ZN12-12 Series Integrated Column Switch Vacuum Circuit Breaker

ZN12-12 Series Integrated Column Switch Vacuum Circuit Breaker

 

• Specification
• Drawings

• ZN12-12 Series Integrated Column Switch Vacuum Circuit Breaker

  ZN12 series vacuum circuit breakers are indoor high-voltage switchgear device with rated voltages of 12kV, 24kV, and 40.5kV, and three-phase AC 50Hz.
  The operating mechanism of the circuit breaker is a spring energy storage type, which can be operated by AC or DC, or manually. The circuit breaker has simple structure, strong breaking capacity, long service life and complete operation functions. And there is no danger of explosion, and the maintenance is simple. It is suitable for the control or protection switch of power transmission and distribution systems such as power plants, substations and industrial and mining enterprises, especially suitable for breaking important loads and frequent operation places. The installation form of the circuit breaker in the switch cabinet can be either a fixed type or a handcart type.
  This product complies with relevant standards such as GB1984, JB3855 and IEC62271-100 “High Voltage AC Circuit Breaker”.

   

  Environmental conditions
  1. Altitude:≤1000 m; (Altitude of prototype can reach below 4000 meters)
  2. Ambient temperature: highest +40°C, lowest -25°C;
  3. Relative humidity: daily average not more than 95%, monthly average not more than 90%;
  4. Earthquake intensity: less than 8;
  5. Installation environment: no fire, explosion hazard, no corrosive gas and no violent vibration place.
  6. Please contact the manufacturer if the usage environment exceeds the above.

  Technical parameters
  12kV circuit breaker electrical parameters (see Table 1)

  Item		Unit	Data
  Rated voltage		KV	12
  Rated insulation level	Short-time power frequency withstand voltage (1min)	KV	42
  	Lightning impulse withstand voltage (peak)	KV	75
  Rated frequency		Hz	50
  Rated current		A	630 1250		1250 1600 2000 2500 3150	1250 1600 2000 2500 3150 4000
  Rated short-circuit breaking current (effective value)		KA	20	25	31.5	40	50
  Rated short-circuit withstand current		KA	20	25	31.5	40	50
  Rated short circuit duration		s	4
  Rated peak withstand current		KA	50	63	80	100	125
  Rated short-circuit making current		KA	50	63	80	100	125
  Rated short-circuit breaking times		times	50			30	20
  Secondary circuit power frequency withstand voltage (1min)		V	2000
  Rated single capacitor bank breaking current		A	630			800	800
  Rated back-to-back capacitor bank breaking current		A	400

• ZN12-12 Series Integrated Column Switch Vacuum Circuit Breaker

  

  

 

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