CN105445627A - DC system insulation inspection and acceptance instrument - Google Patents
DC system insulation inspection and acceptance instrument Download PDFInfo
- Publication number
- CN105445627A CN105445627A CN201510770806.3A CN201510770806A CN105445627A CN 105445627 A CN105445627 A CN 105445627A CN 201510770806 A CN201510770806 A CN 201510770806A CN 105445627 A CN105445627 A CN 105445627A
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- Prior art keywords
- straight
- flow system
- resistance
- instrument
- checked
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention relates to a DC system insulation inspection and acceptance instrument comprising a power source point access end used for being connected with a positive or negative power source of a DC system, a grounding point access end used for being grounded, and a resistance adjuster connected between the power source point access end and the grounding point access end. The resistance adjuster comprises an adjustable resistor body and an adjusting knob used for adjusting the resistance of the adjustable resistor body. The resistance adjuster is connected with a display for displaying the resistance. The DC system insulation inspection and acceptance instrument further comprises a portable shell, part of the resistance adjuster is arranged inside the portable shell, and the power source point access end and the grounding point access end are arranged on the portable shell. Insulation of the DC system is tested through the resistance adjuster capable of adjusting the resistance, the alarm value needing to be set in an insulation monitoring device connected with the DC system can be determined accurately, and the operation state of the DC system can be better detected. The DC system insulation inspection and acceptance instrument is simple in wiring, and safe and reliable.
Description
Technical field
The present invention relates to a kind of straight-flow system insulation for Acceptance Test of carrying out straight-flow system and the insulation monitoring and warning device that connects thereof insulating and check and accept instrument.
Background technology
In electric system, straight-flow system is the power resources of the various equipment of whole transformer station, and the fault of straight-flow system directly will seriously jeopardize the safe and stable operation of electrical network.In rainy humid area, apparatus insulated easily aging, therefore transformer station direct current system Grounding is comparatively frequent, is the principal element of DC system fault.For this reason, often overlap straight-flow system and all a set of insulation monitoring and warning device can be installed, after corresponding warning value is set in this insulation monitoring and warning device, when the insulation of straight-flow system reduces, when stake resistance is less than warning value, insulation monitoring and warning device alarm, monitors the working condition of straight-flow system with this.
For reflecting the correct warning value of insulation monitoring and warning device, to new straight-flow system of installing or run the straight-flow system of some cycles, we will carry out the test of insulation warning value to straight-flow system, and check insulation monitoring and warning device operating condition.Originally be connected on DC feeder branch road with wire one end, the mode of wire other end ground connection is tested, although insulation monitoring and warning device alarm can be made like this, but the correct warning value that cannot detect needed for insulation monitoring and warning device, and with the direct ground connection of wire, be equivalent to straight-flow system total head ground connection, easily damage caused to straight-flow system.The method of current employing uses the resistance eutral grounding of fixed resistance value (as 20k Ω) to simulate.Because resistance is fixed, this method can only observational measurement warning value, is still difficult to verify the exact value of this device warning starting value.
Summary of the invention
The object of this invention is to provide a kind of can the device of warning value in the insulation monitoring and warning device of Measurement accuracy straight-flow system.
For achieving the above object, the technical solution used in the present invention is:
Instrument is checked and accepted in a kind of straight-flow system insulation, for carrying out insulation Acceptance Test to straight-flow system and the insulation monitoring and warning device that connects thereof, described straight-flow system insulation check and accept instrument comprise positive supply for connecting described straight-flow system or negative supply power supply point incoming end, for ground connection earth point incoming end, be connected to resistance controller between described power supply point incoming end and described earth point incoming end.
Described resistance controller is that resistance value can continually varying resistance controller.
Described resistance controller comprises adjustable resistance body, for regulating the adjusting knob of the resistance value of described adjustable resistance body.
Described resistance controller is connected with the display of display resistance.
Described straight-flow system insulation is checked and accepted instrument and is also comprised portable shell, and the part of described resistance controller is arranged in described portable shell, and described power supply point incoming end and described earth point incoming end are arranged on described portable shell.
Described straight-flow system insulation is checked and accepted instrument and is also comprised system power supply.
Because technique scheme is used, the present invention compared with prior art has following advantages: the present invention carries out Insulation test by the resistance controller of adjustable resistance to straight-flow system, the warning value needing to arrange can be determined in the insulation monitoring and warning device that straight-flow system connects accurately, thus the running status of straight-flow system can be detected better, its wiring is simple, safe and reliable.
Accompanying drawing explanation
Accompanying drawing 1 is the theory diagram that instrument is checked and accepted in straight-flow system of the present invention insulation.
Accompanying drawing 2 is the panel schematic diagram that instrument is checked and accepted in straight-flow system of the present invention insulation.
In above accompanying drawing: 1, power supply point incoming end; 2, earth point incoming end; 3, resistance controller; 4, liquid crystal display; 5, portable shell; 6, adjusting knob; 7, power switch.
Embodiment
Below in conjunction with embodiment shown in the drawings, the invention will be further described.
Embodiment one: as shown in Figures 1 and 2, instrument is checked and accepted in a kind of straight-flow system insulation for Acceptance Test of carrying out straight-flow system and the insulation monitoring and warning device that connects thereof insulating, comprise power supply point incoming end 1, earth point incoming end 2 and resistance value can continually varying resistance controllers 3.
Power supply point incoming end 1 is for connecting positive supply or the negative supply of straight-flow system, and earth point incoming end 2 is for connecting substation grounding copper bar and ground connection.Resistance controller 3 is connected between power supply point incoming end 1 and earth point incoming end 2, and it comprises adjustable resistance body, for regulating the adjusting knob 6 of the resistance value of adjustable resistance body.This resistance controller 3 is connected with the liquid crystal display 4 for showing its resistance.The insulation of this straight-flow system is checked and accepted instrument and is also comprised a portable shell 5, the adjustable resistance body part of resistance controller 3 is arranged in portable shell 5, and the adjusting knob 6 of power supply point incoming end 1, earth point incoming end 2, resistance controller 3 and liquid crystal display 4 are arranged on portable shell 5.The insulation of this straight-flow system is checked and accepted instrument and is also comprised system power supply.
When performing a test, any side of positive and negative power supply test lead of transformer station direct current system is received the power supply point incoming end 1 that instrument is checked and accepted in straight-flow system insulation, the earth point incoming end 2 that instrument is checked and accepted in straight-flow system insulation is connected on substation grounding copper bar with test lead.Open the power switch 7 that instrument is checked and accepted in straight-flow system insulation, rotate the adjusting knob 6 of resistance controller 3, input resistance is consecutive variations from large to small.When resistance controller 3 rotates to somewhere, the insulation monitoring and warning device alarm of straight-flow system, records the resistance value that now liquid crystal display 4 shows, is the insulation monitoring and warning device alarm initiation value of straight-flow system.So namely, by starting value and the rreturn value of the resistance Measurement accuracy insulation monitoring and warning device alarm of adjusting resistance regulator 3, wiring is simple, safe and reliable.Realize insulation monitoring and warning device warning value by qualitative analysis to determining quantitative analysis, the health better detecting straight-flow system is run.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (6)
1. instrument is checked and accepted in a straight-flow system insulation, for carrying out insulation Acceptance Test to straight-flow system and the insulation monitoring and warning device that connects thereof, it is characterized in that: described straight-flow system insulation check and accept instrument comprise positive supply for connecting described straight-flow system or negative supply power supply point incoming end, for ground connection earth point incoming end, be connected to resistance controller between described power supply point incoming end and described earth point incoming end.
2. instrument is checked and accepted in straight-flow system insulation according to claim 1, it is characterized in that: described resistance controller is that resistance value can continually varying resistance controller.
3. instrument is checked and accepted in straight-flow system insulation according to claim 1, it is characterized in that: described resistance controller comprises adjustable resistance body, for regulating the adjusting knob of the resistance value of described adjustable resistance body.
4. instrument is checked and accepted in the straight-flow system insulation according to claim 1 or 2 or 3, it is characterized in that: described resistance controller is connected with the display of display resistance.
5. instrument is checked and accepted in straight-flow system insulation according to claim 1, it is characterized in that: described straight-flow system insulation is checked and accepted instrument and also comprised portable shell, the part of described resistance controller is arranged in described portable shell, and described power supply point incoming end and described earth point incoming end are arranged on described portable shell.
6. instrument is checked and accepted in straight-flow system insulation according to claim 1, it is characterized in that: described straight-flow system insulation is checked and accepted instrument and also comprised system power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510770806.3A CN105445627B (en) | 2015-11-12 | 2015-11-12 | Instrument is checked and accepted in straight-flow system insulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510770806.3A CN105445627B (en) | 2015-11-12 | 2015-11-12 | Instrument is checked and accepted in straight-flow system insulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105445627A true CN105445627A (en) | 2016-03-30 |
| CN105445627B CN105445627B (en) | 2018-03-27 |
Family
ID=55556054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510770806.3A Active CN105445627B (en) | 2015-11-12 | 2015-11-12 | Instrument is checked and accepted in straight-flow system insulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105445627B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107015104A (en) * | 2017-05-25 | 2017-08-04 | 广东电网有限责任公司惠州供电局 | A kind of DC system grounding signal tester |
| CN110045312A (en) * | 2019-05-24 | 2019-07-23 | 广东电网有限责任公司 | A kind of calibration equipment of insulating monitor |
| CN113589210A (en) * | 2021-08-27 | 2021-11-02 | 广东电网有限责任公司 | Portable grounding test device and method for DC power supply system for plant station |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87206361U (en) * | 1987-04-16 | 1988-03-23 | 张世昌 | Monitor for insulation of electric appliances |
| CN2125148U (en) * | 1992-07-18 | 1992-12-16 | 北京电器研究所 | Electronic insulating monitor |
| CN2171872Y (en) * | 1993-09-15 | 1994-07-13 | 童新 | Multifunction high-voltage leakage current direct tester |
| JP2003028915A (en) * | 2001-07-10 | 2003-01-29 | Kikusui Electr0Nics Corp | Withstand voltage testing device |
| CN2565028Y (en) * | 2002-08-27 | 2003-08-06 | 北京华星恒业电气设备有限公司 | Module for detecting insulation resistance of DC system |
| CN202903953U (en) * | 2012-09-04 | 2013-04-24 | 博爱县电业公司 | Multi-purpose insulation detecting device |
-
2015
- 2015-11-12 CN CN201510770806.3A patent/CN105445627B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87206361U (en) * | 1987-04-16 | 1988-03-23 | 张世昌 | Monitor for insulation of electric appliances |
| CN2125148U (en) * | 1992-07-18 | 1992-12-16 | 北京电器研究所 | Electronic insulating monitor |
| CN2171872Y (en) * | 1993-09-15 | 1994-07-13 | 童新 | Multifunction high-voltage leakage current direct tester |
| JP2003028915A (en) * | 2001-07-10 | 2003-01-29 | Kikusui Electr0Nics Corp | Withstand voltage testing device |
| CN2565028Y (en) * | 2002-08-27 | 2003-08-06 | 北京华星恒业电气设备有限公司 | Module for detecting insulation resistance of DC system |
| CN202903953U (en) * | 2012-09-04 | 2013-04-24 | 博爱县电业公司 | Multi-purpose insulation detecting device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107015104A (en) * | 2017-05-25 | 2017-08-04 | 广东电网有限责任公司惠州供电局 | A kind of DC system grounding signal tester |
| CN110045312A (en) * | 2019-05-24 | 2019-07-23 | 广东电网有限责任公司 | A kind of calibration equipment of insulating monitor |
| CN113589210A (en) * | 2021-08-27 | 2021-11-02 | 广东电网有限责任公司 | Portable grounding test device and method for DC power supply system for plant station |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105445627B (en) | 2018-03-27 |
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