Huawei SUN2000-55KTL-HV-D1 User Manual page 103

SUN2000-(55KTL, 60KTL) Series
User Manual
Alarm ID Alarm
Name
305 Abnormal
Grid
Frequency
Issue 02 (2017-07-30)
Alarm Possible Cause
Severity
The impedance of the
output phase wire B to the
PE cable is low or
short-circuited.
 Cause ID = 33
The impedance of the
output phase wire C to the
PE cable is low or
short-circuited.
Major  Cause ID = 2
The actual power grid
frequency is higher than the
standard requirement for
the local power grid.

Cause ID = 4
The actual power grid
frequency is lower than the
standard requirement for
the local power grid.

Cause ID = 5
The actual change rate of
the power grid frequency
does not meet the standard
requirement for the local
power grid.
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8 System Maintenance
Suggestion
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
connected and that the AC switch
is ON.
Cause ID = 31
Check the impedance of output
phase wire A to the PE cable, locate
the position with lower impedance,
and resolve the issue.
Cause ID = 32
Check the impedance of output
phase wire B to the PE cable, locate
the position with lower impedance,
and resolve the issue.
Cause ID = 33
Check the impedance of output
phase wire C to the PE cable, 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 inverter
automatically recovers after
detecting that the power grid
becomes normal.
2. If the alarm occurs frequently,
check whether the power 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 power 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
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