Huawei SUN2000-50KTL-ZHM3 User Manual page 75

SUN2000-(50KTL-ZHM3, 50KTL-M3)
User Manual
ID Name
2032 Grid loss
Grid
2033
undervolt
age
2034 Grid
overvolta
ge
2035 Grid volt.
Imbalanc
e
Issue 01 (2022-07-29)
Severity Cause
short-circuited to PE.
Major Cause ID = 1
Power grid outage occurs.

The AC circuit is

disconnected or the AC
switch is off.
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.
Major Cause ID = 1
The difference between power
grid phase voltages exceeds the
Copyright © Huawei Technologies Co., Ltd.
Solution
1. The alarm is cleared
automatically after the power grid
recovers.
2. Check whether the AC circuit is
disconnected or the AC switch is
off.
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 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.
3. If the alarm persists for a long
time, check the AC circuit
breaker and AC output power
cable.
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. If yes, modify the grid
overfrequency protection
threshold through the app,
SmartLogger, or NMS with the
consent of the local power
operator.
3. 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.
1. If the alarm occurs occasionally,
the power grid may be abnormal
temporarily. The inverter
automatically recovers after
8 Maintenance
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