HGM9520N Genset Paralleled Controller User Manual Page 24 of 111
5.2
BLOCK ALARMS
When the controller detects block signals, it only issues warning and the genset does not shut down
and not open. Users need to reset alarms manually.
Table 9 Block Alarms
No
Type
Description
1
Over Speed
When this is enabled, and the controller detects that the genset speed
is above the pre-set limit, it will initiate a block alarm.
It is always detected.
2
Under Speed
When this is enabled and the controller detects that the genset speed is
below the pre-set limit, it will initiate a block alarm.
It is detected after “warming up” and before “stop idle”.
3
Loss of Speed Signal
When the controller detects the genset speed is 0, it shall issue a block
alarm.
It is detected after “safety on time” and before “ETS solenoid hold”.
4
Gen Over Frequency
When this is enabled, and the controller detects the genset frequency is
above preset limit, it shall issue a block alarm.
It is detected always.
5
Gen Under Frequency
When this is enabled, and the controller detects the frequency is below
the preset limit, it shall issue a block alarm.
It is detected after “warming up’ and before “stop idle’.
6
Gen Over Voltage
When this is enabled, and the controller detects the genset voltage is
above preset limit, it shall issue a block alarm.
It is detected always.
7
Gen Under Voltage
When this is enabled, and the controller detects the voltage is below the
preset limit, it shall issue a block alarm.
It is detected after “warming up” and before “stop idle”.
8
Gen Over Current
When this is enabled, and the controller detects the genset current is
above preset limit, it shall issue a block alarm.
It is detected always.
9
Negative Sequence
Current
When this is enabled, and the controller detects the unbalanced current
is above preset limit, it shall issue a block alarm.
It is detected always.
10
Earth Fault
When this is enabled, and the controller detects the earth current is
above the preset limit, it shall issue a block alarm.
It is always detected.
11
Reverse Power
When this is enabled, and the controller detects the reverse power
(negative) is above the preset limit, it shall issue a block alarm.
It is always detected.
12
Over Power
When this is enabled, and the controller detects the genset power
(positive) is above the preset limit, it shall issue a block alarm.
It is always detected.
13
Loss Excitation
When this is enabled, and the controller detects the genset reactive
