Huawei SUN2000-33KTL-JP User Manual page 119

SUN2000-(33KTL, 40KTL)-JP
User Manual
Ala Alarm Alarm
rm Name Severit
ID y
305 Abnorma Major
l Grid
Frequenc
y
Issue 07 (2019-06-30)
Possible Cause

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.
 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.
Copyright © Huawei Technologies Co., Ltd.
Suggestion
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 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 is within the
acceptable range. If no, contact the local
power operator.
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