Huawei SUN2000 Series User Manual page 82

SUN2000-(90KTL-100KTL) Series
User Manual
Alarm Alarm
ID Name
2040 Output
DC
Compon
ent
Overhigh
2051 Abnorma
l
Residual
Current
2061 Abnorma
l
Groundin
g
2062 Low
Insulatio
n
Resistanc
e
2063 Cabinet
Overtem
perature
Alarm
Cause
Severit
y
Major The DC component of the SUN2000
output current exceeds the specified
upper threshold.
Major The insulation impedance of the input
side to PE decreases when the
SUN2000 is operating.
1. The PE cable for the SUN2000 is
Major
not connected.
2. The SUN2000 output side does not
connect to an isolation transformer
when the PV string output is
grounded.
1. The PV string is short-circuited to
Major
PE.
2. The PV string has been in a moist
environment for a long time and the
power cable is not well insulated to
ground.
1. The SUN2000 is installed in a
Major
place with poor ventilation.
2. The ambient temperature exceeds
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Measures
production of the PV plant,
check whether the output is
short-circuited. If the fault
persists, contact Huawei
technical support.
1. If the exception is caused by
an external fault, the SUN2000
automatically recovers after
the fault is rectified.
2. If the alarm occurs frequently
and affects the power
production of the PV plant,
contact Huawei technical
support.
1. If the alarm occurs
accidentally, the external
power cable may be abnormal
temporarily. The SUN2000
automatically recovers after
the fault is rectified.
2. If the alarm occurs frequently
or persists, check that the
impedance between the PV
string and ground is not below
the lower threshold.
1. Check that the PE cable for the
SUN2000 is connected
properly.
2. If the PV string output is
grounded, check that the
SUN2000 output side connects
to an isolation transformer.
1. Check the impedance between
the PV string and the PE cable.
If a short circuit occurs, rectify
the fault.
2. Check that the PE cable for the
SUN2000 is correctly
connected.
3. If you are sure that the
impedance is less than the
default value in a cloudy or
rainy environment, reset
Insulation resistance
protection.
1. Check the ventilation and
ambient temperature at the
SUN2000 installation position.
76