Huawei PDU8000 User Manual page 136

PDU8000 Modular Precision Power Distribution Cabinet
User Manual (1100 mm Deep)
Alarm
Name
Main input
outage
Main input
CT reverse
connect
Main input
breaker
tripping
Main input
overvoltage
Main input
undervoltag
e
Main input
overfrequen
cy
Issue 01 (2019-02-25)
Alarm Impact
Severity
Critical The input power
has three open
phases.
Major The common
polarity terminal
and common
terminal on a
phase current
transformer of a
mains phase are
reversely
connected.
The mains switch
Critical
has tripped.
Critical Input
overvoltage:
Input voltage V >
1.2 x Rated
voltage (Multiple:
1.05–1.25;
confirmation
time: 2–10s).
Critical Input
undervoltage:
Input voltage V <
0.85 x Rated
voltage (Multiple:
0.75–0.95;
confirmation
time: 2–10s).
Major The input
frequency is 1.5
Hz higher than
the configured
frequency. The
frequency setting
range is 50–60
Hz.
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance Guide
Possible Solutions
Cause
The input Check the input power.
power supply
is faulty.
N/A Switch cables
connected to the
common polarity
terminal and common
terminal.
uses dual-input as an
example to show the
cable connection for
the common polarity
terminal and common
terminal of the current
transformer for route I
phase L1.
The back-end Check whether the
is back-end current is
short-circuited short-circuited or
or experiences experiences
overcurrent. overcurrent.
The input Check the input power.
power supply
is faulty.
The input Check the input power.
power supply
is faulty.
The input Check the input power.
power supply
is faulty.
Figure 8-1
129