Name: LW8(A)-40.5 Outdoor high voltage AC SF6 circuit breaker
Brand: MY SHOP

Description

Description
The Model LW8A-40.5(w)/T2000-31.5 outdoor SF6 circuit breaker is an electrical device designed for 50 Hz, three-phase AC power systems. It is suitable for use in power systems with a rated voltage of 40.5 kV for control and protection purposes; it can be equipped with either internal or external current transformers to facilitate measurement and protection functions.

Characteristic of structure
The LW8-40.5 type SF6 circuit breaker features an outdoor, porcelain-pillar-supported structure. It is equipped with a CT35 spring operating mechanism, arranged in an "L" configuration relative to the main body. The complete unit is characterized by its compact size, light weight, simple structure, low operating energy requirements, and ease of installation and commissioning. It boasts a mechanical life of 10,000 operations, making it suitable for frequent switching applications.
The unit employs a puffer-type arc-extinguishing chamber, delivering excellent interrupting performance. Its electrical life reaches 20 operations. The sealing performance is highly reliable; static seals utilize an "O-ring" structure, while dynamic seals employ a "V-ring" structure with spring-assisted pressure compensation. The secondary terminal board for the current transformers is manufactured using a pressure-injection molding process, offering strong resistance to aging and ensuring an annual gas leakage rate of no more than 0.5%.
The mounting base frame and support structure are fabricated from integrally rolled steel plates; utilizing high-strength standard fasteners, the unit achieves a high level of mechanical reliability.

Application
1.Power Transmission & Distribution Systems
2.Industrial Power Networks
3.Urban & Rural Grid Infrastructure
4.Renewable Energy Systems

Technical data

No.	Name		Value
1	Rated voltage(kV)		40.5
2	Rated Current (A)		1600/2000
3	Rated insulating level	Power trequency withstand voltage(kV)/1min	95
		thunder impulse withstand voltage(kv)	185
4	Rated short-circuit breaking current (kA)		25/31.5
5	Rated phase breaking current (kA)		27.4/34.8
6	Different phase to ground fault breaking current (kA)		7.9/10
7	Rated single capacitor bank breaking current (kA)		27.4/34.8
8	Rated operating sequence		400
9	SF6 gas rated voltage (Mpa)		O-0.3S-CO-180S-CO
10	Opening time ms (nominal voltage)		0.5
11	Closing time ms (nominal voltage)		30≤t≤40
12	Rated short-circuit current (peak)(kA)		60≤t≤80
13	Rated short-circuit duration(S)		63/80
14	Rated short time withstand current (kA)		4
15	Rated peak withstand current (kA)		25/31.5
16	Mechanicallife test (s)		63/80
17	Rated short-circuit breaking current 31.5kA/40kA cumulative breaking times (times)		10000
			20
18	Rated current cumulative breaking times (times)		2000
19	SF6 gas leakage rate(%)		≤0.5
20	SF6gas trace moisture content (V/V)		≤150
21	Circuit breaker outside the insulation leakage distance (mm/kV)		≥25、≥31
22	Breaker Weight(kg)		1000