CN207818459U - A kind of 10kV pole-mounted circuit breakers - Google Patents

Abstract

The utility model discloses a kind of 10kV pole-mounted circuit breakers, including case for circuit breaker, vacuum interrupter, input terminal, outlet terminal, the capacitive partial pressure sensor being arranged in case for circuit breaker and low-power consumption coil current sensor, capacitive partial pressure sensor primary connection end is connect with circuit breaker internal high-voltage line, and the secondary connection end of capacitive partial pressure sensor is connect with the socket on case for circuit breaker；Low-power consumption coil current sensor is connect with socket, for incuding the phase current on circuit breaker internal circuit, and the high current on circuit breaker internal circuit is converted into low current, zero sequence current signal is generated in line fault, and low current signal or zero sequence current signal are output on the socket of breaker.Capacitive partial pressure sensor bulk built in the present apparatus is small, light-weight, precision is high, and low-power consumption coil current sensor is small, and loss is low, can reduce the Wen Sheng of device, and precision reaches 0.5S grades, and range is wide, more acurrate to path monitoring, high safety and reliability.

Description

A kind of 10kV pole-mounted circuit breakers

Technical field

The utility model is related to high-voltage circuitbreaker technical fields, and in particular to 10kV pole-mounted circuit breakers.

Background technology

High-voltage circuitbreaker plays control action in high-tension circuit, is one of the important electric elements in high-tension circuit.Open circuit Device is for being switched on or switched off circuit in normal operation, fault condition rapid disconnecting circuit under the action of protective relaying device, Short circuit current is reliably connected under special circumstances (when on such as automatic reclosing to faulty line), high-voltage circuitbreaker is in normal or event Be switched on or switched off the dedicated electric appliance of high-tension circuit in the case of barrier, in used 10kV overhead transmission lines, to line voltage on circuit and The scheme that the detection of the zero-sequence current and residual voltage that are generated when current phasor measurement and failure uses for：Electromagnetic type three-phase zero sequence Detection of the voltage transformer in line fault for the residual voltage of generation, electromagnetic type single-phase potential transformer are used for circuit The detection of line voltage, the electromagnetic current transducer detection phase current built in 10kV pole-mounted circuit breakers and zero-sequence current, 10kV columns Upper breaker disconnects faulty line.Device category is more needed for above-mentioned current scheme, and volume is big, and production cost is high, installation and after Phase safeguards cumbersome.The mating electromagnetic potential transformer secondary impedance very little of current scheme, once short circuit occurs for secondary side, electric current will Sharp increase and burn coil cause accident, in addition electromagnetic potential transformer generally existing core sataration resonance overvoltage ask Topic, easily causes resonance overvoltage accident on circuit；Electromagnetic current transducer generates high voltage there are second open circuit and damages instrument The risk of instruments and meters.

Utility model content

Based on the deficiencies of the prior art, the purpose of this utility model is to provide a kind of built-in condenser partial pressure sensor and In high precision, the 10kV pole-mounted circuit breakers of the low-power consumption coil current sensor of wide scope solve to reach the standard grade electricity to 10kV overhead transmission lines The accurate accurate detection for measuring and providing zero-sequence current and residual voltage and the accident analysis on circuit of pressure and phase current.

To achieve the above object, the technical solution of the utility model is：

A kind of 10kV pole-mounted circuit breakers, including case for circuit breaker, be arranged inside case for circuit breaker vacuum interrupter, into Line terminals, outlet terminal and operating mechanism, the first end of the left end connection 10kV high-tension lines of the input terminal, the inlet wire The moved end of the right end connection vacuum interrupter of terminal, the second end of the right end connection 10kV high-tension lines of the outlet terminal, institute State the static side of the left end connection vacuum interrupter of outlet terminal, it is characterised in that：Further include being arranged in the case for circuit breaker Capacitive partial pressure sensor and low-power consumption coil current sensor, the capacitive partial pressure sensor primary connection end with open circuit Device internal high pressure line connects, and the secondary connection end of the capacitive partial pressure sensor is connect with the socket on case for circuit breaker, institute Residual voltage of the capacitive partial pressure sensor for voltage and failure on circuit breaker internal circuit when is stated to be measured in real time, It will be in the small voltage signal of acquisition or residual voltage signal transmission to socket；The low-power consumption coil current sensor connects with socket It connects, low current is converted to for incuding the phase current on circuit breaker internal circuit, and by the high current on circuit breaker internal circuit, Zero sequence current signal is generated in line fault, and low current signal or zero sequence current signal are output to the socket of breaker On.

Further, 10kV pole-mounted circuit breakers further include the insulated tension pole being arranged in case for circuit breaker, and the insulation is drawn Bar one end connects the moved end of vacuum interrupter, other end attended operation mechanism, and drives vacuum to go out under the pulling of operating mechanism Complete the separating brake and combined floodgate of breaker in the moved end of arc chamber.

Further, the secondary connection end of the capacitive partial pressure sensor is connect by shielded cable with socket.

Further, the low-power consumption coil current sensor is connect by shielded cable with socket.

Further, the socket uses waterproof sealing aviation socket, the waterproof sealing aviation socket to pass through multiple twin screen It covers cable to connect with intelligent FTU, transmits the voltage and current information on monitoring circuit in real time.

Further, the iron core of the coil current sensor uses amorphous alloy iron core.

The beneficial effects of the utility model are：Capacitive partial pressure sensor bulk built in the present apparatus is small, light-weight, precision Height, and iron core is free of, it avoids since electromagnetic potential transformer core sataration leads to the problem of resonance overvoltage, this practicality Low-power consumption coil current sensor built in new device improves the work magnetic strength of iron core, reduces volume；Magnetic conductivity is high, rectifys Stupid power is low, reduces the excitation current of primary coil, meanwhile, loss it is low, the Wen Sheng of device can be reduced, precision up to 0.5S grades, Range is wide, more acurrate to path monitoring, security reliability higher.

Description of the drawings

Fig. 1 is the positive structure diagram of the utility model specific embodiment；

Fig. 2 is the side structure schematic view of the utility model specific embodiment.

Specific implementation mode

The technique effect of the design of the utility model, concrete structure and generation is carried out below with reference to embodiment and attached drawing It clearly and completely describes, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment It is a part of the embodiment of the utility model, rather than whole embodiments, those skilled in the art are not paying creative labor The other embodiment obtained under the premise of dynamic belongs to the range of the utility model protection.

As depicted in figs. 1 and 2, a kind of 10kV pole-mounted circuit breakers, including case for circuit breaker 1, setting are in case for circuit breaker The left end of vacuum interrupter 2, input terminal 3, outlet terminal 4 and the operating mechanism 5 in portion, the input terminal 3 connects 10kV high The first end on crimping road, the moved end of the right end connection vacuum interrupter 2 of the input terminal 3, the right end of the outlet terminal 4 connect The second end of 10kV high-tension lines, the static side of the left end connection vacuum interrupter 2 of the outlet terminal 4 are connect, vacuum interrupter 2 exists Rapid blow-out and electric current can be inhibited after high-tension line cut-out, prevent the key element of arcing, further include setting described disconnected The low-power consumption coil current sensor 7 (LPCT) of capacitive partial pressure sensor 6 and high-precision, wide scope in the device shell of road, institute It states 6 primary connection end of capacitive partial pressure sensor to connect with circuit breaker internal high-voltage line, the two of the capacitive partial pressure sensor 6 Secondary terminals are connect by shielded cable with the waterproof sealing aviation socket on case for circuit breaker, the capacitive partial pressure sensor 6 for voltage and failure on circuit breaker internal circuit when residual voltage be measured in real time, the small voltage of acquisition is believed Number or residual voltage signal transmission to waterproof sealing aviation socket on；Low-power consumption coil current sensor 7 (LPCT) and anti-watertight Iceound dummy receptacle connection, for incuding the phase current on circuit breaker internal circuit, and by the high current on circuit breaker internal circuit Low current is converted to, zero sequence current signal is generated in line fault, and low current signal or zero sequence current signal are output to On the waterproof sealing aviation socket of breaker.Waterproof sealing aviation socket is connected by paired shield cable and intelligent FTU It connects, transmits the voltage and current information on monitoring circuit in real time, do further breakdown judge.

Capacitive partial pressure sensor 6 is by the electronic type voltage mutual inductance to being used on 110kV and the above power transmission and transformation line The novel voltage sensor that a kind of set electron technology and materialogy technology after device miniaturization are integrated, has small, weight Gently, the features such as precision is high, and reliability is high, can be integrated in inside 10kV pole-mounted circuit breakers, further be set to the optimization of internal structure Meter can effectively eliminate inside 10kV pole-mounted circuit breakers the stray resistance caused by compact-sized and kindred effect for precision Influence, precision is up to 0.5 grade after being opposite to the Optimal Structure Designing under complex electromagnetic environment, and the linearity is good.Due to capacitance Formula partial pressure sensor principle is free of iron core for capacitance-voltage-distributing type non electromagnetic induction formula, therefore is not in electromagnetic potential mutual inductance Device core sataration leads to the problem of resonance overvoltage.

Compared with the silicon sheet core material used in the electromagnetic current transducer of traditional circuit of monitoring in real time, in the present apparatus The low-power consumption coil current sensor 7 set does core material using non-crystaline amorphous metal, is designed according to high-impedance resistors, improves iron core Work magnetic strength, reduce volume；Magnetic conductivity high-coercive force is low, reduces the excitation current of primary coil；It is lost low, can reduce The Wen Sheng of device, for precision up to 0.5S grades, range is wide, more acurrate to path monitoring, security reliability higher.

10kV pole-mounted circuit breakers further include the insulated tension pole 8 being arranged in case for circuit breaker, and 8 one end of the insulated tension pole connects The moved end of vacuum interrupter 2, other end attended operation mechanism 5 are met, and drives vacuum interrupter 2 under the pulling of operating mechanism 5 Moved end complete breaker separating brake and combined floodgate.

It is the preferred embodiment of the utility model it should be noted that described above, the utility model not office It is limited to the above embodiment, as long as it reaches the technique effect of the utility model with identical means, it is new should all belongs to this practicality The protection domain of type.

Claims (6)

1. a kind of 10kV pole-mounted circuit breakers, including case for circuit breaker, the vacuum interrupter being arranged inside case for circuit breaker, inlet wire Terminal, outlet terminal and operating mechanism, the first end of the left end connection 10kV high-tension lines of the input terminal, the end of incoming cables The moved end of the right end connection vacuum interrupter of son, the second end of the right end connection 10kV high-tension lines of the outlet terminal are described The static side of the left end connection vacuum interrupter of outlet terminal, it is characterised in that：Further include being arranged in the case for circuit breaker Capacitive partial pressure sensor and low-power consumption coil current sensor, the capacitive partial pressure sensor primary connection end and breaker Internal high pressure line connects, and the secondary connection end of the capacitive partial pressure sensor is connect with the socket on case for circuit breaker, described Residual voltage when capacitive partial pressure sensor is used for voltage and failure on circuit breaker internal circuit is measured in real time, will On the small voltage signal or residual voltage signal transmission to socket of acquisition；The low-power consumption coil current sensor connects with socket It connects, low current is converted to for incuding the phase current on circuit breaker internal circuit, and by the high current on circuit breaker internal circuit, Zero sequence current signal is generated in line fault, and low current signal or zero sequence current signal are output to the socket of breaker On.

2. 10kV pole-mounted circuit breakers as described in claim 1, it is characterised in that：Further include be arranged in case for circuit breaker it is exhausted Edge pull rod, the moved end of insulated tension pole one end connection vacuum interrupter, other end attended operation mechanism, and in operating mechanism Pull the lower separating brake and combined floodgate for driving the moved end of vacuum interrupter to complete breaker.

3. 10kV pole-mounted circuit breakers as described in claim 1, it is characterised in that：The secondary of capacitive partial pressure sensor connects Line end is connect by shielded cable with socket.

4. 10kV pole-mounted circuit breakers as described in claim 1, it is characterised in that：The low-power consumption coil current sensor passes through Shielded cable is connect with socket.

5. the 10kV pole-mounted circuit breakers as described in claim 1,3 or 4, it is characterised in that：The socket is navigated using waterproof sealing Dummy receptacle, the waterproof sealing aviation socket are connect by paired shield cable with intelligent FTU, and monitoring line in real time is transmitted The voltage and current information of road.

6. 10kV pole-mounted circuit breakers as described in claim 1 or 4, it is characterised in that：The low-power consumption coil current sensor Iron core use amorphous alloy iron core.