CN203632347U - Double-bus voltage parallel switching device based on uninterrupted power supply - Google Patents
Double-bus voltage parallel switching device based on uninterrupted power supply Download PDFInfo
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- CN203632347U CN203632347U CN201320701773.3U CN201320701773U CN203632347U CN 203632347 U CN203632347 U CN 203632347U CN 201320701773 U CN201320701773 U CN 201320701773U CN 203632347 U CN203632347 U CN 203632347U
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Abstract
A double-bus voltage parallel switching device based on uninterrupted power supply comprises two groups of buses under a double-bus wiring mode. The two groups of buses are connected through a bus tie circuit breaker and knife switches on the two sides thereof. Each group of bus is provided with a voltage transformer which is connected to a corresponding common small bus to form a bus secondary voltage loop. An on/off knife switch is connected between each group of bus and the voltage transformer thereof. The on/off knife switches respectively correspond to switching relays, provided with normally open and normally closed auxiliary contacts, of two groups of voltage transformer knife switches. The double-bus voltage parallel switching device based on uninterrupted power supply has the characteristics of being reasonable in structure, convenient to use, safe and reliable, and the like.
Description
Technical field
The utility model relates to a kind of double-bus voltage switching device shifter arranged side by side based under power-off condition not, belong to the safety device of electric power system median generatrix secondary voltage circuit.
Background technology
Bus secondary voltage circuit plays a very important role in electric power system, all be unable to do without bus secondary voltage from relaying protection to measuring, measuring; Especially for the stable distance protection of protection range, will cause protection blocking once lose secondary voltage, cause the serious consequence of protection misoperation or locking.The double bus scheme mode that bus wiring at present extensively adopts; therefore; the in the situation that of double bus scheme mode; the secondary voltage circuit that how to guarantee two buses uses to the protection under all these electric pressures, observing and controlling and metering device, just need one reliably, the voltage switching device shifter arranged side by side of stable performance.
Summary of the invention
The purpose of this utility model is to overcome the deficiency that prior art exists, and provides a kind of structure composition rationally, easy to use, the safe and reliable double-bus voltage switching device shifter arranged side by side based under power-off condition not.
The purpose of this utility model completes by following technical solution, and it comprises two groups of buses under double bus scheme mode, and the plug-in strip by a bus and both sides thereof between these two groups of buses connects; On described two groups of buses, respectively there is one group of voltage transformer to be connected to corresponding public little bus, and form bus secondary voltage circuit, and be connected with break-make plug-in strip between every group of bus and the voltage transformer being connected separately.
Described break-make plug-in strip respectively to should have two groups of voltage transformer plug-in strips, with the transfer relay of Chang Kai and normally closed auxiliary contact.
The utlity model has structure and form the features such as reasonable, easy to use, safe and reliable.
Accompanying drawing explanation
Fig. 1 is double-bus main electrical scheme structural representation described in the utility model.
Fig. 2 is bus secondary voltage transfer relay circuit theory figure described in the utility model.
Fig. 3 is secondary wiring of current mutual inductor figure described in the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail: shown in Fig. 1, the purpose of this utility model completes by following technical solution, it comprises two groups of bus I, an II under double bus scheme mode, and plug-in strip 1FG, 2FG by a bus DL and both sides thereof between these two groups of bus I, II connect; In described two groups of bus I, II, respectively there are one group of voltage transformer 1PT, 2PT to be connected to corresponding public little bus, and form bus secondary voltage circuit, and be connected with break-make plug-in strip G1, G2 between every group of bus and the voltage transformer being connected separately.
Shown in Fig. 2, described break-make plug-in strip G1, G2 respectively to should have two groups of voltage transformer plug-in strips, with transfer relay 1YQJ, the 2YQJ of Chang Kai and normally closed auxiliary contact, described transfer relay 1YQJ, 2YQJ are magnetic latching relay, wherein one group of transfer relay 1YQJ is made up of multiple magnetic latching relay 1YQJ1,1YQJ2,1YQJ3, and another group transfer relay 2YQJ is also made up of multiple magnetic latching relay 2YQJ1,2YQJ2,2YQJ3.
As break-make plug-in strip G1(G2) plug-in strip closes, its corresponding normally closed auxiliary contact disconnects, and often opens auxiliary contact closure, drives transfer relay 1YQJ(2YQJ) actuation coil excitation, its corresponding contact is all closed.
Shown in Fig. 3, voltage transformer secondary voltage described in the utility model passes through 1YQJ(2YQJ) contact delivers to corresponding public little bus.As G1(G2) plug-in strip disconnect time, its correspondence is often opened auxiliary contact and is disconnected, and normally closed auxiliary contact closure drives 1YQJ(2YQJ) transfer relay involution coil motion, its corresponding contact all disconnects, and now voltage transformer secondary voltage cannot be delivered to public little bus.
Claims (2)
1. the double-bus voltage switching device shifter arranged side by side based under power-off condition not, it comprises two groups of buses under double bus scheme mode, it is characterized in that: the plug-in strip (1FG, 2FG) by a bus (DL) and both sides thereof between these two groups of buses (I, II) connects; On described two groups of buses (I, II), respectively there is one group of voltage transformer (1PT, 2PT) to be connected to corresponding public little bus, and form bus secondary voltage circuit, and be connected with break-make plug-in strip (G1, G2) between every group of bus and the voltage transformer being connected separately.
2. the double-bus voltage switching device shifter arranged side by side based under power-off condition not according to claim 1, it is characterized in that described break-make plug-in strip (G1, G2) respectively to should have two groups of voltage transformer plug-in strips, with the transfer relay (1YQJ, 2YQJ) of Chang Kai and normally closed auxiliary contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320701773.3U CN203632347U (en) | 2013-11-08 | 2013-11-08 | Double-bus voltage parallel switching device based on uninterrupted power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320701773.3U CN203632347U (en) | 2013-11-08 | 2013-11-08 | Double-bus voltage parallel switching device based on uninterrupted power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203632347U true CN203632347U (en) | 2014-06-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320701773.3U Expired - Fee Related CN203632347U (en) | 2013-11-08 | 2013-11-08 | Double-bus voltage parallel switching device based on uninterrupted power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203632347U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993572A (en) * | 2015-05-12 | 2015-10-21 | 国家电网公司 | Novel voltage paralleling switching handle and method for using same |
| CN106532904A (en) * | 2017-01-04 | 2017-03-22 | 山东钢铁股份有限公司 | Double bus-powered PT secondary voltage switching circuit and protection circuit thereof |
-
2013
- 2013-11-08 CN CN201320701773.3U patent/CN203632347U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993572A (en) * | 2015-05-12 | 2015-10-21 | 国家电网公司 | Novel voltage paralleling switching handle and method for using same |
| CN106532904A (en) * | 2017-01-04 | 2017-03-22 | 山东钢铁股份有限公司 | Double bus-powered PT secondary voltage switching circuit and protection circuit thereof |
| CN106532904B (en) * | 2017-01-04 | 2023-07-07 | 山东钢铁股份有限公司 | PT secondary voltage switching circuit with double bus power supply and protection circuit thereof |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140604 Termination date: 20201108 |