CN207353841U - Extinguishing arc contactor device for preventing unwanted operation - Google Patents
Extinguishing arc contactor device for preventing unwanted operation Download PDFInfo
- Publication number
- CN207353841U CN207353841U CN201721324393.7U CN201721324393U CN207353841U CN 207353841 U CN207353841 U CN 207353841U CN 201721324393 U CN201721324393 U CN 201721324393U CN 207353841 U CN207353841 U CN 207353841U
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- China
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- extinguishing arc
- phase
- arc contactor
- individual
- voltage sensor
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Abstract
The utility model discloses a kind of extinguishing arc contactor device for preventing unwanted operation.It includes the three-phase voltage sensor (2) and individual-phase control extinguishing arc contactor normally open contact (3) being connected across between busbar (1) and ground wire (4), and its input terminal is electrically connected with the secondary side of three-phase voltage sensor (2), the extinguishing arc control unit (7) that output terminal is electrically connected with individual-phase control extinguishing arc contactor coil (5), normally closed switch (6) is connected in series with the circuit of individual-phase control extinguishing arc contactor coil (5), control terminal of the output terminal of extinguishing arc control unit (7) also with normally closed switch (6) is electrically connected, during for arc grounding to occur, when 1.3 times of output >=normal value of three-phase voltage sensor (2), send the signal for disconnecting the normally closed switch (6) of exceptional value phase in individual-phase control extinguishing arc contactor coil (5).It has prevented the malfunction of extinguishing arc contactor, can be widely used in 6 35kV neutral points not in the arc-extinction device of solidly grounded system.
Description
Technical field
A kind of device for preventing unwanted operation is the utility model is related to, especially a kind of extinguishing arc contactor device for preventing unwanted operation.
Background technology
In the system that the 6-35kV neutral points of China's distribution network are not directly grounded, singlephase earth fault is a kind of common
Failure.At present, people often configure mainly by failure line selection component, extinguishing arc control unit in systems in order to handle this kind of failure
The arc-extinction device of part and individual-phase control extinguishing arc contactor composition；For when system occur single-phase arc grounding failure when, extinguishing arc control
The fault phase information that component processed is provided according to failure line selection component, controls failure phase contact in individual-phase control extinguishing arc contactor to close
Close, by arc grounding short circuit into metallic ground, arc current is kept to zero, so that arc light extinguishes.Though above device can have
Effect ground extinguishes electric arc, but also there is shortcoming：When system occur intermittent arc grounding failure when, because its generation it is excessively electric
Pressure is the most serious --- and 3.1-3.5 times during up to normal operation, even more high, so high overvoltage easily disturbs split-phase control
The coil of extinguishing arc contactor processed, malfunctions individual-phase control extinguishing arc contactor, so as to cause phase fault, cause accident into one
Step expands.
Utility model content
The technical problems to be solved in the utility model is to overcome shortcoming of the prior art, there is provided one kind is grounded
During failure, it can effectively prevent the extinguishing arc contactor device for preventing unwanted operation of individual-phase control extinguishing arc contactor malfunction.
To solve the technical problem of the utility model, used technical solution is extinguishing arc contactor device for preventing unwanted operation bag
Include the three-phase voltage sensor being connected across between busbar and ground wire and individual-phase control extinguishing arc contactor normally open contact, and its input terminal
It is electrically connected with the secondary side of three-phase voltage sensor, the extinguishing arc control that output terminal is electrically connected with individual-phase control extinguishing arc contactor coil
Component, particularly：
Normally closed switch is connected in series with the circuit of the individual-phase control extinguishing arc contactor coil；
Control terminal of the output terminal of the extinguishing arc control unit also with the normally closed switch is electrically connected, and is connect for arc light to occur
During ground, when 1.3 times of output >=normal value of three-phase voltage sensor, send and disconnect in individual-phase control extinguishing arc contactor coil
The signal of the normally closed switch of exceptional value phase.
Further as extinguishing arc contactor device for preventing unwanted operation is improved：
Preferably, three-phase voltage sensor is electromagnetic potential transformer, or resitstance voltage divider, or capacitive divider, or
Capacitance type potential transformer, or Hall voltage sensor.
Preferably, normally closed switch is mechanical contact switch, or electronic non-contact switch.
Preferably, extinguishing arc control unit is comparator, or microcontroller, or digital signal processor, or microcomputer.
It is relative to the beneficial effect of the prior art：
After such structure, when system occur arc grounding failure when, as long as because its generation overvoltage be more than etc.
In 1.3 times of three-phase voltage sensor output normal value, extinguishing arc control unit, which will be sent, disconnects individual-phase control extinguishing arc contactor
The signal of the normally closed switch of exceptional value phase in coil, makes time of the individual-phase control extinguishing arc contactor coil corresponding to the exceptional value phase
Road disconnects, and has prevented the malfunction of extinguishing arc contactor；It is set to can be widely used in 6-35kV neutral points not solidly grounded system
Arc-extinction device in.
Brief description of the drawings
Fig. 1 is a kind of basic structure circuit diagram of the utility model.
Embodiment
The preferred embodiment of the utility model is described in further detail below in conjunction with the accompanying drawings.
Referring to Fig. 1, the composition of extinguishing arc contactor device for preventing unwanted operation is as follows：
The busbar 1 of distribution network is connected to three-phase voltage sensor 2 with 4 span of ground wire and individual-phase control extinguishing arc contactor is normally opened
Contact 3；Wherein, the secondary side of three-phase voltage sensor 2 is electrically connected with the input terminal of extinguishing arc control unit 7, extinguishing arc control unit 7
Output terminal be electrically connected with being connected in series with the individual-phase control extinguishing arc contactor coil 5 of normally closed switch 6 in its circuit, extinguishing arc control
Control terminal of the output terminal of component 7 also with normally closed switch 6 is electrically connected.
Above-mentioned three-phase voltage sensor 2 is electromagnetic potential transformer (or resitstance voltage divider, or capacitive divider, or electricity
Appearance formula voltage transformer, or Hall voltage sensor), normally closed switch 6 for mechanical contact switch, (or open by electronic non-contact
Close), extinguishing arc control unit 7 is comparator (or microcontroller, or digital signal processor, or microcomputer).
In use, only need first to select each component applied to the voltage class in electric system according to the utility model
Electric parameter, then the busbar 1 of the utility model is electrically connected with distribution network.
When arc grounding occurs for the distribution network system that neutral point is not directly grounded, 2 secondary side of three-phase voltage sensor
Output can change significantly, these changes can be detected by extinguishing arc control unit 7 is instant, and are made and sentenced according to its size
It is fixed：If 1.3 times of >=normal value, the normally closed switch 6 for disconnecting exceptional value phase in individual-phase control extinguishing arc contactor coil 5 will be sent
Signal, disconnect the circuit of 5 exceptional value phase of individual-phase control extinguishing arc contactor coil, so as to prevent the malfunction of extinguishing arc contactor
Make.
Obviously, those skilled in the art can carry out various change to the extinguishing arc contactor device for preventing unwanted operation of the utility model
Spirit and scope of the dynamic and modification without departing from the utility model.If in this way, these modifications and variations to the utility model
Belong within the scope of the utility model claims and its equivalent technologies, then the utility model be also intended to comprising these change and
Including modification.
Claims (4)
1. a kind of extinguishing arc contactor device for preventing unwanted operation, including the three-phase voltage sensor being connected across between busbar (1) and ground wire (4)
(2) and individual-phase control extinguishing arc contactor normally open contact (3), and its input terminal and three-phase voltage sensor (2) secondary side electricity
The extinguishing arc control unit (7) that connection, output terminal are electrically connected with individual-phase control extinguishing arc contactor coil (5), it is characterised in that：
Normally closed switch (6) is connected in series with the circuit of the individual-phase control extinguishing arc contactor coil (5)；
Control terminal of the output terminal of the extinguishing arc control unit (7) also with the normally closed switch (6) is electrically connected, for arc light to occur
During ground connection, when 1.3 times of output >=normal value of three-phase voltage sensor (2), send and disconnect individual-phase control extinguishing arc contactor
The signal of the normally closed switch (6) of exceptional value phase in coil (5).
2. extinguishing arc contactor device for preventing unwanted operation according to claim 1, it is characterized in that three-phase voltage sensor (2) is electromagnetism
Formula voltage transformer, or resitstance voltage divider, or capacitive divider, or capacitance type potential transformer, or Hall voltage sensor.
3. extinguishing arc contactor device for preventing unwanted operation according to claim 1, it is characterized in that normally closed switch (6) is mechanical contact
Switch, or electronic non-contact switch.
4. extinguishing arc contactor device for preventing unwanted operation according to claim 1, it is characterized in that extinguishing arc control unit (7) is to compare
Device, or microcontroller, or digital signal processor, or microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721324393.7U CN207353841U (en) | 2017-10-16 | 2017-10-16 | Extinguishing arc contactor device for preventing unwanted operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721324393.7U CN207353841U (en) | 2017-10-16 | 2017-10-16 | Extinguishing arc contactor device for preventing unwanted operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207353841U true CN207353841U (en) | 2018-05-11 |
Family
ID=62358373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721324393.7U Active CN207353841U (en) | 2017-10-16 | 2017-10-16 | Extinguishing arc contactor device for preventing unwanted operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207353841U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649543A (en) * | 2018-05-25 | 2018-10-12 | 贵州万峰电力股份有限公司 | Based on the interlocking high voltage connector device for preventing unwanted operation of relay |
-
2017
- 2017-10-16 CN CN201721324393.7U patent/CN207353841U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649543A (en) * | 2018-05-25 | 2018-10-12 | 贵州万峰电力股份有限公司 | Based on the interlocking high voltage connector device for preventing unwanted operation of relay |
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