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6.6 Cable connection
Access to the power cables, in ENA version
switchgears, is only made from the rear, while in IEC
version switchgears it is either from the front or the
rear, (if the switchgear is not wallmounted). The
feeder cubicle terminals are provided for cable
terminal connection. Pay the utmost attention to the
position and the phase sequence.
The cubicle incoming cables must be locked and fixed
to the switchgear frame so as to safeguard the
terminals against any mechanical stresses. Depending
on the cable type (section, insulation, terminal type,
etc.) 1 or 2 cables per phase (up to 1250 A version) or
max. 4 cables per phase (up to 2000 A switchgear
version) can be connected in parallel to the
switchgear.
Note: Follow the instructions given by the
manufacturer of the terminals for the mechanical and
electrical distances between cables.
WARNING
Before working on the switchgear terminals, make
sure that the cables are earthed (three-position
disconnector in the EARTH position and circuit-
breaker closed).
Follow the instructions of the terminal
manufacturer to make the connections.
All the components removed (shields, field
distributors etc.) must be remounted in their
original position.
WARNING
With ENA version, before accessing the area
behind or alongside the switchgear make sure that
the busbars and cables of all the panels are de-
energised and earthed.
Figure 78: Connection of cables 1250 A.
Figure 79: Connection of cables 2000 A.
Figure 80: General arrangement of cable connections.
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