Huawei SUN2000-50KTL-ZHM3 User Manual page 86

SUN2000-(50KTL-ZHM3, 50KTL-M3)
User Manual
ID Name
2038 Unstable
grid
frequenc
y
2039 AC
Overcurr
ent
2040 Output
DC
compon
ent
overhigh
2051 Abnorm
al
residual
current
Issue 05 (2023-02-28)
Severity Cause
Major Cause ID = 1
Power grid exception: The
actual change rate of the
power grid frequency does
not meet the requirements
for the local power grid
code.
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 of the
inverter output current
exceeds the upper
threshold.
Major Cause ID = 1
The insulation impedance
of the input side to PE
decreases when the
inverter is operating.
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Solution
1. If the alarm occurs
occasionally, the power grid
may be abnormal
temporarily. The inverter
automatically recovers after
detecting that the power grid
becomes normal.
2. If the alarm persists, check
whether the power grid
frequency is within the
acceptable 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 inverter monitors its
external operating conditions
in real time and
automatically recovers after
the fault is rectified.
2. If the alarm persists and
affects the energy yield of the
PV plant, contact your dealer
or Huawei technical support.
1. If the alarm occurs
accidentally, the external
power cable may be
abnormal temporarily. The
inverter automatically
recovers after the fault is
rectified.
2. If the alarm persists or lasts a
long time, check whether the
impedance between the PV
string and ground is too low.
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