BB = busbar
Interlocks in case of busbar earthing switch and bus sectionalizer
Switch positiong Interlock
The earthing switch can only be switched on if all disconnectors assigned to
the busbar are “OFF”.
Earthing switch "ON". The interlock acts on all disconnectors assigned to
the busbar.
Bus sectionalizer locked in “ON” or “OFF” position, except when all disconnectors
in a busbar section are in “OFF” position.
Interlocks in case of bus coupler in two panel widths
on front control panel (interrogating lever locked electro-magnetically)
The interlocks act as appropriate in case of remote control
- Bus section coupler: analogously in case of single and double busbar switchgear
- Bus coupler: analogously in one panel width
- Interlocks: apply analogously even if BB1 and BB2 are interchanged
Circuit-breaker ON OFF ON OFF OFF ON
OFF button free – blocked – – blocked
2)
Energy-storing device – – – – released –
Disconnector panel 1 ON/(OFF) ON OFF OFF ON ON
Interrogator lever, panel 1 blocked free blocked free free blocked
Disconnector panel 2 OFF/(ON) OFF ON OFF OFF ON
Interrogator lever, panel 2 blocked free blocked free free blocked
Earthing switch, panel 1 OFF OFF ON OFF OFF OFF
Interrogator lever, panel 1 blocked blocked free blocked blocked blocked
Earthing switch, panel 2 OFF OFF OFF OFF OFF OFF
Interrogator lever, panel 2 blocked blocked
1)
blocked blocked blocked blocked
1)
Blocked, if a disconnector in at least one feeder panel of BB1 is ON; interlocks apply analogously even if BB1 and BB2 are interchanged
2)
Blocked, if both disconnectors are in position “ON“ in at least one feeder panel (only valid for bus couplers)
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