Self-generated circuit breakers, VNA series


    To any region of Russia and CIS

    General information:

    Self-generated circuit breaker VNA-ED-10/630-20 U3 is designed for switching under loads of three-phase current circuits of 630 A, frequency 50 Hz, with a nominal voltage of 6 or 10 kV.


    VNA is used in cabinets of package switchgear (KRU), indoor package transformer substations (KTP) and stationary switchgears of unilateral maintenance (KSO).
    VNA operating conditions:
    - altitude above sea level shall be up to 1000 m;
    - range of ambient air temperatures shall be from -40°C to + 40°C;
    - environment shall be non-explosive, not containing conductive dust, corrosive gases and vapors, which destroy metals and insulation;
    - climatic version according to GOST 15150 U3. Additional information available at:


    • Rated voltage - 10kV
    • Highest operating voltage: 12 kV
    • Rated current: 630 A
    • Rated breaking current for cos φ 0,7: 630 А
    • Current of electrodynamic stability: 51 kA
    • Rated initial value of periodic component: 20kA
    • Mechanical life before overhaul, at least, I/O: 2000 cycles
    • Switching capacity in normal operation mode, at least: 10 I/O cycles
    • After performing the operations, the circuit breaker is tested with the replacement of arc chutes (GOST 17717-79).

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