Use epoxy resin insulators, conductive parts made of silver-plated electrolytic copper(99.9%).
The blades are directly connected to the drive shaft. Contact elements are overdimensioned according to the requirements in order to guarantee, together with a high contact pressure between blades and contacts, a reduced ohmic resistance at the contact surface and a minimum metal wear-off during the life of the grounding switch, with the necessary robustness to withstand thermal and mechanical stresses under short-circuit conditions.
|Rated short-time withstand current||kA||31.5|
|Rated short-circuit duration||s||4|
|Rated short-circuit making current||kA||80|
|Rated peak withstand current||kA||80|
|Phases center distance||mm||280, 300, 350, 400|
|Rated insulation level||PF withstand voltage(1 min)||kV||Phase to earth||95|
|Lightning impulse withstand voltage||Phase to phase||185|
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