CN201388009Y - Central isolated handcart type arc extinction, harmonic elimination and route selection device - Google Patents
Central isolated handcart type arc extinction, harmonic elimination and route selection device Download PDFInfo
- Publication number
- CN201388009Y CN201388009Y CN200920024109U CN200920024109U CN201388009Y CN 201388009 Y CN201388009 Y CN 201388009Y CN 200920024109 U CN200920024109 U CN 200920024109U CN 200920024109 U CN200920024109 U CN 200920024109U CN 201388009 Y CN201388009 Y CN 201388009Y
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- selection device
- arc extinction
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Abstract
The utility model relates to a central isolated handcart type arc extinction, harmonic elimination and route selection device, belonging to the over-voltage protection technical field. The device comprises a cabinet body and is characterized in that an isolated handcart is arranged in the cabinet body; an over-voltage protector is arranged on the isolated handcart; the bottom part of the cabinet body is provided with two groups of vacuum contactors and one group of high-voltage capacitors; a high-voltage current-limiting fuse and an intelligent controller are arranged at the upper part in the cabinet body; and the cabinet body is a high-low cabinet. The device can replace a voltage transformer cabinet to provide the voltage monitoring function, can replace an arc extinction coil to eliminate the intermittent arc-light ground fault and have the function of limiting the arc-light ground over voltage that the arc extinction coil does not have, and can replace various harmonic eliminators to limit and eliminate the resonance oscillation over voltage.
Description
Technical field
The utility model belongs to a kind of overvoltage protection, is specifically related to a kind of mid-cabinet type isolation truck type extinguishing arc resonance eliminating wire-selection device.
Background technology
The electrical network of China 3～35kV (66kV) non_direct ground, when Single Phase Metal ground connection is taken place, the voltage to earth of all the other two-phases will be increased to line voltage (UL), thereby the electric equipment of this class electrical network, insulation against ground level as transformer, voltage/current instrument transformer, circuit breaker, cable line etc. can both satisfy the requirement of bearing the effect of line voltage for a long time and not damaging.
Traditional concept is unilateral to be thought, 3～35kV electrical network belongs to medium voltage distribution network, and the amplitude of internal overvoltage is not high in this type of electrical network, so the principal element that jeopardizes line insulation safety should not be an internal overvoltage, but atmospheric over-voltage.Thereby the overvoltage protection measure of taking for a long time is only at preventing atmospheric over-voltage, and the major technique measure only limits to install various types of lightning arresters, and its protection value is higher, does not play any protective effect for internal overvoltage.
Yet along with the development of electrical network, overhead transmission line is progressively replaced by the cable line of solid insulation.Because the build-up effect that solid insulation punctures, its internal overvoltage, particularly arc grounding overvoltage that produces during electrical network generation single phase intermittent arc grounding and the ferro-resonance over-voltage that excites have therefrom become one of this class electric power netting safe running and have threatened greatly.Wherein serious with single-phase arc grounding overvoltage.
Existing operating standard regulation when non-direct ground system generation single phase ground fault, allows to continue operation two hours, as through the approval of higher level department, can also prolong.If single phase ground fault is an arc grounding, then its overvoltage can reach the peak value of 3.5 times of normal operation phase voltages, under high like this overvoltage continuous action, certainly will cause the accumulation damage of insulation of electrical installation, cause in the insulation weak link that perfects phase to puncture over the ground and then cause the phase fault accident.
Summary of the invention
The utility model purpose provides a kind of mid-cabinet type isolation truck type extinguishing arc resonance eliminating wire-selection device; be mainly used in the electric power system of 3～35kV neutral non-effective grounding, provide reliably protecting the various overvoltage of this class electrical network, particularly single phase intermittent arcing ground over-voltage and resonance overvoltage.
The following technical scheme of the concrete employing of the utility model:
A kind of mid-cabinet type isolation truck type extinguishing arc resonance eliminating wire-selection device comprises cabinet, it is characterized in that,
The isolation handcart is set in the cabinet, on the isolation handcart, overvoltage protection device is set;
Bottom of cabinet bulk is provided with 2 groups of vacuum contactors and 1 group of high-voltage capacitor;
On in the cabinet intelligent controller is set;
Described cabinet is a high-low cabinet.
Described cabinet has panel, has electromagnetic lock and high-voltage charge display device on the panel.
Compared with prior art, advantage of the present utility model is:
1) the utility model instead of voltage instrument transformer cabinet provides the voltage monitoring function; Substitute arc suppression coil, eliminate the intermittent arc grounding fault, and have the function of the restriction arc light grounding surge that arc suppression coil do not have; Substitute all kinds of resonance eliminators, restriction is also eliminated resonance overvoltage.
2) has the restriction lightning overvoltage, the function of atmospheric over-voltage switching overvoltage.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the utility model panel construction schematic diagram.
Among the figure, 1 is vacuum contactor, and 2 is high-voltage capacitor, and 3 is high-voltage and current-limitation fuse, and 4 for isolating handcart, and 5 is the overcurrent protection device, and 6 is sleeve pipe, and 7 is electromagnetic lock, and 8 is high-voltage charge display device, and 9 is intelligent controller.
Embodiment
Embodiment
As shown in Figure 1, a kind of mid-cabinet type isolation truck type extinguishing arc resonance eliminating wire-selection device comprises cabinet, is provided with in the cabinet to isolate handcart 4, on isolation handcart 4 overvoltage protection device 5 is set, and bottom of cabinet bulk is provided with two groups of vacuum contactors 1 and one group of high-voltage capacitor 2; On in the cabinet intelligent controller 9 is set; Described cabinet is a high-low cabinet.
As shown in Figure 2, described cabinet has panel, has sleeve pipe 6, electromagnetic lock 7 and high-voltage charge display device 8 on the panel.
The utility model electrical schematic is same as the prior art.
Claims (2)
1. a mid-cabinet type isolation truck type extinguishing arc resonance eliminating wire-selection device comprises cabinet, it is characterized in that,
The isolation handcart is set in the cabinet, on the isolation handcart, overvoltage protection device is set;
Bottom of cabinet bulk is provided with 2 groups of vacuum contactors and 1 group of high-voltage capacitor;
On in the cabinet high-voltage and current-limitation fuse, intelligent controller are set;
Described cabinet is a high-low cabinet.
2. mid-cabinet type isolation truck type extinguishing arc resonance eliminating wire-selection device according to claim 1 is characterized in that described cabinet has panel, has sleeve pipe, electromagnetic lock and high-voltage charge display device on the panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920024109U CN201388009Y (en) | 2009-03-24 | 2009-03-24 | Central isolated handcart type arc extinction, harmonic elimination and route selection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920024109U CN201388009Y (en) | 2009-03-24 | 2009-03-24 | Central isolated handcart type arc extinction, harmonic elimination and route selection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201388009Y true CN201388009Y (en) | 2010-01-20 |
Family
ID=41580551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920024109U Expired - Fee Related CN201388009Y (en) | 2009-03-24 | 2009-03-24 | Central isolated handcart type arc extinction, harmonic elimination and route selection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201388009Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608483A (en) * | 2012-02-22 | 2012-07-25 | 北京航空航天大学 | Direction diagnosing system of grounded fault of small current grounded distribution system |
-
2009
- 2009-03-24 CN CN200920024109U patent/CN201388009Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608483A (en) * | 2012-02-22 | 2012-07-25 | 北京航空航天大学 | Direction diagnosing system of grounded fault of small current grounded distribution system |
| CN102608483B (en) * | 2012-02-22 | 2014-04-16 | 北京航空航天大学 | Direction diagnosing system of grounded fault of small current grounded distribution system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100120 Termination date: 20140324 |