Huawei PDU8000 User Manual page 124

PDU8000 Modular Precision PDC V2.0
User Manual
Alarm
Name
Main input
CT reverse
connect
Main input
breaker
tripping
Main input
overvoltage
Main input
undervolta
ge
Main input
overfreque
ncy
Issue 04 (2021-04-13)
Alarm Impact
Severity
Major The common
polarity
terminal and
common
terminal on a
phase current
transformer of
a mains phase
are reversely
connected.
Critical The mains
switch 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
N/A Switch cables
connected to the
common polarity
terminal and
common terminal.
Figure 8-1
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- Check whether the
end is short- back-end current is
circuited or short-circuited 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.
uses
117