Name: LW36-55 Outdoor high voltage AC SF6 circuit breaker
Brand: MY SHOP

Description

Introduction
The Model LW36-55/3150-31.5 is a novel, outdoor, two-phase, self-energy AC high-voltage SF6 circuit breaker designed specifically for railway electrification applications. It is suitable for use in AC 50Hz power grids with a nominal system voltage of 55 kV, located in regions with an altitude not exceeding 2,000 meters, an ambient temperature not lower than -30°C, and a pollution level not exceeding Class IV. It serves to interrupt rated currents and fault currents, or to switch lines, thereby facilitating the control and protection of the power system. It may also be utilized as a tie circuit breaker.

Characteristic of structure
The circuit breaker adopts a sealed SF6 gas insulation structure with strong arc-extinguishing capability and high dielectric strength. Its robust outdoor design ensures excellent resistance to environmental factors such as moisture, dust, and temperature variations. The compact and durable construction allows for easy installation, reliable operation, and low maintenance.

Applications
1.Outdoor Substations
2.Medium-Voltage Transmission & Distribution Systems
3.Power Grid & Utility Projects
4.Industrial Power Systems

Technical data

No.	Name		Unit	Value
1	Rated voltage			55
2	Rated power frequency withstand voltage(1min)	To earth	kV	K·140
		Between interrupter		K·140
3	Rated thunder impulse withstand voltage	To earth		K·325
		Between interrupter		K·325
4	SF6 gas zero table pressure power frequency voltage tolerance (5 min)			K.84

5	Rated frequency		HZ	50
6	Rated current		A	3150
7	First open class coefficient			1.5
8	Rated short open circuit current			31.5
9	Rated short circuit close current (peak)		kA	80
10	Rated short circuit current tolerance			31.5
11	Rated current peak tolerance			80
12	Rated short circuit duration		s	4
13	Rated out-of-step open circuit current		kA	8
14	Area near fault open circuit current		kA	90%k,70%lk
15	Rated line open charging electric current		A	10
16	Rated operating order			O-0.3s-CO-180s-CO
17	The main loop resistance		μΩ	≤40
18	Rated six fuoride sulfur gases pressure (20°C table press)		Mpa	0.5
19	The police, the lowest pressure function[20°C table press)		Mpa	0.35 ±0.03/0.30±0.03
20	SF6 gas leakage rate in			<0.5%
21	Gas water content (V/V)			≤150x 10-6
22	Mechanical life		Times	10000
23	Radio interference level		μV	≤500
24	Creepage distance	Between interrupter	mm	>1800
		To earth		>1800
25	Weight of the Sf6		kg	8
26	Weight of the circuit breaker		kg	1000/2000

Main technical data of structure

No.	Name		Unit	Value
1	Auxiliary circuit voltage		V	DC220 or DC110
2	Points off coil voltage/current		V/A	DC110/4;DC220/2
3	Energy storage motor	Rated voltage	V	DC220, AC220/DC110, AC110
		Normal operating voltage range	V	85%~110%
		Power	W	600
4	Motor energy storage time		S	≤15
5	Heater and lighting circuit voltage		V	AC220
6	Auxiliary switch the rated voltage		V	DC220、AC220
7	Auxiliary switch rated current		A	10
8	Auxiliary switch pick up points			10 normally open 10 NC
8	Auxiliary switch pick up points			10 normally open 10 NC

Mechnical adjustment of the breaker

No.	Name	Unit	Value
1	Breaker pole center distance	mm	1500
2	Moving contact stroke	mm	120
3	Moving contact contact trip	mm	25
4	Circuit breakers and white operating rod travel (chord length)	mm	110
5	Opening speed	m/s	4.2-5m/s
6	Closing speed	m/s	2.2-3m/s
7	Opening time	ms	≤40
8	Closing time	ms	≤100
9	Breaking time	ms	≤60
10	Together -sub time	ms	≤80
11	Minutes-time together	ms	300
12	Three-phase sub-gate-term	ms	≤2
13	Three-phase switch on a different period	ms	≤3