Huawei SUN2000 Series User Manual page 64

SUN2000-(20KTL, 29.9KTL, 30KTL, 36KTL, 40KTL)-
M3
User Manual
ID Name
2033 Grid
undervol
tage
2034 Grid
overvolt
age
Issue 01 (2020-10-15)
Severity Cause
Major Cause ID = 1
The power grid voltage is
below the lower threshold
or the low-voltage duration
has lasted for more than
the value specified by LVRT.
Major Cause ID = 1
The power grid voltage
exceeds the upper
threshold or the high
voltage duration has lasted
for more than the value
specified by HVRT.
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Solution
● If the alarm occurs
occasionally, the power grid
may be abnormal
temporarily. The inverter
automatically recovers after
detecting that the power grid
becomes normal.
● If the alarm persists, check
whether the power grid
voltage is within the
acceptable range. If not,
contact the local power
operator. If yes, modify the
grid undervoltage protection
threshold through the app,
SmartLogger, or NMS with
the consent of the local
power operator.
● If the alarm persists for a
long time, check the AC
circuit breaker and AC output
power cable.
● If the alarm occurs
occasionally, the power grid
may be abnormal
temporarily. The inverter
automatically recovers after
detecting that the power grid
becomes normal.
● If the alarm persists, check
whether the power grid
frequency is within the
acceptable range. If not,
contact the local power
operator. If yes, modify the
grid overfrequency protection
threshold through the app,
SmartLogger, or NMS with
the consent of the local
power operator.
● Check whether the peak
voltage of the power grid is
too high. If the alarm persists
and lasts for a long time,
contact the local power
operator.
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