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Willmall high voltage busbar insulators support and isolate medium-voltage busbars, holding the larger clearances and withstand levels that MV switchgear requires.
It is an insulating support that carries medium-voltage busbars, providing both the mechanical support and the insulation to earth.
The withstand voltage and creepage distance, matched to the system voltage and the insulation coordination of the installation.
It is used in medium-voltage switchgear and substation busbar systems where large clearances are required.
It is bolted to the switchgear frame with the busbar mounted on the top fixing interface.
Fault and switching currents produce mechanical force on the busbar, and the insulator must hold position to preserve clearance.
