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4. Panel design and equipment
Switch-disconnector and cable compartment in
the panel with switch-disconnector
The switch-disconnector and cable compartment
is merged. The stationary switch-disconnector is
connected to busbars. The interconnection to the
busbar compartment is carried out by bushings,
which secures the separation of busbar
compartment from all other switchgear
compartments. The switch-disconnector and
cable compartment is also separated from other
compartments by metal partitions. The switch-
disconnector can optionally contain an integrated
earthing switch. The switching positions of the
integrated earthing switch can be indicated by an
auxiliary switch. The closing and opening of the
switch-disconnector is performed manually by a
lever with the door closed. On request, the device
can be also mounted for the motor operation of
the switch-disconnector. The switchdisconnector
can therefore be operated both locally and
remotely.
The earthing switch is always operated locally by
the operating lever.
The switchgear is constructed for the use of
single-core cables as standard. The cable
compartment usually contains supporting
insulators for the fastening of cables. On request
the cable compartment can contain the
instrument current transformers instead of the
supporting insulators. If all three current
transformers are not required, the relevant
insulators are installed instead of them.
Cable connection in the panels for 12 kV, 17.5 kV
and 24 kV: In the panel with switch-disconnector
plastic single-core cable can be connected on
each phase with a cross-section up to 240 mm
2
as
standard.
Important note:
In the case of any non standard cable connections
an agreement must be reached between the
customer and ABB during the technical
preparation stage of the order.
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