CN201812018U - Multipoint grounding finding instrument of relay protector - Google Patents
Multipoint grounding finding instrument of relay protector Download PDFInfo
- Publication number
- CN201812018U CN201812018U CN2010205661084U CN201020566108U CN201812018U CN 201812018 U CN201812018 U CN 201812018U CN 2010205661084 U CN2010205661084 U CN 2010205661084U CN 201020566108 U CN201020566108 U CN 201020566108U CN 201812018 U CN201812018 U CN 201812018U
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- signal processor
- communicated
- digital signal
- conversion module
- digital conversion
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Abstract
The utility model relates to a multipoint grounding finding instrument of a relay protector. Two terminals E and L are arranged on an insulation resistance measuring module which is communicated with a digital signal processor (DSP) through a signal wire, a terminal I is arranged on an amperage analog to digital conversion module, a terminal U is arranged on a voltage analog to digital conversion module, the amperage analog to digital conversion module and the voltage analog to digital conversion module are connected in parallel and are communicated with the digital signal processor (DSP) through a signal wire, terminals N and N'' are arranged on a built-in power resistance switching module, the built-in power resistance switching module is communicated with the digital signal processor (DSP) after being connected in series with the amperage analog to digital conversion module, input equipment is communicated with the digital signal processor (DSP) through a signal wire, the digital signal processor (DSP) is communicated with outwards output equipment, and all modules, the digital signal processor (DSP), a liquid crystal display and a miniature thermal printer all adopt a power supply system to provide electric power. The multipoint grounding finding instrument is convenient to use and can fast and accurately inquire circuits in a secondary loop.
Description
Technical field:
The utility model relates to the multipoint earthing of protective relaying device to be searched, and particularly a kind of multipoint earthing of protective relaying device is searched instrument.
Background technology:
The secondary device wiring is comparatively complicated in electric system, and safe operation plays important effect to secondary circuit to safeguards system.Protective relaying device is the important assurance of safeguarding power network safety operation.The correct running that how to guarantee protective relaying device is an important process problem in the electric power system; and to guarantee the correct running of protective relaying device; just must guarantee that the relevant secondary circuit of relay protection is correct; but because secondary circuit wiring complexity; the protective relaying maloperation that easily exists reasons such as parasitic loop, false wiring to cause has become the principal element of power grid accident; wherein there are the situation of multipoint earthing in voltage circuit, electric current secondary loop, and this has caused very big difficulty for the correct running that guarantees protective relaying device.
Summary of the invention:
The purpose of this utility model is that a kind of multipoint earthing of in-problem protective relaying device of whether searching fast and accurately in the secondary circuit of design is searched instrument.The technical solution of the utility model is; a kind of multipoint earthing of protective relaying device is searched instrument; it comprises power-supply system; it is characterized in that: on the insulation measurement module, be provided with two terminals of E and L; the insulation measurement module is communicated with digital signal processor DSP by signal wire; on magnitude of current analog-to-digital conversion module, be provided with the I terminal; on the voltage analog-to-digital conversion module, be provided with the U terminal; magnitude of current analog-to-digital conversion module and the parallel connection of voltage analog-to-digital conversion module; and be communicated with digital signal processor DSP by signal wire; on built-in power resistance handover module, be provided with N and N " terminal; built-in power resistance handover module and magnitude of current analog-to-digital conversion module series connection back and digital signal processor DSP are communicated with; keyboard; the mouse input equipment is communicated with digital signal processor DSP by signal wire; the equipment that digital signal processor DSP is communicated with outwards output has LCD and minitype thermal printer, each above-mentioned module; digital signal processor DSP; LCD and minitype thermal printer provide electric power by power-supply system.The utility model circuit easy to use, that inquire about in the secondary circuit is quick, accurate.
Description of drawings:
Accompanying drawing is circuit theory diagrams of the present utility model.
Embodiment:
Describe present embodiment in conjunction with the accompanying drawings in detail, structure of the present utility model is to be provided with E and two terminals of L on insulation measurement module 10, the insulation measurement module is communicated with digital signal processor DSP 2 by signal wire, on magnitude of current analog-to-digital conversion module 9, be provided with the I terminal, on voltage analog-to-digital conversion module 8, be provided with the U terminal, magnitude of current analog-to-digital conversion module and the parallel connection of voltage analog-to-digital conversion module, and be communicated with digital signal processor DSP by signal wire, on built-in power resistance handover module 7, be provided with N and N " terminal; built-in power resistance handover module and magnitude of current analog-to-digital conversion module 5 series connection backs and digital signal processor DSP are communicated with; keyboard; mouse input equipment 6 is communicated with digital signal processor DSP by signal wire; the equipment that digital signal processor DSP is communicated with outwards output has LCD 3 and minitype thermal printer, each above-mentioned module; digital signal processor DSP, LCD and minitype thermal printer and provide electric power by power-supply system 1.
When the utility model uses, E, L terminal use when insulating for the survey time road, but insulate between the survey time road, also can survey time road insulation against ground, when insulating between the survey time road, E, L connect respectively two loops (for example: survey～A ,～insulate between the B, then E connects～A, and L connects～B, on the contrary also can) during survey time road insulation against ground, E ground connection, L connects tested loop; N, N " when surveying the secondary circuit multipoint earthing, N connects CT (current transformer) or PT (voltage transformer (VT)) N phase, (for example CT:N411 or N421 and so on, PT:N600) N " ground connection, and measure when whether having multipoint earthing, only need to measure CT, PT and get final product.
Whether the utility model is convenient to use, have problems in the middle of can measuring secondary circuit accurately, greatly reduces working strength of workers, has improved work efficiency.
Claims (1)
1. the multipoint earthing of a protective relaying device is searched instrument; it comprises power-supply system; it is characterized in that: on the insulation measurement module, be provided with two terminals of E and L; the insulation measurement module is communicated with digital signal processor DSP by signal wire; on magnitude of current analog-to-digital conversion module, be provided with the I terminal; on the voltage analog-to-digital conversion module, be provided with the U terminal; magnitude of current analog-to-digital conversion module and the parallel connection of voltage analog-to-digital conversion module; and be communicated with digital signal processor DSP by signal wire; on built-in power resistance handover module, be provided with N and N " terminal; built-in power resistance handover module and magnitude of current analog-to-digital conversion module series connection back and digital signal processor DSP are communicated with; keyboard; the mouse input equipment is communicated with digital signal processor DSP by signal wire; the equipment that digital signal processor DSP is communicated with outwards output has LCD and minitype thermal printer, each above-mentioned module; digital signal processor DSP; LCD and minitype thermal printer provide electric power by power-supply system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205661084U CN201812018U (en) | 2010-10-12 | 2010-10-12 | Multipoint grounding finding instrument of relay protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205661084U CN201812018U (en) | 2010-10-12 | 2010-10-12 | Multipoint grounding finding instrument of relay protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201812018U true CN201812018U (en) | 2011-04-27 |
Family
ID=43894959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205661084U Expired - Fee Related CN201812018U (en) | 2010-10-12 | 2010-10-12 | Multipoint grounding finding instrument of relay protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201812018U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565608A (en) * | 2011-12-19 | 2012-07-11 | 甘肃省电力公司金昌供电公司 | Multipoint grounding seeking instrument of voltage transformer |
| CN103487713A (en) * | 2013-09-23 | 2014-01-01 | 国家电网公司 | Multipoint earthing trouble shooting equipment for substation voltage transformer secondary circuit |
-
2010
- 2010-10-12 CN CN2010205661084U patent/CN201812018U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565608A (en) * | 2011-12-19 | 2012-07-11 | 甘肃省电力公司金昌供电公司 | Multipoint grounding seeking instrument of voltage transformer |
| CN103487713A (en) * | 2013-09-23 | 2014-01-01 | 国家电网公司 | Multipoint earthing trouble shooting equipment for substation voltage transformer secondary circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110427 Termination date: 20111012 |