A Appendix
524
7SA522 Manual
C53000-G1176-C155-3
• the input indication “CB wait” is OFF and
• the input indication “Door open” is OFF.
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 CLOSE and
• the input indication “Door open” is OFF.
The disconnector can only be closed, if:
• the circuit breaker is set to OPEN and
• the disconnector is set to OPEN or CLOSE and
• the earth switch is set to OPEN or CLOSE and
• the input indication “Door open” is OFF.
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 CLOSE and
• the input indication “Door open” is OFF.
If the above requirements are not fulfilled, the actions of the switch commands will be
blocked with error messages by DIGSI
®
.
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