CN109406905B - Lightning current surge test system - Google Patents

Lightning current surge test system Download PDF

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Publication number
CN109406905B
CN109406905B CN201811493936.7A CN201811493936A CN109406905B CN 109406905 B CN109406905 B CN 109406905B CN 201811493936 A CN201811493936 A CN 201811493936A CN 109406905 B CN109406905 B CN 109406905B
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lightning current
module
surge
voltage
current
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CN109406905A (en
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陈民胜
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Zhuhai Telehof Electrics Co ltd
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Zhuhai Telehof Electrics Co ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

The invention discloses a lightning current impulse test system which comprises a function key module, a lightning current generating device, an indicator lamp and a surge protector, wherein the function key module, the lightning current generating device and the surge protector are sequentially connected, and the indicator lamp is connected with the surge protector in parallel; the function key module is used for setting a lightning current impulse request; the lightning current generating device is used for generating lightning current waves with a certain voltage value according to the lightning current surge request and outputting the lightning current waves to the surge protector after receiving the lightning current surge request sent by the function key module; and the indicator lamp is used for indicating a lightning current surge test result after the surge protector receives lightning current surge. The embodiment of the invention can intuitively observe the protection effect of the qualified surge protector on equipment when lightning current is impacted, thereby being capable of rapidly and accurately screening out the surge protector which does not meet the regulation.

Description

Lightning current surge test system
Technical Field
The invention relates to the technical field of power electronics, in particular to a lightning current surge test system.
Background
The surge protector (Surge Protective Device, SPD), also called lightning protector, is an electronic device that provides safety protection for various electronic equipment, instrumentation and communication lines. When a peak current or voltage is suddenly generated in an electric loop or a communication line due to external interference, the surge protector can conduct shunt in a very short time, so that damage of the surge to other equipment in the loop is avoided.
In GB18802.1-2012, IEC61643-1, U L1449 and other standard standards, the surge protector must be tested by lightning current surge, namely, a lightning current generating device is used for generating a lightning current wave of 8/20 mu s to test the surge protector by lightning current surge.
The current lightning current surge test system cannot enable people to intuitively see whether surge protector equipment works or not when lightning current surge is received, so that surge protectors which do not meet the regulations cannot be screened out quickly.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the lightning current surge test system which can intuitively observe the protection effect of the qualified surge protector on equipment when lightning current surge is received, so that the surge protector which does not meet the regulation can be rapidly and accurately screened out.
In order to solve the technical problems, the invention provides a lightning current impulse test system which comprises a function key module, a lightning current generating device, an indicator lamp and a surge protector, wherein the function key module, the lightning current generating device and the surge protector are sequentially connected, and the indicator lamp is connected with the surge protector in parallel;
the function key module is used for setting a lightning current impulse request; wherein the lightning current surge request includes a charging control signal;
the lightning current generating device is used for generating lightning current waves with a certain voltage value according to the lightning current surge request and outputting the lightning current waves to the surge protector after receiving the lightning current surge request sent by the function key module;
and the indicator lamp is used for indicating a lightning current surge test result after the surge protector receives the lightning current surge.
Further, the lightning current generating device comprises a PLC controller, a charging module, an energy storage module, a wave regulating module and a discharging module;
the PLC controller comprises a setting signal input end, a discharging signal output end and a charging signal output end, and the discharging module comprises a discharging current input end, a discharging signal input end and a discharging end;
the power supply device comprises a power key module, a charging module, an energy storage module, a surge protector, a power key module, a power switch module and a power switch module, wherein the power key module is connected with the power key module, a discharging signal output end is connected with the discharging signal input end, a charging signal output end is connected with the input end of the charging module, the output end of the charging module is connected with the energy storage module, the energy storage module is connected with the discharging current input end of the discharging module, the energy storage module is connected with the surge protector, and the discharging end of the discharging module is connected with the surge protector.
Further, the PLC controller further comprises a grounding signal output end, the lightning current generating device further comprises a grounding module, and the grounding module comprises a first intermediate relay, a motor push rod grounding device and a grounding state indicator lamp;
the grounding signal output end is connected with the coil of the first intermediate relay, the switch of the first intermediate relay is connected with the grounding coil of the motor push rod grounding device, the first end of the grounding switch of the motor push rod grounding device is connected to an alternating-current live wire, the second end of the grounding switch of the motor push rod grounding device is connected with the first end of the grounding state indicator lamp, and the second end of the grounding state indicator lamp is connected to an alternating-current zero line.
Further, the discharge module comprises a second intermediate relay and a discharge trigger ball;
the coil of the second intermediate relay is connected with the discharge signal input end, the switch of the second intermediate relay is connected with the coil of the discharge trigger ball, the first electrode of the discharge trigger ball is connected with the discharge current input end, and the second electrode of the discharge trigger ball is connected with the discharge end.
Further, the charging module comprises a third intermediate relay, an alternating current contactor, a voltage regulating unit, a third resistor, a step-up isolation transformer and a high-voltage silicon stack;
the coil of the third intermediate relay is connected with the input end of the charging module, the switch of the third intermediate relay is connected with the coil of the alternating current contactor, the switch of the alternating current contactor is connected with the input end of the voltage regulating unit, the output end of the voltage regulating unit is connected with the primary winding of the step-up isolation transformer through the third resistor, the first end of the secondary winding of the step-up isolation transformer is connected with the positive electrode of the high-voltage silicon stack, and the negative electrode of the high-voltage silicon stack is connected with the output end of the charging module.
Further, the energy storage module comprises a capacitor;
and the first end of the capacitor is connected with the negative electrode of the high-voltage silicon stack, and the second end of the capacitor is connected with the second end of the secondary winding of the step-up isolation transformer.
Further, the function key module comprises a remote control unit and a remote controller,
the remote control unit is connected with the PLC controller, and the remote control unit is connected with the remote control unit in a wireless communication mode.
Further, the lightning current surge test system also comprises a measurement display module;
the lightning current generating device also comprises a voltage sampling unit, wherein the voltage sampling unit comprises a voltage sampling end, a grounding end and a sampling voltage signal output end;
the voltage sampling end is connected with the energy storage module, and the sampling voltage signal output end is connected with the measurement display module.
Further, the lightning current surge test system also comprises a current sampling unit, wherein the current sampling unit comprises a current sampling end and a sampling current signal output end;
the current sampling end is connected with the wave regulating module, and the sampling current signal output end is connected with the measurement display module.
Further, the lightning current impulse test system also comprises a residual voltage detection unit, wherein the residual voltage detection unit comprises a detection end and a residual voltage signal output end;
the detection end is connected with the surge protector, and the residual voltage signal output end is connected with the measurement display module.
According to the lightning current surge test system, when lightning current surge test is carried out, the lightning current surge request is set through the function key module, the lightning current generating device generates lightning current waves with a certain voltage value according to the lightning current surge request and outputs the lightning current waves to the surge protector after receiving the lightning current surge request, the indicator lamp indicates the lightning current surge test result after the surge protector receives the lightning current wave surge, when the surge protector works, the indicator lamp is intact, when the surge protector does not meet the specified failure, the indicator lamp bursts, and therefore a protective effect of the qualified surge protector on equipment can be visually seen, and the surge protector which does not meet the specified can be rapidly and accurately screened out.
Drawings
FIG. 1 is a circuit block diagram of a first embodiment of a lightning current surge testing system provided by the present invention;
FIG. 2 is a circuit block diagram of a second embodiment of a lightning current surge testing system provided by the present invention;
FIG. 3 is a schematic circuit diagram of one embodiment of a grounding module of a lightning current generation device provided by the present invention;
FIG. 4 is a schematic circuit diagram of one embodiment of a discharge module of a lightning current generation device provided by the present invention;
FIG. 5 is a schematic circuit diagram of one embodiment of a charging module of a lightning current generation device provided by the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a circuit block diagram of a first embodiment of a lightning current surge testing system provided by the present invention.
The embodiment of the invention provides a lightning current impulse test system, which comprises a function key module 1, a lightning current generating device 2, an indicator lamp HL and a surge protector 3, wherein the function key module 1, the lightning current generating device 2 and the surge protector 3 are sequentially connected, and the indicator lamp HL is connected with the surge protector 3 in parallel;
the function key module 1 is used for setting a lightning current impulse request; wherein the lightning current surge request includes a charging control signal;
the lightning current generating device 2 is used for generating lightning current waves with a certain voltage value according to the lightning current surge request and outputting the lightning current waves to the surge protector 3 after receiving the lightning current surge request sent by the function key module 1;
and the indicator lamp HL is used for indicating a lightning current surge test result after the surge protector 3 receives the lightning current surge.
In the specific implementation, a lightning current surge request is set through the function key module 1, after the lightning current surge request sent by the function key module 1 is received, the lightning current generating device 2 generates lightning current waves with a certain voltage value according to the lightning current surge request and outputs the lightning current waves to the surge protector 3, after the surge protector 3 receives the lightning current wave surge, the indicator lamp HL indicates a lightning current surge test result, when the surge protector 3 works, the indicator lamp HL is intact, when the surge protector 3 does not accord with the specified failure, the indicator lamp HL bursts, and one protection effect of the qualified surge protector 3 on equipment can be visually seen, so that the surge protector 3 which does not accord with the specified can be quickly and accurately screened out.
The device can be intuitively observed by arranging the indicator lamp HL, so that the damage of the surge protector 3 to the device and the protection effect of the surge protector 3 to the device can be avoided when the lightning current surge test is performed. The indicator lamp HL can adopt an incandescent bulb, when the surge protector 3 is installed, lightning current surge is carried out, the incandescent bulb used as a sample is obviously seen to be intact, when the surge protector 3 is disassembled, lightning current surge is carried out, the incandescent bulb can be clearly seen to be completely burst, and the operation is simple, and the result is clear and easy to understand.
Referring to fig. 2, a circuit block diagram of a second embodiment of the lightning current surge testing system provided by the present invention is shown. As shown in fig. 2, the lightning current generation device 2 includes a PLC controller 21, a charging module 22, an energy storage module 23, a wave regulating module 24, and a discharging module 25;
the PLC controller 21 includes a set signal input terminal a, a discharge signal output terminal Y2, and a charge signal output terminal Y1, and the discharge module 25 includes a discharge current input terminal c, a discharge signal input terminal b, and a discharge terminal d;
the set signal input end a is connected with the function key module 1, the discharge signal output end Y2 is connected with the discharge signal input end b, the charge signal output end Y1 is connected with the input end of the charge module 22, the output end of the charge module 22 is connected with the energy storage module 23, the energy storage module 23 is connected with the discharge current input end c of the discharge module 25, the energy storage module 23 is connected with the wave regulating module 24, and the discharge end d of the discharge module 25 is connected with the surge protector 3.
The working process of the lightning current generating device 2 is as follows: when the setting signal input end a of the PLC 21 receives a charging control signal, the charging signal output end Y1 of the PLC 21 outputs a charging signal to the input end of the charging module 22, the charging module 22 charges the energy storage module 23 according to the charging signal, the wave regulating module 24 regulates the charging voltage to generate lightning current waves with a certain voltage value, the energy storage module 23 sends the lightning current waves to the discharging current input end c of the discharging module 25, after charging is finished, the PLC 21 sends the discharging signal to the discharging signal input end b of the discharging module 25, the discharging module 25 applies the lightning current waves to the surge protector 3 through the discharging end d after receiving the discharging signal, so that the surge protector 3 is tested in impact, when the surge protector 3 works, the indicator lamp HL is intact, and when the surge protector 3 fails according with a rule, the indicator lamp HL bursts, one protecting effect of the qualified surge protector 3 on equipment can be visually seen, thus the output and input of control points of the PLC 21 can be quickly and accurately screened, a lot of control devices are reduced, and the cost is reduced.
The lightning current surge request further includes a discharge control signal, when the lightning current surge test needs to be interrupted due to a special reason, the charging is not completed yet, the PLC controller 21 does not send the discharge signal to the discharge module 25, the discharge module 25 is not discharged, the energy stored by the energy storage module 23 brings potential safety hazards, so that the discharge control signal is set through the function key module 1, and the PLC controller 21 controls the discharge module 25 to discharge according to the discharge control signal, thereby improving the safety.
Further, the function key module 1 includes a remote control unit 102 and a remote controller 101,
the remote control unit 102 is connected to the PLC controller 21, and the remote control unit 101 is connected to the remote control unit 102 by wireless communication. When the lightning current surge request is set, the remote controller 101 can be used for remote input, so that the operation is convenient.
Further, the lightning current surge test system also comprises a measurement display module 4;
the lightning current generating device 2 further comprises a voltage sampling unit 27, wherein the voltage sampling unit 27 comprises a voltage sampling end e, a grounding end GND and a sampling voltage signal output end f;
the voltage sampling end e is connected with the energy storage module 23, and the sampling voltage signal output end f is connected with the measurement display module 4.
The charging voltage of the energy storage module 23 is collected in real time by the voltage sampling unit 27, and is displayed by the measurement display module 4. The voltage sampling unit 27 includes a first resistor R1 and a second resistor R2; the first end of the first resistor R1 is connected with the voltage sampling end e, the second end of the first resistor R1 is connected with the grounding end GND through the second resistor R2, and the second end of the first resistor R1 is connected with the sampling voltage signal output end f. The first resistor R1 and the second resistor R2 divide and sample the charging voltage of the energy storage module 23.
Further, the lightning current surge test system also comprises a current sampling unit 5, wherein the current sampling unit 5 comprises a current sampling end i and a sampling current signal output end h;
the current sampling end i is connected with the wave regulating module 24, and the sampling current signal output end h is connected with the measurement display module 4. The current sampling unit 5 may employ a rogowski coil.
Further, the lightning current impulse test system also comprises a residual voltage detection unit 6, wherein the residual voltage detection unit 6 comprises a detection end de and a residual voltage signal output end u;
the detection end de is connected with the surge protector 3, and the residual voltage signal output end u is connected with the measurement display module 4.
The residual voltage detecting unit 6 includes a fourth resistor R4 and a fifth resistor R5; the first end of the fourth resistor R4 is connected with the detection end de, the second end of the fourth resistor R4 is grounded through the fifth resistor R5, and the second end of the fourth resistor R4 is connected with the residual voltage signal output end u. The fourth resistor R4 and the fifth resistor R5 divide and sample the voltage flowing into the ground after the lightning current surge test is completed.
Referring to fig. 3, a schematic circuit diagram of an embodiment of a grounding module of a lightning current generator according to the present invention is shown. As shown in fig. 2 and 3, the PLC controller 21 further includes a ground signal output terminal Y0, the lightning current generating device 2 further includes a ground module 26, and the ground module 26 includes a first intermediate relay ZJ1, a motor pushrod ground device LA, and a ground status indicator lamp HL;
the grounding signal output end Y0 is connected with the ZJ1 coil of the first intermediate relay, a switch of the first intermediate relay ZJ1 is connected with the grounding coil LA1 of the motor push rod grounding device LA, a first end of a grounding switch LA3 of the motor push rod grounding device LA is connected to an alternating-current live wire L, a second end of the grounding switch LA3 of the motor push rod grounding device LA is connected with a first end of a grounding state indicator lamp HL, and a second end of the grounding state indicator lamp HL is connected to an alternating-current zero line N.
When the grounding module 26 receives a grounding signal sent by the grounding signal output end Y0 of the PLC controller 21, the grounding coil LA1 of the motor push rod grounding device LA has a current passing through, the push rod LA2 of the motor push rod grounding device LA extends out, so that the grounding switch LA3 of the motor push rod grounding device LA is closed, the grounding module 26 completes grounding, and the grounding status indicator lamp HL1 is on.
Referring to fig. 4, a schematic circuit diagram of an embodiment of a discharge module 25 of a lightning current generation device according to the invention is shown. As shown in fig. 4, the discharge module 25 includes a second intermediate relay ZJ2 and a discharge trigger ball G;
the coil of the second intermediate relay ZJ2 is connected with the discharge signal input end b, the switch of the second intermediate relay ZJ2 is connected with the coil G1 of the discharge trigger ball G, the first electrode G2 of the discharge trigger ball G is connected with the discharge current input end c, and the second electrode G3 of the discharge trigger ball G is connected with the discharge end d.
The working engineering of the discharge module 25 is as follows: when the discharge signal input end b receives the discharge signal, the coil of the second intermediate relay ZJ2 is electrified, the switch of the second intermediate relay ZJ2 is closed, the coil G1 of the discharge trigger ball G is electrified, and the first electrode G2 of the discharge trigger ball G and the second electrode G3 of the discharge trigger ball G are in contact discharge.
The trigger interlock switch K3 may be further provided between the switch of the second intermediate relay ZJ2 and the coil G1 of the discharge trigger ball G, so as to perform double discharge protection.
Referring to fig. 5, a schematic circuit diagram of an embodiment of a charging module of a lightning current generator according to the present invention is shown. As shown in fig. 2 and 5, the charging module 22 includes a third intermediate relay ZJ3, an ac contactor KM, a voltage regulating unit 28, a third resistor R3, a step-up isolation transformer T, and a high-voltage silicon stack D1;
the coil of the third intermediate relay ZJ3 is connected with the input end of the charging module 22, the switch of the third intermediate relay ZJ3 is connected with the coil of the ac contactor KM, the switch of the ac contactor KM is connected with the input end of the voltage regulating unit 28, the output end of the voltage regulating unit 28 is connected with the primary winding of the step-up isolation transformer T through the third resistor R3, the first end of the secondary winding of the step-up isolation transformer T is connected with the positive electrode of the high-voltage silicon stack D1, and the negative electrode of the high-voltage silicon stack D1 is connected with the output end of the charging module 22.
The working engineering of the charging module 22 is as follows: when the input end of the charging module 22 receives the charging signal, the coil of the third intermediate relay ZJ3 is energized, the switch of the third intermediate relay ZJ3 is closed, the coil of the ac contactor KM is energized, the switch of the ac contactor KM is closed, the voltage regulating unit 28 regulates the voltage of the primary winding of the input boost isolation transformer T, the boost isolation transformer T boosts the input voltage, and the energy storage module 23 is charged through the high-voltage silicon stack D1. The high-voltage silicon stack D1 is used to prevent the voltage from reverse breakdown to damage the step-up isolation transformer T.
It should be noted that, the lightning current generating device 2 further includes a charging indication module HL2; the charging indication module HL2 is connected with a switch of the alternating current contactor KM.
Further, the energy storage module 23 includes a capacitor;
the first end of the capacitor is connected with the negative electrode of the high-voltage silicon stack D1, and the second end of the capacitor is connected with the second end of the secondary winding of the step-up isolation transformer T.
It should be noted that, the charging module 22 stores energy in the energy storage module 23, that is, charges two ends of the capacitor, and when the energy storage module is charged to a predetermined voltage, the wave-regulating module 24 regulates the charging voltage to generate a lightning current wave with a certain voltage value, and the energy storage module 23 sends the lightning current wave to the discharge current input end c of the discharge module 25. The energy storage module 23 in a general lightning current generation device is formed by connecting a plurality of capacitors in parallel, so that the volume of the lightning current generation device is increased. The tuning module 24 may employ a tuning resistor, and the second end of the capacitor is grounded through the tuning resistor.
Further, the function key module 1 comprises a first charging interlocking switch K1 and a second charging interlocking switch K2;
the switch of the third time relay ZJ3 is connected to the coil of the ac contactor KM through the first charging interlock switch K1, and the switch of the ac contactor KM is connected to the input terminal of the voltage regulating unit 28 through the second charging interlock switch K2.
It should be noted that, the first charging interlock switch K1 and the second charging interlock switch K2 play a role of dual protection, so as to avoid the situation of misoperation caused by pressing the remote controller by mistake.
According to the lightning current surge test system, when lightning current surge test is carried out, the lightning current surge request is set through the function key module, the lightning current generating device generates lightning current waves with a certain voltage value according to the lightning current surge request and outputs the lightning current waves to the surge protector after receiving the lightning current surge request, the indicator lamp indicates the lightning current surge test result after the surge protector receives the lightning current wave surge, when the surge protector works, the indicator lamp is intact, when the surge protector does not meet the specified failure, the indicator lamp bursts, and therefore a protective effect of the qualified surge protector on equipment can be visually seen, and the surge protector which does not meet the specified can be rapidly and accurately screened out.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.

Claims (9)

1. The lightning current impulse test system is characterized by comprising a function key module, a lightning current generating device, an indicator lamp and a surge protector, wherein the function key module, the lightning current generating device and the surge protector are sequentially connected, and the indicator lamp is connected with the surge protector in parallel;
the function key module is used for setting a lightning current impulse request; wherein the lightning current surge request includes a charging control signal;
the lightning current generating device is used for generating lightning current waves with a certain voltage value according to the lightning current surge request and outputting the lightning current waves to the surge protector after receiving the lightning current surge request sent by the function key module; the lightning current generating device comprises a PLC controller, a charging module, an energy storage module, a wave regulating module and a discharging module;
the PLC controller comprises a setting signal input end, a discharging signal output end and a charging signal output end, and the discharging module comprises a discharging current input end, a discharging signal input end and a discharging end;
the setting signal input end is connected with the function key module, the discharging signal output end is connected with the discharging signal input end, the charging signal output end is connected with the input end of the charging module, the output end of the charging module is connected with the energy storage module, the energy storage module is connected with the discharging current input end of the discharging module, the energy storage module is connected with the wave regulating module, and the discharging end of the discharging module is connected with the surge protector;
and the indicator lamp is used for indicating a lightning current surge test result after the surge protector receives the lightning current surge.
2. The lightning current surge test system of claim 1 wherein the PLC controller further comprises a ground signal output, the lightning current generation device further comprising a ground module, the ground module comprising a first intermediate relay, a motor pushrod ground device, and a ground status indicator;
the grounding signal output end is connected with the coil of the first intermediate relay, the switch of the first intermediate relay is connected with the grounding coil of the motor push rod grounding device, the first end of the grounding switch of the motor push rod grounding device is connected to an alternating-current live wire, the second end of the grounding switch of the motor push rod grounding device is connected with the first end of the grounding state indicator lamp, and the second end of the grounding state indicator lamp is connected to an alternating-current zero line.
3. The lightning current surge testing system of claim 2, wherein the discharge module comprises a second intermediate relay and a discharge trigger ball;
the coil of the second intermediate relay is connected with the discharge signal input end, the switch of the second intermediate relay is connected with the coil of the discharge trigger ball, the first electrode of the discharge trigger ball is connected with the discharge current input end, and the second electrode of the discharge trigger ball is connected with the discharge end.
4. The lightning current surge test system of claim 1, wherein the charging module comprises a third intermediate relay, an ac contactor, a voltage regulating unit, a third resistor, a step-up isolation transformer, and a high voltage silicon stack;
the coil of the third intermediate relay is connected with the input end of the charging module, the switch of the third intermediate relay is connected with the coil of the alternating current contactor, the switch of the alternating current contactor is connected with the input end of the voltage regulating unit, the output end of the voltage regulating unit is connected with the primary winding of the step-up isolation transformer through the third resistor, the first end of the secondary winding of the step-up isolation transformer is connected with the positive electrode of the high-voltage silicon stack, and the negative electrode of the high-voltage silicon stack is connected with the output end of the charging module.
5. The lightning current surge testing system of claim 4 wherein the energy storage module comprises a capacitor;
and the first end of the capacitor is connected with the negative electrode of the high-voltage silicon stack, and the second end of the capacitor is connected with the second end of the secondary winding of the step-up isolation transformer.
6. The lightning current surge testing system of any of claims 1 to 5, wherein the function key module comprises a remote control unit and a remote control,
the remote control unit is connected with the PLC controller, and the remote control unit is connected with the remote control unit in a wireless communication mode.
7. The lightning current surge testing system of any of claims 1 to 5, further comprising a measurement display module;
the lightning current generating device also comprises a voltage sampling unit, wherein the voltage sampling unit comprises a voltage sampling end, a grounding end and a sampling voltage signal output end;
the voltage sampling end is connected with the energy storage module, and the sampling voltage signal output end is connected with the measurement display module.
8. The lightning current surge testing system of claim 7, further comprising a current sampling unit including a current sampling end and a sampling current signal output end;
the current sampling end is connected with the wave regulating module, and the sampling current signal output end is connected with the measurement display module.
9. The lightning current surge testing system of claim 7, further comprising a residual voltage detection unit including a detection end and a residual voltage signal output end;
the detection end is connected with the surge protector, and the residual voltage signal output end is connected with the measurement display module.
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