Siemens SIPROTEC 7SA6 Manual page 796

Distance protection relay for all voltage levels

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• the input indication ">CB wait" is set to OPEN and

• the input indication ">Door open" is set to OPEN.

The disconnector can only be closed, if:

• the circuit breaker is set to OPEN and

• the earth switch is set to OPEN and

• the disconnector is set to OPEN or CLOS and

• the input indication ">Door open" is set to OPEN.

The disconnector can only be closed, if:

• the circuit breaker is set to CLOS and

• the disconnector is set to OPEN or CLOS and

• the earth switch is set to OPEN or CLOS and

• the input indication ">Door open" is set to OPEN.

The earth switch can only be closed, if:

• the circuit breaker is set to OPEN and

• the disconnector is set to OPEN and

• the earth switch is set to OPEN or CLOS and

• the input indication ">Door open" is set to OPEN.

If requirements above-mentioned are not fulfilled, the actions of the switch commands

will be blocked with error messages by DIGSI

C53000-G1176-C156-2