CN203312787U - Overvoltage protection device with circuit detection device - Google Patents
Overvoltage protection device with circuit detection device Download PDFInfo
- Publication number
- CN203312787U CN203312787U CN2012204635166U CN201220463516U CN203312787U CN 203312787 U CN203312787 U CN 203312787U CN 2012204635166 U CN2012204635166 U CN 2012204635166U CN 201220463516 U CN201220463516 U CN 201220463516U CN 203312787 U CN203312787 U CN 203312787U
- Authority
- CN
- China
- Prior art keywords
- circuit
- phase
- voltage
- arc
- detection module
- 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
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses an overvoltage protection device with a circuit detection device. The overvoltage protection device comprises electric equipment which is electrically connected with the bus of each phase of a three-phase and three-wire system through a vacuum circuit breaker, the circuit detection device, and an over voltage absorber and an arc-suppression harmonic elimination protection assembly which are arranged between the bus of each phase of the three-phase and three-wire system beside the electrical equipment and the ground, wherein the circuit detection device is connected with the electric equipment; the two ends of the vacuum circuit breaker are parallel connected with a circuit breaker restriking suppressor; the over voltage absorber is composed of zinc oxide varistors; and a voltage transformer protector is series connected between the neutral point of the primary side of a voltage transformer in the arc-suppression harmonic elimination protection assembly and the ground.
Description
Technical field
The utility model relates to a kind of overvoltage protection.
Background technology
At present, China considers for economical and operation, 3～35kV system in three-phase power grid is neutral point non-direct grounding system, and the various overvoltage in this system have very large impact to the insulation of power consumption equipment, has brought very large hidden danger for the safe operation of using electricity system.In system, superpotential formation mainly contains Lightning Over-voltage, switching overvoltage and arc grounding overvoltage; For solving these superpotential harm; people are everlasting, between each phase bus of the other three-phase three wire system of power consumption equipment and ground, surge absorber and arc-extinguishing harmonic-eliminating protection assembly are set; surge absorber wherein is connected in series and forms mutually with carborundum or zinc oxide by discharging gap, and arc-extinguishing harmonic-eliminating protection assembly is electrically connected to form by high-tension fuse, high-voltage and current-limitation fuse, high-pressure AC vacuum contactor, voltage transformer and controller.This overvoltage facility for prevention and control that surge absorber and arc-extinguishing harmonic-eliminating protection assembly is simply piled up exists weak point, at first, though surge absorber can be eliminated the overvoltage produced because of the thunderbolt in atmosphere or artificial operation, but can't eliminate vacuum circuit-breaker makes its contact ask the defect of restriking because cut-offfing the switching overvoltage produced in (closed or shutoff) process, its cause is, after the vacuum circuit breaker cut-offs, its two ends have formed different independently mini systems because cut-offfing impedance in loop or the difference of induction reactance or capacitive reactance, the superpotential frequency that this independently mini system produces, phase place all can not be consistent, so caused surge absorber to be difficult to eliminate up hill and dale the overvoltage at vacuum circuit-breaker two ends, thereby also just can't suppress it restrikes, secondly, discharging gap in surge absorber could play restriction to overvoltage while not only making various overvoltage need reach the place value of surge absorber, and system now has been subjected to superpotential impact, also too short because of the discharge time of Lightning Over-voltage, be Microsecond grade, and there is discharge time in surge absorber, make it to Lightning Over-voltage, not have effective protective effect, again, the protective feature of arc-extinguishing harmonic-eliminating protection assembly is weak, for example, after system is gone through generation arc grounding, the action of arc-extinguishing harmonic-eliminating protection assembly, removal of faults on system, the normal operation of three-phase power grid recovery, in the process that arc-extinguishing harmonic-eliminating protection assembly resets, system becomes another kind of state from a kind of stable state-transition, in system, normal two relatively ask mutually because asking that mutually electric capacity forms and shove, thereby the primary winding to the voltage transformer in system produces impact, and then causes the damage of voltage transformer and the accident of High-voltage Fuse Blow, finally, surge absorber and arc-extinguishing harmonic-eliminating protection assembly ask because adhering to different protection categories separately how by multidisciplinary, designed, to configure and to be supplied, and make it mutually raise difficult questions for discussion to consider to carry out organically cooperation as a whole and carry out the comprehensive overvoltage protection system of complete and make over-voltage protection function perfect not.
The utility model content
The technical problems to be solved in the utility model, for overcoming weak point of the prior art, provides a kind of overvoltage protector for indirect neutral point-grounding power system in three-phase power grid rational in infrastructure, practical, easy to use.
For solving technical problem of the present utility model, the technical scheme adopted is:
A kind of overvoltage protection with the circuit checkout gear, comprise that each phase bus of the three-phase three wire system on the power consumption equipment, circuit checker and the power consumption equipment side that are electrically connected to each phase bus of three-phase three wire system through vacuum circuit-breaker is protected assembly with surge absorber and arc-extinguishing harmonic-eliminating that asking of ground is equipped with; Described circuit checker, with power consumption equipment, be connected, described circuit checker comprises contact modules, both positive and negative polarity detection module and voltage strength detection module, described contact modules comprises two contact pins, described contact pin contacts respectively positive pole and the negative pole of circuit to be detected, described both positive and negative polarity detection module is connected with described contact modules, and described voltage strength detection module is connected with described contact modules, and described voltage strength grade is corresponding with default range of voltage values; The two ends of described vacuum circuit-breaker are connected in parallel to the circuit breaker inhibitor of restriking; Described surge absorber consists of zinc oxide varistor; Between the neutral point of the voltage transformer primary side in described arc-extinguishing harmonic-eliminating protection assembly and ground, be serially connected with the voltage transformer protector.
In the utility model, the two ends of vacuum circuit-breaker are connected in parallel to the circuit breaker inhibitor of restriking, and the overvoltage produced while cut-offfing be used to limiting vacuum circuit-breaker, restrike to prevent vacuum circuit-breaker; Surge absorber consists of zinc oxide varistor, be used to eliminating Lightning Over-voltage or switching overvoltage; Between the neutral point of the voltage transformer primary side in arc-extinguishing harmonic-eliminating protection assembly and ground, be serially connected with the voltage transformer protector, after preventing the arc grounding Failure elimination, shoving to the harm of voltage transformer when system recovers normal.
The accompanying drawing explanation
Fig. 1 is a kind of basic structure schematic diagram of the present utility model.
Embodiment
As Fig. 1, a kind of overvoltage protection with the circuit checkout gear, comprise that each phase bus of the three-phase three wire system 2 on the power consumption equipment 3, circuit checker and power consumption equipment 3 sides that are electrically connected to each phase bus of three-phase three wire system 2 through vacuum circuit-breaker 1 is protected assembly 5 with surge absorber 4 and arc-extinguishing harmonic-eliminating that asking of ground is equipped with; Described circuit checker 7, with power consumption equipment 3, be connected, described circuit checker 7 comprises contact modules, both positive and negative polarity detection module and voltage strength detection module, described contact modules comprises two contact pins, described contact pin contacts respectively positive pole and the negative pole of circuit to be detected, described both positive and negative polarity detection module is connected with described contact modules, and described voltage strength detection module is connected with described contact modules, and described voltage strength grade is corresponding with default range of voltage values; The two ends of described vacuum circuit-breaker 1 are connected in parallel to the circuit breaker inhibitor 6 of restriking; Described surge absorber 4 consists of zinc oxide varistor; Between the neutral point of the voltage transformer primary side in described arc-extinguishing harmonic-eliminating protection assembly and ground, be serially connected with the voltage transformer protector.
If of the present utility model these are revised and within modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model also is intended to comprise these changes and modification interior.
Claims (1)
1. overvoltage protection with the circuit checkout gear is characterized in that: surge absorber and arc-extinguishing harmonic-eliminating protection assembly that each phase bus that comprises the three-phase three wire system that the power consumption equipment, circuit checker and the power consumption equipment that are electrically connected to each phase bus of three-phase three wire system through vacuum circuit-breaker are other and asking of ground are equipped with; Described circuit checker, with power consumption equipment, be connected, described circuit checker comprises contact modules, both positive and negative polarity detection module and voltage strength detection module, described contact modules comprises two contact pins, described contact pin contacts respectively positive pole and the negative pole of circuit to be detected, described both positive and negative polarity detection module is connected with described contact modules, and described voltage strength detection module is connected with described contact modules, and described voltage strength grade is corresponding with default range of voltage values; The two ends of described vacuum circuit-breaker are connected in parallel to the circuit breaker inhibitor of restriking; Described surge absorber consists of zinc oxide varistor; Between the neutral point of the voltage transformer primary side in described arc-extinguishing harmonic-eliminating protection assembly and ground, be serially connected with the voltage transformer protector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204635166U CN203312787U (en) | 2012-09-12 | 2012-09-12 | Overvoltage protection device with circuit detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204635166U CN203312787U (en) | 2012-09-12 | 2012-09-12 | Overvoltage protection device with circuit detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203312787U true CN203312787U (en) | 2013-11-27 |
Family
ID=49618962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204635166U Expired - Fee Related CN203312787U (en) | 2012-09-12 | 2012-09-12 | Overvoltage protection device with circuit detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203312787U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078960A (en) * | 2014-06-11 | 2014-10-01 | 安徽三和电力技术有限公司 | Electric energy security intelligent detection and control device |
-
2012
- 2012-09-12 CN CN2012204635166U patent/CN203312787U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078960A (en) * | 2014-06-11 | 2014-10-01 | 安徽三和电力技术有限公司 | Electric energy security intelligent detection and control device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201478821U (en) | Overvoltage protector for indirect neutral point-grounding power system in three-phase power grid | |
| CN203180518U (en) | Intelligent switch arc-extinguishing and overvoltage-protecting device | |
| CN203180517U (en) | Microcomputer arc-extinguishing, harmonic-eliminating and overvoltage-protecting device | |
| CN104868461A (en) | Intelligent switch arc-extinguishing and overvoltage-protecting device | |
| CN203312787U (en) | Overvoltage protection device with circuit detection device | |
| CN201018279Y (en) | Arc extinguishing and over-voltage protection device | |
| CN202513569U (en) | Transformer neutral point overvoltage protector | |
| CN211017777U (en) | Arc and harmonic elimination device | |
| CN203014377U (en) | Power grid overvoltage inhibition apparatus | |
| CN202495759U (en) | Over voltage protection device with wireless monitoring system | |
| CN203312788U (en) | Overvoltage protection device with intelligent control system | |
| CN205901262U (en) | Can protect SPD wiring pattern of power frequency overvoltage | |
| CN202535050U (en) | Combined type grounding system for reactance and resistor in power distribution network | |
| CN201388042Y (en) | Central high-voltage switch equal-height cabinet | |
| CN207282396U (en) | A kind of breaker of high-tension switch gear | |
| CN201789267U (en) | Harmonic wave elimination protector of three-phase electricity grid electromagnetic voltage transformator | |
| CN104753031A (en) | Neutral point complete-set protection device | |
| CN219477255U (en) | Connection mode of grounding transformer and neutral point resistor cabinet | |
| CN204681088U (en) | A kind of neutral-point grounding resistance cabinet | |
| CN202282612U (en) | Grounding discharge device | |
| CN203135432U (en) | Arc-resonance extinction route-selecting over-voltage protection device | |
| CN204243750U (en) | Can distinguish in station and arc-extinction device that is outer and motor stator arc grounding of standing | |
| CN201388009Y (en) | Central isolated handcart type arc extinction, harmonic elimination and route selection device | |
| CN202678961U (en) | High-capacity over-voltage absorption device | |
| CN203798982U (en) | Switch electric life test loop for extra-high voltage substation reactive compensation |
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: 20131127 Termination date: 20150912 |
|
| EXPY | Termination of patent right or utility model |