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      1. Hello! welcomeZhejiang Xikai Electric Co. , Ltd.
        Zhejiang Xikai Electric Co. , Ltd.
        Contact
        Zhejiang Xikai Electric Co. , Ltd.
        Mailbox:wzxikai@wzxikai.com
        Tel:+86 577 61666 016
        address:No.271, Weishiqi Road, Yueqing Economic Development Insuatrial Zone, Yueqing, Zhejiang.

        product list

        Indoor high voltage load switch
        14/5000 Indoor vacuum circuit breaker
        Outdoor vacuum circuit breaker
        Outdoor high voltage load switch
        Outdoor high voltage disconnector
        Outdoor drop fuse
        High voltage current limiting fuse series
        High voltage complete set
        current position:Home>Product Center

        Product Center

          • FN12 Series Indoor Load Break Switch

          FN12 Series Indoor Load Break Switch

          The switch disconnectors series FN12 are increasingly adopted in MV installations, owing to their superior interrupting features and to their capability to withstand the short-circuit currents which occur mainly as consequences of faults in distribution networks. The versions combined with HRC fuses are particularly suitable for the protection of distribution transformers up to 1250 kVA The use of FN12, designed for installation in compartmented switchboards have the following advantages: -Full segregation between the busbar compartment and the cable compartment, with switch disconnector in both "closed" and "open" position. -The moving contact, of the sliding vertical type, can be easily checked and cleaned with live bus-bars and earthing switch (ES) closed. -No adjustment is needed in the tripping mechanism of the switch fuse combination and of the ES: they are built together in a single unit, which is adjusted and checked during assembly in the factory, before the final test.

          Technical Information

          Technical Specification

           

           

           

           

          Rated voltage

          kV

          12

          24

          36

          Rated current

          A

          630

          630

          630

          Rated power frequency

          Hz

          50/60

          50/60

          50/60

          Short circuit making capacity

          kA Peak.

          67

          50

          50

          Peak withstand current

          kA Peak.

          82

          82

          66

          Short time current

          kA eff.

           

           

           

          1Sec.

           

          31.5

          31.5

           

          2Sec.

           

          25

          25

          25

          3Sec.

           

          20

          16

           

          Max. breaking capacity in co-operation with fuses IEC 62271-105(IEC 420 1990-11)

          A

          1600

          900

          300

          Max. fuse current(XRNT Fuse)

          A

          125

          80

          40

          Power frequency withstand voltage 50Hz 1 min,:

           

           

           

           

          - To earth and between poles

          kV

          42

          55

          95

          - Across isolating distance

          kV

          45

          70

          120

          Impulse withstand voltage 1.2/50μ s:

           

           

           

           

          - To earth and between poles

          kV

          75

          125

          190

          - Across isolating distance

          kV

          85

          145

          220

          Mechanism Endurance

          cycles

          2000

          2000

          2000


          Overall and installation dimensions


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