High-voltage switch action power supply

Abstract

A high-voltage switch action power supply comprises a shell, a wiring terminal is arranged on the shell, and the wiring terminal is used for being electrically connected with a high-voltage switch to be detected for testing; the wiring terminal comprises a switching-on terminal, a common terminal and a switching-off terminal, a switching-on air switch matched with the switching-on terminal is arranged on the shell, and a switching-off air switch matched with the switching-off terminal is arranged on the shell, so that the on-off states of the switching-on terminal and the switching-off terminal are respectively controlled; an energy storage port and an energy storage switch which are matched with each other are arranged on the shell and are used for supplementing energy supply to improve the stability of an output power supply; the output power supply of the wiring terminal is an electrical isolation type power supply and has overvoltage, overcurrent and short circuit protection functions.

Description

Technical field:

[0001] The utility model relates to a high-voltage switch action power supply. Background technology:

[0002] High-voltage switches are electrical appliances with a rated voltage of 3kV or above, mainly used for opening and closing conductive circuits. They mainly include high-voltage circuit breakers, disconnectors and high-voltage load switches. When a fault occurs in power equipment or lines, the relay protection device can act on the high-voltage switch to quickly cut off the faulty part from the power system, ensuring the normal operation of the fault-free part of the power system.

[0003] Generally, high-voltage switches need to undergo an action voltage test to verify their basic protective performance. Currently, the DC system of the on-site control cabinet is used as the test power supply, and the voltage is adjusted by a sliding rheostat for testing. If a short circuit occurs in the on-site test wiring or the DC is directly grounded, it will directly affect the entire DC system on site, causing the on-site high-voltage equipment to lose protection at the least, or even causing the on-site DC system to collapse at the worst. If the on-site AC power is used, the DC is directly output after a simple silicon rectification through a voltage regulator, which is inconvenient to use, and the simple silicon rectifier DC output ripple is large. No electrical isolation is set, which endangers personal safety, and at the same time, it cannot be grounded and causes a grounding fault. Utility model content:

[0004] The embodiment of the utility model provides a high-voltage switch action power supply with reasonable structural design and adopts high-frequency switch power supply technology to improve the stability of the output voltage and reduce the ripple factor, thereby overcoming the disadvantage of the traditional rectifier power supply that the voltage drops sharply instantly when the load is added; at the same time, the output power supply is an electrically isolated power supply with high safety and reliability. Unlike the rectifier power supply of a voltage regulator or a thyristor, there is no possibility of the equipment being energized and people being electrocuted, and there is no possibility of the instrument being DC grounded, thereby ensuring the accuracy and reliability of the test results. The utility model can be used as a high-voltage switch action voltage test, and provide an independent test power supply for on-site high-voltage switch characteristic tests and tripping operations. The utility model can also be used as a temporary DC power supply for a switch cabinet, and has overvoltage, overcurrent, and short-circuit protection functions, thereby solving the problems existing in the prior art.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] A high-voltage switch action power supply comprises a housing, on which a connection terminal is arranged, and the connection terminal is used to electrically connect a high-voltage switch to be tested for testing; the connection terminal comprises a closing terminal, a common terminal and an opening terminal, and a closing air switch matched with the closing terminal is arranged on the housing, and an opening air switch matched with the opening terminal is arranged on the housing, so as to control the on-off state of the closing terminal and the opening terminal respectively;

[0007] The housing is provided with a matching energy storage port and energy storage switch to serve as a supplementary energy supply to improve the stability of the output power supply;

[0008] The output power supply of the wiring terminal is an electrically isolated power supply with overvoltage, overcurrent and short circuit protection functions.

[0009] A display screen is provided on the housing, and the display screen is used to display corresponding test parameters and test DC voltage.

[0010] A power interface, a power switch and a power adjustment knob are provided on the housing. The power adjustment knob is used to adjust and set the discharge voltage of the high-voltage switch to be detected and the DC voltage required by the high-voltage switch to be detected.

[0011] A detection wiring diagram is provided on the housing to facilitate access to the high-voltage switch to be detected.

[0012] A grounding terminal is arranged on the shell at one end of the display screen.

[0013] The utility model adopts the above structure, and is used to electrically connect the high-voltage switch to be tested through the wiring terminal for testing; the on-off state of the closing terminal and the opening terminal are respectively controlled by the closing air switch and the opening air switch; the discharge voltage of the high-voltage switch to be tested and the DC voltage required by the high-voltage switch to be tested are adjusted and set by the power adjustment knob; the corresponding test parameters and the test DC voltage are displayed by the display screen, and the utility model has the advantages of being safe, reliable, stable and practical. Description of the drawings:

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 This is a detection wiring diagram of the utility model. Specific implementation method:

[0016] In order to clearly illustrate the technical features of the present invention, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0017] like Figure 1-2 As shown in , a high-voltage switch action power supply comprises a housing, on which a wiring terminal is provided, and the wiring terminal is used to electrically connect a high-voltage switch to be tested for testing; the wiring terminal comprises a closing terminal, a common terminal and an opening terminal, and a closing air switch matched with the closing terminal is provided on the housing, and an opening air switch matched with the opening terminal is provided on the housing, so as to control the on-off state of the closing terminal and the opening terminal respectively;

[0018] The housing is provided with a matching energy storage port and energy storage switch to serve as a supplementary energy supply to improve the stability of the output power supply;

[0019] The output power supply of the wiring terminal is an electrically isolated power supply with overvoltage, overcurrent and short circuit protection functions.

[0020] A display screen is provided on the housing, and the display screen is used to display corresponding test parameters and test DC voltage.

[0021] A power interface, a power switch and a power adjustment knob are provided on the housing. The power adjustment knob is used to adjust and set the discharge voltage of the high-voltage switch to be detected and the DC voltage required by the high-voltage switch to be detected.

[0022] A detection wiring diagram is provided on the housing to facilitate access to the high-voltage switch to be detected.

[0023] A grounding terminal is arranged on the shell at one end of the display screen.

[0024] The working principle of a high-voltage switch action power supply in the embodiment of the utility model is as follows: high-frequency switching power supply technology is adopted to improve the stability of the output voltage, reduce the ripple factor, and overcome the disadvantage that the voltage of the traditional rectifier power supply will drop sharply instantly when the load is added; at the same time, the output power supply is an electrically isolated power supply with high safety and reliability. Unlike the rectifier power supply of the voltage regulator or the thyristor, there is no possibility of the equipment being energized and people being electrocuted, and there is no possibility of the instrument being DC grounded, thereby ensuring the accuracy and reliability of the test results. It can be used as a high-voltage switch action voltage test, and provide an independent test power supply for on-site high-voltage switch characteristic tests and tripping operations. It can also be used as a temporary DC power supply for switch cabinets, and has overvoltage, overcurrent, and short-circuit protection functions. The overall product has a beautiful appearance and a firm structure. It can withstand the vibration and impact caused by frequent transportation, loading and unloading, and moving, and can also be convenient for on-site carrying and use.

[0025] In the overall scheme, it mainly includes a shell, on which are arranged wiring terminals, the wiring terminals are used to electrically connect the high-voltage switch to be tested for testing; the wiring terminals include a closing terminal, a common terminal and an opening terminal, a closing air switch matched with the closing terminal is arranged on the shell, and an opening air switch matched with the opening terminal is arranged on the shell, so as to control the on-off state of the closing terminal and the opening terminal respectively;

[0026] The housing is provided with a matching energy storage port and energy storage switch to serve as a supplementary energy supply to improve the stability of the output power supply;

[0027] The output power supply of the wiring terminal is an electrically isolated power supply with overvoltage, overcurrent and short circuit protection functions.

[0028] In actual use, according to the wiring instructions in the detection wiring diagram, the instrument should be reliably grounded and ready to connect to the input power AC220V 50Hz, disconnect the control power of the high-voltage switch to be tested, connect the test line according to the on-site wiring requirements, and turn on the main power switch of the instrument.

[0029] Adjust the current adjustment knob to adjust the DC voltage to the required voltage value; push the air switch to close or open, and complete the action voltage test after the switch is actuated; after the test is completed, quickly disconnect the air switch or open, adjust the current adjustment knob back to zero, wait for tens of seconds for the internal discharge of the instrument to be completed, and the DC voltmeter indication drops to near zero volts before removing the control line and finally remove the ground wire to complete the overall test.

[0030] During the entire test process, the corresponding test parameters will be displayed to facilitate real-time viewing by staff.

[0031] The present application can provide an independent test power supply for the closing and opening operations of the on-site high-voltage switch characteristic test, thus providing conditions for the safe operation of the on-site equipment.

[0032] Furthermore, the DC output of the present application is adjustable from 0 to 270 V, the rated current is 15 A, and the voltage stability is below 1%.

[0033] Preferably, a power interface, a power switch and a power adjustment knob are provided on the shell, and the power adjustment knob is used to adjust and set the discharge voltage of the high-voltage switch to be detected and the DC voltage required by the high-voltage switch to be detected, and can be accurately adjusted according to the type of equipment to be detected and the specific application scenario.

[0034] Preferably, a grounding terminal is provided on the shell at one end of the display screen to achieve electrical isolation, providing effective protection for the device and the electrical components to be tested. There is no possibility of the device being energized and shocking people, and there is no possibility of the instrument being DC grounded, thereby improving the safety factor and avoiding danger.

[0035] It should be noted that there is a setting button below the display screen to set the parameter type and display mode, further improving the convenience of the device.

[0036] To sum up, a high-voltage switch action power supply in the embodiment of the utility model adopts high-frequency switching power supply technology to improve the stability of the output voltage, reduce the ripple factor, and overcome the disadvantage that the traditional rectifier power supply will instantly and drastically collapse the voltage when the load is added; at the same time, the output power supply is an electrically isolated power supply with high safety and reliability. Unlike the rectifier power supply of the voltage regulator or thyristor, there is no possibility of the equipment being energized and people being electrocuted, and there is no possibility of the instrument being DC grounded, which ensures the accuracy and reliability of the test results. It can be used as a high-voltage switch action voltage test, and provide an independent test power supply for on-site high-voltage switch characteristic tests and tripping operations. It can also be used as a temporary DC power supply for switch cabinets, and has overvoltage, overcurrent, and short-circuit protection functions. The overall product has a beautiful appearance and a firm structure. It can withstand the vibration and impact caused by frequent transportation, loading and unloading, and moving, and can also be convenient for on-site carrying and use.

[0037] The above-mentioned specific implementation manner cannot be used as a limitation on the protection scope of the present utility model. For those skilled in the art, any replacement, improvement or change made to the implementation manner of the present utility model falls within the protection scope of the present utility model.

[0038] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A high voltage switching power supply, characterized in that: It comprises a housing, on which are arranged wiring terminals, the wiring terminals being used to electrically connect a high-voltage switch to be tested for testing; the wiring terminals comprise a closing terminal, a common terminal and an opening terminal, a closing air switch matched with the closing terminal is arranged on the housing, and an opening air switch matched with the opening terminal is arranged on the housing, so as to respectively control the on-off state of the closing terminal and the opening terminal; The housing is provided with a matching energy storage port and energy storage switch to serve as a supplementary energy supply to improve the stability of the output power supply; The output power supply of the wiring terminal is an electrically isolated power supply with overvoltage, overcurrent and short circuit protection functions.

2. A high voltage switching power supply according to claim 1, characterized in that: A display screen is provided on the housing, and the display screen is used to display corresponding test parameters and test DC voltage.

3. A high voltage switching power supply according to claim 1, characterized in that: A power interface, a power switch and a power adjustment knob are provided on the housing. The power adjustment knob is used to adjust and set the discharge voltage of the high-voltage switch to be detected and the DC voltage required by the high-voltage switch to be detected.

4. A high voltage switching power supply according to claim 1, characterized in that: A detection wiring diagram is provided on the housing to facilitate access to the high-voltage switch to be detected.

5. A high voltage switching power supply according to claim 2, characterized in that: A grounding terminal is arranged on the shell at one end of the display screen.

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