input body.

The terminal unit 30 transmits and displays the items to be tested, the results of the test conditions, the measurement data, and the graphs to the web server 10 via the Internet or wireless communication, and transmits the results to the printer 20 for output. do.

As a result, it is possible to check the current test state in real time, and if a problem occurs in the test apparatus, it is possible to immediately check if a trouble has occurred in the first circuit breaker 111 or the second circuit breaker 112, .

The test apparatus includes a terminal unit 30, a control unit 40, a micro resistance measurement unit 50, a chattering counter unit 60, an insulation resistance measurement unit 70, a DC power supply unit, an AC power supply unit, an OCR adjustment unit 130) and a plurality of relays (100).

Such a test apparatus is capable of self-testing of each apparatus, so that it is possible to check whether the test apparatus itself is normal, so that the error probability when the test is performed regardless of whether the cradle 110 or the first and second circuit breakers 111, The life of the cradle 110 or the first and second circuit breakers 112 can be prolonged.

Also, the terminal unit 30 may be operated at a remote site through the web server 10 to conduct the test.

The test items to be performed in the terminal unit 30 include a minimum operating voltage, a relay resistance for re-closing the control circuit, a charging motor resistance, a trip coil and an input coil resistance measurement, a chattering measurement for each phase, And an overcurrent relay 120 (OCR) performance evaluation.

The test items can be arbitrarily executed individually through a program built in the terminal unit 30, and can be executed simultaneously by selecting only the selected items or by simultaneously selecting all the test items by one-click.

According to the present invention configured as described above, it is possible to test the breaker and the overcurrent relay of the cradle, which are automatically connected to each other through the control of the terminal unit, according to each test item, and to test and display them remotely through a web server connected to the terminal unit There is an effect.

In addition, it supports remote communication method that connects test equipment with external web server and printer via wired / wireless (Ethernet, Wi-Fi), so that test progress can be controlled in real time even in absence of supervisor and manager in test site. It can be checked in real time by outputting it through a printer or a web server, and even if a problem occurs in the wired communication, it is automatically switched to the wireless communication, so that the possibility of shutting down the test equipment due to the problem of the wired communication line can be prevented.

In addition, accurate chattering data (measured value) can be obtained by measuring chattering occurring at the time of opening and closing of circuit breaker main circuit more than 500,000 times per second, so that it is possible to know precise breaker replacement cycle, There is an effect that can be.

In addition, the one-click automatic test method shortens the test time of the circuit breaker to reduce the possibility of accident caused by the circuit breaker member for the test, and the status of the circuit breaker can be checked in real time by monitoring the circuit breaker function. It is effective to prevent accidents.

In addition, by using the self-checking function of the test equipment, it is possible to prevent the unnecessary repairs of the sound breaker by preventing the possibility of misjudging the test equipment due to the defect of the circuit breaker in advance, By displaying and saving the existing test results, it is possible to significantly reduce the time from test to confirmation of results, and it is possible to prevent prior defects through history management.

In addition, it is possible to test in real time by attaching the circuit breaker to two test equipments at the same time, to improve the efficiency of circuit breaker test, and to test the circuit breaker in different models by replacing the cradle in the test equipment. By connecting the wires of the test equipment to the contacts and terminals, it is possible to test the performance of two or more, or different kinds of circuit breakers with different models, and OCR operation test.

In addition, it can be a single type automatic test equipment by constituting only one cradle according to the case, and it is possible to test the breaker of other model in real time by replacing the cradle, and it is possible to test one or more of the breakers By connecting the lines of the test equipment, it is possible to test the performance of one or more or different kinds of circuit breakers different in model and OCR operation test.

The dual type automatic test apparatus for air circuit breaker as described above is not limited to the configuration and the operation manner of the embodiments described above. The embodiments may be configured so that all or some of the embodiments may be selectively combined so that various modifications may be made.

T: Test equipment
10: Web server 20: Printer
30: terminal unit 40:
50: micro resistance measuring unit 60: chattering counter unit
70: insulation resistance measuring unit 80: DC power supply unit
90: AC power supply unit 100: Relay
110: cradle 111: first breaker
112: second breaker
120: overcurrent relay 130: OCR adjuster

Claims (6)

A cradle 110 to which a breaker for short-circuiting the power supply can be mounted is connected to the front of the operation panel of the overcurrent relay 120 of each circuit breaker coupled to the cradle 110, An OCR adjuster 130 for automatically testing an overcurrent relay 120 through an overcurrent relay 120;
A micro resistance measuring unit 50 connected to the cradle 110 to measure a contact resistance of the circuit breaker main circuit;
A chattering counter 60 connected to the cradle 110 to measure chattering occurring when a main circuit of the circuit breaker installed in the cradle 110 is opened / closed;
An insulation resistance measuring unit 70 for measuring terminal insulation performance by applying DC 1000 V to the main circuit of the circuit breaker provided in the cradle 110 and 500 V to the control circuit;
A DC power source 80 for supplying a variable DC power from 1 V to 130 V to the cradle 110;
An AC power source 90 for supplying variable AC power from 1 A to 100 A to the overcurrent relay 120 through the OCR adjuster;
The control unit 40 and the cradle 110, the micro resistance measuring unit 50 and the cradle 110, the chattering counter unit 60 and the cradle 110, the insulation resistance measuring unit A plurality of relays 100 connected between the cradle 110 and the DC power source 80 and the cradle 110 and between the AC power source 90 and the cradle 110;
A control unit (40) for controlling the cradle (110), the OCR adjusting unit (130) and the relay (100) with control signals;
The control unit 40 is connected to the micro resistance measurement unit 50, the chattering counter unit 60, the insulation resistance measurement unit 70, the DC power supply unit 80, and the AC power supply unit 90, (30);
A web server 10 connected to the terminal unit 30 via the Internet or wireless communication and capable of checking the status of the terminal unit 30 and the slave unit at a remote location and capable of remotely controlling the terminal unit 30,
And an output unit connected to the terminal unit 30 through the Internet or wireless communication and capable of outputting and checking the status of devices connected to the terminal unit 30 and the terminal unit 30,
It is possible to test the breaker and the overcurrent relay 120 of the cradle 110 which are automatically connected in dual through the control of the terminal unit 30 according to the respective test items and the web server 10) and can be tested and displayed remotely,
The OCR adjuster 130 is a drive that automatically turns the LTD, STD, and INST / MCR dials to the non-state and the original state at the time of short-time and instantaneous testing of the overcurrent relay 120 to be manually adjusted, A push switch or a solenoid switch and an overcurrent relay 120 for pressing a test switch and a reset switch, an optical sensor for detecting light that is turned on or off on the GFT, STD, INS / MCR LED, And the OCR adjusting unit 130 are coupled and fixed,
The breakers 111 and 112 may be controlled by the control signal of the controller 40 so that the breakers 111 and 112 and the overcurrent relay 120 may be tested simultaneously. Air type circuit breaker dual type automatic test equipment.
delete delete The method according to claim 1,
The communication between the control unit 40, the micro resistance measurement unit 50, the chattering counter unit 60, the insulation resistance measurement unit 70, the DC power supply unit 80, and the AC power supply unit 90, Wherein the wired or wireless communication is connected by wired or wireless communication, and the wired communication and the wireless communication are selectively connected or simultaneously connected to prevent a test stop due to a communication error.
The method according to claim 1,
The test items are the minimum operating voltage, the control resistance of the control circuit, the resistance of the recharging relay, the charging motor resistance, the trip coil and the input coil resistance, the open / close time and chattering measurement of each phase, (120) (OCR) performance evaluation.
6. The method of claim 5,
Wherein the test items can be executed arbitrarily through the terminal unit (30), selected only at the same time, or all test items can be simultaneously selected and executed by one-click.

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