CN203658510U - Voltage transformer secondary circuit grounding detector - Google Patents
Voltage transformer secondary circuit grounding detector Download PDFInfo
- Publication number
- CN203658510U CN203658510U CN201320767305.6U CN201320767305U CN203658510U CN 203658510 U CN203658510 U CN 203658510U CN 201320767305 U CN201320767305 U CN 201320767305U CN 203658510 U CN203658510 U CN 203658510U
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- CN
- China
- Prior art keywords
- voltage transformer
- transformer secondary
- secondary circuit
- detector
- circuit
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 230000015556 catabolic process Effects 0.000 claims description 5
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical group [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 4
- 230000000007 visual effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 101000579647 Penaeus vannamei Penaeidin-2a Proteins 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229960001296 zinc oxide Drugs 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a voltage transformer secondary circuit grounding detector, and uses a current measurement principle. A front panel is provided with an AC ampere meter indicating unit, an isolating switch control unit and a measuring hole, and is used to lead out a detection pen clip; a side panel is a lightning arrester insurance replacement kit, and is internally a detection circuit; when the side panel is used, two ends of a zero phase miniature bus grounding wire are released to introduce the detection pen clip; and an isolating switch opens and closes, so that current value changes before and after opening and closing can be observed, and the rapid determination objective is realized. The voltage transformer secondary circuit grounding detector can separately measure different branches, gradually investigate grounding failure points, and narrow the measurement range so as to quickly find the grounding wire; and the voltage transformer secondary circuit grounding detector is compact in appearance and convenient to be carried by hands, is visual and efficient, and is worthy of promotion and use.
Description
Technical field
The utility model relates to checkout equipment technical field power ground, relates in particular to a kind of Multiple Earth in Voltage Transformer Secondary Circuit detector.
Background technology
Voltage transformer (VT) is the same with numerous electrical equipments, not allow short circuit, therefore must be through zero mutually little bus one point earth in pulpit in secondary circuit, prevent that high voltage from channeling to secondary side, if but earth point has two places or many places, the mistake of polarity, phase place be will cause, secondary coil of voltage transformer short circuit and scaling loss caused.
In actual motion, due to reasons such as design, construction and secondary device are aging, insulation breakdowns, often there will be or multipoint earthing phenomenon at 2.In the process searching problem, need to investigate one by one each screen and terminal box, work place is many, and workload is large, often can not investigate in time danger, and not only impact protection instrument action, also may cause device damage and accident of human electric shock.
Utility model content
The purpose of this utility model is to provide a kind of Multiple Earth in Voltage Transformer Secondary Circuit detector, and its outward appearance is small and exquisite, facilitates palm to carry, and uses with simple to operate, can realize fast measuring ability.
For achieving the above object, technical solution adopted in the utility model is: a kind of Multiple Earth in Voltage Transformer Secondary Circuit detector, comprise detector body and external measuring pen, described detector body comprises alternating current ammeter, disconnector, detection resistance, two measured holes and lightning arrester safety box, described detection resistance and disconnector form parallel circuit, described parallel circuit and alternating current ammeter form series circuit, and described series circuit is in parallel with lightning arrester safety box.
Described external measuring pen is cable clamp structure, and described lightning arrester is zinc paste breakdown fuse.
While measurement, with measuring pen wire clamp connection zero mutually little bus one point earth terminal that line connects, then untie zero mutually little busbar grounding line two ends.
Disconnector is carried out to folding operation, read respectively the reometer indicating value of folding front and back, and twice reometer indicating value compared; If substantially constant circuit is normal, more there is multipoint earthing if change, judge whether to exist fault with this; If there is fault ground situation, measuring instrument progressively can be introduced to subordinate's branch road, utilize said method failure judgement whether to occur in surveyed branch road, so that finally find ground connection branch road, earth point is removed.
The circuit that the utility model only consists of simple electronic component connects, and does not introduce other complex logic computing module, has realized fast finding and judgement to ground connection problem points, has feature efficiently directly perceived, is worthy to be popularized and uses.
Brief description of the drawings
Fig. 1 is the utility model front appearance schematic diagram.
Fig. 2 is the utility model back side cut-away view.
Fig. 3 is the utility model basic circuit diagram.
Embodiment
As shown in Figure 1, 2, a kind of Multiple Earth in Voltage Transformer Secondary Circuit detector, comprise detector body 1 and external measuring pen 2, described detector body 1 comprises alternating current ammeter 3, disconnector 4, detect resistance 5, two measured holes 6 and lightning arrester safety boxs 7, described detection resistance 5 forms parallel circuit with disconnector 4, described parallel circuit and alternating current ammeter 3 form series circuit, and described series circuit is in parallel with lightning arrester safety box 7.
Described external measuring pen nib is wire clamp 8 structures, and described lightning arrester is zinc paste breakdown fuse 9.
Detect basic circuit diagram, as shown in Figure 3, desirable detection resistance R is the measuring resistance of 10 Ω, and reometer PA is that range 0 to 200 mA exchanges pointer type reometer, and Zinc-Oxide Arrester F is specified 380V breakdown fuse.
Before measuring, external detector measuring pen 2 need to be inserted to measured hole, and it is good to check whether lightning arrester insurance 9 contacts, while measurement, connect zero mutually little bus one point earth terminal that line connects with measuring pen wire clamp 8, then untie zero mutually little busbar grounding line two ends.
First carry out the closed procedure of disconnector 4, now detect resistance 5 and be not connected in testing circuit, reometer is equivalent to measure the electric current of former one point earth line, reads now reometer indicating value, can be designated as I1; Next carry out the opening operation of disconnector 5, be about to detect resistance 5 and be connected into testing circuit, electric current is equivalent to former one point earth line serial connection and detects the electric current after resistance R, reads now reometer indicating value, can be designated as I2; Twice reometer indicating value compared, if reometer indicating value is substantially constant, represent that circuit is normal, only have one point earth, more represent to have fault if change, have or multipoint earthing at 2; If there is fault ground situation, measuring instrument progressively can be introduced to subordinate's branch road, utilize said method to measure step by step, whether failure judgement occurs in surveyed branch road, so that finally find ground connection branch road, earth point is removed.
Earth fault detects again to earth point of zero mutually little bus after removing, complete to guarantee other all fault ground points dismountings.
The circuit that the utility model only consists of simple electronic component connects, and does not introduce other complex logic computing module, has realized fast finding and judgement to ground connection problem points, has feature efficiently directly perceived, is worthy to be popularized and uses.
Claims (2)
1. a Multiple Earth in Voltage Transformer Secondary Circuit detector, comprise detector body and external measuring pen, described detector body comprises alternating current ammeter, disconnector, detection resistance, two measured holes and lightning arrester safety box, described detection resistance and disconnector form parallel circuit, described parallel circuit and alternating current ammeter form series circuit, and described series circuit is in parallel with lightning arrester safety box.
2. a kind of Multiple Earth in Voltage Transformer Secondary Circuit detector as claimed in claim 1, is characterized in that: described external measuring pen is cable clamp structure, described lightning arrester is zinc paste breakdown fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320767305.6U CN203658510U (en) | 2013-11-29 | 2013-11-29 | Voltage transformer secondary circuit grounding detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320767305.6U CN203658510U (en) | 2013-11-29 | 2013-11-29 | Voltage transformer secondary circuit grounding detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203658510U true CN203658510U (en) | 2014-06-18 |
Family
ID=50924885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320767305.6U Expired - Fee Related CN203658510U (en) | 2013-11-29 | 2013-11-29 | Voltage transformer secondary circuit grounding detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203658510U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198877A (en) * | 2014-09-26 | 2014-12-10 | 国家电网公司 | Portable multipoint grounding detector |
| CN104777405A (en) * | 2015-04-30 | 2015-07-15 | 国家电网公司 | Passive voltage transformer secondary circuit N600 multipoint grounding finder and operation method thereof |
| CN113176438A (en) * | 2021-04-15 | 2021-07-27 | 国网湖北省电力有限公司宜昌供电公司 | Transformer substation secondary circuit detector and detection method |
-
2013
- 2013-11-29 CN CN201320767305.6U patent/CN203658510U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198877A (en) * | 2014-09-26 | 2014-12-10 | 国家电网公司 | Portable multipoint grounding detector |
| CN104777405A (en) * | 2015-04-30 | 2015-07-15 | 国家电网公司 | Passive voltage transformer secondary circuit N600 multipoint grounding finder and operation method thereof |
| CN104777405B (en) * | 2015-04-30 | 2018-07-31 | 国家电网公司 | Passive type Secondary Circuit of Potential Transformer N600 multipoint earthing locators and its operation method |
| CN113176438A (en) * | 2021-04-15 | 2021-07-27 | 国网湖北省电力有限公司宜昌供电公司 | Transformer substation secondary circuit detector and detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20151129 |