Interlocks in case of feeder panels, single busbar switchgear WSA
on front control panel (all interlocks mechanical)
The interlocks act as appropriate in case of remote control
Circuit-breaker ON OFF ON OFF
OFF button free – blocked –
Energy-storing device – – – released
Disconnector ON/OFF ON OFF OFF
Interrogating lever blocked free blocked free
Earthing switch OFF OFF ON OFF
Interrogating lever blocked blocked free free
Crank – – – blocked
– of no significance as regards interlocks
Interlocks in case of feeder panels, double busbar switchgear WSB
on front control panel (interrogating lever locked electro-magnetically)
The interlocks act as appropriate in case of remote control
bus coupler switched OFF bus coupler switched ON
Circuit-breaker ON OFF ON OFF ON OFF
OFF button free – blocked – free –
Energy-storing device – – – released – –
Disconnector 1 ON/OFF ON OFF OFF ON ON
Interrogating lever 1 blocked free blocked free blocked free
Disconnector 2 ON/OFF OFF OFF OFF OFF OFF
Interrogating lever 2 blocked blocked blocked free free free
Earthing switch OFF OFF ON OFF OFF OFF
Interrogating lever blocked blocked free free blocked blocked
Crank – – – blocked – –
– of no significance as regards interlocks
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