Huawei SUN2000-33KTL-US User Manual page 113

SUN2000-(33KTL, 36KTL, 40KTL)-US
User Manual
Alarm ID Alarm
Name
305 Abnormal
Grid
Frequency
Issue 07 (2019-06-20)
Alarm Possible Cause
Severity
ID = 31)/B (cause ID =
32)/C (cause ID = 33) to the
PE cable is low or
short-circuited.
Major  Cause ID = 2
The actual grid frequency is
higher than the standard
requirement for the local
power grid.
 Cause ID = 4
The actual grid frequency is
lower than the standard
requirement for the local
power grid.
 Cause ID = 5
The actual change rate of
the grid frequency does not
meet the standard
requirement for the local
power grid.
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Suggestion
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
with lower impedance and resolve
the issue.
Cause ID = 2/4
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 frequency
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
overfrequency and
underfrequency protection
thresholds with the consent of the
local power operator.
Cause ID = 5
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 frequency
8 Maintenance
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