CN202260421U - Closing protection device for circuit breaker - Google Patents
Closing protection device for circuit breaker Download PDFInfo
- Publication number
- CN202260421U CN202260421U CN2011203794279U CN201120379427U CN202260421U CN 202260421 U CN202260421 U CN 202260421U CN 2011203794279 U CN2011203794279 U CN 2011203794279U CN 201120379427 U CN201120379427 U CN 201120379427U CN 202260421 U CN202260421 U CN 202260421U
- Authority
- CN
- China
- Prior art keywords
- closing
- control unit
- circuit breaker
- central control
- relay
- 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
Images
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model discloses a closing protection device for a circuit breaker. A central control unit is connected with a closing relay and an alarm relay and also connected with the circuit breaker. By adopting the above structure and method, the central control unit achieves accurate sampling and controlling of both the circuit breaker and the relays, so that mistrip and other failures at the instant of closing are effectively avoided, rapid breaking of short troubles can be ensured, and the reliability in power supply is greatly improved. Besides, the protection device has the advantages of small size, high accuracy in timing action, large breaking capacity and simplicity in wiring and mounting.
Description
Technical field:
The claimed technical scheme of the utility model relates to a kind of breaker closing protective device.
Background technology:
In current electric power system; Circuit breaker is can close to close, carry and cut-off the electric current under the normal loop condition; And can close and close, in official hour, carry and cut-off the switching device that unusual loop condition comprises the electric current under the short circuit condition; The fault of divide-shut brake coil, closing contactor coil burnout often takes place in circuit breaker after carrying out closing operation or emergency stop valve trip.This has not only increased maintenance workload, has prolonged interruption duration, and serious also can cause electrical fire.Therefore, must increase protective device in case the generation of type fault here, be main at the switching-on controller of present switch cubicle with relay control mode, and cost is high, and accuracy is low, and fragile.
The utility model content:
The utility model technical issues that need to address are, provide a kind of breaker closing protective device to reach accurately the purpose of accurately circuit breaker being protected to the deficiency of prior art.
For the technical scheme that solves the problems of the technologies described above the utility model is; A kind of breaker closing protective device; The central control unit that comprises protective device, described central control unit is connected with alarm relay with closing relay, and described central control unit is connected with circuit breaker.
The model of the control chip of described central control unit is STC12C5204.
A kind of breaker closing protective device; Owing to adopt said structure and method; Central control unit is sampled accurately to circuit breaker and relay and is controlled, and the phenomena of the failure such as mistrip of the moment that prevents effectively to close a floodgate can be guaranteed the quick disjunction of short trouble again; Improved the reliability of power supply greatly, and this protective device advantages of small volume, regularly operation precision is high, breaking capacity is big, wiring is installed simple.
Description of drawings:
Below in conjunction with accompanying drawing and embodiment the utility model is explained further details:
Fig. 1 is the utility model theory diagram;
Fig. 2 is the utility model flow chart;
In Fig. 1,1, central control unit, 2, circuit breaker, 3, closing relay, 4, alarm relay.
Embodiment:
Shown in Fig. 1-2, a kind of breaker closing protective device comprises the central control unit 1 of protective device, and described central control unit 1 is connected with alarm relay 4 with closing relay 3, and described central control unit 1 is connected with circuit breaker 2.
The model of the control chip of described central control unit 1 is STC12C5204.
Central control unit 1 is controlled alarm relay 4 and closing relay 3 through input signal and anti-jump signal that collection circuit breaker 2 provides accurately, and circuit breaker 2 is protected.
A kind of guard method of breaker closing protective device is characterized in that: described guard method comprises the following steps:
A) sampling step, the anti-jump signal and the input signal of sampling circuit breaker 2 outputs of central control unit 1;
B) signal processing step, anti-jump signal and input signal that 1 pair of central control unit collects carry out filtering and calibration;
C) determining step, the signal that central control unit 1 will be handled and the rating number of setting compare;
D) controlled step, central control unit 1 is controlled closing relay 3 and alarm relay 4 through the judged result of determining step.
Described controlled step, the magnitude of voltage of input signal surpasses 75% of load voltage value, and central control unit control closing relay 3 carries out the closing contact closed procedure, breaks off behind the closed 100ms.
Described controlled step, the magnitude of voltage of input signal is lower than 75% of load voltage value, the central control unit 1 control alarm relay electric shock closed procedure that closes a floodgate, circulate between closed and disconnected in the alarm relay contact, and the intercycle is 500ms.
Described controlled step, the magnitude of voltage of input signal surpasses 75% of load voltage value, and central control unit receives anti-jump signal, and central control unit 1 control closing relay breaks off.
Described controlled step, the closed and disconnected of closing relay 3 is interval greater than 20S.
Central control unit 1 receives the input voltage of anti-jump signal and acquired signal, in control chip, carries out the AD conversion then, disturbs for preventing the signal in the electrical network; Control chip will carry out filtering and calibration, to guarantee the correctness of sampled voltage, judges the scope of magnitude of voltage subsequently; If magnitude of voltage is at 75% closing relay when above of the rated voltage electric shock closed procedure that closes a floodgate; Break off behind the closed 100ms, the magnitude of voltage of input signal is lower than 75% of load voltage value, and central control unit control alarm relay carries out the closing contact closed procedure; Circulate between closed and disconnected in the alarm relay contact, the intercycle is 500ms., closing time carries out the delayed alarm operation if surpassing set point; After closing a floodgate successfully for the first time, carrying out the remote signalling amount must judge, closes a floodgate and alarm operation if anti-jump signal is arranged then can not repeat, if there is not anti-jump signal; Then allow to repeat to close a floodgate and alarm operation; Be the danger of avoiding repeating to close a floodgate and bringing, take into account the function of circuit breaker reclosing again, be defined in and do not allow to repeat combined floodgate in the 20s.
Like Fig. 2 is the utility model program flow diagram,
In step 110, initialization;
In step 111, signals collecting;
In step 112, the filtering of signal and calibration;
In step 113, judge whether the magnitude of voltage of input signal surpasses 75% of load voltage value, judged result gets into step 114 for being, and judged result gets into step 115 for not;
In step 114, closing relay output;
In step 115, alarm relay output;
In step 116, judged whether anti-jump signal input, judged result gets into step 117 for being, and judged result gets into step 118 for not;
In step 117, do not allow to repeat to close a floodgate;
In step 118, allow to repeat to close a floodgate;
After getting into step 118, return step 113 and judge voltage range;
In step 119, EP (end of program).
Claims (2)
1. breaker closing protective device; The central control unit (1) that comprises protective device; It is characterized in that: described central control unit (1) is connected with alarm relay (4) with closing relay (3), and described central control unit (1) is connected with circuit breaker (2).
2. a kind of breaker closing protective device according to claim 1 is characterized in that: the model of the control chip of described central control unit (1) is STC12C5204.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2011203794279U CN202260421U (en) | 2011-09-29 | 2011-09-29 | Closing protection device for circuit breaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2011203794279U CN202260421U (en) | 2011-09-29 | 2011-09-29 | Closing protection device for circuit breaker |
Publications (1)
Publication Number | Publication Date |
---|---|
CN202260421U true CN202260421U (en) | 2012-05-30 |
Family
ID=46121606
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2011203794279U Expired - Fee Related CN202260421U (en) | 2011-09-29 | 2011-09-29 | Closing protection device for circuit breaker |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN202260421U (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102394492A (en) * | 2011-09-29 | 2012-03-28 | 安徽鑫龙电器股份有限公司 | Circuit breaker closing protection device and closing protection method |
CN107681633A (en) * | 2017-11-21 | 2018-02-09 | 国网宁夏电力有限公司宁东供电公司 | voltage transformer secondary voltage intelligent protection device |
-
2011
- 2011-09-29 CN CN2011203794279U patent/CN202260421U/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102394492A (en) * | 2011-09-29 | 2012-03-28 | 安徽鑫龙电器股份有限公司 | Circuit breaker closing protection device and closing protection method |
CN107681633A (en) * | 2017-11-21 | 2018-02-09 | 国网宁夏电力有限公司宁东供电公司 | voltage transformer secondary voltage intelligent protection device |
CN107681633B (en) * | 2017-11-21 | 2023-07-14 | 国网宁夏电力有限公司宁东供电公司 | Intelligent secondary voltage protection device for voltage transformer |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN203825164U (en) | Detection platform for DC circuit breaker | |
CN105449865A (en) | Intelligent (feeder terminal unit) FTU used for fault positioning and isolating for distribution network | |
CN203553628U (en) | Intelligent power box for base station | |
CN111880084A (en) | Residual current protection uninterruptible power test method and device and residual current protection device | |
CN111880083A (en) | Uninterrupted residual current test method and device and residual current protection device | |
CN103941180A (en) | High-voltage line breaker condition monitoring system | |
CN201797308U (en) | Microcomputer arc light protection device | |
CN201549868U (en) | Low-voltage switch intelligent controller | |
CN202260421U (en) | Closing protection device for circuit breaker | |
CN102520350A (en) | Circuit for determining lockout states of lockout relays | |
CN101860075A (en) | Three-power supply automatic switching device | |
CN102790360A (en) | Low-voltage complete switch equipment and control method thereof | |
CN203225510U (en) | Residual-current circuit breaker with self-checking function | |
CN105529737B (en) | Grid disconnection device and method | |
CN201877814U (en) | Controller for circuit breaker | |
CN101841186B (en) | Automatic backup silicon chain switching device for direct-current system | |
CN202794462U (en) | Intelligent fault diagnosis device for opening and closing coils | |
CN102394492A (en) | Circuit breaker closing protection device and closing protection method | |
CN202076781U (en) | Protector with temperature monitoring | |
CN111211545B (en) | Method and system for protecting single-phase broken line at high-voltage side of transformer with balance winding | |
CN204407871U (en) | Circuit breaker is the built-in protection module control circuit of changer controller more | |
CN203607351U (en) | A low-voltage circuit breaker automatic closing apparatus | |
CN202978079U (en) | Intelligent-type vacuum circuit breaker | |
CN208539573U (en) | A kind of phase-change switch that can prevent detection automatically | |
CN202014136U (en) | Structure for monitoring opening/closing control loop of VS1 circuit breaker |
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: 20120530 Termination date: 20140929 |
|
EXPY | Termination of patent right or utility model |