Huawei SUN2000-30KTL-US User Manual page 113

SUN2000-(25KTL, 30KTL)-US
User Manual
Alarm ID Alarm
Name
305 Frequency
Abnormal
313 Low
Array
Insulation
Resistance
318 Residual
Current
Abnormal
Issue 09 (2019-06-30)
Alarm Causes
Severity
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.
Major Cause ID = 1
 A short circuit exists
between PV strings and
protection ground.
 PV strings are installed in a
permanently moist
environment.
Major Cause ID = 1
The insulation resistance
against the ground at the input
side decreases during SUN2000
operation, which causes
excessively high residual
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Measures
Cause ID = 2/4
1. If the alarm occurs accidentally,
possibly the power grid is
abnormal accidentally. The
SUN2000 automatically recovers
to the normal operating status
after the fault is rectified.
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,
obtain written permission from
the local power operator and log
in to the SUN2000 app,
SmartLogger, or NMS to change
the power grid overfrequency and
underfrequency protection
thresholds.
Cause ID = 5
 If the alarm occurs accidentally,
possibly the power grid is
abnormal accidentally. The
SUN2000 automatically recovers
to the normal operating status
after the fault is rectified.
 If the alarm occurs frequently,
check whether the power grid
frequency is within the
acceptable range. If no, contact
the local power operator.
1. Check the insulation resistance
against the ground for the PV
strings. If a short circuit has
occurred, rectify the fault.
2. If the insulation resistance against
the ground is less than the default
value in a rainy environment, log
in to the SUN2000 app,
SmartLogger, or NMS to set the
Insulation resistance
protection.
1. If the alarm occurs accidentally,
possibly the external circuits are
abnormal accidentally. The
SUN2000 automatically recovers
to the normal operating status
after the fault is rectified.
2. If the alarm occurs repeatedly or
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