2.5.4 USG9520 Power Distribution Design Guide
This section describes how to configure power distribution for the USG9520.
2.5.4.1 DC Power Distribution Guide
This section describes how to select DC power distribution cables and circuit breakers for the
DC PDF.
shows the schematic diagram of the DC power distribution.
Figure 2-69
Schematic diagram of the DC power distribution
PEM A
CR52PEMA
PEM B
CR52PEMA
A
B
a
b
shows the current parameters of each circuit breaker and each power line for the
PDF.
Table 2-18
Current parameters of each circuit breaker and each power line for the PDF (DC
PEMA)
Item
Specification
Note
Each circuit breaker (A and
B)
≥ 50 A
To protect power supplies of
different levels, it is
recommended that the
current of the circuit breaker
on the user side should be
greater than or equal to that
of the circuit breaker of the
power module (50 A).
Each power supply (A and
B)
≥42 A
To support the maximum
configuration, it is
recommended that each DC
power line should provide a
minimum of 42 A current.
HUAWEI USG9500 Series
Hardware Guide
2 Hardware Installation
Issue 03 (2017-12-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
331