LW36-126(145) Outdoor Self-energy Type Circuit Breaker

Description

The LW36-126(145) Outdoor Self-Energy Type Circuit Breaker uses sulfur hexafluoride (SF6) gas as both the insulating and arc-extinguishing medium. It is equipped with a CT30 spring operating mechanism and operates based on the principle of self-blown arc extinction with a single-variable pressure distance.

This circuit breaker is designed for use in 72.5kV (126kV) three-phase AC 50Hz power systems. It is primarily used for disconnecting and connecting load currents, overload currents, and short-circuit currents.

Environment Condition
- Ambient temperature:-40℃~+40℃
- Altitude:≤2000m
- Wind pressure:≤700Pa
- Daily temperature differenc:25℃
- Icing thickness:≤10mm
- Pollution degree: III(25mm/kV).

Technical Data

Rated voltage			kV	126 (145)
Rated current			A	1250, 2000
Rated frequency			HZ	50
First pole to clear factor				1.5
Rated short circuit breaking current			kA	40
Rated short-circuit current (peak)			kA	100
Rated short-circuit withstand current			kA	40
Rated power frequency withstand voltage (1min)		Phase to earth	kV	K·230
		Phase to phase		K·(230+70)
Rated lightning impulse withstand voltage		Phase to earth	kV	K·550
		Phase to phase		K·(550+103)
Rated peak withstand current			kA	100
Rated out of step current			kA	10
Near fault current			kA	90%1K
Electrical life of rated short circuit breaking current			times	20
Rated short circuit duration			s	4
Rated line charging close current			A	31.5
Rated operation sequence				O-0.3s-CO-180s-CO35
Main circuit resistance			μΩ	≤35
Rated SF6 gas pressure			MPa	0.6
SF6 gas leakage rate			ppm	≤0.55
Moisture content of SF6 gas (V/V)				≤150
Mechanical life			Times	10000
Electric distance	Phase to earth		mm	3906/3150
	Phase to phase			3906/3150
Each filled with SF6 gas quality			KG	8
Quality of each circuit breaker			KG	1700

Order instruction
1-The type and the specification of the circuit breaker.
2-Rated electrical parameter(voltage, current, rated short-circuit breaking current and so on).
3-Environmental condition(temperature, altitude, filth level and so on).
4-Rated electric parameter of control loop(rated voltage of energy storage of the opening and closing coils).
5-The name and the direction of the primary upper Terminal.

Outline & Mounting Dimensions

LW36-126(145) Outdoor Self-energy Type Circuit Breaker