SF6 circuit breaker HV 40.5KV

General:

Live tank SF6AC HV SF6 breaker is kind of 3 phase AC 50HZ outdoor type breakers. The current transformers inside are used for measuring and protecting the breaker. The breaker is the regenerate type of oil type breaker.

Service Environment

• Altitude :≤3000m.

• Ambient temperature :-30℃~+40℃.

• Pollution grade: Class II, Class III, Class IV.

• Relative humidity: the daily average is not more than 95%, the monthly average is not more than 90%(25℃).

• Wind pressure: not more than 700Pa(equivalent to 34m/s).

• There are no inflammable substances, explosion hazards, chemical corrosion and violent vibration.

Key Feature

• The product has excellent breaking performance, adopts pressure type arc extinguishing chamber, short arc time, long electrical life, and continuously breaks 31.5kA short circuit current up to 21 times without maintenance and without replacing sulfur hexafluoride gas; High mechanical reliability.

• Mechanical life of more than 3000 times; Can be frequently operated, each set can be installed 12 current transformers, for users to choose. The product uses a new MKZ type SF6 pointer density meter, the pressure gauge reading is not affected by temperature changes, easy to use.

• The circuit breaker meets the requirements of the national standard GB1984-89 "AC high Voltage Circuit breaker" and the International Electrotechnical Commission standard IEC56 publication "High voltage AC Circuit breaker". The product is equipped with CT14 spring mechanism.

Technical Data

• Name		Unit	Data
  Rated voltage		KV	40.5
  Rated insulation level	Withstand voltage of 1min power frequency	KV	95
  	Lightning shock resistance (peak)
  Rated current		A	185
  Mechanical life		Times	1600/2000
  Rated pressure of SF6 (gauge pressure at 20C)		Mpa	3000
  Locking pressure (gauge pressure at 20℃)		Mpa	0.45
  Minimum operating temperature		℃	0.42
  Rated short circuit breaking current		KA	-30
  Rated short circuit shut-off current (peak)		KA	20/25/31.5
  Rated withstand current in short circuit (heat stable current)		KA	63/80
  Rated peak withstand current (dynamic stable current)		KA	35/31.5/100
  Rated out-of-step breaking current		KA	63/80/100
  Rated short circuit duration		S	4
  Closing time (at rated operating voltage)		S	≤0.1
  Switching time (at rated operating voltage)		S	≤0.07
  Rated operating sequence			0-0.3-C0-180S-CO
  Rated open and close current of a single capacitor bank		A	400
  Weight of SF6 gas		Kg	8/5
  Weight of circuit breaker (including operating mechanism)		Kg	14000/1000

Drawing