2 - 10
Chapter Two
Supply-on-test wiring - general points
•
The cable lugs should be clamped directly to the RMU connection points ensuring all
securing nuts are tight. Lug connections should be torqued to 54 Nm.
•
It is good practice to route the three phase conductors in a close trefoil layout, held
together with correctly rated cable cleats. This minimises stray magnetic fields from
the cable array, and reduces inductive losses in the cables. In the event of a high
fault current flowing this arrangement minimises the risk of sudden and violent cable
movements.
•
Please ensure local regulations are followed.
•
If the connections are made using more than one conductor for each phase connection
all the cables on any one phase should be of exactly the same length, and laid along
a similar route. To minimise eddy current losses, etc. the conductors should be
distributed equally between the terminals and the cable entry openings.
•
The Load Bank supply cables must be protected by the Short Circuit Protective Device
(SCPD), which is suitably rated to the capacity of the supply cables.
Note: 8800 S
ERIES
load
banks are fitted with a
3-phase fan motor and
an external 3-phase
mains input will be
required for the controls
and fan supply.