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a
Selecting Power Cables
Upgrading the Number of Power Inputs and Circuit Breaker Configurations
NOTE
The following table lists the specifications of two upgrade schemes for the power inputs of PSUs on
the left side of a U32 Enhanced subrack. The number of the power inputs of PSUs on the right side of
the subrack can be the same as that on the left side of the subrack.
Power Input
Scheme
Initial phase (3+3)
Upgrade (4+4)
Upgrade (5+5)
NOTE
PSU power supply pools use the N+N (3 ≤ N ≤ 5) power distribution mode. N refers to the number of
configured PSU power inputs. In the initial phase, the 3+3 power distribution mode is applied. For an
upgrade, the 4+4 or 5+5 power distribution mode can be applied.
Using copper
fittings:
Not using
copper fittings:
Number of Power
Inputs
2
3
3
4
4
5
60
Circuit Breaker
1 x 63 A + 1 x 125 A
Copper fittings for PSUs
3 x 63 A
2 x 63 A + 1 x 125 A
Copper fittings for PSUs
4 x 63 A
3 x 63 A + 1 x 125 A
Copper fittings for PSUs
5 x 63 A
Copper Fitting
Not required
Not required
Not required
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