High-speed circuit breaker test control device
By designing a high-speed circuit breaker test control device, the problem that the existing test platform cannot achieve long-term power-on test and closed state inspection is solved, and the detection of different models of high-speed circuit breakers is realized, reducing the risk of coil overheating and improving maintenance efficiency.
Patent Information
- Application Number
- CN202420654931.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-01
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-04-01
AI Technical Summary
The existing high-speed circuit breaker test platform cannot realize long-term power-on test and closed state inspection, which can easily lead to overheating of the coil and damage to the maintenance components, and it is impossible to detect different models of high-speed circuit breakers at the same time, which increases the detection process and cost.
A high-speed circuit breaker test control device is designed, including a power control unit, a channel conversion unit, a signal control unit and a load control unit. Through these units, the voltage-regulated power supply, signal control and load feedback of the high-speed circuit breaker is realized, and the voltage-regulated power supply, signal control and load feedback of the high-speed circuit breaker is supported. Time-energy testing and small current maintain the suction state to reduce the risk of coil overheating.
It realizes long-term power-on test and closed state inspection of high-speed circuit breakers, reduces the risk of coil overheating, improves the operation time of maintenance personnel, and supports the inspection of different models of high-speed circuit breakers, reducing inspection costs and equipment requirements.
Smart Images
Figure CN222506506U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of high-speed circuit breaker testing, in particular to a high-speed circuit breaker testing control device. Background Art
[0002] At present, with different types of electric passenger cars put into production and use, the models of high-speed circuit breakers are constantly being updated. The existing high-speed circuit breaker test platform cannot realize the long-term power-on test of the high-speed circuit breaker and the inspection operation when the high-speed circuit breaker is in the closed state. The existing testing methods are prone to cause coil overheating and even damage to the maintenance components. When testing high-speed circuit breakers, only high-speed circuit breakers of the same model can be tested. If different types of high-speed circuit breakers need to be tested, multiple test platforms need to be prepared to complete the testing. This not only increases the testing procedures and processes, but also increases the purchase cost of the equipment and the equipment placement space. Utility Model Content
[0003] The purpose of the utility model is to provide a high-speed circuit breaker test control device to address the deficiencies in the prior art and to solve the problems raised in the above-mentioned background technology.
[0004] To achieve the above object, the utility model provides the following technical solutions: a high-speed circuit breaker test control device, comprising a power control unit connected to an AC220V AC power supply, the power control unit being used to provide a regulated power supply;
[0005] A channel conversion unit electrically connected to the power control unit and the load control unit;
[0006] A signal control unit is electrically connected to the power control unit and provides a low voltage to the signal control unit through the power control unit; the signal control unit is used to control the load control unit;
[0007] The load control unit is electrically connected to the power control unit, the channel conversion unit, the signal control unit and the external high-speed circuit breaker. The power control unit provides high voltage to the load control unit. The load control unit is used to feed back the power-on status of the high-speed circuit breaker.
[0008] Preferably, the power control unit includes a power-off switch E-STOP, a closed power switch QS, a fuse FR, a first power supply and a second power supply, one end of the power-off switch E-STOP is connected to the AC220V AC power supply, and the other end is electrically connected to the fuse FR, one end of the closed power switch QS is electrically connected to the fuse FR, and the other end is electrically connected to the first power supply, the other end of the first power supply is electrically connected to the AC220V AC power supply, and the first power supply is connected in parallel with the second power supply.
[0009] Preferably, the signal control unit includes switch SB4, switch SB3, relay KM3, relay KM4, time relay KT and cooling fan M, one end of the switch SB4 is electrically connected to the positive pole of the first power supply in the power control unit, and the other end is electrically connected to switch SB3, one end of the pull-in coil of the relay KM3 is electrically connected to switch SB3, and the other end is electrically connected to the first power supply in the power control unit, the normally open contact of the relay KM3 is connected in parallel with the switch SB3, the pull-in coil of the time relay KT, the pull-in coil of the relay KM3, the relay KM4 and the cooling fan M are connected in parallel with each other, and the normally open contact of the time relay KT is connected in series with the relay KM4.
[0010] Preferably, the channel conversion unit includes a mode selection switch SF, a mode selection contactor KM1 and a mode selection contactor KM2, one end of the selection switch SF is electrically connected to the second power supply, the coil of the mode selection contactor KM1 is connected in parallel with the coil of the mode selection contactor KM2 and is electrically connected to the other end of the second power supply, the normally closed contact of the mode selection contactor KM1 is connected in series with the coil of the mode selection contactor KM2, the normally closed contact of the mode selection contactor KM2 is connected in series with the coil of the mode selection contactor KM1, contact ① of the selection switch SF is connected in series with the normally closed contact of the mode selection contactor KM2, and contact ② of the selection switch SF is connected in series with the normally closed contact of the mode selection contactor KM1.
[0011] Preferably, the load control unit includes a lamp L1, a lamp NCL, a lamp NOL, an ammeter A and a current limiting resistor R, the lamp L1 is connected in parallel with the second power supply in the power control unit, the normally open contact of the relay KM3 is electrically connected to the lamp L1, one end of the normally open contact of the relay KM4 is electrically connected to the normally open contact of the relay KM3, and the other end is electrically connected to the ammeter A, the current limiting resistor R is connected in parallel with the normally open contact of the relay KM4, one end of the normally open contact 4 of the mode selection contactor KM1 is electrically connected to the ammeter A and the normally open contact 4 of the mode selection contactor KM2 at the same time, and the other end is electrically connected to the positive pole of the electromagnet inside the external high-speed circuit breaker through the aviation plug pin 4 of the device, and the mode selection contactor One end of the normally open contact 3 of KM1 is electrically connected to the normally open contact 3 of the mode selection contactor KM2, lamp L1 and lamp NCL at the same time, and the other end is electrically connected to the negative pole of the electromagnet inside the external high-speed circuit breaker through the aviation plug pin 3 of the device. One end of the normally open contact 4 of the mode selection contactor KM2 is electrically connected to the ammeter A and the normally open contact 4 of the mode selection contactor KM1 at the same time, and the other end is electrically connected to the positive pole of the electromagnet inside the external high-speed circuit breaker through the aviation plug pin 4A of the device. One end of the normally open contact 3 of the mode selection contactor KM2 is electrically connected to the normally open contact 3 of the mode selection contactor KM1, lamp L1 and lamp NCL at the same time, and the other end is electrically connected to the positive pole of the electromagnet inside the external high-speed circuit breaker through the aviation plug pin 4A of the device. Pin 3A is electrically connected to the negative pole of the electromagnet inside the external high-speed circuit breaker, one end of the normally open contact 5 of the mode selection contactor KM1 is electrically connected to the normally open contact 5 of the mode selection contactor KM2 and the lamp NCL at the same time, and the other end is electrically connected to the normally closed contact b end inside the external high-speed circuit breaker through the pin 5 of the aviation plug of the device, one end of the normally open contact 5 of the mode selection contactor KM2 is electrically connected to the normally open contact 5 of the mode selection contactor KM1 and the lamp NCL at the same time, and the other end is electrically connected to the b end of the normally closed contact NC inside the external high-speed circuit breaker through the pin 5A of the aviation plug of the device, and one end of the normally open contact 1 of the mode selection contactor KM1 is electrically connected to the relay KM 3, the normally open contact 1 of the mode selection contactor KM2, the normally open contact 2 of the mode selection contactor KM1 and the normally open contact 2 of the mode selection contactor KM2, and the other end is electrically connected to the a end of the normally closed contact NC inside the external high-speed circuit breaker through the pin 1 of the aviation plug of the device, and one end of the normally open contact 1 of the mode selection contactor KM2 is electrically connected to the normally open contact of the relay KM3, the normally open contact 1 of the mode selection contactor KM1, the normally open contact 2 of the mode selection contactor KM1 and the normally open contact 2 of the mode selection contactor KM2, and the other end is electrically connected to the a end of the normally closed contact NC inside the external high-speed circuit breaker through the pin 1A of the aviation plug of the device;One end of the normally open contact 6 of the mode selection contactor KM1 is electrically connected to the normally open contact 6 of the mode selection contactor KM2 and the lamp NOL, and the other end is electrically connected to the b end of the normally open contact NO inside the external high-speed circuit breaker through the pin 6 of the aviation plug of the device. One end of the normally open contact 6 of the mode selection contactor KM2 is electrically connected to the normally open contact 6 of the mode selection contactor KM1 and the lamp NOL, and the other end is electrically connected to the external high-speed circuit breaker through the pin 6A of the aviation plug of the device. The normally open contact 2 of the mode selection contactor KM1 is electrically connected to the normally open contact of the relay KM3, the normally open contact 2 of the mode selection contactor KM2, the normally open contact 1 of the mode selection contactor KM1 and the normally open contact 1 of the mode selection contactor KM2, and the other end is electrically connected to the a end of the normally closed contact NO inside the external high-speed circuit breaker through the pin 2 of the aviation plug of the device. The normally open contact 2 of the mode selection contactor KM2 is electrically connected to the a end of the normally closed contact NO inside the external high-speed circuit breaker. One end of the open contact 2 is electrically connected to the normally open contact of the relay KM3, the normally open contact 2 of the mode selection contactor KM1, the normally open contact 1 of the mode selection contactor KM1 and the normally open contact 1 of the mode selection contactor KM2. The other end is electrically connected to the a end of the normally open contact NO inside the external high-speed circuit breaker through the pin 2A of the aviation plug of the device. One end of the lamp NCL is electrically connected to the normally open contact 5 of the mode selection contactor KM2 and the normally open contact of the mode selection contactor KM1. 5, the other end is electrically connected to the lamp L1, one end of the lamp NOL is electrically connected to the normally open contact 3 of the mode selection contactor KM1, the normally open contact 3 of the mode selection contactor KM2, one end of the lamp NOL is electrically connected to the normally open contact 6 of the mode selection contactor KM2, the normally open contact 6 of the mode selection contactor KM1, and the other end is electrically connected to the lamp L1, one end of the lamp NCL is electrically connected to the normally open contact 3 of the mode selection contactor KM1, the normally open contact 3 of the mode selection contactor KM2. ;
[0012] Beneficial effects: The test control device is used to test the high-speed circuit breaker to be repaired on the additional vehicle, simulating the actual power-on condition of the electric passenger car. By operating the test control device, the high-speed circuit breaker is actuated, and the maintenance personnel can easily find the defects of the maintenance parts.
[0013] Secondly, after the high-speed circuit breaker is powered on with a large current and then pulled in, a small current is used to maintain the high-speed circuit breaker in the pulled-in state. This reduces the overheating of the coil caused by the power-on test process, makes the pull-in test more reliable and safe, and effectively increases the operating time of maintenance personnel in the pulled-in state.
[0014] An ammeter is added to the load circuit as a visualization window for the current passing through the coil, allowing maintenance personnel to monitor the coil current in real time and handle abnormalities in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1This is the circuit diagram of the power control unit of the utility model;
[0016] Figure 2 This is the circuit diagram of the signal control unit of the utility model;
[0017] Figure 3 This is the circuit diagram of the channel conversion unit of the utility model;
[0018] Figure 4 This is the circuit diagram of the load control unit of the utility model. DETAILED DESCRIPTION
[0019] Please refer to Figures 1 to 4 The utility model provides a technical solution: a high-speed circuit breaker test control device, including a power control unit, a channel conversion unit, a signal control unit and a load control unit. The power control unit is connected to an AC220V alternating current power supply, and provides a DC24V low voltage through a first power supply inside the power control unit, and a DC110V high voltage is provided by a second power supply. The channel conversion unit is electrically connected to the power control unit and the load control unit at the same time, and the signal control unit is electrically connected to the power control unit, and a DC24V low voltage is provided to the signal control unit through the power control unit. The load control unit is electrically connected to the power control unit, the channel conversion unit, the signal control unit and an external high-speed circuit breaker at the same time, and the channel power control unit provides a DC110V high voltage for it. The load control unit is used to feedback the power-on status of the high-speed circuit breaker for real-time monitoring by maintenance personnel, wherein, Figure 1 As shown, the power control unit includes a power-off switch E-STOP, a closed power switch QS, a fuse FR, a first power supply and a second power supply. One end of the power-off switch E-STOP is connected to an AC220V alternating current power supply, and the other end is electrically connected to the fuse FR. One end of the closed power switch QS is electrically connected to the fuse FR, and the other end is electrically connected to the first power supply. The other end of the first power supply is electrically connected to an AC220V alternating current power supply. The first power supply is connected in parallel with the second power supply. The AC220V alternating current power supply voltage is converted into a DC110V voltage for supplying to a channel conversion unit and a load control unit through the second power supply. The AC220V alternating current power supply voltage is converted into a DC24V low voltage for supplying power to a signal control unit through the first power supply. This can realize a test mode in which a high-speed circuit breaker is powered on and attracted by a large current and a small current maintains the high-speed circuit breaker in an attracted state. This reduces the overheating of the coil caused by the power-on test process, makes the attraction test more reliable and safe, and effectively increases the operating time of maintenance personnel in the attracted state.
[0020] In a further embodiment, the signal control unit includes a switch SB4, a switch SB3, a relay KM3, a relay KM4, a time relay KT and a cooling fan M, one end of the switch SB4 is electrically connected to the low-voltage converter, and the other end is electrically connected to the switch SB3, one end of the pull-in coil of the relay KM3 is electrically connected to the switch SB3, and the other end is electrically connected to the low-voltage converter, the normally open contact of the relay KM3 is connected in parallel with the switch SB3, the pull-in coil of the time relay KT, the pull-in coil of the relay KM3, the relay KM4 and the cooling fan M are connected in parallel with each other, and the normally open contact of the time relay KT is connected in series with the relay KM4.
[0021] In a further embodiment, the channel conversion unit includes a mode selection switch SF, a mode selection contactor KM1 and a mode selection contactor KM2, one end of the selection switch SF is electrically connected to the second power supply, the coil of the mode selection contactor KM1 is connected in parallel with the coil of the mode selection contactor KM2 and is electrically connected to the other end of the second power supply, the normally closed contact of the mode selection contactor KM1 is connected in series with the coil of the mode selection contactor KM2, the normally closed contact of the mode selection contactor KM2 is connected in series with the coil of the mode selection contactor KM1, contact ① of the selection switch SF is connected in series with the normally closed contact of the mode selection contactor KM2, and contact ② of the selection switch SF is connected in series with the normally closed contact of the mode selection contactor KM1. The load control unit includes a lamp L1, a lamp NCL, a lamp NOL, an ammeter A and a current limiting resistor R. The lamp L1 is connected in parallel with the second power supply in the power control unit. The normally open contact of the relay KM3 is electrically connected to the lamp L1. One end of the normally open contact of the relay KM4 is electrically connected to the normally open contact of the relay KM3, and the other end is electrically connected to the ammeter A. The current limiting resistor R is connected in parallel with the normally open contact of the relay KM4. One end of the normally open contact 4 of the mode selection contactor KM1 is electrically connected to the ammeter A and the normally open contact 4 of the mode selection contactor KM2 at the same time, and the other end is electrically connected to the positive pole of the electromagnet inside the external high-speed circuit breaker through the aviation plug pin 4 of the device. One end of the normally open contact 3 of the mode selection contactor KM1 is electrically connected to the mode selection The normally open contact 3 of the mode selection contactor KM2, the lamp L1 and the lamp NCL, and the other end is electrically connected to the negative pole of the electromagnet inside the external high-speed circuit breaker through the pin 3 of the aviation plug of the device. One end of the normally open contact 4 of the mode selection contactor KM2 is electrically connected to the ammeter A and the normally open contact 4 of the mode selection contactor KM1 at the same time, and the other end is electrically connected to the positive pole of the electromagnet inside the external high-speed circuit breaker through the pin 4A of the aviation plug of the device. One end of the normally open contact 3 of the mode selection contactor KM2 is electrically connected to the normally open contact 3 of the mode selection contactor KM1, the lamp L1 and the lamp NCL at the same time, and the other end is electrically connected to the negative pole of the electromagnet inside the external high-speed circuit breaker through the pin 3A of the aviation plug of the device. The normally open contact 4 of the mode selection contactor KM1 One end of the head 5 is electrically connected to the normally open contact 5 of the mode selection contactor KM2 and the lamp NCL at the same time, and the other end is electrically connected to the normally closed contact b end inside the external high-speed circuit breaker through the pin 5 of the aviation plug of the device. One end of the normally open contact 5 of the mode selection contactor KM2 is electrically connected to the normally open contact 5 of the mode selection contactor KM1 and the lamp NCL at the same time, and the other end is electrically connected to the b end of the normally closed contact NC inside the external high-speed circuit breaker through the pin 5A of the aviation plug of the device. One end of the normally open contact 1 of the mode selection contactor KM1 is electrically connected to the normally open contact of the relay KM3, the normally open contact 1 of the mode selection contactor KM2, the normally open contact 2 of the mode selection contactor KM1 and the normally open contact 2 of the mode selection contactor KM2.The other end is electrically connected to the a end of the normally closed contact NC inside the external high-speed circuit breaker through the pin 1 of the aviation plug of the device. One end of the normally open contact 1 of the mode selection contactor KM2 is electrically connected to the normally open contact of the relay KM3, the normally open contact 1 of the mode selection contactor KM1, the normally open contact 2 of the mode selection contactor KM1 and the normally open contact 2 of the mode selection contactor KM2. The other end is electrically connected to the a end of the normally closed contact NC inside the external high-speed circuit breaker through the pin 1A of the aviation plug of the device; one end of the normally open contact 6 of the mode selection contactor KM1 is electrically connected to the mode selection contactor The normally open contact 6 of KM2 and the lamp NOL, and the other end is electrically connected to the b end of the normally open contact NO inside the external high-speed circuit breaker through the pin 6 of the aviation plug of the device. One end of the normally open contact 6 of the mode selection contactor KM2 is simultaneously electrically connected to the normally open contact 6 of the mode selection contactor KM1 and the lamp NOL, and the other end is electrically connected to the b end of the normally closed contact NO inside the external high-speed circuit breaker through the pin 6A of the aviation plug of the device. One end of the normally open contact 2 of the mode selection contactor KM1 is simultaneously electrically connected to the normally open contact of the relay KM3, the normally open contact 2 of the mode selection contactor KM2, and the mode selection The normally open contact 1 of the mode selection contactor KM1 and the normally open contact 1 of the mode selection contactor KM2, and the other end is electrically connected to the a end of the normally closed contact NO inside the external high-speed circuit breaker through the pin 2 of the aviation plug of the device. One end of the normally open contact 2 of the mode selection contactor KM2 is electrically connected to the normally open contact of the relay KM3, the normally open contact 2 of the mode selection contactor KM1, the normally open contact 1 of the mode selection contactor KM1 and the normally open contact 1 of the mode selection contactor KM2, and the other end is electrically connected to the a end of the normally open contact NO inside the external high-speed circuit breaker through the pin 2A of the aviation plug of the device. The lamp N One end of CL is electrically connected to the normally open contact 5 of the mode selection contactor KM2 and the normally open contact 5 of the mode selection contactor KM1, and the other end is electrically connected to the lamp L1. One end of the lamp NOL is electrically connected to the normally open contact 3 of the mode selection contactor KM1 and the normally open contact 3 of the mode selection contactor KM2. One end of the lamp NOL is electrically connected to the normally open contact 6 of the mode selection contactor KM2 and the normally open contact 6 of the mode selection contactor KM1, and the other end is electrically connected to the lamp L1. One end of the lamp NCL is electrically connected to the normally open contact 3 of the mode selection contactor KM1 and the normally open contact 3 of the mode selection contactor KM2. Among them, NC normally closed contact and NO normally open contact are internal contacts of high-speed circuit breaker. By observing the on and off of lamps NCL and NOL, the situation of the electric contact point can be understood. By operating the test control device, the action of high-speed circuit breaker can be realized. The maintenance personnel can display the results through ammeter A. The maintenance personnel can monitor the current of the coil in real time. Ammeter A can be used as a visualization window for the current passing through the coil. When abnormalities are found, they can be handled in time to effectively avoid overheating of the coil.
[0022] It should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.
Claims
1. A high-speed circuit breaker test control device, characterized in that: include: A power control unit is connected to an AC220V AC power supply, and is used to provide a regulated power supply; A channel conversion unit electrically connected to the power control unit and the load control unit; A signal control unit is electrically connected to the power control unit, and provides a low voltage to the signal control unit through the power control unit; the signal control unit is used to control the channel conversion and the load control unit; The load control unit is electrically connected to the power control unit, the channel conversion unit, the signal control unit and the external high-speed circuit breaker. The channel power control unit provides high voltage for it. The load control unit is used to feedback the power-on status of the high-speed circuit breaker.
2. A high-speed circuit breaker test control device according to claim 1, characterized in that: The power control unit includes a power-off switch E-STOP, a closed power switch QS, a fuse FR, a first power supply and a second power supply. One end of the power-off switch E-STOP is connected to the AC220V AC power supply, and the other end is electrically connected to the fuse FR. One end of the closed power switch QS is electrically connected to the fuse FR, and the other end is electrically connected to the first power supply. The other end of the first power supply is electrically connected to the AC220V AC power supply. The first power supply is connected in parallel with the second power supply.
3. A high-speed circuit breaker test control device according to claim 2, characterized in that: The signal control unit includes a switch SB4, a switch SB3, a relay KM3, a relay KM4, a time relay KT and a cooling fan M. One end of the switch SB4 is electrically connected to the positive pole of the first power supply in the power control unit, and the other end is electrically connected to the switch SB3. One end of the pull-in coil of the relay KM3 is electrically connected to the switch SB3, and the other end is electrically connected to the first power supply in the power control unit. The normally open contact of the relay KM3 is connected in parallel with the switch SB3. The pull-in coil of the time relay KT, the pull-in coil of the relay KM3, the relay KM4 and the cooling fan M are connected in parallel with each other. The normally open contact of the time relay KT is connected in series with the relay KM4.
4. A high-speed circuit breaker test control device according to claim 3, characterized in that: The channel conversion unit includes a mode selection switch SF, a mode selection contactor KM1 and a mode selection contactor KM2, one end of the selection switch SF is electrically connected to the second power supply in the power control unit, the coil of the mode selection contactor KM1 is connected in parallel with the coil of the mode selection contactor KM2 and is electrically connected to the other end of the second power supply in the power control unit, the normally closed contact of the mode selection contactor KM1 is connected in series with the coil of the mode selection contactor KM2, the normally closed contact of the mode selection contactor KM2 is connected in series with the coil of the mode selection contactor KM1, contact ① of the selection switch SF is connected in series with the normally closed contact of the mode selection contactor KM2, and contact ② of the selection switch SF is connected in series with the normally closed contact of the mode selection contactor KM1.
5. A high-speed circuit breaker test control device according to claim 4, characterized in that: The load control unit includes a lamp L1, a lamp NCL, a lamp NOL, an ammeter A and a current limiting resistor R. The lamp L1 is connected in parallel with the second power supply in the power control unit. The normally open contact of the relay KM3 is electrically connected to the lamp L1. One end of the normally open contact of the relay KM4 is electrically connected to the normally open contact of the relay KM3, and the other end is electrically connected to the ammeter A. The current limiting resistor R is connected in parallel with the normally open contact of the relay KM4. One end of the normally open contact 4 of the mode selection contactor KM1 is electrically connected to the ammeter A and the normally open contact 4 of the mode selection contactor KM2 at the same time, and the other end is electrically connected to the positive pole of the electromagnet inside the external high-speed circuit breaker through the aviation plug pin 4 of the device. The mode selection contactor KM1 One end of the normally open contact 3 of the mode selection contactor KM2 is electrically connected to the normally open contact 3, lamp L1 and lamp NCL of the mode selection contactor KM2 at the same time, and the other end is electrically connected to the negative pole of the electromagnet inside the external high-speed circuit breaker through the aviation plug pin 3 of the device. One end of the normally open contact 4 of the mode selection contactor KM2 is electrically connected to the ammeter A and the normally open contact 4 of the mode selection contactor KM1 at the same time, and the other end is electrically connected to the positive pole of the electromagnet inside the external high-speed circuit breaker through the aviation plug pin 4A of the device. One end of the normally open contact 3 of the mode selection contactor KM2 is electrically connected to the normally open contact 3, lamp L1 and lamp NCL of the mode selection contactor KM1 at the same time, and the other end is electrically connected to the positive pole of the electromagnet inside the external high-speed circuit breaker through the aviation plug pin 3 of the device. Pin A is electrically connected to the negative pole of the electromagnet inside the external high-speed circuit breaker, one end of the normally open contact 5 of the mode selection contactor KM1 is electrically connected to the normally open contact 5 of the mode selection contactor KM2 and the lamp NCL at the same time, and the other end is electrically connected to the normally closed contact b end inside the external high-speed circuit breaker through pin 5 of the aviation plug of the device, one end of the normally open contact 5 of the mode selection contactor KM2 is electrically connected to the normally open contact 5 of the mode selection contactor KM1 and the lamp NCL at the same time, and the other end is electrically connected to the b end of the normally closed contact NC inside the external high-speed circuit breaker through pin 5A of the aviation plug of the device, and one end of the normally open contact 1 of the mode selection contactor KM1 is electrically connected to the relay KM3 at the same time. The normally open contact of the mode selection contactor KM2, the normally open contact 1 of the mode selection contactor KM2, the normally open contact 2 of the mode selection contactor KM1 and the normally open contact 2 of the mode selection contactor KM2, and the other end is electrically connected to the a end of the normally closed contact NC inside the external high-speed circuit breaker through the pin 1 of the aviation plug of the device. One end of the normally open contact 1 of the mode selection contactor KM2 is simultaneously electrically connected to the normally open contact of the relay KM3, the normally open contact 1 of the mode selection contactor KM1, the normally open contact 2 of the mode selection contactor KM1 and the normally open contact 2 of the mode selection contactor KM2, and the other end is electrically connected to the a end of the normally closed contact NC inside the external high-speed circuit breaker through the pin 1A of the aviation plug of the device;One end of the normally open contact 6 of the mode selection contactor KM1 is electrically connected to the normally open contact 6 of the mode selection contactor KM2 and the lamp NOL, and the other end is electrically connected to the b end of the normally open contact NO inside the external high-speed circuit breaker through the pin 6 of the aviation plug of the device. One end of the normally open contact 6 of the mode selection contactor KM2 is electrically connected to the normally open contact 6 of the mode selection contactor KM1 and the lamp NOL, and the other end is electrically connected to the external high-speed circuit breaker through the pin 6A of the aviation plug of the device. The normally open contact 2 of the mode selection contactor KM1 is electrically connected to the normally open contact of the relay KM3, the normally open contact 2 of the mode selection contactor KM2, the normally open contact 1 of the mode selection contactor KM1 and the normally open contact 1 of the mode selection contactor KM2, and the other end is electrically connected to the a end of the normally closed contact NO inside the external high-speed circuit breaker through the pin 2 of the aviation plug of the device. The normally open contact 2 of the mode selection contactor KM2 is electrically connected to the a end of the normally closed contact NO inside the external high-speed circuit breaker. One end of the open contact 2 is electrically connected to the normally open contact of the relay KM3, the normally open contact 2 of the mode selection contactor KM1, the normally open contact 1 of the mode selection contactor KM1 and the normally open contact 1 of the mode selection contactor KM2. The other end is electrically connected to the a end of the normally open contact NO inside the external high-speed circuit breaker through the pin 2A of the aviation plug of the device. One end of the lamp NCL is electrically connected to the normally open contact 5 of the mode selection contactor KM2 and the normally open contact of the mode selection contactor KM1. 5, the other end is electrically connected to the lamp L1, one end of the lamp NOL is electrically connected to the normally open contact 3 of the mode selection contactor KM1, the normally open contact 3 of the mode selection contactor KM2, one end of the lamp NOL is electrically connected to the normally open contact 6 of the mode selection contactor KM2, the normally open contact 6 of the mode selection contactor KM1, and the other end is electrically connected to the lamp L1, one end of the lamp NCL is electrically connected to the normally open contact 3 of the mode selection contactor KM1, the normally open contact 3 of the mode selection contactor KM2. ;