Selecting the residual current device

The device can cause a direct current in the PE conductor.

Proceed as follows to select the residual current device:

  1. If using a residual current device is not mandatory according to the standards, SEW­-EURODRIVE recommends not using a residual current device.
  2. WARNING! No reliable protection against electric shock if an incorrect type of residual current device is used. Severe or fatal injuries. If a residual current device (residual current device RCD or residual current monitor RCM) is to be used, use an universal current sensitive RCD or RCM of type B.
  3. If a residual current device is required, select the residual current device in accordance with the requirements for protecting persons, fire protection, or system protection. Observe the tripping characteristic, the deceleration, and the rated tripping current of the residual current device during selection.
  4. During project planning, ensure that the operational leakage currents in the system are as low as possible.
  5. If the operational leakage currents are too high, you can distribute the current supply among several residual current devices.