Huawei SUN2000 Series User Manual page 97

SUN2000-(29.9KTL, 33KTL-A, 36KTL, 42KTL)
User Manual
Alarm ID Alarm
Name
301 Abnormal
Grid
Voltage
Issue 11 (2019-06-08)
Alarm Possible Cause
Severity
Major The grid voltage is beyond the
acceptable range. The possible
causes are as follows:
 Cause ID = 4
The grid voltage is below
the specified lower
threshold.
 Cause ID = 16
The grid voltage exceeds
the specified upper
threshold.
 Cause ID = 19
The grid voltage has
exceeded the specified
upper threshold for 10
minutes.

Cause ID = 26
The grid voltage exceeds
the specified upper
threshold.

Cause ID = 28
The three phases of the
power grid differ greatly in
voltage.

Cause ID = 29
1. The power grid
experiences an outage.
2. The AC circuit is
disconnected or AC
switch is OFF.
 Cause ID = 31/32/33
The impedance of the
output phase wire A (cause
ID = 31)/B (cause ID =
32)/C (cause ID = 33) to the
PE cable is low or
short-circuited.
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8 Maintenance
Suggestion
Cause ID = 4
1. If the alarm occurs accidentally,
the power grid may be abnormal
temporarily. The SUN2000
automatically recovers after
detecting that the power grid
becomes normal.
2. If the alarm occurs frequently,
check whether the grid voltage is
within the acceptable range. If
no, contact the local power
operator. If yes, log in to the
SUN2000 app, SmartLogger, or
NMS to modify the grid
overvoltage and undervoltage
protection thresholds with the
consent of the local power
operator.
3. If the fault persists for a long
time, check the AC switch and
AC output power cable.
Cause ID = 16/19/26
1. Check whether the grid-tied
voltage exceeds the upper
threshold. If yes, contact the local
power operator.
2. If you have confirmed that the
grid-tied voltage exceeds the
upper threshold and obtained the
consent of the local power
operator, modify the overvoltage
and undervoltage protection
thresholds.
3. Check whether the peak grid
voltage exceeds the upper
threshold.
Cause ID = 28
1. If the exception is caused by an
external fault, the SUN2000
automatically recovers after the
fault is rectified.
2. If the alarm persists and affects
the energy yield of the power
station, contact the local power
operator.
Cause ID = 29
1. Check the AC voltage.
2. Check that the AC power cable is
securely connected and that the
AC switch is ON.
Cause ID = 31/32/33
Check the impedance of output
phase wire A (cause ID = 31)/B
(cause ID = 32)/C (cause ID = 33) to
the PE cable and locate the position
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