Huawei CloudEngine 7800 Series Hardware Description page 146

CloudEngine 7800&6800&5800 Series Switches
Hardware Description
Function
PHD-600WA-B and PHD-600WA-F power modules use different airflow designs but have the
same functions.
Table 3-26 Functions of 600 W high-voltage DC power modules
Function
Input
protection
Output
protection
Overtemperature protection
Heat dissipation
Hot swap
Panel
Figure 3-23
Issue 16 (2015-08-26)
Table 3-26
Input
overvoltage
protection and
undervoltage
protection
Input
overcurrent
protection
Output
overvoltage
protection
Output
overcurrent
protection
Output short-
circuit
protection
NOTE
When a power module enters overtemperature protection state, take measures to lower the ambient
temperature. The power module can automatically resume power supply when the temperature falls within
the normal range.
and Figure 3-24
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Copyright © Huawei Technologies Co., Ltd.
describes the functions of them.
Description
In either of the two protection states, the power module stops
supplying power. When the input voltage restores to the
normal range, the power module automatically resumes
power supply.
In this protection state, the power module stops supplying
power and cannot automatically resume power supply when
the input current restores to the normal range.
In this protection state, the power module stops supplying
power intermittently. When the system recovers from output
overvoltage, the power module automatically resumes power
supply.
In this protection state, the power module supplies power
intermittently. When the output current is limited within a
range, the power module automatically resumes power
supply.
In this protection state, the power module supplies power
intermittently. When the short circuit is removed, the power
module automatically resumes power supply.
When the temperature of the power module exceeds a
specified threshold, the power module stops supplying
power. When the temperature falls into the normal range, the
power module automatically resumes power supply.
l PHD-600WA-B: back-to-front airflow
l PHD-600WA-F: front-to-back airflow
Supported
show the panels of 600 W high-voltage DC power modules.
3 Power Module
136