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95
n
Feeder lengths
3 000 (L)
Dimension H changes with the rating, and is specified on p. 112-117
10
H
3 000 (L)
10
H
Minimum and maximum dimensions of single and double bars
Aluminium
630 A to 4000 A
Copper
800 A to 5000 A
(L) min./max. (mm)
1000 / 3000
n
Distribution lengths
Dimension H changes with the rating, and is specified on p. 112-117
Minimum and maximum dimensions of single and double bars
Aluminium
630 A to 4 000 A
Copper
800 A to 5000 A
(L) min./max. (mm)
1000 / 3000
3 000 (L)
650
850
850
650
10
H
n
Expansion lengths
Absorb the thermal expansion during normal use
that, on long runs, would otherwise cumulate and
put abnormal force on the connection points
Expansion lengths should be placed
in straight runs of more than 40 m
and repeated every 40 m
e.g. 70 m straight section
should contain 1 expansion
length in the middle
e.g. 120 m straight section should
contain 2 expansion lengths, spaced
every 40 m
All dimensions (mm) are nominal
n
Transposition lengths
1 2 3 N
N 1 2 3
N 1 2 3
N 3 1 2
N 1 2 3
N 3 1 2
1200
10
H
Phase transposition
1 2 3 N
N 1 2 3
N 1 2 3
N 3 1 2
1 2 3 N
N 1 2 3
N 1 2 3
N 3 1 2
10
1000
H
Neutral rotation
175
n
End stops
Maintain IP 55 protection at the end of a run
In runs exceeding 100 m it is recommended to include two transposition
lengths to balance mutual phase reactance and electric impedance
(one at 1/3 and one at 2/3 distance of the run)
Dimension H changes with the rating and is specified on p. 112-117
Neutral rotation can be used when the sequence of the distribution
board phases is different to that of the transformer
For more information please contact us on +44 (0) 845 600 6266