A recent Caterpillar shovel order, which was headed to Australia in January, included an option for a DC link grounding switch.
The grounding switch is located within the inverter cabinet, but is actuated externally and includes a sight window so the ground connections can be physically verified in addition to status indicators.
Its main products include SF6 open circuit breaker, disconnector, grounding switch, and gas-insulated metal-enclosed switchgear (GIS), the market occupation of 20%-40% in China domestic market.
3 High-pressure disconnector, grounding switch would keep pace with the industry growth
5-kv, 200-kv bil, 3,000-ampere, 3-pole, center side break, vertical mounting, manually group-operated, left-side arrangement, with top grounding switch
, outdoor, 1 each; switches, disconnecting, 34.
They will contain also a grounding switch
that short circuits the output of the supply to ground to allow save work at the magnets.