CN201196677Y - Vacuum switch insulation monitoring and high voltage electrified locking device - Google Patents
Vacuum switch insulation monitoring and high voltage electrified locking device Download PDFInfo
- Publication number
- CN201196677Y CN201196677Y CNU2008201128407U CN200820112840U CN201196677Y CN 201196677 Y CN201196677 Y CN 201196677Y CN U2008201128407 U CNU2008201128407 U CN U2008201128407U CN 200820112840 U CN200820112840 U CN 200820112840U CN 201196677 Y CN201196677 Y CN 201196677Y
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- Prior art keywords
- circuit
- vacuum switch
- monitoring
- vacuum
- voltage
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Abstract
The utility model relates to an insulation monitoring and high-voltage charged locking device for a vacuum switch, which comprises a voltage sampling circuit, an abnormal state locking circuit, an alarm and transmitting circuit and a charged display circuit, and is characterized in that the voltage sampling circuit adopts three sensors which are respectively connected with three phases of the vacuum switch; the other ends of the sensors are grounded; and secondary lead wires of the sensors are respectively connected with a monitoring and alarm circuit which consists of a signal adjusting circuit, the abnormal state locking circuit, the alarm and transmitting circuit and the high-voltage charged locking circuit, and are also connected with an electricity testing detection circuit through switching of a relay. The insulation monitoring and high-voltage charged locking device for the vacuum switch has a simple structure, high safety and strong reliability, can perform online monitoring and high-voltage charged locking on various types of vacuum switches through indirect measurement, adopts two electricity testing functions, takes a high-performance CPU as a controller, and can be stably operated in the situation with intense electromagnetic field interference because software adopts anti-interference design.
Description
Technical field
The utility model relates to a kind of vacuum switch insulating monitoring and electrification in high voltage blocking device.
Background technology
Vacuum switch is widespread use in electric system, and its core is a vacuum interrupter, has only when the vacuum arc-chutes keep condition of high vacuum degree to guarantee reliably working.National standard requires the internal gas pressure that dispatches from the factory of vacuum interrupter must not be higher than 1.33 * 10
-3Pa, this moment, 10KV switch fracture power-frequency withstand voltage was 42KV.But because the existence of factors such as housing seal or corrugated tube metal fatigue, vacuum interrupter can produce the chronic leakage phenomenon, and the vacuum switch internal gas pressure is raise, and vacuum tightness descends.When vacuum switch internal gas pressure is elevated to a certain degree, flashover phenomenon (glow discharge) appears, and vacuum switch will lose the arc extinguishing ability.In small current neutral grounding system, can not cause the accident when a phase switch loses the arc extinguishing ability, but, when the two-phase switch loses the arc extinguishing ability, split and put line operate into, the large area blackout that will cause switch blast, switch cubicle to burn as can not in time finding.
Summary of the invention
The utility model purpose just provides a kind of vacuum switch insulating monitoring and electrification in high voltage blocking device of safe, good reliability.
Vacuum switch insulating monitoring of the present utility model and electrification in high voltage blocking device comprise voltage sampling circuit, unusual condition exclusive circuit, warning transmitting circuit, charged display circuit, voltage sampling circuit adopts three sensors to be connected with three of vacuum switch respectively, the other end ground connection of sensor, the secondary lead wires of sensor inserts the monitoring, alarming loop of being made up of signal adjustment loop, unusual condition exclusive circuit, warning transmitting circuit, electrification in high voltage exclusive circuit by switch respectively, and the secondary lead wires of sensor is also switched the access electrical verification by relay and detected the loop.
The principle of work of vacuum switch insulating monitoring of the present utility model and electrification in high voltage blocking device: when operating vacuum switch is opened a way under system voltage, when the internal gas pressure of vacuum arc-chutes is higher than 6.6 * 10
-3Glow discharge takes place and causes the system voltage vibration in Pa in the vacuum interrupter, the vacuum switch load-side has the discharge drain voltage to produce.Can judge the variation tendency of vacuum level of vacuum arc-quenching chamber by the variation size of monitoring this voltage, play the function of vacuum switch insulation fault early warning.At the detected flashover voltage of vacuum switch load-side, after doing the root mean square circuit computing by capacitance partial pressure and signal conditioning circuit, the DC voltage of the detected flashover voltage of unique reflection vacuum switch, its value with reference voltage relatively back output digital signal deliver to CPU and handle: 1, insulate when good when the three-phase vacuum switch, A, B, C three-phase pilot lamp do not work, and no acousto-optic is reported to the police; 2, when the three-phase vacuum switch has a phase defective insulation, this phase pilot lamp is shinny, has sound and light alarm and relay tip conducting to report to the police and exports; 3, when the three-phase vacuum switch is closed, during system generation single-phase earthing, the two-phase pilot lamp is bright, and sound and light alarm is arranged; 4, when three-phase vacuum switch fracture was closed, this three-phase pilot lamp was shinny, is in charged show state, did not have sound and light alarm and relay tip to report to the police and exported; 5, reach two kinds of electroscope functions by the relay switching; 6, when as long as switch cubicle has one to be in electriferous state mutually, with latch switch cabinet net door or line-to-ground disconnecting link; 7, when system power supply 220VAC is in off-position, the system reserve power supply comes into operation, and system can interruption of work.
Simple in structure, safe, the good reliability of vacuum switch insulating monitoring of the present utility model and electrification in high voltage blocking device, can carry out on-line monitoring and electrification in high voltage locking to various types of vacuum switch insulativity by indirect measurement, it has adopted two kinds of electroscope functions, CPU makes controller through high-performance, software has adopted Anti-interference Design, can be at the occasion steady operation of strong-electromagnetic field interference.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model circuit theory synoptic diagram.
Embodiment
A kind of vacuum switch insulation monitoring and warning device comprises voltage sampling circuit, unusual condition exclusive circuit, warning transmitting circuit, charged display circuit, is characterized in: voltage sampling circuit adopts three sensor T
1, T
2, T
3Be connected sensor T with A, B, the C three of vacuum switch respectively
1, T
2, T
3Other end ground connection, sensor T
1, T
2, T
3Secondary lead wires pass through K switch respectively
1, K
2, K
3Access is adjusted the monitoring, alarming loop that loop, unusual condition exclusive circuit, warning transmitting circuit, electrification in high voltage exclusive circuit are formed, sensor T by signal
1, T
2, T
3Secondary lead wires also switch to insert electrical verification and detect the loop by relay J.
The content that is not described in detail in the above-mentioned instructions all belongs to this area professional and technical personnel's technique known.
Claims (1)
1. vacuum switch insulating monitoring and electrification in high voltage blocking device comprise voltage sampling circuit, unusual condition exclusive circuit, warning transmitting circuit, charged display circuit, it is characterized in that: voltage sampling circuit adopts three sensor (T
1), (T
2), (T
3) be connected sensor (T with A, B, the C three of vacuum switch respectively
1), (T
2), (T
3) other end ground connection, sensor (T
1), (T
2), (T
3) secondary lead wires respectively by switch (K
1), (K
2), (K
3) insert by signal and adjust the monitoring, alarming loop that loop, unusual condition exclusive circuit, warning transmitting circuit, electrification in high voltage exclusive circuit are formed, sensor (T
1), (T
2), (T
3) secondary lead wires also switch to insert electrical verification and detect the loop by relay (J).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201128407U CN201196677Y (en) | 2008-04-23 | 2008-04-23 | Vacuum switch insulation monitoring and high voltage electrified locking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201128407U CN201196677Y (en) | 2008-04-23 | 2008-04-23 | Vacuum switch insulation monitoring and high voltage electrified locking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201196677Y true CN201196677Y (en) | 2009-02-18 |
Family
ID=40416312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201128407U Expired - Fee Related CN201196677Y (en) | 2008-04-23 | 2008-04-23 | Vacuum switch insulation monitoring and high voltage electrified locking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201196677Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447225A (en) * | 2011-12-09 | 2012-05-09 | 天津市宁河供电有限公司 | Monitoring security system for abnormal switch-on of vacuum switch |
-
2008
- 2008-04-23 CN CNU2008201128407U patent/CN201196677Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447225A (en) * | 2011-12-09 | 2012-05-09 | 天津市宁河供电有限公司 | Monitoring security system for abnormal switch-on of vacuum switch |
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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: 20090218 Termination date: 20160423 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |