40.5kV Series Cubicle Type SF6 Gas Insulated Switchgear

Product Overview

GRM6-40.5 Series are new type SF6 gas-insulated compact switchgears. Circuit breakers, disconnectors, and other parts are enclosed in 3mm thick metal containers filled with low-pressure SF6 gas. Thus, the equipment is compact, reliable, and safe; free of environmental impacts, free maintenance and long service life, etc.
GRM6-40.5 Series switchgears are suitable for control, protection and monitoring of 40.5 kV, three-phase, single busbar electrical system, widely used in generating companies, mining, etc.

Product Features

• Fully insulated and enclosed design
The live parts of high voltage circuit are enclosed in the the SF6 gas-filled compartment, free from external climate changes. The circuit breaker compartment and the busbar compartment are segregated from each other within the same switchgear. The gas-filled compartments between different switchgears are also independent of each other. The busbar is connected by busbar connector, and is connected to primary cable by bushing. The protection class of the gas tank is up to IP67. The interior of gas tank, is free of external impact, could resist short-time flood and condensation.

• Newly designed mechanism and linear drive three-position switch
The circuit breaker mechanism is newly developed and designed. The main shaft/trigger shaft are all interchangeable with each other due to the modular design. The mechanism features for simplified transmission system, small volume, easy installation & maintenance, high transmission efficiency & reliability. It’s optimum design of interlock to prevent misoperation and ensure the personnel safety. The direct drive switch, equipped with three working positions, close, open and earth, has superior mechanical and electrical interlock to prevent misoperation.It has perfect manual operation function with double-operation hole design, as well as reliable mechanical position indication function.

• High Safety and Reliability
All main circuit components (vacuum circuit breaker, three-position switch) as well as main bus and branch bus are installed in the gas-filled compartment. The gas-filled compartment and cable compartment are equipped with pressure relief device to maximize personal safety and equipment operation. The products can only be earthed by the interaction between the circuit breaker and the three-position switch, as the three-position switch can only be earthed without load and the circuit breaker has better breaking abil ity than earthing swit ch. The circuit breaker and the three-position switch are sealed in the common gas tank. Environmental influences are therefore prevented, providing maintenance-free.