Altivar 1260 Medium Voltage Drives Page 49 Primary components

Grounding switch 49 Altivar 1260 MV variable speed drive Grounding switch and key exchange unit To help ensure absence of voltage in the cabinets during maintenance, there is a grounding switch with three terminals each installed in the equipment to help ensure that the DC bus is grounded (DC+, DC- and DC0). The DC bus can only be grounded using the switch when access to the inside of the cabinet is required. This component helps ensure the drive is de-energized whenever operations on the inside of the cabinet are performed. Component Characteristics Grounding switch Voltage: 7.2 KV Short-circuit current: 16 kA

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