Huawei SUN2000-50KTL-ZHM3 User Manual page 76

SUN2000-(50KTL-ZHM3, 50KTL-M3)
User Manual
ID Name
2038 Unstable
grid
frequenc
y
2039 Output
overcurr
ent
2040 Output
DC
compon
ent
overhigh
2051 Abnorm
al
residual
current
Issue 03 (2022-08-30)
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 power grid voltage
drops dramatically or the
power grid is short-
circuited. As a result, the
inverter transient output
current exceeds the upper
threshold, and protection is
triggered.
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 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, check whether the
output is short-circuited. If
the fault cannot be rectified,
contact your dealer or
Huawei 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.
69