LW30 SF6 Gas Dead Tank Circuit Breaker (72.5 - 220 kV)

The LW30 SF6 Gas Dead Tank Circuit Breaker is designed for 72.5 kV, 126 kV, 145 kV, and 220 kV transmission and substation applications. Using SF6 gas as the insulating and arc-quenching medium, it provides reliable interruption of load current, fault current, and short-circuit current under demanding operating conditions.

Featuring a compact dead tank structure and a self-energy operating mechanism, the LW30 delivers stable switching performance, high mechanical reliability, and reduced maintenance requirements throughout its service life. It is suitable for utility substations, industrial power systems, renewable energy projects, and transmission networks where dependable high-voltage protection is essential.

Available for 72.5 kV, 126 kV, 145 kV, and 220 kV power systems 
SF6 gas insulation for excellent dielectric strength and arc interruption 
Compact dead tank design for outdoor substations 
Self-energy operating mechanism with high operating reliability 
Rated current up to 4000 A 
Short-circuit breaking current up to 63 kA 
Operating temperature from -50°C to +50°C 
Low annual SF6 gas leakage rate (≤1%) 
Suitable for utility, industrial, renewable energy, and transmission applications 

Designed for operation in harsh outdoor environments, the circuit breaker performs reliably in ambient temperatures ranging from -50°C to +50°C and maintains an SF6 gas leakage rate of ≤1% per year, helping ensure long-term operational stability.

With rated voltages up to 220 kV, rated currents up to 4000 A, and short-circuit breaking capacities up to 63 kA, the LW30 complies with the demanding requirements of modern high-voltage power systems.

The LW30 SF6 Dead Tank Circuit Breaker is widely used in:

• High-voltage transmission substations 
• Utility power distribution networks 
• Renewable energy substations 
• Industrial power systems 
• Grid expansion and infrastructure projects 
• Outdoor AIS substations