7EN02-0423-00

Example: injection exclusion with two incoming feeders and one coupling

You can use exclusion injection and a coupling to monitor two incoming feeders.

Use of circuit breakers with normally open (NO) auxiliary contacts:

Use of circuit breakers with normally closed (NC) auxiliary contacts:

If Then

The coupling is closed

The same applies as in the example for injection exclusion with two incoming feeders. See Example: injection exclusion with two incoming feeders for example of injection exclusion with two incoming feeders.

The coupling is open:

  • D1 is closed AND

  • D2 is closed

Both devices are active:

  • Device no.1 monitors the insulation of system 1,

  • Device no.2 monitors the insulation of system 2.

Device no.2 must be inhibited when the following three conditions are met:

  • D1 is closed

  • D2 is closed

  • Coupling is closed

QR code for this page

Was this helpful?