126kv HV SF6 gas outdoor circuit breaker

General:

Simple structure, small size, long period of no maintenance, can completely replace the same type of imported products in the current process of power equipment becoming oil-free and large-capacity.

Service Environment

• Ambient temperature :-40 ° C ~+40° C;

• Altitude: no more than 3000m;

• Wind speed: not more than 34m/s;

• Daily temperature difference: not more than 25°C;

• Sunshine intensity: not more than 0.1w/cm2;

• Monthly average relative humidity: not more than 90%;

• Seismic acceleration: horizontal is not more than 0.2g, vertical is not more than 0.1g;

• Ice thickness: no more than 10mm;

• Air pollution degree: not more than GB5582 level IV;

• Installation occasion: outdoor.

Key Feature

• Circuit breaker adopts three-phase porcelain bottle pillar structure, outdoor design, three-phase with an SRCT36-C spring operating mechanism, centered arrangement, three-phase continuous movement, so the appearance is novel and exquisite.

• The circuit breaker uses SF6 gas as insulation and arc extinguishing medium, and the three SF6 gas poles of the circuit breaker should be connected during operation, and the pressure and density of the circuit breaker should be monitored by a pointer density relay.

• The principle of self-energy arc extinguishing is adopted, and the optimal design is carried out in the circuit breaker motion system, so the mechanical efficiency is effectively improved.

Technical Data

• Name		Unit	Data
  Rated voltage		kV	126
  Rated power frequency withstand voltage (1mim)	to earth	kV	K.230
  	Between open contacts		K.（230+70）
  Rated lightning impulse withstand voltage	to earth	kV	K.550
  	Between open contacts		K.（550+103）
  Power frequency withstand voltage at zero gauge pressure of SF6 gas		kV	K.95
  Rated frequency		Hz	50
  Rated current		A	3150
  first open pole coefficient			1.5
  Rated short-circuit breaking current			40
  Rated short-circuit making current (peak value)		kA	100
  Rated short-time withstand current		kA	40
  Rated peak withstand current		kA	100
  Rated short circuit duration		S	4
  Rated out-of-step breaking current		kA	10
  Near zone fault breaking current		kA	90%lk, 75%lk
  Rated line charging switching current		A	31.5
  Nominal Operation Sequence			0-0.3s-CO-180s-CO
  Main circuit resistance		μΩ	≤35

Drawing