Huawei SUN2000 User Manual page 118

SUN2000 (8KTL-28KTL)
User Manual
Alarm
ID
301
Issue 07 (2014-07-30)
Alarm Alarm Causes
Name Severit
y
Grid Major The voltage of the power
Voltage grid is beyond the
Abnorm acceptable range. The
al possible causes are as
follows:

Reason ID = 1 to 6
The grid A, B, or C
phase voltage is less
than the allowable
range.
 Reason ID = 13 to 18
The grid A, B, or C
phase voltage is
higher than the
allowable range.
 Reason ID = 26
The grid voltage is
higher than the
allowable range.
 Reason ID = 27 or 28
The grid voltage
three-phase voltage is
difference.

Reason ID = 29
Power outage, or the
AC line or the AC
circuit breaker is
disconnected.
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8 Maintenance
Measures
Reason ID = 1 to 6
1. If the alarm occurs
accidentally, the possible
cause is that a power grid
is abnormal accidentally.
The SUN2000
automatically recovers to
the normal operating
status after the fault is
rectified.
2. If this alarm occurs
repeatedly, check whether
voltage of the power grid
is within the acceptable
range. If no, contact the
local power operator. If
yes, change the power grid
overvoltage and
undervoltage protection
points after obtaining
approval from the local
power operator. For
details about how to
change the points, see
7.2.9 Setting Protection
Parameters.
3. If the fault persists for a
long time, check the AC
circuit breaker and output
cable of the SUN2000.
Reason ID = 13 to 18, or 26
1. Check whether the feed
grid point voltage is too
high, if it is, contact your
local power operators.
2. If confirm feed grid point
voltage is higher than the
permissible scope of
consent and the consent of
the local power operators,
modify the undervoltage
protection point.
3. Check whether the grid
voltage peak is too high.
Reason ID = 27 or 28
1. The SUN2000 detects its
external working
conditions in real time,
and therefore the
SUN2000 automatically
recovers to the normal
operating status after the
fault is rectified.
2. If the alarm is repeated,
affect the normal power
generation of the power
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