ABB
13
Uniswitch Operation and
Maintenance Manual
UNIS14GB 05-02
References Further details about installation and equipping the switchgear can be
obtained from the order documents.
3.2.3 Service continuity
LSC Category For switchgear the Loss of Service Continuity Category (LSC) describes
the extent to which other compartments and/or functional units may
remain energised when a main circuit compartment is opened.
According to IEC 62271-200 the Loss of Service Continuity (LSC) of
Uniswitch switchgear is LSC2A-PI. The PI denotes that partition and
shutters are insulation.
Table 3.1 Accessibility to compartments (according to IEC 62271-200).
Part of the switchgear that can be left energised
Cable corresponding to the
functional unit
All other functional units
Fuse/cable No Yes
Busbar Not relevant: non-accessible Not relevant: non-accessible
Circuit-breaker (fixed) No Yes
Circuit-breaker
(withdrawable)
No Yes
Compartment to
be opened
Low voltage Yes Yes
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