CN203813426U - Tripping protector for circuit breaker - Google Patents
Tripping protector for circuit breaker Download PDFInfo
- Publication number
- CN203813426U CN203813426U CN201320604512.XU CN201320604512U CN203813426U CN 203813426 U CN203813426 U CN 203813426U CN 201320604512 U CN201320604512 U CN 201320604512U CN 203813426 U CN203813426 U CN 203813426U
- Authority
- CN
- China
- Prior art keywords
- relay
- time relay
- protector
- time
- contact
- Prior art date
- 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
- 230000001012 protector Effects 0.000 title claims abstract description 19
- 239000011819 refractory material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- Relay Circuits (AREA)
Abstract
The utility model discloses a tripping protector for a circuit breaker, and the protector comprises a housing which is provided with four wiring ends. The interior of the housing is provided with an intermediate relay and a time relay. The intermediate relay comprises a normally open contact. The time relay comprises a normally open contact and a normally-closed contact. According to the utility model, a loop where an opening coil is located is provided with the time relay and the intermediate relay, thereby forming a voltage-exceeding time relay and maintaining circuit, and achieving the time relay of the closing of the normally-closed contact of the time relay during reaching the setting time of KT operation of the time relay when the opening coil is electrified for a long time, for example, when an auxiliary contact cannot be opened or the circuit breaker fails to switch off. Therefore, the coil of the intermediate relay of the protector is electrified to operate, and a switching-off loop is locked and disconnected, thereby achieving the self-maintaining effect, preventing the opening coil from being burnt, and greatly improving the stability of the safety operation of a power grid.
Description
Technical field
The utility model relates to a kind of protector, relates in particular to a kind of breaker open operation protector.
Background technology
Switching winding is as the instantaneous operation element of one; be in operation often can be because of aspects such as brake separating mechanism, auxiliary contact or control loops former thereby long charged; burn switching winding; especially the circuit breaker of frequent operation more easily occurs, and brings very adverse influence to the safe and stable operation of electrical network.
As shown in Figure 1; in existing line; switching winding TQ one end connects power supply-KM end; one end of other end connecting breaker auxiliary contact DL; described power supply end-KM and+KM end is connected with respectively protection electric fuse 2FU and 1FU; in figure, resistance R 1, R2 are proportion resistor; at circuit breaker during in closing position; 13,16 contacts of joystick KK are in on-state; circuit breaker auxiliary contact DL make position; red light RD is bright, now in switching winding TQ, only has a little electric current to flow through, and TQ is failure to actuate.When circuit breaker outer protection loop action separating brake or while carrying out sub-switching operation; supply voltage is by 6,7 contacts of protection loop or KK; break not open or the breaker open operation fault such as unsuccessfully through anti-trip relay TBJ, circuit breaker auxiliary contact DL, as auxiliary contact DL; switching winding TQ can obtain continuing large electric current; thereby burnt, and then affected the safety of circuit breaker work and electrical network.
Utility model content
The purpose of this utility model is to provide a kind of breaker open operation protector, and the switching winding of protective circuit breaker, makes power network safety operation effectively.
The utility model adopts following technical proposals:
A kind of breaker open operation protector, comprise housing, on housing, be provided with four terminals, in housing, be provided with auxiliary relay and the time relay, described auxiliary relay comprises a normally opened contact, the described time relay comprises a normally opened contact and a normally-closed contact, the coil of described auxiliary relay is connected between the first terminals and the second terminals for being connected power end with the normally opened contact of the time relay, the normally-closed contact of described auxiliary relay is connected between the 3rd terminals and the 4th terminals for connecting breaker sub-gate circuit, the normally opened contact of auxiliary relay is connected in parallel on the two ends of time relay normally opened contact, described time relay coil is connected between the second binding post and the 3rd terminals.
Described housing is that refractory material is made.
The utility model is simple in structure; by at loop, switching winding place setup times relay and auxiliary relay; thereby composition has superpressure time delay, a holding circuit; it is long charged that thereby switching winding is worked as in realization; as auxiliary contact breaks not open or the breaker open operation fault such as unsuccessfully; and while reaching time relay KT action setting time; time delay relay normally opened contact closure; thereby the coil of the auxiliary relay of protector obtains electric action; locking also disconnects sub-gate circuit; and energy self-sustaining, thereby avoid switching winding to be burnt.Greatly improve the stability of electric power netting safe running.
Brief description of the drawings
Fig. 1 is brake division loop of circuit breaker electrical schematic diagram;
Fig. 2 is that the utility model is installed and used electrical schematic diagram.
Embodiment
As shown in Figure 2, a kind of breaker open operation protector, comprise housing 5, on housing 5, be provided with four terminals, in housing 5, be provided with auxiliary relay KA and time relay KT, described time relay KT comprises a normally opened contact KT1, described auxiliary relay KA comprises a normally opened contact KA1 and a normally-closed contact KA2, the coil of described auxiliary relay KA is connected between the first terminals 1 and the second terminals 2 for being connected power end with the normally opened contact KT1 of time relay KT, the normally-closed contact KA2 of described auxiliary relay KA is connected between the 3rd terminals 3 and the 4th terminals 4 for connecting breaker sub-gate circuit, the normally opened contact KA1 of auxiliary relay KA is connected in parallel on the two ends of time relay normally opened contact KT1, the coil of described time relay KT is connected between the second binding post 2 and the 3rd terminals 4.
Described housing 5 is made for refractory material, can prevent that the utility model is at fire etc.Described power supply end-KM and+KM end is connected with respectively protection electric fuse 2FU and 1FU, in figure, resistance R 1, R2 are proportion resistor, for regulation voltage ratio, are existing parts, operation principle is not repeated.
When installation, as shown in Figure 2, the first terminals 1 connect power supply anode+KM, the second line end 2 connects power supply negative terminal-KM, the 3rd binding post 3 and the 4th binding post 4 are connected between switching winding TQ and circuit breaker auxiliary contact DL, when work, at circuit breaker during in closing position, 13 of joystick KK, 16 contacts are in on-state, DL is in the close position for circuit breaker auxiliary contact, red light RD is luminous, now in switching winding TQ, there is a little electric current to flow through, deficiency is so that TQ action, because now TQ both end voltage is lower, the time relay KT of protector can not move, separating brake protector is not worked, brake division loop of circuit breaker is had no effect.When circuit breaker outer protection loop action separating brake or while carrying out sub-switching operation, supply voltage is by 6,7 contacts of protection loop or KK, auxiliary relay normally closed contact KA2 through anti-trip relay TBJ, circuit breaker auxiliary contact DL, protector is concatenated into switching winding TQ two ends, and makes it to move separating brake; Simultaneously; separating brake protector is started working; the supply voltage that is added to TQ two ends makes the time relay KT of protector start time delay; within the scope of the setting time of KT; if the normal separating brake of circuit breaker (opening time is about 0.06 ~ 0.12s), auxiliary contact DL reliably disconnects, the coil losing electricity of time relay KT; stop timing, switching winding protective circuit is failure to actuate.Otherwise; once switching winding TQ is long charged; as auxiliary contact DL breaks not open or the breaker open operation fault such as unsuccessfully; in the time reaching time relay KT action setting time; time delay relay normally opened contact KT1 closure, thus the coil of the auxiliary relay KA of protector obtains electric action, and normally opened contact KA1 closure and the normally-closed contact KA2 of locking auxiliary relay disconnect sub-gate circuit; and self-sustaining, thereby avoid switching winding to be burnt.Meanwhile, KT dead electricity, contact KT disconnects.
The utility model is simple in structure, practical, cheap, easy-to-connect, safe and reliable, be convenient to promote.
Claims (2)
1. a breaker open operation protector, comprise housing, on housing, be provided with four terminals, it is characterized in that: in housing, be provided with auxiliary relay and the time relay, described auxiliary relay comprises a normally opened contact, the described time relay comprises a normally opened contact and a normally-closed contact, the coil of described auxiliary relay is connected between the first terminals and the second terminals for being connected power end with the normally opened contact of the time relay, the normally-closed contact of described auxiliary relay is connected between the 3rd terminals and the 4th terminals for connecting breaker sub-gate circuit, the normally opened contact of auxiliary relay is connected in parallel on the two ends of time relay normally opened contact, described time relay coil is connected between the second binding post and the 3rd terminals.
2. breaker open operation protector according to claim 1, is characterized in that: described housing is that refractory material is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320604512.XU CN203813426U (en) | 2013-09-29 | 2013-09-29 | Tripping protector for circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320604512.XU CN203813426U (en) | 2013-09-29 | 2013-09-29 | Tripping protector for circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203813426U true CN203813426U (en) | 2014-09-03 |
Family
ID=51452134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320604512.XU Expired - Fee Related CN203813426U (en) | 2013-09-29 | 2013-09-29 | Tripping protector for circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203813426U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545795A (en) * | 2013-09-29 | 2014-01-29 | 国家电网公司 | Breaker tripping protector |
-
2013
- 2013-09-29 CN CN201320604512.XU patent/CN203813426U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545795A (en) * | 2013-09-29 | 2014-01-29 | 国家电网公司 | Breaker tripping protector |
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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: 20140903 Termination date: 20190929 |