12/15kv HV AC isolation switch outdoor

General:

Outdoor high voltage AC isolation switch (hereinafter simply "isolation switch"), is a single-phase hook rod operated isolation switch, the knife has a self-locking device. The isolation switch is suitable for the isolation of 12kV and 15kV overhead lines, opening and closing operation under no load, widely used with circuit breakers or load switches and provide safe visible breaks for the line.

Service Environment

• Altitude: no more than 1000m. If the altitude is higher than 1000m, the rated insulation level shall be corrected accordingly.

• Ambient temperature: upper limit + 45 0C, lower limit - 40 0C, average temperature of the hottest month 30 0C, maximum daily temperature difference 25K.

• Solar radiation intensity (outdoor): 0.1W/cm2

• Wind speed / pressure (outdoor): 34m/s  /  700Pa

• Pollution level: e-level

• Icing thickness: not more than 20mm

• Humidity: average daily relative humidity, not more than 95%, average monthly relative humidity not more than 80%

• Earthquake resistance: horizontal acceleration 0.3m/2, vertical acceleration 0.15m/s2

• Safety factor: sinusoidal resonance three cycle wave, safety factor above 1.67

Technical Data

• Name		Unit	Data
  Rated frequency		Hz	50
  Rated voltage		kV	12
  Rated current		A	630（1250）
  Rated short-time withstand current and duration		kA/s	20（25）/4
  Rated peak withstand current		kA	50（63）
  Rated short-time power frequency withstand voltage	Phase to phase,to earth(dry)	kV/min	42/1
  	Open contact(dry)		48/1
  	Phase to phase,to earth(wet)		30/1
  	Open contact(wet)		36/1
  Rated lightning impulse withstand voltage	Phase to phase,to earth	kV	75
  	Open contact		85
  Loop resistance		μΩ	≤80
  Mechanical life		Times	3000
  Pollution grade			e Grade
  creep age distance		mm	≥372

Drawing