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  • Xiamen Huadian Switchgear Co.,Ltd

    Power distribution system

    VEP-12

    Originated in Germany, VEP-12 indoor medium-voltage enclosed vacuum circuit breaker is the first complete series of medium-voltage enclosed vacuum breaker around the globe jointly developed by R&D team under the leadership of senior vacuum breaker experts of China and Germany.  To meet the demand of grid and industrial mine enterprise users for automatic operation and condition overhaul of the breaker, Xiamen Huadian has separately developed VEP motor-operated breaker and VEP intelligent breaker based on VEP medium-voltage vacuum breaker, which have been put into domestic and overseas market; they improve automatic level of the breaker and realize condition overhaul, thus largely reducing breaker maintenance work for users and saving maintenance cost.

    Conventional type: VEP-12

    ■ VEP-12 circuit breaker is the third generation of indoor medium-voltage enclosed vacuum circuit breaker with the most complete series of product specification in the world at present.

    ■ Enclosed electrode pole of VEP-12 circuit breaker seals vacuum arc extinguish chamber of ultra low resistance and dominant electric parts of primary circuit in epoxy resin, suitable for hostile work environment.

    ■ Application of buffer layer in enclosed electrode pole of VEP-12 circuit breaker assures its operation reliability in all kinds of operating environment.

    ■ Solid insulation of enclosed electrode pole of VEP-12 circuit breaker substitutes requirement of SF6 as external insulation to a certain extent, more environment friendly.

    ■ Application of vacuum arc extinguish chamber of ultra low resistance in VEP-12 circuit breaker fundamentally satisfies the demand of large current VEP-12 for temperature rise and reduces the loss of electric energy.

    ■ Adoption of modular spring actuating mechanism in VEP-12 circuit breaker renders high reliability and convenient maintenance.

    Motor-operated type: VEP-24-M

    ■ Remote control of motor-operated chassis vehicle through SCADA system of substation, automatic roll-in-and-out of circuit breaker and unattended substation are realized in VEP-12 circuit breaker.   

    Intelligent type: VEP-12-I

    ■VEP-12 circuit breaker is equipped with coil current sensor, available for online monitoring on wave form of closing and opening coil in circuit breaker

    ■VEP-12 circuit breaker is equipped with motor circuit current sensor, available for online monitoring on wave form of circuit current of energy-stored motor and motor-operated chassis vehicle in circuit breaker 

    ■VEP-12 circuit breaker is equipped with operation circuit voltage sensor, available for online monitoring on operation voltage value of operation circuit in circuit breaker

    ■VEP-12 circuit breaker is equipped with angular displacement sensor, available for online monitoring on position-time behavior of closing and opening circuit breaker

    ■VEP-12 circuit breaker is equipped with spring tension sensor, available for online monitoring on spring tension property of closing circuit breaker

    Item

    Unit

    Data

    Rated voltage 

    kV

    3.6/7.2/12

    Rated frequency

    Hz

    50

    Rated power frequency withstand voltage (1min)

    kV

    42

    Rated lightning surge withstand voltage (peak value)

    kV

    75

    Rated current

    A

    630

    1250

    630

    1250

    1600

    2000

    2500

    3150

    630

    1250

    1600

    2000

    2500

    3150

    4000*

     

    1250

    1600

    2000

    2500

    3150

    4000*

     

    1250

    1600

    2000

    2500

    3150

    4000*

    Rated short-circuit breaking current

    kA

    20

    25

    31.5

    40

    50

    Rated short time withstand current (4s)

    kA

    20

    25

    31.5

    40

    50

    Rated short-circuit making current (peak value)

    kA

    50

    63

    80

    125

    150

    Rated peak withstand current (peak value)

    kA

    50

    63

    80

    125

    150

    Opening times of rated short circuit current

    Times

    50 (40kA and below)

    30 (50kA)

    Rated operation order, automatic reclosing

     

    O-0.3s-CO-15s-CO (40kA and below)

    O-0.3s-CO-180s-CO (40kA and below)

    Rated operation order, non-automatic reclosing

    O-180s-CO-180s-CO (50kA)

    Rated operating voltage

    V

    AC220/110  DC220/110

    Mechanical life

    Times

    30,000 (31.5kA and below)

    20,000 (40kA and above)

    Rated voltage of motor-operated chassis vehicle motor

    V

    DC220/110, AC220/110

    Note: * When rated current is4000A, forced air cooling is required.

    *All technical parameters are data from type tests, rather than theoretical calculation.

    Motor-operated chassis vehicle of circuit breaker can be selected according to specific engineering requirements.

    Sensor type can be selected according to requirements for online condition monitoring on circuit breaker. 

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