CN207184052U - A kind of thunder-prevention switch cabinet with discharging gap - Google Patents
A kind of thunder-prevention switch cabinet with discharging gap Download PDFInfo
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- CN207184052U CN207184052U CN201721225655.4U CN201721225655U CN207184052U CN 207184052 U CN207184052 U CN 207184052U CN 201721225655 U CN201721225655 U CN 201721225655U CN 207184052 U CN207184052 U CN 207184052U
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- arrester
- discharging gap
- switch cabinet
- thunder
- primary cut
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Abstract
The utility model provides a kind of thunder-prevention switch cabinet with discharging gap, the switch cubicle includes switch cabinet, primary cut-out, voltage transformer, current transformer, bus-bar room and series gap lightning arrester are provided with the switch cabinet, the primary cut-out is connected to the end of incoming cables of switch cubicle, and the end of incoming cables of voltage transformer is connected to the leading-out terminal of primary cut-out；The series gap lightning arrester includes discharging gap and arrester, and arrester connects powered phase conductor by discharging gap.The utility model is by changing the connected mode of arrester and powered phase conductor, it is attached using discharging gap, discharging gap is set just to puncture under high thunderbolt voltage condition, it is failure to actuate in the case of power frequency overvoltage, operation overvoltage, the unnecessary action frequency of arrester is reduced, extends arrester service life；Improve switch cabinet of converting station lightning protection performance and reliability simultaneously.
Description
Technical field
It the utility model is related to switch cabinet of converting station, more particularly to a kind of thunder-prevention switch cabinet with discharging gap.
Background technology
10kV arresters are directly connected to powered phase conductor in original bus PT cabinets, and such arrester can bear work always
Voltage, or under power frequency overvoltage, operation overvoltage, arrester easy zinc oxide resistance sheet overheat or frequent movement cause quick-fried
It is fried；Arrester is set to be directly connected to powered phase conductor if being not provided with discharging gap, arrester is easy during long-term use
Generation accident, and can greatly shorten the service life of arrester；If arrester active component breaks down simultaneously, powered phase
Conductor can be directly grounded generation short circuit.
Utility model content
The technical problems to be solved in the utility model is the defects of being directed to prior art, there is provided a kind of with discharging gap
Thunder-prevention switch cabinet, extend the service life of arrester.
In order to solve the above technical problems, the utility model adopts the following technical scheme that：A kind of lightning protection with discharging gap
Switch cubicle, the switch cubicle include switch cabinet, and it is mutual to be provided with primary cut-out, voltage transformer, electric current in the switch cabinet
Sensor, bus-bar room and series gap lightning arrester, the primary cut-out are connected to the end of incoming cables of switch cubicle, voltage transformer
End of incoming cables be connected to the leading-out terminal of primary cut-out；The series gap lightning arrester includes discharging gap and arrester, keeps away
Thunder device connects powered phase conductor by discharging gap.
Preferably, the thunder-prevention switch cabinet with discharging gap also includes cell, its be divided into handcart room, main bus-bar room,
Transformer room, relay protection and control room etc.；There is door in cabinet front, and all instrument are incorporated into the inner side or control room of door.Inspection
Door is opened when repairing, instrument can be read outside is provided with illumination in cabinets, pass through the oil level of the observation window observable oil-minimum breaker on door
Or the arc-chutes of vacuum circuit breaker, the handcart of handcart switch cabinet at operating position, touch by an insulating contact and secondary isolation
What head was switched on.
Preferably, the discharging gap connects arrester by bus, when thunderbolt voltage is no more than the setting value of arrester
When, discharging gap is not breakdown；During the setting value for exceeding arrester when the voltage pole that is struck by lightning is high, the breakdown electric discharge of discharging gap, protect
Protect arrester.
Preferably, a kind of described thunder-prevention switch cabinet with discharging gap also includes measuring and controlling protective device, the observing and controlling
Protection device connects current transformer and voltage transformer respectively, is controlled monitoring to the state in the loop of switch cubicle and protects
Shield；When short circuit, overload, single-phase earthing occur for loop, measuring and controlling protective device can make short-circuit protection in real time, overload protection is protected
The operation such as shield.Short-circuit protection is almost can be ignored in circuit malfunctions, such as without overload, the resistance of wire,
Therefore greatly electric current offer is cut off the electricity supply caused by moment, is prevented device damage and is caused the accident；Overload protection refers to when electricity
Cut off the electricity supply when total current exceedes the rated current that the section lead can be born caused by the load in starting state simultaneously in road,
Wire etc. is prevented to be damaged.
Preferably, the primary cut-out is 10kV vacuum high-pressure breakers, and it is used for 10kV switch cubicle circuits and stops sending
Electricity, the 10kV vacuum high-pressures breaker include motor-operating mechanism, separating brake, switch-on operating mechanism as primary cut-out；
When electric current is no more than rated current in loop, primary cut-out does not operate；It is high when electric current exceedes rated current in loop
The real-time cutoff circuit of voltage breaker.
Preferably, the separating brake, combined floodgate provide energy by spring, and spring then passes through energy storage motor holddown spring and carries out energy
Amount storage.
Preferably, a kind of described thunder-prevention switch cabinet with discharging gap also includes charged display device and with electric induction
Device, charged display device connect band electrical induction device, charged display device are arranged at switch cubicle front end；When band electrical induction device
When detecting the separating brake of primary cut-out, closing a floodgate abnormal, its testing result is fed back into charged display device, by described powered aobvious
Showing device carries out display warning when powered.
Preferably, the series gap lightning arrester is connected in the bus-bar room cabinet below handcart.
Preferably, a kind of thunder-prevention switch cabinet with discharging gap also includes disconnecting switch, the disconnecting switch bag
Include a feed isolating switch, an outlet disconnecting switch and an earthing isolator；The feed isolating switch and outlet are kept apart
Close when 10kV switch cubicles are stopped transport or are overhauled, switch cubicle and the position of other electrical connections is had an obvious cut-off point,
To ensure safety, earthing isolator is mainly used in the safety measure set when 10kV switch cubicles overhaul.
The beneficial effects of the utility model are：By setting discharging gap so that discharging gap is in high thunderbolt voltage
In the case of just breakdown conducting, and when the voltage that is struck by lightning is no more than the setting value of arrester, discharging gap is not breakdown；Same
The Analyse of Reject-acting Arrester in the case of power frequency overvoltage, operation overvoltage, so as to reduce the unnecessary action frequency of arrester；Series connection
Discharging gap causes arrester resistor disc to be almost not subject to the effect of power-frequency voltage, extends the service life of arrester, another
Aspect also reduces arrester working amount of periodical repair；If arrester active component breaks down, the discharging gap structure with series connection
Faulty lightning arrester body can be kept apart, avoid powered phase conductor from being directly grounded the situation of short circuit.
Brief description of the drawings
Fig. 1 is discharging gap schematic diagram of the present utility model；
Fig. 2 is configuration diagram of the present utility model.
Embodiment
In the present embodiment, referring to Figures 1 and 2, a kind of thunder-prevention switch cabinet with discharging gap, the switch cubicle includes switch
Cabinet 100, primary cut-out 101, voltage transformer 103, current transformer 102, female is provided with the switch cabinet 100
Line room 104 and series gap lightning arrester 105, the primary cut-out 101 are connected to the end of incoming cables of switch cubicle, mutual induction of voltage
The end of incoming cables of device 103 is connected to the leading-out terminal of primary cut-out 101；The series gap lightning arrester 105 includes discharging gap
And arrester, arrester connect powered phase conductor by discharging gap；Discharging gap connects arrester by bus, when thunderbolt electricity
When pressure is no more than the setting value of arrester, discharging gap is not breakdown；During the setting value for exceeding arrester when the voltage pole that is struck by lightning is high,
The breakdown electric discharge of discharging gap, arrester is protected, and series gap lightning arrester 105 is connected in the cabinet of bus-bar room 104 under handcart
Side；Switch cubicle also includes the devices such as shell partition plates, panel, circuit breaker cart, cable vault, low-pressure chamber and interlocking/protection.
Measuring and controlling protective device 106 connects current transformer 102 and voltage transformer 103 respectively, to the loop of switch cubicle
State is controlled monitoring and protection；When short circuit, overload, single-phase earthing occur for loop, measuring and controlling protective device 106 can be real-time
Make the operation such as short-circuit protection, overload protection and one-phase ground protection；Primary cut-out 101 is the open circuit of 10kV vacuum high-pressures
Device, it is used for 10kV switch cubicle circuits and stops power transmission, and the 10kV vacuum high-pressures breaker includes motor-operating mechanism, as high pressure
Separating brake, the switch-on operating mechanism of breaker 101, separating brake, close a floodgate provides energy by spring, and spring is then compressed by energy storage motor
Spring carries out energy stores；When electric current is no more than rated current in loop, primary cut-out 101 does not operate；When in loop
When electric current exceedes rated current, 101 real-time cutoff circuit of primary cut-out.
Thunder-prevention switch cabinet with discharging gap also includes charged display device 107, band electrical induction device 108 and kept apart
Close, the connect band electrical induction device 108 of charged display device 107, charged display device 107 is arranged at switch cubicle front end；When powered
When induction installation 108 detects the separating brake of primary cut-out 101, closes a floodgate abnormal, its testing result is fed back into powered display and filled
107 are put, display warning is carried out when powered by the charged display device 107；Disconnecting switch include a feed isolating switch,
One outlet disconnecting switch and an earthing isolator；The feed isolating switch and outlet disconnecting switch are stopped transport in 10kV switch cubicles
Or during maintenance, switch cubicle and the position of other electrical connections is had an obvious cut-off point, to ensure safety, ground connection isolation
Switch is mainly used in the safety measure set when 10kV switch cubicles overhaul.
The utility model is by setting discharging gap so that discharging gap is just breakdown under high thunderbolt voltage condition
Conducting, and when the voltage that is struck by lightning is no more than the setting value of arrester, discharging gap is not breakdown；It is same in power frequency overvoltage, behaviour
Analyse of Reject-acting Arrester in the case of work overvoltage, so as to reduce the unnecessary action frequency of arrester；The discharging gap of series connection causes
Arrester resistor disc is almost not subject to the effect of power-frequency voltage, extends the service life of arrester, on the other hand also reduces and keeps away
Thunder device working amount of periodical repair；If arrester active component breaks down, the discharging gap structure with series connection can will be faulty
Lightning arrester body is kept apart, and avoids powered phase conductor from being directly grounded the situation of short circuit.
The utility model is described in detail above, it is described above, only the preferred embodiment of the utility model and
, it is when the utility model practical range can not be limited, i.e., all to make equivalent changes and modifications according to the application scope, it all should still belong to this
In utility model covering scope.
Claims (7)
1. a kind of thunder-prevention switch cabinet with discharging gap, the switch cubicle includes switch cabinet, is provided with the switch cabinet
Primary cut-out, voltage transformer, current transformer, bus-bar room and series gap lightning arrester, it is characterised in that the height
Voltage breaker is connected to the end of incoming cables of switch cubicle, and the end of incoming cables of voltage transformer is connected to the leading-out terminal of primary cut-out；It is described
Series gap lightning arrester includes discharging gap and arrester, and arrester connects powered phase conductor by discharging gap.
A kind of 2. thunder-prevention switch cabinet with discharging gap according to claim 1, it is characterised in that the discharging gap
Arrester is connected by bus, when the voltage that is struck by lightning is no more than the setting value of arrester, discharging gap is not breakdown；When thunderbolt electricity
When pressing high setting value more than arrester, the breakdown electric discharge of discharging gap, arrester is protected.
3. a kind of thunder-prevention switch cabinet with discharging gap according to claim 1, it is characterised in that also protected including observing and controlling
Protection unit, the measuring and controlling protective device connect current transformer and voltage transformer respectively, and the state in the loop of switch cubicle is entered
Row control monitoring and protection.
A kind of 4. thunder-prevention switch cabinet with discharging gap according to claim 3, it is characterised in that the high pressure open circuit
Device is 10kV vacuum high-pressure breakers, and it includes motor-operating mechanism, separating brake, switch-on operating mechanism as primary cut-out,
When electric current is no more than rated current in loop, primary cut-out does not operate；It is high when electric current exceedes rated current in loop
The real-time cutoff circuit of voltage breaker.
5. a kind of thunder-prevention switch cabinet with discharging gap according to claim 4, it is characterised in that the separating brake, conjunction
Lock provides energy by spring, and spring then carries out energy stores by energy storage motor holddown spring.
6. a kind of thunder-prevention switch cabinet with discharging gap according to claim 4, it is characterised in that also including powered aobvious
Showing device and with electrical induction device, charged display device connect band electrical induction device, before charged display device is arranged at switch cubicle
End；When detecting the separating brake of primary cut-out with electrical induction device, closing a floodgate abnormal, its testing result is fed back into powered display
Device, display warning is carried out when powered by the charged display device.
A kind of 7. thunder-prevention switch cabinet with discharging gap according to claim 1, it is characterised in that the series gap
Lightning arrester is connected in the bus-bar room cabinet below handcart.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721225655.4U CN207184052U (en) | 2017-09-22 | 2017-09-22 | A kind of thunder-prevention switch cabinet with discharging gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721225655.4U CN207184052U (en) | 2017-09-22 | 2017-09-22 | A kind of thunder-prevention switch cabinet with discharging gap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207184052U true CN207184052U (en) | 2018-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721225655.4U Active CN207184052U (en) | 2017-09-22 | 2017-09-22 | A kind of thunder-prevention switch cabinet with discharging gap |
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| CN (1) | CN207184052U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114336562A (en) * | 2021-12-03 | 2022-04-12 | 广东电网有限责任公司 | Transformer lightning overvoltage protection device |
-
2017
- 2017-09-22 CN CN201721225655.4U patent/CN207184052U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114336562A (en) * | 2021-12-03 | 2022-04-12 | 广东电网有限责任公司 | Transformer lightning overvoltage protection device |
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