CN105301399A - Test method for overvoltage protection device to detect DC characteristics - Google Patents
Test method for overvoltage protection device to detect DC characteristics Download PDFInfo
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- CN105301399A CN105301399A CN201510739874.3A CN201510739874A CN105301399A CN 105301399 A CN105301399 A CN 105301399A CN 201510739874 A CN201510739874 A CN 201510739874A CN 105301399 A CN105301399 A CN 105301399A
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- circuit
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- overvoltage protection
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- supply module
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- 238000010998 test method Methods 0.000 title claims abstract description 10
- 238000005259 measurement Methods 0.000 claims abstract description 28
- 238000012360 testing method Methods 0.000 claims description 34
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 230000001012 protector Effects 0.000 abstract description 12
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000006378 damage Effects 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Abstract
The invention discloses a test method for overvoltage protection device to detect DC characteristics, comprising a display screen, an internal storage device, a control unit, a keyboard, a battery, an inverter power supply module, a DC power supply module, a current measurement circuit, a measurement protection circuit, a voltage measurement circuit, and a tested overvoltage protector; the control unit is connected to the display screen, the internal storage device, the control unit, the keyboard, the inverter power supply module, the DC power supply module, the current measurement circuit, the measurement protection circuit and the voltage measurement circuit; the inverter power supply module and the DC power supply module are connected to the battery; the current measurement circuit and the voltage measurement circuit are connected to the measurement protection circuit; and the voltage measurement circuit is connected to the tested object overvoltage protector. The beneficial effects of the invention are that the invention is simple in structure, easy in operation, wide in current measurement range, strong interference resistance capability, high measurement accuracy and low measurement cost.
Description
Technical field
The present invention relates to a kind of voltage protector test method, particularly a kind of overvoltage protection device detects DC characteristic test method.
Background technology
Three phase combined overvoltage protector is in order to limit lightning surge, the various transient overvoltages that may occur in Overvoltage of Vacuum Disconnectors in Operation and electric system, effectively can protect motor, transformer, switch, capacitor, cable, the insulation of the power equipments such as bus is without prejudice, all reliable restriction can be played to alternate and relatively superpotential, mainly be divided into and have series gap overvoltage protector and the large class of gapless overvoltage protector two, its pilot project content requires to use high pressure industrial frequency AC and high-voltage DC power supply respectively, special testing tool is not also had to meet test request at present.
The importance of 10kV overvoltage protection device; The various transient overvoltages that may occur in lightning surge, Overvoltage of Vacuum Disconnectors in Operation and electric system, to the generation unnecessary harm of the power equipments such as motor, transformer, switch, capacitor, cable, bus, apparatus insulated damage may be made or damages electrical equipment.As the lightning arrester of overvoltage protection; be widely used in electric system; based on its protection philosophy: be applicable to over-voltage waveform front end steep; frequency is high; but the environment that subsequent current is little; and its overvoltage protection releases with short circuit after overvoltage to realize, and is applicable to the circuit under lightning surge and equipment protection.And for the equipment protection in order to limit under the various transient overvoltages that may occur in power-frequency overvoltage in lightning surge, vacuum circuit breaker operating process and electric system, be that traditional lightning arrester is incompetent.
The meaning and value that 10kV overvoltage protection device detects: to the test of overvoltage protection device, should meet " DL/T474.5-2006 " on-the-spot Insulation Test and implement the requirement of directive/guide the 5th part test of lightning arrester.Three phase combined over-voltage protector is mainly divided into series gap overvoltage protector and the large class of gapless overvoltage protector two; its pilot project content requires to use high pressure industrial frequency AC and high-voltage DC power supply respectively, does not also have special testing tool to meet test request at present.Therefore; invent a kind of for 10kV electric pressure and following three phase combined novel overvoltage protection comprehensive detection device; for three phase combined over-voltage protector debugging and pilot project, discovering device built-in electrical insulation makes moist and the dangerous defect such as valve block is aging early.
Summary of the invention
Object of the present invention is exactly in view of the foregoing defects the prior art has, provides a kind of overvoltage protection device to detect DC characteristic test method, can be widely used in 10kV electric pressure and the following series gap three phase combined over-voltage protector that has detects.
A kind of overvoltage protection device detects DC characteristic test method, comprise the following steps: gapless type overvoltage protection device direct current 1mA reference voltage is tested, the instruction that keyboard (4) inputs is detected by control module (3), control any two-phase of direct current supply module (7) to test specimen overvoltage protection device (11) simultaneously, DC voltage is exported between any phase and ground connection, the current amplitude that current measurement circuit (8) monitoring simultaneously applies, the current stabilization of overvoltage protection device to be passed through is after 1mA, system can be cut off the output of direct current supply module (7) and automatically record now voltage value, test result is shown on display screen (1) by control module (3) simultaneously, when Leakage Current is measured, the instruction that keyboard (4) inputs is detected by control module (3), control any two-phase, arbitrarily mutually and ground connection between apply the direct current 1mA reference voltage of 0.75 times of direct current supply module (7) to test specimen overvoltage protection device (11) simultaneously, the current amplitude that current measurement circuit (8) monitoring simultaneously applies, and cut off the output of direct supply, and automatically recording now current value, test result is shown to display screen (1) by control module (3) simultaneously,
Wherein, control module (3) connects display screen (1), internal storage (2), control module (3), keyboard (4), Inverter (6), direct current supply module (7), current measurement circuit (8), measuring and protecting circuit (9) and tension measuring circuit (10) respectively, Inverter (6) is connected battery (5) respectively with direct current supply module (7), described current measurement circuit (8) is connected measuring and protecting circuit (9) with tension measuring circuit (10), and tension measuring circuit (10) connects test specimen overvoltage protection device (11);
The upside of described single-chip microcomputer connects touch LCD display, and power supply is powered by DC power-supply circuit, and DC power-supply circuit connects battery, and battery is by being connected to test specimen after 110V stepup transformer and 30KV high voltage generating circuit; Described test specimen is input to single-chip microcomputer through AD conversion by voltage, current sampling signal after amplifying.
Above-mentioned battery is connected with external power supply by charging circuit.
The invention has the beneficial effects as follows: structure is simple, easy and simple to handle, have and measure the features such as range of current is wide, antijamming capability is strong, measurement accuracy is high, measurement cost is low, 10kV electric pressure can be widely used in and the following series gap three phase combined over-voltage protector that has detects, rapid to gapless type overvoltage protection device direct current 1mA reference voltage test response, the overvoltage impact to three-phase overvoltage protection device when effectively reducing test; DC inversion technology is adopted to realize powered battery to the test of three-phase overvoltage protection device DC characteristic, the overvoltage impact of corresponding three-phase overvoltage protection device when effectively reducing rapidly test when simultaneously measuring.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present invention;
Accompanying drawing 2 is DC characteristic test principle figure of the present invention;
In upper figure: display screen 1, internal storage 2, control module 3, keyboard 4, battery 5, Inverter 6, direct current supply module 7, current measurement circuit 8, measuring and protecting circuit 9, tension measuring circuit 10, test specimen overvoltage protection device 11.
Embodiment
1-2 by reference to the accompanying drawings, the invention will be further described:
A kind of overvoltage protection device that the present invention mentions detects DC characteristic test method, comprise the following steps: gapless type overvoltage protection device direct current 1mA reference voltage is tested, the instruction that keyboard 4 inputs is detected by control module 3, control any two-phase of direct current supply module 7 to test specimen overvoltage protection device 11 simultaneously, DC voltage is exported between any phase and ground connection, current measurement circuit 8 monitors the current amplitude applied simultaneously, the current stabilization of overvoltage protection device to be passed through is after 1mA, system can be cut off the output of direct current supply module 7 and automatically record now voltage value, test result is shown on display screen 1 by control module 3 simultaneously, when Leakage Current is measured, the instruction that keyboard 4 inputs is detected by control module 3, control any two-phase, arbitrarily mutually and ground connection between apply the direct current 1mA reference voltage of 0.75 times of direct current supply module 7 to test specimen overvoltage protection device 11 simultaneously, current measurement circuit 8 monitors the current amplitude applied simultaneously, and cut off the output of direct supply, and automatically recording now current value, test result is shown to display screen 1 by control module 3 simultaneously,
Wherein, control module 3 connects display screen 1, internal storage 2, control module 3, keyboard 4, Inverter 6, direct current supply module 7, current measurement circuit 8, measuring and protecting circuit 9 and tension measuring circuit 10 respectively, Inverter 6 is connected battery 5 respectively with direct current supply module 7, described current measurement circuit 8 is connected measuring and protecting circuit 9 with tension measuring circuit 10, and tension measuring circuit 10 connects test specimen overvoltage protection device 11;
The upside of described single-chip microcomputer connects touch LCD display, and power supply is powered by DC power-supply circuit, and DC power-supply circuit connects battery, and battery is by being connected to test specimen after 110V stepup transformer and 30KV high voltage generating circuit; Described test specimen is input to single-chip microcomputer through AD conversion by voltage, current sampling signal after amplifying.
Above-mentioned direct current supply module 7 comprises 110V stepup transformer series connection 30KV high voltage generating circuit; Described battery is connected with external power supply by charging circuit.
The above, be only part preferred embodiment of the present invention, any those of ordinary skill in the art all may utilize the technical scheme correct of above-mentioned elaboration or are revised as equivalent technical scheme.Therefore, any simple modification of carrying out according to technical scheme of the present invention or substitute equivalents, belong to the scope of protection of present invention to the greatest extent.
Claims (2)
1. an overvoltage protection device detects DC characteristic test method, it is characterized in that: comprise the following steps: gapless type overvoltage protection device direct current 1mA reference voltage is tested, the instruction that keyboard (4) inputs is detected by control module (3), control any two-phase of direct current supply module (7) to test specimen overvoltage protection device (11) simultaneously, DC voltage is exported between any phase and ground connection, the current amplitude that current measurement circuit (8) monitoring simultaneously applies, the current stabilization of overvoltage protection device to be passed through is after 1mA, system can be cut off the output of direct current supply module (7) and automatically record now voltage value, test result is shown on display screen (1) by control module (3) simultaneously, when Leakage Current is measured, the instruction that keyboard (4) inputs is detected by control module (3), control any two-phase, arbitrarily mutually and ground connection between apply the direct current 1mA reference voltage of 0.75 times of direct current supply module (7) to test specimen overvoltage protection device (11) simultaneously, the current amplitude that current measurement circuit (8) monitoring simultaneously applies, and cut off the output of direct supply, and automatically recording now current value, test result is shown to display screen (1) by control module (3) simultaneously,
Wherein, control module (3) connects display screen (1), internal storage (2), control module (3), keyboard (4), Inverter (6), direct current supply module (7), current measurement circuit (8), measuring and protecting circuit (9) and tension measuring circuit (10) respectively, Inverter (6) is connected battery (5) respectively with direct current supply module (7), described current measurement circuit (8) is connected measuring and protecting circuit (9) with tension measuring circuit (10), and tension measuring circuit (10) connects test specimen overvoltage protection device (11);
The upside of described single-chip microcomputer connects touch LCD display, and power supply is powered by DC power-supply circuit, and DC power-supply circuit connects battery, and battery is by being connected to test specimen after 110V stepup transformer and 30KV high voltage generating circuit; Described test specimen is input to single-chip microcomputer through AD conversion by voltage, current sampling signal after amplifying.
2. overvoltage protection device according to claim 1 detects DC characteristic test method, it is characterized in that: described battery is connected with external power supply by charging circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510739874.3A CN105301399A (en) | 2015-11-04 | 2015-11-04 | Test method for overvoltage protection device to detect DC characteristics |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510739874.3A CN105301399A (en) | 2015-11-04 | 2015-11-04 | Test method for overvoltage protection device to detect DC characteristics |
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| Publication Number | Publication Date |
|---|---|
| CN105301399A true CN105301399A (en) | 2016-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510739874.3A Pending CN105301399A (en) | 2015-11-04 | 2015-11-04 | Test method for overvoltage protection device to detect DC characteristics |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105929292A (en) * | 2016-07-13 | 2016-09-07 | 国网山东省电力公司东营供电公司 | Three-phase overvoltage protection device comprehensive detection apparatus and method |
-
2015
- 2015-11-04 CN CN201510739874.3A patent/CN105301399A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105929292A (en) * | 2016-07-13 | 2016-09-07 | 国网山东省电力公司东营供电公司 | Three-phase overvoltage protection device comprehensive detection apparatus and method |
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Application publication date: 20160203 |