CN106646209B - Intelligent testing equipment for high-temperature and low-temperature tripping of charge control circuit breaker - Google Patents
Intelligent testing equipment for high-temperature and low-temperature tripping of charge control circuit breaker Download PDFInfo
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- CN106646209B CN106646209B CN201610928633.8A CN201610928633A CN106646209B CN 106646209 B CN106646209 B CN 106646209B CN 201610928633 A CN201610928633 A CN 201610928633A CN 106646209 B CN106646209 B CN 106646209B
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- 238000012360 testing method Methods 0.000 title claims abstract description 271
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
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- 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
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
Abstract
The invention discloses intelligent testing equipment for high-temperature and low-temperature tripping of a charge control circuit breaker, and belongs to the technical field of testing devices. The invention solves the problems of the prior standard characteristic test bed that the test function is scattered, the integration level is low, the uncoordinated defect exists in the test system, and the like, improves the efficiency and the precision of the tripping test work of the circuit breaker, and provides a touchable man-machine interaction interface. The invention comprises a control cabinet and a wiring cabinet, wherein the wiring cabinet comprises a station fixture, a standard test wire, a temperature sensor and a temperature sensing wire; the control part comprises a test unit, an industrial computer, a touch screen, a start-stop button and a test power supply. The test unit comprises a protection switch, a current booster, a mutual inductor, a constant current source, a timer, a voltage power consumption acquisition module and a multipath temperature rise inspection instrument. The invention is suitable for the tripping test of the charge control circuit breaker, and has the characteristics of easy configuration, high speed, low failure rate, simple operation and the like, and has wide market prospect.
Description
Technical Field
The invention relates to a circuit breaker tripping test device, in particular to intelligent test equipment for high-temperature and low-temperature tripping of a cost-control circuit breaker, and belongs to the technical field of test devices.
Background
The low-voltage circuit breaker is a switching device which can be used for switching on and off not only normal load current and overload current, but also short-circuit current. At any point in the closing process of the circuit breaker, if the protection action turns on the trip circuit, the circuit breaker can be reliably opened, which is called free tripping. The circuit breaker with the free tripping function can ensure that the circuit breaker can be rapidly disconnected when being closed to a short circuit fault, and the accident range is prevented from being enlarged. The tripping device types of the circuit breaker are divided into an overcurrent tripping device, an undervoltage tripping device, a shunt tripping device and the like. The low-voltage circuit breaker has certain protection tripping, such as load, short circuit, undervoltage, electric leakage and the like, besides a control function in a circuit. According to the intelligent demand of the power supply network in China, the national power grid company requires the intelligent power supply network. Therefore, a terminal executing mechanism of the power supply network, namely the charge control circuit breaker, is required to execute the upper end signal to have the tripping and closing tripping functions. Therefore, the current development trend of the low-voltage charge control circuit breaker is that the low-voltage charge control circuit breaker is provided with the traditional manual switching-on/off and the automatic overload tripping, and also needs to be provided with the electric switching-on/off and realize the remote control; particularly, the electric energy meter is combined to realize tripping functions such as automatic tripping and power-off of arrearage, automatic switching-on of charging and the like, so that higher requirements are put forward on the charge-controlled circuit breaker. At any point in the closing process, if the protection action turns on the trip circuit, the circuit breaker can reliably open, known as tripping. The circuit breaker with the tripping function can ensure that the circuit breaker can be rapidly disconnected when being closed to a short circuit fault, and the accident range is prevented from being enlarged. The tripping device types of the circuit breaker are divided into an overcurrent tripping device, an undervoltage tripping device, a shunt tripping device and the like.
In order to ensure the product quality of the circuit breaker, a standard characteristic test bed is used for detecting and checking the time-current protection characteristics of the miniature circuit breaker under the conditions of 1.13 times rated current, 1.45 times rated current and 1.45 times high time rated current of the conventional time, the conventional miniature circuit breaker standard characteristic test bed outputs test currents of all test units in parallel from a secondary through one test power supply, the switching of the test time is controlled by a time relay, and the test power supply is also arranged according to the test units, but a 50 Hz alternating current low-voltage source is generally used, and the push-pull output test current is formed by a high-power transistor. The traditional standard characteristic test bed has the problems of scattered test functions, low integration level, uncoordinated defects in a test system and the like, and has higher fault rate; because the cost control circuit breaker has the specificity of electronic and mechanical structures, the tripping characteristics of the circuit breaker can be greatly influenced under the conditions of high temperature and low temperature; meanwhile, more manual intervention is needed, and the test requirement of the modern cost-control circuit breaker is difficult to meet.
Disclosure of Invention
The invention aims to solve the technical problems of separating high-temperature and low-temperature tripping test functions of the conventional standard characteristic test bed, uncoordinated defects in a test system and the like, and simplifies operation steps.
In order to solve the technical problems, the invention provides intelligent testing equipment for high-temperature and low-temperature tripping of a charge control circuit breaker, which comprises a wiring cabinet and a control cabinet, wherein the wiring cabinet and the control cabinet are mutually independent and are connected through signal wires between the cabinets;
the wiring cabinet comprises a station fixture, a standard test wire, a temperature sensor and a temperature sensing wire; the station tooling fixture is arranged on the outer surface of the cabinet body and used for fixing the tested circuit breaker; the standard test wire is connected with the inter-cabinet signal wire and is used for sending or receiving a test signal of the tested circuit breaker; the temperature sensor is connected with the inter-cabinet signal wire through a temperature sensing wire and is used for sensing the temperature of the tested circuit breaker and sending temperature information to the control cabinet;
the control cabinet comprises a test unit, an industrial computer, a start-stop button and a test power supply;
the test unit is connected with the inter-cabinet signal line and is used for providing an electrical signal required by the tripping test of the circuit breaker;
the industrial control computer is connected with the communication module of the test unit and is used for sending a control signal to the test unit or receiving test data transmitted by the test unit;
the start-stop button is arranged on the outer surface of the control cabinet and is used for sending a start-stop instruction input by an operator to the industrial control computer;
the test power supply is connected with the test unit and is used for providing the working voltage or the working current required by the test unit.
The wiring cabinet is built and supported by the framework, and the surface of the wiring cabinet is closed through the panel.
The control cabinet is built and supported by the framework, and the surface is closed through the panel.
The control cabinet is provided with a touch screen, is arranged on the outer surface of the control cabinet and is connected with the industrial control computer; the touch screen provides an operation interface capable of inputting basic setting information through touch, the basic setting information is transmitted to the industrial control computer, and the industrial control computer displays the real-time state of the tested breaker through the touch screen.
And a programmable controller PLC is arranged in the industrial control computer.
The test unit comprises a protection switch, a current booster, a mutual inductor, a constant current source, a timer, a voltage power consumption acquisition module and a multipath temperature rise inspection instrument;
the protection switch is arranged on the outer side of the test unit and used for controlling the on-off of the whole test unit circuit and preventing the damage of the test unit or the tested circuit breaker caused by the abnormality of the test device;
the current booster is connected in parallel with the protection switch and is used for verifying the transformation ratio of the current transformer;
the mutual inductor is connected with the output end of the current booster and is used for measuring and protecting the test unit;
the first interface of the constant current source is connected with the protection switch, the second interface is connected with the current booster, the third interface is connected with the transformer, and the fourth interface is connected with the timer, the voltage power consumption acquisition module and the multipath temperature rise inspection instrument; the constant current source is used for providing basic current of each component in the test unit;
the timer is connected with a fourth interface of the constant current source and is used for recording test time;
the voltage power consumption acquisition module is connected with a fourth interface of the constant current source and is used for acquiring the power consumption of the tested breaker in the test process;
the multipath temperature rise inspection instrument is connected with a fourth interface of the constant current source and is used for recording and displaying the temperature of the tested breaker in the test process.
The test power supply consists of a variable-frequency current source, and is calibrated by setting gear, time and multiple through the industrial personal computer.
The station fixture is provided with a crimping handle.
The wiring cabinet is built by adopting the framework and the panel, so that the structural stability of the equipment is improved.
The control cabinet is built by adopting the framework and the panel, so that the structural stability of the equipment is improved.
The invention is provided with a programmable controller PLC which is loaded with a PID software control program to accelerate the test process and accurately control the frequency, amplitude and phase of the test voltage or current, thereby being beneficial to improving the test precision.
The touch screen is arranged on the control cabinet, so that the basic test setting and the real-time display of the test state are completed, the operation is convenient, and the man-machine interaction is good.
The test unit has a general structure for completing high-temperature and low-temperature tripping tests of the circuit breaker, and has good function expansibility and compatibility.
The test unit is internally provided with the protection switch, so that the on-off of the whole test unit circuit is automatically controlled, and the damage of the test unit or the tested circuit breaker caused by the abnormality of the test device is prevented.
The invention selects the variable frequency current source as the test power supply, and can select different gears, time and multiple according to test requirements, thereby being beneficial to improving test precision and enhancing compatibility of the invention.
The station fixture clamp is provided with the crimping handle, so that the tested circuit breaker can be conveniently fixed and taken out.
The invention combines the wiring cabinet and the control cabinet, has simple structure, convenient operation, higher man-machine interaction and automation degree and integrates high and low temperature tripping test functions into a whole: an instantaneous trip performance test, a short circuit trip performance test, a high temperature trip test, a low temperature trip test and the like; and support the test of different model circuit breakers, have the effect such as improvement test speed and test accuracy, protection circuit breaker that is surveyed.
Drawings
FIG. 1 is an external block diagram of a junction box of the present invention; FIG. 2 is an external structural view of the control cabinet of the present invention; FIG. 3 is a circuit diagram showing the internal structure of the test unit according to the present invention;
in the figure: 1. the device comprises a wiring cabinet, a station fixture, an insulating plate, a control cabinet, a touch screen, a start-stop button, a protection switch, an up-converter, a mutual inductor, an output end of a test unit, a constant current source, a timer, a voltage power consumption acquisition module, a multi-channel temperature rise inspection instrument and a communication module.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
Example 1:
referring to fig. 1 and 2, the embodiment mainly comprises a wiring cabinet 1 and a control cabinet 4, wherein the wiring cabinet 1 and the control cabinet 4 are two independent cabinets which are connected through a signal wire between the cabinets; the control cabinet 4 sends a test signal to the wiring cabinet 1 through an inter-cabinet signal line, and the wiring cabinet 1 sends a state signal of the tested circuit breaker to the control cabinet 4 through the inter-cabinet signal line. The cabinet body of the wiring cabinet 1 and the control cabinet 4 is built and supported by adopting an aluminum alloy profile framework, and the surface of the cabinet body is sealed by a stainless steel panel. The wiring part comprises fifteen station tool clamps 2, an insulating plate 3, fifteen standard test wires, fifteen temperature sensors and fifteen temperature sensing wires; the insulating plate 3 is arranged on the outer side panel of the wiring cabinet 1, and the station tooling fixture 2 is arranged on the insulating plate 3; the standard test lead is arranged in the insulating plate 3 and is connected with the signal wire between the cabinets; station frock clamp 2 is used for fixing the circuit breaker that is surveyed on wiring closet 1, and insulation board 3 is used for preventing the electric leakage of wiring closet 1, and standard test wire is used for with test signal transmission to the circuit breaker that is surveyed. The temperature sensor is connected with the signal wire between the cabinets through a temperature sensing wire and is used for sensing the real-time temperature of the tested circuit breaker. The control part comprises fifteen test units, an industrial computer, a touch screen 5, a start-stop button 6 and ten variable-frequency current sources. The output end 10 of one of the test units is selected to be connected with the signal line between the cabinets; the industrial control computer is connected with the communication module 15 of the test unit; the start-stop button 6 is arranged on the outer side panel of the control cabinet and is connected with the industrial computer through a start-stop signal line. One of the variable frequency current sources is selected to be connected with the test unit through a test power line, and the variable frequency current source is connected with the industrial computer through a power instruction line. The touch screen 5 is arranged on the outer side panel of the control cabinet 4 and is connected with the man-machine interface of the industrial computer. The industrial computer is internally provided with a programmable controller PLC which is loaded with a PID software control program for controlling the output of the test signal. Referring to fig. 3, each test unit is composed of an electrical device and a connecting wire thereof, and comprises a protection switch 7, a current booster 8, a mutual inductor 9, a constant current source 11, a timer 12, a voltage power consumption acquisition module 13, a multipath temperature rise inspection instrument 14 and a communication module 15. The protection switch 7 is arranged on the outer side of the test unit and used for controlling the on-off of the whole test unit circuit and preventing the damage of the test unit or the tested breaker caused by the abnormality of the test device. The current booster 8 is connected in parallel with the protection switch 7 and is used for checking the transformation ratio of the current transformer 9; the transformer 9 is connected with the output end of the current booster 8 and is used for measuring and protecting the test unit. The first interface of the constant current source 11 is connected with the protection switch 7, the second interface of the constant current source 11 is connected with the current booster 8, the third interface of the constant current source 11 is connected with the mutual inductor 9, and the fourth interface of the constant current source 11 is connected with the timer 12, the voltage power consumption acquisition module 13, the multipath temperature rise inspection instrument 14 and the communication module 15. The constant current source 11 is used for providing basic current for each component in the test unit; the timer 12 is used for recording test time; the voltage power consumption acquisition module 13 is used for acquiring the power consumption of the tested breaker in the test process; the multi-path temperature rise inspection instrument 14 is used for recording and displaying the temperature of the tested breaker in the test process. In this embodiment, all input/output interfaces use the RS-232 communication standard.
The working flow of the invention is as follows: firstly, the equipment is placed in an adjustable high-low temperature alternating temperature box with the temperature ranging from-40 ℃ to 85 ℃. Each station is connected in a parallel mode according to a 2P switch connection mode, and current between two poles of the switch adopts a serial mode. The current is introduced in a serial mode of each pole, so that the maximum 1.45 times of rated current is met; the switch is installed up and down, the lower end of the current outlet wire adopts a structure with a fixed copper contact and a silver point at the bottom, the crimping part of the end head of each copper contact is opened, and the current outlet wire is connected with a temperature sensor. According to the specification and model of the tested breaker, the station tooling fixture 2 is adjusted so that the tested breaker is just put into the testing station of the wiring cabinet 1 and is fixed by the crimping handle. Selecting a corresponding standard test wire according to the specification and model of the tested breaker, and connecting the standard test wire with a signal end of the tested breaker; and fixing the temperature sensor on the surface of the tested breaker. The operator inputs basic setting information of the test through the touch screen 5; and selecting the most suitable one from ten variable frequency current sources according to rated current and check multiple of the tested breaker, calibrating, and then setting gears, time and multiple required by the test. The industrial control computer automatically configures the internal environment according to the basic setting information sent by the touch screen 5, sets the temperature in the box to-40 ℃ and performs low-temperature tripping test of the circuit breaker. After an operator presses a start-stop button 6, a test starts, a start-stop instruction is sent to an industrial computer, and a variable frequency current source outputs a set working current to a test unit; the industrial control computer sends real-time control information to the communication module 15 of the test unit, and the test unit sends an initial minimum test signal to the tested circuit breaker. The output of a constant current source 11 in the test unit is connected with a current booster 8, and the output of the current booster 8 is changed in current through a transformer 9; the output (secondary loop) of the transformer 9 turns on the 5A current signal of the constant current source 11. The action signal of the tested breaker is transmitted to the industrial computer through a signal wire between a standard test wire and the cabinet, and the temperature information of the tested breaker is sensed by a temperature sensor and transmitted to the multipath temperature rise inspection instrument 14; the industrial control computer simultaneously displays the real-time state of the tested breaker through the touch screen 5. Under the excitation of rated current which is 1.13 times and below 1.13 times, if the tested breaker generates a tripping action signal, the current test is ended, the early trip disqualification of the tested breaker is recorded, and the test result is output through the touch screen 5. Under the excitation of rated current between 1.13 times and 1.45 times, if the tested breaker generates a tripping action signal, the tested breaker is tested to be qualified, the industrial personal computer records the current test signal and basic test information, then ends the current test, and outputs the test result through the touch screen 5. If the tested breaker does not have the tripping action signal, the industrial control computer sends new control information to the test unit, the test unit sends a next-stage test signal (the output current is increased according to a certain increment) to the tested breaker, and the steps are repeated until the tested breaker has the tripping action signal. If the test unit has increased the test signal (current) to 1.45 times of rated current and the tested breaker has no tripping action signal, the current test is ended, the 'late jump failure' of the tested breaker is recorded, and the test result is output through the touch screen 5. When the circuit breaker is in operation error caused by external factors (such as air temperature and the like) during the test, the test result should be corrected according to the actual situation. After the test is finished, the test bed automatically stores the test result into the database. The operator then repeats the example steps for the next test.
Example 2:
referring to fig. 1 and 2, the embodiment mainly comprises a wiring cabinet 1 and a control cabinet 4, wherein the wiring cabinet 1 and the control cabinet 4 are two independent cabinets which are connected through a signal wire between the cabinets; the control cabinet 4 sends a test signal to the wiring cabinet 1 through an inter-cabinet signal line, and the wiring cabinet 1 sends a state signal of the tested circuit breaker to the control cabinet 4 through the inter-cabinet signal line. The cabinet body of the wiring cabinet 1 and the control cabinet 4 is built and supported by adopting an aluminum alloy profile framework, and the surface of the cabinet body is sealed by a stainless steel panel. The wiring part comprises fifteen station tool clamps 2, an insulating plate 3, fifteen standard test wires, fifteen temperature sensors and fifteen temperature sensing wires; the insulating plate 3 is arranged on the outer side panel of the wiring cabinet 1, and the station tooling fixture 2 is arranged on the insulating plate 3; the standard test lead is arranged in the insulating plate 3 and is connected with the signal wire between the cabinets; station frock clamp 2 is used for fixing the circuit breaker that is surveyed on wiring closet 1, and insulation board 3 is used for preventing the electric leakage of wiring closet 1, and standard test wire is used for with test signal transmission to the circuit breaker that is surveyed. The temperature sensor is connected with the signal wire between the cabinets through a temperature sensing wire and is used for sensing the real-time temperature of the tested circuit breaker. The control part comprises fifteen test units, an industrial computer, a touch screen 5, a start-stop button 6 and ten variable-frequency current sources. The output end 10 of one of the test units is selected to be connected with the signal line between the cabinets; the industrial control computer is connected with the communication module 15 of the test unit; the start-stop button 6 is arranged on the outer side panel of the control cabinet and is connected with the industrial computer through a start-stop signal line. One of the variable frequency current sources is selected to be connected with the test unit through a test power line, and the variable frequency current source is connected with the industrial computer through a power instruction line. The touch screen 5 is arranged on the outer side panel of the control cabinet 4 and is connected with the man-machine interface of the industrial computer. The industrial computer is internally provided with a digital signal processor DSP, and the DSP is loaded with a PID software control program for controlling the output of the test signal. Referring to fig. 3, each test unit is composed of an electrical device and a connecting wire thereof, and comprises a protection switch 7, a current booster 8, a mutual inductor 9, a constant current source 11, a timer 12, a voltage power consumption acquisition module 13, a multipath temperature rise inspection instrument 14 and a communication module 15. The protection switch 7 is arranged on the outer side of the test unit and used for controlling the on-off of the whole test unit circuit and preventing the damage of the test unit or the tested breaker caused by the abnormality of the test device. The current booster 8 is connected in parallel with the protection switch 7 and is used for checking the transformation ratio of the current transformer 9; the transformer 9 is connected with the output end of the current booster 8 and is used for measuring and protecting the test unit. The first interface of the constant current source 11 is connected with the protection switch 7, the second interface of the constant current source 11 is connected with the current booster 8, the third interface of the constant current source 11 is connected with the mutual inductor 9, and the fourth interface of the constant current source 11 is connected with the timer 12, the voltage power consumption acquisition module 13, the multipath temperature rise inspection instrument 14 and the communication module 15. The constant current source 11 is used for providing basic current for each component in the test unit; the timer 12 is used for recording test time; the voltage power consumption acquisition module 13 is used for acquiring the power consumption of the tested breaker in the test process; the multi-path temperature rise inspection instrument 14 is used for recording and displaying the temperature of the tested breaker in the test process. In this embodiment, all input/output interfaces use the RS-485 communication standard.
The working flow of the invention is as follows: firstly, the equipment is placed in an adjustable high-low temperature alternating temperature box with the temperature ranging from-40 ℃ to 85 ℃. Each station is connected in a parallel mode according to a 2P switch connection mode, and current between two poles of the switch adopts a serial mode. The current is introduced in a serial mode of each pole, so that the maximum 1.45 times of rated current is met; the switch is installed up and down, the lower end of the current outlet wire adopts a structure with a fixed copper contact and a silver point at the bottom, the crimping part of the end head of each copper contact is opened, and the current outlet wire is connected with a temperature sensor. According to the specification and model of the tested breaker, the station tooling fixture 2 is adjusted, so that the tested breaker is just put into the testing station of the wiring cabinet 1 and is fixed through the crimping handle. Selecting a corresponding standard test wire according to the specification and model of the tested breaker, and connecting the standard test wire with a signal end of the tested breaker; and fixing the temperature sensor on the surface of the tested breaker. The operator inputs basic setting information of the test through the touch screen 5; and selecting the most suitable one from ten variable frequency current sources according to rated current and check multiple of the tested breaker, calibrating, and then setting gears, time and multiple required by the test. The industrial control computer automatically carries out corresponding configuration on the internal environment according to the basic setting information sent by the touch screen 5, sets the temperature in the box to be 85 ℃, and carries out high-temperature tripping test of the circuit breaker. After an operator presses a start-stop button 6, a test starts, a start-stop instruction is sent to an industrial computer, and a variable frequency current source outputs a set working current to a test unit; the industrial control computer sends real-time control information to the communication module 15 of the test unit, and the test unit sends an initial minimum test signal to the tested circuit breaker. The output of a constant current source 11 in the test unit is connected with a current booster 8, and the output of the current booster 8 is changed in current through a transformer 9; the output (secondary loop) of the transformer 9 turns on the 5A current signal of the constant current source 11. The action signal of the tested breaker is transmitted to the industrial computer through a signal wire between a standard test wire and the cabinet, and the temperature information of the tested breaker is sensed by a temperature sensor and transmitted to the multipath temperature rise inspection instrument 14; the industrial control computer simultaneously displays the real-time state of the tested breaker through the touch screen 5. Under the excitation of rated current which is 1.13 times and below 1.13 times, if the tested breaker generates a tripping action signal, the current test is ended, the early trip disqualification of the tested breaker is recorded, and the test result is output through the touch screen 5. Under the excitation of rated current between 1.13 times and 1.45 times, if the tested breaker generates a tripping action signal, the tested breaker is tested to be qualified, the industrial personal computer records the current test signal and basic test information, then ends the current test, and outputs the test result through the touch screen 5. If the tested breaker does not have the tripping action signal, the industrial control computer sends new control information to the test unit, the test unit sends a next-stage test signal (the output current is increased according to a certain increment) to the tested breaker, and the steps are repeated until the tested breaker has the tripping action signal. If the test unit has increased the test signal (current) to 1.45 times of rated current and the tested breaker has no tripping action signal, the current test is ended, the 'late jump failure' of the tested breaker is recorded, and the test result is output through the touch screen 5. When the circuit breaker is in operation error caused by external factors (such as air temperature and the like) during the test, the test result should be corrected according to the actual situation. After the test is finished, the test bed automatically stores the test result into the database. The operator then repeats the example steps for the next test.
Example 3:
referring to fig. 1 and 2, the embodiment mainly comprises a wiring cabinet 1 and a control cabinet 4, wherein the wiring cabinet 1 and the control cabinet 4 are two independent cabinets which are connected through a signal wire between the cabinets; the control cabinet 4 sends a test signal to the wiring cabinet 1 through an inter-cabinet signal line, and the wiring cabinet 1 sends a state signal of the tested circuit breaker to the control cabinet 4 through the inter-cabinet signal line. The cabinet body of the wiring cabinet 1 and the control cabinet 4 is built and supported by a plastic framework, and the surface of the cabinet body is sealed by a wooden panel. The wiring part comprises fifteen station tool clamps 2, fifteen standard test wires, fifteen temperature sensors and fifteen temperature sensing wires; the station tooling fixture 2 is arranged on the outer side panel of the wiring cabinet 1, and a standard test wire is connected with a signal wire between the cabinets; the station fixture 2 is used for fixing the tested circuit breaker on the wiring cabinet 1, and the standard test wire is used for transmitting a test signal to the tested circuit breaker. The temperature sensor is connected with the signal wire between the cabinets through a temperature sensing wire and is used for sensing the real-time temperature of the tested circuit breaker. The control part comprises fifteen test units, an industrial computer, a touch screen 5, a start-stop button 6 and ten variable-frequency current sources. The output end 10 of one of the test units is selected to be connected with the signal line between the cabinets; the industrial control computer is connected with the communication module 15 of the test unit; the start-stop button 6 is arranged on the outer side panel of the control cabinet and is connected with the industrial computer through a start-stop signal line. One of the variable frequency current sources is selected to be connected with the test unit through a test power line, and the variable frequency current source is connected with the industrial computer through a power instruction line. The touch screen 5 is arranged on the outer side panel of the control cabinet 4 and is connected with the man-machine interface of the industrial computer. The industrial computer is internally provided with a programmable controller PLC which is loaded with a PID software control program for controlling the output of the test signal. Referring to fig. 3, each test unit is composed of an electrical device and a connecting wire thereof, and comprises a protection switch 7, a current booster 8, a mutual inductor 9, a constant current source 11, a timer 12, a voltage power consumption acquisition module 13, a multipath temperature rise inspection instrument 14 and a communication module 15. The protection switch 7 is arranged on the outer side of the test unit and used for controlling the on-off of the whole test unit circuit and preventing the damage of the test unit or the tested breaker caused by the abnormality of the test device. The current booster 8 is connected in parallel with the protection switch 7 and is used for checking the transformation ratio of the current transformer 9; the transformer 9 is connected with the output end of the current booster 8 and is used for measuring and protecting the test unit. The first interface of the constant current source 11 is connected with the protection switch 7, the second interface of the constant current source 11 is connected with the current booster 8, the third interface of the constant current source 11 is connected with the mutual inductor 9, and the fourth interface of the constant current source 11 is connected with the timer 12, the voltage power consumption acquisition module 13, the multipath temperature rise inspection instrument 14 and the communication module 15. The constant current source 11 is used for providing basic current for each component in the test unit; the timer 12 is used for recording test time; the voltage power consumption acquisition module 13 is used for acquiring the power consumption of the tested breaker in the test process; the multi-path temperature rise inspection instrument 14 is used for recording and displaying the temperature of the tested breaker in the test process. In this embodiment, all input/output interfaces use the RS-232 communication standard.
The working flow of the invention is as follows: firstly, the equipment is placed in an adjustable high-low temperature alternating temperature box with the temperature ranging from-40 ℃ to 85 ℃. Each station is connected in a parallel mode according to a 2P switch connection mode, and current between two poles of the switch adopts a serial mode. The current is introduced in a serial mode of each pole, so that the maximum 1.45 times of rated current is met; the switch is installed up and down, the lower end of the current outlet wire adopts a structure with a fixed copper contact and a silver point at the bottom, the crimping part of the end head of each copper contact is opened, and the current outlet wire is connected with a temperature sensor. According to the specification and model of the tested breaker, the station tooling fixture 2 is adjusted so that the tested breaker is just put into the testing station of the wiring cabinet 1 and is fixed by the crimping handle. Selecting a corresponding standard test wire according to the specification and model of the tested breaker, and connecting the standard test wire with a signal end of the tested breaker; and fixing the temperature sensor on the surface of the tested breaker. The operator inputs basic setting information of the test through the touch screen 5; and selecting the most suitable one from ten variable frequency current sources according to rated current and check multiple of the tested breaker, calibrating, and then setting gears, time and multiple required by the test. The industrial control computer automatically carries out corresponding configuration on the internal environment according to the basic setting information sent by the touch screen 5, sets the temperature in the box to 25 ℃ and carries out normal-temperature tripping test of the circuit breaker. After an operator presses a start-stop button 6, a test starts, a start-stop instruction is sent to an industrial computer, and a variable frequency current source outputs a set working current to a test unit; the industrial control computer sends real-time control information to the communication module 15 of the test unit, and the test unit sends an initial minimum test signal to the tested circuit breaker. The output of a constant current source 11 in the test unit is connected with a current booster 8, and the output of the current booster 8 is changed in current through a transformer 9; the output (secondary loop) of the transformer 9 turns on the 5A current signal of the constant current source 11. The action signal of the tested breaker is transmitted to the industrial computer through a signal wire between a standard test wire and the cabinet, and the temperature information of the tested breaker is sensed by a temperature sensor and transmitted to the multipath temperature rise inspection instrument 14; the industrial control computer simultaneously displays the real-time state of the tested breaker through the touch screen 5. Under the excitation of rated current which is 1.13 times and below 1.13 times, if the tested breaker generates a tripping action signal, the current test is ended, the early trip disqualification of the tested breaker is recorded, and the test result is output through the touch screen 5. Under the excitation of rated current between 1.13 times and 1.45 times, if the tested breaker generates a tripping action signal, the tested breaker is tested to be qualified, the industrial personal computer records the current test signal and basic test information, then ends the current test, and outputs the test result through the touch screen 5. If the tested breaker does not have the tripping action signal, the industrial control computer sends new control information to the test unit, the test unit sends a next-stage test signal (the output current is increased according to a certain increment) to the tested breaker, and the steps are repeated until the tested breaker has the tripping action signal. If the test unit has increased the test signal (current) to 1.45 times of rated current and the tested breaker has no tripping action signal, the current test is ended, the 'late jump failure' of the tested breaker is recorded, and the test result is output through the touch screen 5. When the circuit breaker is in operation error caused by external factors (such as air temperature and the like) during the test, the test result should be corrected according to the actual situation. The operator then repeats the example steps for the next test.
The invention has the technical effects that: the industrial control computer adopts a programmable controller PLC and a PID software control program through preset, so that the test rate is remarkably improved; the wiring cabinet is provided with a plurality of station tool clamps, and a whole set of independent isolation power supply is adopted by the wiring cabinet, so that simultaneous testing work of circuit breakers of different specifications and types is effectively supported; setting a temperature sensor and a multipath temperature rise inspection instrument, and accurately monitoring the real-time temperature of a measured sample; setting a plurality of test units, and simultaneously completing a plurality of tripping tests of the circuit breaker; the multiple variable-frequency current sources are arranged, and different gears, times and multiples can be selected according to test requirements, so that the tripping test precision is improved, and the compatibility of the invention is enhanced. The invention is especially suitable for the tripping test of the automatic charge control circuit breaker, has the advantages of reasonable structure, good precision, low cost, high efficiency and the like, has wide market and has good economic and social benefits.
The above-described embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present invention, and are intended to be within the scope of the present invention. The protection scope of the invention is subject to the claims.
Claims (6)
1. The intelligent testing equipment for the high-temperature and low-temperature tripping of the charge control circuit breaker comprises a wiring cabinet and a control cabinet, and is characterized in that the wiring cabinet and the control cabinet are mutually independent and are connected through a signal wire between the cabinets; the wiring cabinet comprises a station fixture, a standard test wire, a temperature sensor and a temperature sensing wire; the station tooling fixture is arranged on the outer surface of the wiring cabinet body and used for fixing the tested circuit breaker; the standard test wire is connected with the inter-cabinet signal wire and is used for sending or receiving a test signal of the tested circuit breaker; the temperature sensor is connected with the inter-cabinet signal wire through a temperature sensing wire and is used for sensing the temperature of the tested circuit breaker and sending temperature information to the control cabinet; the control cabinet comprises a test unit, an industrial computer, a start-stop button and a test power supply; the test unit is connected with the inter-cabinet signal line and is used for providing an electrical signal required by the tripping test of the circuit breaker; the industrial control computer is connected with the communication module of the test unit and is used for sending a control signal to the test unit or receiving test data transmitted by the test unit; the start-stop button is arranged on the outer surface of the control cabinet and is used for sending a start-stop instruction input by an operator to the industrial control computer;
the test power supply is connected with the test unit and is used for providing working voltage or working current required by the test unit;
the wiring cabinet is built and supported by a framework, and the surface of the wiring cabinet is sealed by a panel;
the test unit comprises a protection switch, a current booster, a mutual inductor, a constant current source, a timer, a voltage power consumption acquisition module and a multipath temperature rise inspection instrument;
the protection switch is arranged at the outer side of the test unit and used for controlling the on-off of the circuit of the whole test unit and preventing the circuit from being tested
Damage to the test unit or the circuit breaker under test caused by device anomalies;
the current booster is connected in parallel with the protection switch and is used for verifying the transformation ratio of the current transformer;
the mutual inductor is connected with the output end of the current booster and is used for measuring and protecting the test unit;
the first interface of the constant current source is connected with the protection switch, the second interface is connected with the current booster, and the third interface is connected with the transformer
The fourth interface is connected with the timer, the voltage power consumption acquisition module and the multipath temperature rise inspection instrument; the constant current source is used for providing basic current of each component in the test unit;
the timer is connected with a fourth interface of the constant current source and is used for recording test time;
the voltage power consumption acquisition module is connected with a fourth interface of the constant current source and is used for measuring the power consumption of the tested breaker in the test process
Is obtained;
the multipath temperature rise inspection instrument is connected with a fourth interface of the constant current source and is used for recording the temperature of the tested breaker in the test process
Recording and displaying.
2. The intelligent testing device for high and low temperature tripping of a charge control circuit breaker according to claim 1, wherein the control cabinet is built and supported by a framework, and the surface of the control cabinet is closed by a panel.
3. The intelligent testing device for high-temperature and low-temperature tripping of the charge control circuit breaker according to claim 1, wherein the control cabinet is provided with a touch screen, is arranged on the outer surface of the control cabinet and is connected with an industrial control computer; the touch screen provides an operation interface capable of inputting basic setting information through touch, the basic setting information is transmitted to the industrial control computer, and the industrial control computer displays the real-time state of the tested breaker through the touch screen.
4. The intelligent testing device for high and low temperature tripping of the charge control circuit breaker according to claim 1, wherein a programmable controller PLC is arranged in the industrial control computer.
5. The intelligent testing device for high and low temperature tripping of the charge control circuit breaker according to claim 1, wherein the test power supply consists of a variable frequency current source, and the industrial control computer is used for setting gear, time and multiple and calibrating the test power supply.
6. The intelligent testing device for high-temperature and low-temperature tripping of a cost-controlled circuit breaker according to claim 1, wherein the station fixture is provided with a crimping handle.
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| CN108051670A (en) * | 2017-12-05 | 2018-05-18 | 深圳国创名厨商用设备制造有限公司南海分公司 | A kind of transformer testing frock |
| CN108333502B (en) * | 2018-01-15 | 2020-05-05 | 温州大学苍南研究院 | Method for measuring action temperature of miniature circuit breaker |
| CN108303643B (en) * | 2018-01-15 | 2020-05-05 | 温州大学苍南研究院 | Method for rapidly measuring thermal time constant of miniature circuit breaker |
| CN109238681A (en) * | 2018-10-17 | 2019-01-18 | 国网电力科学研究院武汉南瑞有限责任公司 | Fuse switch detection system and method |
| CN110514997B (en) * | 2019-09-10 | 2021-06-11 | 浙江华电器材检测研究所有限公司 | Detection device for detecting circuit breaker |
| CN110441682A (en) * | 2019-09-10 | 2019-11-12 | 浙江华电器材检测研究所有限公司 | A kind of one or two fusion switch test systems |
| CN113363117A (en) * | 2020-03-04 | 2021-09-07 | 南京捷泰电力设备有限公司 | Production method of miniature circuit breaker |
| CN110988671A (en) * | 2020-03-04 | 2020-04-10 | 南京捷泰电力设备有限公司 | Integrated device suitable for testing, checking and electrifying aging of miniature circuit breaker |
| CN114839527B (en) * | 2022-07-04 | 2022-09-20 | 国网辽宁省电力有限公司 | Circuit breaker detection device with power supply |
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