PDU8000 Modular Precision PDC V2.0
User Manual
8 Maintenance Guide
Issue 03 (2018-01-25)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
121
Alarm
Name
Alarm
Severity
Impact
Possible
Cause
Solutions
Main input
CT reverse
connect
Major
The common
polarity terminal
and common
terminal on a
phase current
transformer of a
mains phase are
reversely
connected.
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.
Main input
breaker
tripping
Critical
The mains switch
has tripped.
The back-end
is
short-circuited
or experiences
overcurrent.
Check whether the
back-end current is
short-circuited or
experiences
overcurrent.
Main input
overvoltage
Critical
Input
overvoltage:
Input voltage V >
1.2 x Rated
voltage (Multiple:
1.05–1.25;
confirmation
time: 2–10s).
The input
power supply
is faulty.
Check the input power.
Main input
undervoltag
e
Critical
Input
undervoltage:
Input voltage V <
0.85 x Rated
voltage (Multiple:
0.75–0.95;
confirmation
time: 2–10s).
The input
power supply
is faulty.
Check the input power.
Main input
overfrequen
cy
Major
The input
frequency is 1.5
Hz higher than
the configured
frequency. The
frequency setting
range is 50–60
Hz.
The input
power supply
is faulty.
Check the input power.