40.5kV High Voltage Load Break Switch with Earthing For GIS / RMU / Switchgear

The LYL-40.5 Load Break Switch with Earthing is designed for medium-voltage power distribution systems, suitable for both gas-insulated and air-insulated switchgear.
It provides safe and reliable disconnection and grounding functions under normal operating conditions.
All models comply with GB3804-2004 “3.6–40.5kV AC High-Voltage Load Switches” and GB16926-1997 “High-Voltage AC Load Switch–Fuse Combination Electrical Apparatus” standards.

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40.5kV High Voltage Load Break Switch with Earthing For GIS / RMU / Switchgear

Electrical Products

Features
Technical Parameters

Features of GIS Load Break Switch

Integrated earthing switch ensures operational safety and system reliability.

Compact structure for easy integration into GIS and ring main units.

High mechanical endurance suitable for frequent operation.

Low maintenance design, reducing long-term operation costs.

Compliant with relevant GB standards, ensuring interchangeability and compatibility with major switchgear types.

Applications

Medium-voltage switchgear

Ring main units (RMU)

Substations and distribution networks

Industrial and infrastructure power systems

Technical Parameters of GIS Load Break Switch

Item	Data
Rated voltage	40.5 kV
Rated current	630 A
Rated short-time withstand current (main circuit)	20 kA / 4s; 25 kA / 3s
Mechanical life (main circuit)	5000 operations
Rated short-time withstand current (earthing circuit)	20 kA / 2s
Mechanical life (earthing circuit)	2000 operations
Rated frequency	50 Hz
Poles	3
Installation type	Indoor / GIS or RMU