CN204086512U - A kind of portable simulation resistor for Insulation Inspection Device for Direct-Current System verification - Google Patents

A kind of portable simulation resistor for Insulation Inspection Device for Direct-Current System verification Download PDF

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Publication number
CN204086512U
CN204086512U CN201420518799.9U CN201420518799U CN204086512U CN 204086512 U CN204086512 U CN 204086512U CN 201420518799 U CN201420518799 U CN 201420518799U CN 204086512 U CN204086512 U CN 204086512U
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China
Prior art keywords
resistance
wire
current
direct
wire column
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CN201420518799.9U
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Chinese (zh)
Inventor
葛晶
余杰
沈丹
周进
何祺旻
郑志光
马史栋
刘能
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State Grid Corp of China SGCC
State Grid Zhejiang Electric Power Co Ltd
Shaoxing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Zhejiang Electric Power Co Ltd
Shaoxing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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Abstract

The utility model discloses a kind of portable simulation resistor for Insulation Inspection Device for Direct-Current System verification, comprise box body, be arranged on 8 wire columns on box body, be arranged on 7 resistance of mutually connecting in box body, for connecting the shorting stub of two wire columns, and for connecting the connecting line of wire column and Insulation Inspection Device for Direct-Current System, the bottom of each wire column is connected with the wire between adjacent two resistance respectively, and the top of each wire column is exposed at outside box body.When above-mentioned portable simulation resistor uses, be connected with Insulation Inspection Device for Direct-Current System by the wire column of connecting line by correspondence, two different wire columns are connected by shorting stub, finally by the permutation and combination of different resistance values, the resistance of various resistance can be simulated, in D.C. isolation monitoring device test process, the resistance value of needs can be transferred to quickly and easily, verify the reliable of insulation monitoring and warning device quickly and accurately, substantially increase D.C. isolation device verification speed and accuracy.

Description

A kind of portable simulation resistor for Insulation Inspection Device for Direct-Current System verification
Technical field
The utility model relates to a kind of portable simulation resistor for Insulation Inspection Device for Direct-Current System verification, belongs to technical field of power systems.
Background technology
Straight-flow system, as the main power source system of transformer station, is responsible for and uninterruptedly provides reliable galvanic effect to miscellaneous equipment, and straight-flow system mainly comprises charging screen, feed panel, accumulator.Insulation monitoring and warning device wherein in feed panel is mainly through automatically measuring insulation resistance resistance to differentiate insulation status in whole electric system (comprising the DC ground fault because a variety of causes causes and the situation such as low that insulate), for fast finding trouble spot, remove a hidden danger in time, improve straight-flow system safety coefficient, therefore, the reliability of insulation monitoring and warning device directly has influence on the safe operation of electric system, before straight-flow system drops into, runs when inspecting and effectively differentiates that its reliability then becomes examinations, overhauls the leading indicator of insulation monitoring and warning device.
Because electric system DC voltage level is different, comprise 220V, 110V, 48V etc., for the straight-flow system of different electric pressure, the stake resistance working value of insulation monitoring and warning device DC ground fault signal is also different, 220V system earth resistance working value is 25 kilo-ohms, 110V system is 7 kilo-ohms, 48V system is 1.7 kilo-ohms (sometimes also not identical according to the grounding resistance of different electric power standard identical electric pressure straight-flow system), current Insulation Inspection Device for Direct-Current System extensively adopts balance bridge principle to monitor DC earthing as shown in Figure 1: resistance R1 ' in figure, R2 ' and relay J are the elementary cells of composition insulation monitoring and warning device, usual R1 ' is equal with R2 ' resistance value, be 1K Ω, relay J selects DC low current relay, resistance R+ and R-is the resistance to earth of straight-flow system positive pole and negative pole respectively.Under normal circumstances, R+ and R-is infinity, insulation monitoring and warning device not alarm, only have when occurring DC earthing in system or in the low situation that insulate, just accuse insulation low signal, therefore put into operation in electric substation, in the straight-flow system course of receiving, then need to insulation monitoring and warning device series resistor R ' in order to verify the accuracy of insulation monitoring and warning device warning value, therefore multiple resistance value is needed for same electric pressure to test, in this case, the resistance carrying all different numerical value is all needed before each test, and all scattered placement of all resistance, this not only increases labor capacity, also increase the probability that parts are lost, to manpower, material resources cause certain waste.
In view of this, the present inventor studies this, and develop a kind of portable adjustable simulation resistor for Insulation Inspection Device for Direct-Current System verification specially, this case produces thus.
Utility model content
The purpose of this utility model is to provide a kind of portable adjustable simulation resistor for Insulation Inspection Device for Direct-Current System verification, and easy to carry, resistance is adjustable, greatly can improve insulation monitoring and warning device insulating resistance value testing efficiency.
To achieve these goals, solution of the present utility model is:
A kind of portable adjustable simulation resistor for Insulation Inspection Device for Direct-Current System verification, comprise box body, be arranged on 8 wire columns on box body, be arranged on 7 resistance of mutually connecting in box body, for connecting the shorting stub of two wire columns, and for connecting the connecting line of wire column and Insulation Inspection Device for Direct-Current System, the bottom of each wire column is connected with the wire between adjacent two resistance respectively, the top of each wire column is exposed at outside box body, and described resistance comprises the first resistance that resistance is 1.5K Ω, resistance is second resistance of 2K Ω, resistance is the 3rd resistance of 3K Ω, resistance is the 4th resistance of 9K Ω, resistance is the 5th resistance of 10K Ω, 7th resistance of resistance to be the 6th resistance of 15K Ω and resistance be 20K Ω, described wire column comprises and is successively set on the first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, the second wire column between 6th resistance and the 7th resistance, privates post, privates post, 5th wire column, 6th wire column, 7th wire column, and be arranged on the first resistance top, first wire column of the 7th resistance end and the 8th wire column.
When the above-mentioned portable adjustable simulation resistor for Insulation Inspection Device for Direct-Current System verification uses, be connected with Insulation Inspection Device for Direct-Current System by the wire column of connecting line by correspondence, two different wire columns are connected by shorting stub, and then the resistance between these two wire columns is carried out short circuit, finally by the permutation and combination of different resistance values, the resistance of various resistance can be simulated, the resistance value of needs can be transferred to quickly and easily in D.C. isolation monitoring device test process, and receive analog DC ground connection in DC feeder branch road, verify the reliable of insulation monitoring and warning device quickly and accurately, substantially increase D.C. isolation device verification speed and accuracy.
Below in conjunction with the drawings and the specific embodiments, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is Insulation Inspection Device for Direct-Current System of the prior art verification schematic diagram;
Fig. 2 is the portable adjustable simulation resistor front elevation of the present embodiment;
Fig. 3 is the portable adjustable simulation resistor electrical schematic diagram of the present embodiment;
Fig. 4 is the Insulation Inspection Device for Direct-Current System verification schematic diagram of the present embodiment.
Embodiment
As shown in Figure 2, a kind of portable adjustable simulation resistor for Insulation Inspection Device for Direct-Current System verification, comprise box body 1, be arranged on 8 wire columns on box body, be arranged on 7 resistance of mutually connecting in box body 1, for connecting the shorting stub 2 of two wire columns, and for connecting the connecting line 3 of wire column and Insulation Inspection Device for Direct-Current System, the bottom of each wire column is connected with the wire between adjacent two resistance respectively, the top of each wire column is exposed at outside box body, and described resistance comprises the first resistance R1 that resistance is 1.5K Ω, resistance is the second resistance R2 of 2K Ω, resistance is the 3rd resistance R3 of 3K Ω, resistance is the 4th resistance R4 of 9K Ω, resistance is the 5th resistance R5 of 10K Ω, the 7th resistance R7 of resistance to be the 6th resistance R6 of 15K Ω and resistance be 20K Ω, described wire column comprises and is successively set on the first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, 5th resistance R5, the second wire column 4b between 6th resistance R6 and the 7th resistance R7, privates post 4c, privates post 4d, 5th wire column 4e, 6th wire column 4f, 7th wire column 4g, and be arranged on the first resistance R1 top, first wire column 4a of the 7th resistance R7 end and the 8th wire column 4h.
As shown in Figure 3, when shorting stub 2 is inserted between the 3rd binding post 4c and the 8th binding post 4h, then the 3rd resistance R3 ~ the 7th resistance R7 is 0 by short circuit resistance, first binding post 4a and the 8th binding post 4h draws resistance calculations: R1+R2+0=1.5K+2K+0=3.5K, therefore the portable adjustable simulation resistor of this Insulation Inspection Device for Direct-Current System verification, available resistance value comprises (following unit is K Ω):
1.5+2=3.5 2+3=5 3+9=12 9+10=19 10+15=25
1.5+3=4.5 2+9=11 3+10=13 9+15=24 10+20=30
1.5+9=10.5 2+10=12 3+15=18 9+20=29 15+20=35
1.5+10=11.5 2+15=17 3+20=23
1.5+15=16.5 2+20+22
1.5+20=21.5
1.5+2+3=6.5
1.5+2+3+9=15.5
1.5+2+3+9+10=25.5
1.5+2+3+9+10+15=40.5
1.5+2+3+9+10+15+20=60.5
2+3+9=14
2+3+9+10=24
2+3+9+10+15=39
2+3+9+10+15+20=59
3+9+10=22
3+9+10+15=37
3+9+10+15+20=57
9+10+15=34
9+10+15+20=54
10+15+20=45
From above resistance value, some shorting stubs are utilized to insert different binding posts, resistance between short circuit insertion point, or directly extract any two binding posts, above 36 kinds of resistance values can be simulated, add between every two binding posts, the 1.5K Ω itself had separately, 2K Ω, 3K Ω, 9K Ω, 10K Ω, 15K Ω, 20K Ω resistance, portable adjustable simulation resistor then described in the present embodiment can simulate altogether 43 kinds of resistance values, for the Insulation Inspection Device for Direct-Current System of various criterion and different electric pressure, all portablely can effectively utilize different numerical value resistance verification straight-flow system seal alarm working value.
Adopt the portable adjustable simulation resistor verification Insulation Inspection Device for Direct-Current System method described in the present embodiment as follows, as shown in Figure 4, consistent with verification straight-flow system negative pole F ground connection principle owing to testing straight-flow system positive pole E ground connection, and for the Insulation Inspection Device for Direct-Current System J of various criterion and different electric pressure, as long as change resistance of the present utility model combination can realize as described above, therefore with analog DC system insulation device alarm resistance value for 25K Ω, straight-flow system plus earth is that example illustrates, method of operating is as follows:
Because straight-flow system seal J alarm resistance value is 25K Ω, then extract the resistance between portable simulation resistor the 5th binding post 4e and the 7th binding post 4g, as above narrate, between the 5th binding post 4e and the 7th binding post 4g, resistance is R5+R6=10K+15K=25K, 5th binding post 4e is connected to the E point of exhausted straight-flow system, by the 7th binding post 4g to the earth point of exhausted straight-flow system, analog DC system plus earth, when now insulation monitoring and warning device J sends alarm signal, then be judged to be that insulation monitoring and warning device alarm is normal, when the non-alarm of insulation monitoring and warning device, can again test by combined resistance, until insulation monitoring and warning device alarm, resistance is now the actual warning value of insulation monitoring and warning device.
Above-described embodiment and graphic and non-limiting product form of the present utility model and style, any person of an ordinary skill in the technical field, to its suitable change done or modification, all should be considered as not departing from patent category of the present utility model.

Claims (1)

1. the portable adjustable simulation resistor for Insulation Inspection Device for Direct-Current System verification, it is characterized in that: comprise box body, be arranged on 8 wire columns on box body, be arranged on 7 resistance of mutually connecting in box body, for connecting the shorting stub of two wire columns, and for connecting the connecting line of wire column and Insulation Inspection Device for Direct-Current System, the bottom of each wire column is connected with the wire between adjacent two resistance respectively, the top of each wire column is exposed at outside box body, and described resistance comprises the first resistance that resistance is 1.5K Ω, resistance is second resistance of 2K Ω, resistance is the 3rd resistance of 3K Ω, resistance is the 4th resistance of 9K Ω, resistance is the 5th resistance of 10K Ω, 7th resistance of resistance to be the 6th resistance of 15K Ω and resistance be 20K Ω, described wire column comprises and is successively set on the first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, the second wire column between 6th resistance and the 7th resistance, privates post, privates post, 5th wire column, 6th wire column, 7th wire column, and be arranged on the first resistance top, first wire column of the 7th resistance end and the 8th wire column.
CN201420518799.9U 2014-09-10 2014-09-10 A kind of portable simulation resistor for Insulation Inspection Device for Direct-Current System verification Active CN204086512U (en)

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Application Number Priority Date Filing Date Title
CN201420518799.9U CN204086512U (en) 2014-09-10 2014-09-10 A kind of portable simulation resistor for Insulation Inspection Device for Direct-Current System verification

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420518799.9U CN204086512U (en) 2014-09-10 2014-09-10 A kind of portable simulation resistor for Insulation Inspection Device for Direct-Current System verification

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104237826A (en) * 2014-09-10 2014-12-24 国家电网公司 Portable simulation resistor for calibration of direct current system insulation monitoring device
CN107643502A (en) * 2017-09-26 2018-01-30 广西电网有限责任公司电力科学研究院 A kind of high-voltage electrical apparatus detecting instrument check device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104237826A (en) * 2014-09-10 2014-12-24 国家电网公司 Portable simulation resistor for calibration of direct current system insulation monitoring device
CN107643502A (en) * 2017-09-26 2018-01-30 广西电网有限责任公司电力科学研究院 A kind of high-voltage electrical apparatus detecting instrument check device

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