CN203054065U - PT cabinet sampling switch device - Google Patents
PT cabinet sampling switch device Download PDFInfo
- Publication number
- CN203054065U CN203054065U CN 201320051639 CN201320051639U CN203054065U CN 203054065 U CN203054065 U CN 203054065U CN 201320051639 CN201320051639 CN 201320051639 CN 201320051639 U CN201320051639 U CN 201320051639U CN 203054065 U CN203054065 U CN 203054065U
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- Prior art keywords
- cabinet
- relay
- switch device
- sampling switch
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Abstract
The utility model discloses a PT cabinet sampling switch device comprising a first PT cabinet, a second PT cabinet and a relay, wherein the relay comprises three groups of contact points, each group of contact points comprise a normally open contact point and a normally closed contact point, each group of contact points are respectively connected in series between power source wire inlet ends of the first PT cabinet and the second PT cabinet, and a wire coil of the relay is connected in series on a power source firing wire inlet end of the first PT cabinet. The PT cabinet sampling switch device is simple in structure; by adding the intermediate relay between the power source wire inlet ends of the main use PT cabinet and the standby PT cabinet, the standby PT cabinet wire inlet ends are directly switched for voltage sampling operation at measurement points when the main use PT cabinet is powered off. Therefore the PT cabinet sampling switch device is advantaged by saved manpower, reduced operation steps, and effective and reliable line power supply.
Description
Technical field
The utility model relates to the high voltage power transmission and transforming detection range, relates in particular to a kind of PT cabinet sampling conversion device.
Background technology
The PT cabinet is the voltage transformer (VT) cabinet, generally is directly to be attached on the bus, to detect busbar voltage and to realize defencive function.Its inner main voltage transformer pt, isolation knife, fuse and lightning arresters etc. installed.The power supply of high-voltage board screen top WV is provided by the PT cabinet, and existing P T cabinet shares the WV of going up the screen top, for other outlet high-voltage board provides measurements, metering, protects with power supply etc.
In 10KV primary system loop, high voltage supply system comprises respectively corresponding two the PT cabinets of two-way inlet wire, and wherein one road inlet wire is the standby operation mode; Namely when powering with different inlet wires, employed PT cabinet difference, the selected point of sampled voltage are also different.But having now when sampled voltage is chosen all is manual operation, when for example using PT cabinet power supply, then opens a PT cabinet, closes the 2nd PT cabinet, uses the power end of a PT cabinet to sample simultaneously.Otherwise when using the power supply of the 2nd PT cabinet, open the 2nd PT cabinet and close a PT cabinet, the power end that manually connects the 2nd PT cabinet is sampled.So not only need personnel operation conversion sampled point, and do not allow to make mistakes, greatly reduce efficient like this, can not satisfy the requirement of normal use.
The utility model content
The purpose of this utility model provides a kind ofly can work as the main PT cabinet sampling conversion device that can automatically switch to the stand-by power supply circuit when not having electricity with supply line.
The utility model adopts following technical proposals:
A kind of PT cabinet sampling conversion device, comprise a PT cabinet and the 2nd PT cabinet, also comprise relay, described relay comprises three groups of contacts, every group of contact comprises a normally opened contact and a normally closed contact, described every group of contact is connected on respectively between the power inleting terminal of a PT cabinet and the 2nd PT cabinet, and the coil of described relay is connected on the power firestreak end of incoming cables of a PT cabinet.
Described relay is auxiliary reclay.
The utility model is simple in structure, by increasing an auxiliary reclay main between with the power inleting terminal of PT cabinet and standby PT cabinet, thereby makes mainly during with the outage of PT cabinet, and measurement point can directly be converted to and use standby PT cabinet end of incoming cables to carry out the sampling of voltage.So not only saved manpower, reduced operation steps, and made line powering more effectively, reliably.
Description of drawings
Fig. 1 is electrical block diagram of the present utility model.
Embodiment
As shown in Figure 1, the utility model comprises a PT cabinet 1 and the 2nd PT cabinet 2, also comprise relay, described relay is intermediate relay ZJ, described intermediate relay ZJ comprises three groups of contacts, every group of contact comprises a normally opened contact 3 and a normally closed contact 4, described every group of contact is connected on respectively between power inleting terminal L1, N1, the E1 of power inleting terminal L, N, E and the 2nd PT cabinet 2 of a PT cabinet 1, and the coil of described intermediate relay ZJ is connected on the power firestreak L end of incoming cables of a PT cabinet 1.
A PT cabinet 1 described in the utility model is powering shelf commonly used, the 2nd PT cabinet 2 is the stand-by power supply cabinet, normally opened contact 3 during installation in every group of the intermediate relay ZJ connects the power inleting terminal of a PT cabinet, and the normally closed contact 4 in every group connects the power inleting terminal of the 2nd PT cabinet, otherwise can reversal connection.
The utility model carries out the monitoring of electric power by the power firestreak inlet wire L end that uses intermediate relay ZJ to be connected on a PT cabinet 1; like this when a PT cabinet has electricity; the coil of intermediate relay ZJ just has current lead-through; at this moment; normally opened contact 3 in each group of intermediate relay ZJ inhaled and; normally closed contact 4 is opened, and this moment, voltage taked a little that the power inleting terminal of 7 pairs of PT cabinets 1 carries out transformation, sampling, analysis and protection.When a PT cabinet 1 has a power failure; because electric power system arranges and enables the supply of the 2nd PT cabinet incoming power this moment automatically; this moment, the coil of intermediate relay ZJ was not charged; normally opened contact 3 in every group of contact of auxiliary reclay is opened; normally closed contact 4 closures, voltage are taked a little, and the power inleting terminal of 7 pairs of the 2nd PT cabinets 2 carries out transformation, sampling, analysis and protection.On the basis of original automatic voltage of transformation, just realize the automatic conversion of sampling like this, not only guaranteed not conflicting of two-way voltage signal, and guaranteed the effective power supply state of line security.
Claims (2)
1. PT cabinet sampling conversion device, comprise a PT cabinet and the 2nd PT cabinet, it is characterized in that: also comprise relay, described relay comprises three groups of contacts, every group of contact comprises a normally opened contact and a normally closed contact, described every group of contact is connected on respectively between the power inleting terminal of a PT cabinet and the 2nd PT cabinet, and the coil of described relay is connected on the power firestreak end of incoming cables of a PT cabinet.
2. PT cabinet sampling conversion device according to claim 1, it is characterized in that: described relay is auxiliary reclay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320051639 CN203054065U (en) | 2013-01-30 | 2013-01-30 | PT cabinet sampling switch device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320051639 CN203054065U (en) | 2013-01-30 | 2013-01-30 | PT cabinet sampling switch device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203054065U true CN203054065U (en) | 2013-07-10 |
Family
ID=48737005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320051639 Expired - Lifetime CN203054065U (en) | 2013-01-30 | 2013-01-30 | PT cabinet sampling switch device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203054065U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254711A (en) * | 2018-03-08 | 2018-07-06 | 云南电网有限责任公司电力科学研究院 | A kind of inter space device and method that can inhibit electromagnetic potential transformer tail end voltage |
-
2013
- 2013-01-30 CN CN 201320051639 patent/CN203054065U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254711A (en) * | 2018-03-08 | 2018-07-06 | 云南电网有限责任公司电力科学研究院 | A kind of inter space device and method that can inhibit electromagnetic potential transformer tail end voltage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130710 |
|
| CX01 | Expiry of patent term |