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ZW20 Three-Phases 12kw Outdoor low voltage Vacuum Circuit Breaker ratings

Categories Outdoor Vacuum Circuit Breaker
Place of Origin: Zhejiang
Brand Name: ELECS
Certification: CE, QS, CCC
Model Number: ZW20-12
MOQ: 1 Set/Sets
Packaging Details: Standard Packaging
Delivery Time: 30 Days
Payment Terms: L/C,T/T,Western Union,MoneyGram,Paypal Escrow
Supply Ability: 2000pcs/year
Price: Negotiable
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    ZW20 Three-Phases 12kw Outdoor low voltage Vacuum Circuit Breaker ratings

    ZW20 Three-Phases 12kw Outdoor low voltage Vacuum Circuit Breaker ratings

    echnical Parameter

    No

    Item

    Unit

    Data

    1

    Rated voltage

    kv

    12

    2

    Rated frequency

    Hz

    50

    3

    Rated current

    A

    630

    4

    Rated peak value withstand current

    kA

    50

    5

    Rated time withstand current/4s

    kA

    20

    6

    Rated short circuit breaking current

    kA

    20

    7

    Rated short circuit current making cycles(peak value)

    times

    50

    8

    Rated operate sequence

     

    O-0.3s-CO-180s-O

    9

    Lightning impulse withstand voltage

    kv

    75/85

    10

    Secondary circuit 1min frequency withstand voltage

    V

    95/80

    11

    Mechanical life

    times

    10000

    12

    1min power frequency withstand voltage

    (wet)Phase-to-phase phase-to-earth

    kv

    34/35

    (dry) Phase-to-phase phase-to-earth

    kv

    42/49

    13

    SF6 gas pressure

    Mpa

    0

    Summary

    ZW20 series circuit breaker use three-phase non-segregated structure and has the features of stable and reliable breaking performance, no combustion and explosion danger, maintenance-free, light weight (two-thirds of similar products ), high cycle life (mechanical operating life is 10000 times) and so on. New designed spring operating mechanism is exposed in SF6 to effectively avoid traditional spring operation mechanism’s design defects, such as stagnation and rustiness, making a significant improvement in reliability.


    Scope of Application

    ZW20 series circuit breaker is mainly used to break and close load current, overload current and short-circuit current in the electric power system. It is used to protect and control the power distribution system in transformer substation, industrial and mining enterprises, and it is especially suitable for the transformation of the power network in rural and city. This circuit breaker can be used with FTU/dividing switch controller, so as to automatically detect, isolate and alarm the faults in main line’s section and branch, and monitor line operation. And it has the function of automatically recovering power supply in the fault segment. After adding measure and protection, control and communication functional module to the switch, it can satisfy the requirement of power distributing automation.


    The Main Features Of This Product

    1. Vacuum arc technology

    The vacuum tube that ZW20 series circuit breaker uses is made by the technology of three-phase non-segregated longitudinal magnetic field vacuum quenching of arc, which is one of the most advanced open circuit device. Long-term field operation experience proves that the vacuum tube which uses this technology has the features of long life and high reliability. With this technology the spiral groove structure on the active and static contactor makes the current that goes through the contact produces longitudinal rotating magnetic field, which can accelerate the diffusion of ionizing particle and reduce arc energy. And then the shielding case of special alloys will rapidly absorb energy of diffused arc. This process makes the vacuum tube own the advantages of small heat value, short arc time, long life etc.

    2. Silicon rubber/solid epoxy resin bushing

    ZW20 series circuit breaker adopts imported outdoor special materials, silicon rubber and epoxy resin, and adopts advanced APG vacuum casting technology and the newest various testing means in order to ensure the quality of the products. Experiment and 20 years’ outdoor operation experience shows that silicon rubber and epoxy resin solid insulation materials have no surface carbonization and corrosion in corona and controllable arc discharge cases, which makes the performance of the circuit breaker has great improve under the condition of ultraviolet ray, humidity, high salinity and other corrosion factors.

    3. The technology of SF6 insulation

    ZW20 series circuit breaker uses SF6 on ompa as insulating medium. The good insulation of SF6 can effectively prevent the product have the accidents because of internal condensation. And meanwhile, the design in the circuit breaker can make SF6 in in the air insulation to meet the needs of the industrial frequency compression, alternate with 42kv, fracture 48kv level, and ensure the safety operation of the product.


    4. Explosion and pressure relieving device

    The top-cover of the case of ZW20 series circuit breaker is designed as high-pressure relieving channel. When the pressure of SF6 sharply increases because of some abnormal reason in the case, the top-cover will rapidly bound up to relieve high pressure, which can avoid endangering of operators and public safety.

    5. Spring operation mechanism

    ZW20 series circuit breaker uses simple and reliable spring operation mechanism, which making the circuit breaker has small size and light weight. This mechanism use imported spring wire to keep enough spring force under the long-time running state; the rotational part uses bearing structure and surface treatment method with Zinc, Nickel and Cobalt alloy to ensure that the product can stay in a long-time stable and reliable operating state in harsh environment.

    Quality ZW20 Three-Phases 12kw Outdoor low voltage Vacuum Circuit Breaker ratings for sale
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