Distance from the PDF to
the Device
Selection of Power Cables a and b
Naked Crimping
Connector,JG2,25mm
2
,M6,1
50A,Tin Plating,For OEM
Each cable should be
equipped with one terminal
of this type.
Naked Crimping
Terminal,OT,25mm
2
,M8,Tin
Plating,Naked Ring
Terminal
Each cable should be
equipped with one terminal
of this type.
Longer than 35 m
A PDF should be placed near the device.
Formula calculating cable
cross-sectional area
S = ( I * L ) / 74
S: indicates cross-sectional area.
I: indicates the current flowing through the cable.
L: indicates distance from the PDF to the device.
2.5.4.2 AC Power Distribution Guide
This section describes AC power distribution and AC cable matchings.
NOTE
If the customer uses a purchased three-core cable, the ground core does not need to be connected to the
ground terminal on the device. This is because the ground terminal on the device has already been
connected to a separate ground cable, ensuring that the device is properly grounded.
Figure 2-70
AC power distribution
rectifier module
A
rectifier module
B
A
B
a
b
NOTE
AC power modules A and B are connected to two AC PDFs or AC distribution box through cables a and
b.
It is recommended that the current specifications of the circuit breakers (A and B) on the PDF or
distribution box be no less than 20 A (because the current specifications of the circuit breaker of the
R4850G2 power module is 20 A).
It is recommended that the current specifications of the circuit breakers (A and B) on the PDF or
distribution box be no less than 10 A (because the current specifications of the circuit breaker of the
EPW30B-48A power module is 10 A).
HUAWEI USG9500 Series
Hardware Guide
2 Hardware Installation
Issue 03 (2017-12-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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