CN104901300A - Arc-suppression and over-voltage protection device for intelligent switch - Google Patents
Arc-suppression and over-voltage protection device for intelligent switch Download PDFInfo
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- CN104901300A CN104901300A CN201510393085.9A CN201510393085A CN104901300A CN 104901300 A CN104901300 A CN 104901300A CN 201510393085 A CN201510393085 A CN 201510393085A CN 104901300 A CN104901300 A CN 104901300A
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Abstract
The invention discloses an arc-suppression and over-voltage protection device for an intelligent switch, and relates to the technical field of arc suppression and harmonic elimination of power systems. The arc-suppression and over-voltage protection device comprises a vacuum circuit breaker which can be in mono-phasic action, a voltage transformer, a three-phase combined type over-voltage protector, a micro-computer arc-suppression controller, a high voltage fuse and a zero-sequence current transformer, wherein three-phase ports of the over-voltage protector are connected with three phases of the high voltage fuse respectively and then are connected with a high-voltage isolating switch; a grounding end of the over-voltage protector is grounded after being connected with the voltage transformer; a voltage transformer control end of the micro-computer arc-suppression controller is connected with the voltage transformer; a control end of a vacuum contactor is connected with the vacuum circuit breaker which can be in mono-phasic action; three-phase ports of the vacuum circuit breaker which can be in mono-phasic action are connected with the three-phase high-voltage isolating switch respectively; and the zero-sequence current transformer is arranged between the grounding end and a grounding point. According to the arc-suppression and over-voltage protection device, fault phase and fault type are judged according to a signal provided by the voltage transformer, and are displayed, so that the action speed is fast, and the problems such as arc suppression, harmonic elimination and the like in the over-voltage protection device are effectively solved.
Description
Technical field
The present invention relates to electric power system extinguishing arc, harmonic elimination technical field, be specifically related to a kind of microcomputer arc extinguishing harmonic elimination and over-pressure safety device.
Background technology
Current 3-35KW neutral point indirect earthing, neutral by arc extinction coil grounding or neutral point are in the electric power system of high resistance ground; because all kinds of overvoltage protection device is without extinguishing arc, harmonic elimination function; or function singleness; thus can not effectively avoid because of the atmospheric over-voltage that system is alternate and cause between phase ground, the single-phase generation to accidents such as having a rest property arc grounding over-voltage, ferro-resonance over-voltages, these overvoltage form certain threat to the life-span of power system device and security of operation.
Summary of the invention
The object of this invention is to provide a kind of quick action, the overvoltage protection of energy extinguishing arc, harmonic elimination.
In order to solve in background technology existing problem, the present invention is by the following technical solutions: it comprise can the vacuum circuit-breaker LKJKZ of monophasic action, voltage transformer pt, three phase combined over-voltage protector LBP, microcomputer arc extinguishing controller ZK, high-tension fuse RD, zero sequence current mutual inductor LH;
Described microcomputer arc extinguishing controller ZK comprises voltage transformer control end, vacuum contactor control end;
Three-phase high-voltage isolating switch is connect after the three-phase port of described three-phase combined voltage protector LBP is connected with three of high-tension fuse RD respectively, ground connection after three phase combined over-voltage protector LBP earth terminal is connected with voltage transformer pt, the voltage transformer control end of microcomputer arc extinguishing controller ZK is connected with voltage transformer pt, vacuum contactor control end with can the vacuum circuit-breaker LKJKZ of monophasic action be connected, the three-phase port of vacuum circuit-breaker LKJKZ of monophasic action can connect three-phase high-voltage isolating switch respectively, can the vacuum circuit-breaker LKJKZ earth terminal ground connection of monophasic action, zero sequence current mutual inductor LH can be provided with between the vacuum circuit-breaker LKJKZ earth terminal of monophasic action and earth point.
When there is single-phase interval phase arc grounding fault, microcomputer arc extinguishing controller mutually the vacuum circuit-breaker of monophasic action can send action command, device can action in 30ms, the arc grounding of instability is converted into stable metallic ground, the overvoltage Limiting on-Line Voltage level that arc grounding causes, greatly reduce time that single-phase earthing arc light continues and the insulation breakdown short circuit accident caused thus and Explosion of on Arrester accident, with the vacuum circuit-breaker of monophasic action replacing the extinguishing arc scheme that traditional high-voltage and current-limitation fuse adds AC vacuum contactor, decrease the workload of regular maintenance and change the expense of fuse.
Intelligent switch extinguishing arc of the present invention and overvoltage protection; with microcomputer arc extinguishing controller for core control part; the signal provided according to voltage transformer judges the separate and fault type of fault and shows; quick action of the present invention, efficiently solves the problem such as arc-extinguishing harmonic-eliminating in overvoltage protection.
Accompanying drawing explanation
Fig. 1 is electrical schematic diagram of the present invention.
Embodiment
See Fig. 1, a kind of intelligent switch extinguishing arc and overvoltage protection, it comprise can the vacuum circuit-breaker LKJKZ of monophasic action, voltage transformer pt, three phase combined over-voltage protector LBP, microcomputer arc extinguishing controller ZK, high-tension fuse RD, zero sequence current mutual inductor LH;
Described microcomputer arc extinguishing controller ZK comprises voltage transformer control end, vacuum contactor control end;
Three-phase high-voltage isolating switch is connect after the three-phase port of described three-phase combined voltage protector LBP is connected with three of high-tension fuse RD respectively, ground connection after three phase combined over-voltage protector LBP earth terminal is connected with voltage transformer pt, the voltage transformer control end of microcomputer arc extinguishing controller ZK is connected with voltage transformer pt, vacuum contactor control end with can the vacuum circuit-breaker LKJKZ of monophasic action be connected, the three-phase port of vacuum circuit-breaker LKJKZ of monophasic action can connect three-phase high-voltage isolating switch respectively, can the vacuum circuit-breaker LKJKZ earth terminal ground connection of monophasic action, zero sequence current mutual inductor LH can be provided with between the vacuum circuit-breaker LKJKZ earth terminal of monophasic action and earth point.
When there is single-phase interval phase arc grounding fault, microcomputer arc extinguishing controller mutually the vacuum circuit-breaker of monophasic action can send action command, device can action in 30ms, the arc grounding of instability is converted into stable metallic ground, the overvoltage Limiting on-Line Voltage level that arc grounding causes, greatly reduce time that single-phase earthing arc light continues and the insulation breakdown short circuit accident caused thus and Explosion of on Arrester accident, with the vacuum circuit-breaker of monophasic action replacing the extinguishing arc scheme that traditional high-voltage and current-limitation fuse adds AC vacuum contactor, decrease the workload of regular maintenance and change the expense of fuse.
Intelligent switch extinguishing arc of the present invention and overvoltage protection; with microcomputer arc extinguishing controller for core control part; the signal provided according to voltage transformer judges the separate and fault type of fault and shows; quick action of the present invention, efficiently solves the problem such as arc-extinguishing harmonic-eliminating in overvoltage protection.
Claims (2)
1. intelligent switch extinguishing arc and overvoltage protection, it is characterized in that, it comprises can vacuum circuit-breaker (LKJKZ), voltage transformer (PT), three phase combined over-voltage protector (LBP), microcomputer arc extinguishing controller (ZK), high-tension fuse (RD), the zero sequence current mutual inductor (LH) of monophasic action; Described microcomputer arc extinguishing controller (ZK) comprises voltage transformer control end, vacuum contactor control end.
2. after the three-phase port of the three-phase combined voltage protector (LBP) described in is connected with three of high-tension fuse (RD) respectively, connect three-phase high-voltage isolating switch, ground connection after three phase combined over-voltage protector (LBP) earth terminal is connected with voltage transformer (PT), the voltage transformer control end of microcomputer arc extinguishing controller (ZK) is connected with voltage transformer (PT), vacuum contactor control end with can the vacuum circuit-breaker (LKJKZ) of monophasic action be connected, the three-phase port of vacuum circuit-breaker (LKJKZ) of monophasic action can connect three-phase high-voltage isolating switch respectively, can vacuum circuit-breaker (LKJKZ) the earth terminal ground connection of monophasic action, the vacuum circuit-breaker (LKJKZ) of monophasic action zero sequence current mutual inductor (LH) between earth terminal and earth point, can be provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510393085.9A CN104901300A (en) | 2015-07-07 | 2015-07-07 | Arc-suppression and over-voltage protection device for intelligent switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510393085.9A CN104901300A (en) | 2015-07-07 | 2015-07-07 | Arc-suppression and over-voltage protection device for intelligent switch |
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| CN104901300A true CN104901300A (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510393085.9A Pending CN104901300A (en) | 2015-07-07 | 2015-07-07 | Arc-suppression and over-voltage protection device for intelligent switch |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201956666U (en) * | 2011-01-21 | 2011-08-31 | 合肥徽力电气技术有限公司 | High-voltage flexible safety device |
| CN203180518U (en) * | 2013-01-22 | 2013-09-04 | 合肥隆科电力设备有限责任公司 | Intelligent switch arc-extinguishing and overvoltage-protecting device |
| CN104124680A (en) * | 2014-06-09 | 2014-10-29 | 安徽金捷光电科技有限公司 | Arc harmonic elimination, line selection and overvoltage protection device |
| US20150124358A1 (en) * | 2013-11-01 | 2015-05-07 | Eaton Corporation | Feeder power source providing open feeder detection for a network protector by shifted neutral |
-
2015
- 2015-07-07 CN CN201510393085.9A patent/CN104901300A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201956666U (en) * | 2011-01-21 | 2011-08-31 | 合肥徽力电气技术有限公司 | High-voltage flexible safety device |
| CN203180518U (en) * | 2013-01-22 | 2013-09-04 | 合肥隆科电力设备有限责任公司 | Intelligent switch arc-extinguishing and overvoltage-protecting device |
| US20150124358A1 (en) * | 2013-11-01 | 2015-05-07 | Eaton Corporation | Feeder power source providing open feeder detection for a network protector by shifted neutral |
| CN104124680A (en) * | 2014-06-09 | 2014-10-29 | 安徽金捷光电科技有限公司 | Arc harmonic elimination, line selection and overvoltage protection device |
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Application publication date: 20150909 |