Huawei SUN2000-250KTL Series User Manual page 88

SUN2000-(250KTL, 280KTL, 300KTL, 330KTL) Series
User Manual
Alar Alarm
m ID Name
2037 Grid
Underfre
quency
2038 Unstabl
e Grid
Frequen
cy
2039 AC
Overcurr
ent
2040 DC
Compon
ent
Overhig
h
Issue 02 (2022-12-20)
Alarm Possible Cause
Severity
Major Cause ID = 1
Power grid exception: The
actual power grid
frequency is lower than the
standard requirement for
the local power grid.
Major Cause ID = 1
Power grid exception: The
actual grid frequency
change rate does not
comply with the local
power grid standard.
Major Cause ID = 1
The grid experiences a
dramatic voltage drop or is
short-circuited. As a result,
the transient AC current of
the device exceeds the
upper threshold and
triggers protection.
Major Cause ID = 1
The DC component in the
AC current exceeds the
upper threshold.
Copyright © Huawei Technologies Co., Ltd.
8 System Maintenance
Suggestion
1. If the alarm occurs occasionally,
the power grid may be abnormal
temporarily. The device
automatically recovers after
detecting that the power grid
becomes normal.
2. If the alarm occurs frequently,
check whether the power grid
frequency is within the allowed
range. If not, contact the local
power operator. If yes, modify the
power grid underfrequency
protection threshold after
obtaining the consent of the local
power operator.
1. If the alarm occurs occasionally,
the power grid may be abnormal
temporarily. The device
automatically recovers after
detecting that the power grid
becomes normal.
2. If the alarm occurs frequently,
check whether the power grid
frequency is within the allowed
range. If not, contact the local
power operator.
1. The device detects its external
working conditions in real time.
After the fault is rectified, the
device automatically recovers.
2. If the alarm occurs frequently and
affects the operation of the power
plant, check whether AC short
circuit exists. If the fault persists,
contact your dealer or technical
support.
1. The device detects its external
working conditions in real time.
After the fault is rectified, the
device automatically recovers.
2. If the alarm occurs frequently,
contact your dealer or technical
support.
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