HGM1790N Genset Controller User Manual Page 12 of 31
5. PROTECTION
Table 5 Controller Alarms
Controller sent alarms when detected emergency
shutdown alarms.
Controller sent alarms when genset speed is
higher than over speed threshold and lasts for over
2s.
Controller sent alarms when generator frequency is
higher than over frequency threshold and lasts for
over 2s.
Detection after warming up delay, controller sent
alarms when speed is lower than under speed
threshold and lasts for over 10s.
Detection when genset is normal running,
controller sent alarms once genset frequency fell
below under frequency threshold and lasts for over
10s.
Detection after safe running delay, controller sent
alarms once genset temperature is higher than
over temp. threshold and lasts for over 3s.
Detection after safe running delay, controller sent
alarms when high temperature input is active.
Temp. Sensor
Open/Short Circuit Shut
Detection after safe running delay, controller sent
alarms when temperature sensor resistance value
is above 6000Ω or under 5Ω.
Detection after safe running delay, controller sent
alarms when genset oil temperature is lower than
low oil pressure threshold and lasts for over 2s.
Low Oil Pressure Input
Shut
Detection after safe running delay, controller sent
alarms when low oil pressure input is active.
Oil Pressure Sensor
Open/Short Circuit Shut
Detection after safe running delay, controller sent
alarms when oil pressure sensor resistance value
is above 6000Ω or under 5Ω.
Controller sent alarms when generator current is
higher than the preset value and over current
action is selected as “Warn”.
Controller sent alarms when generator current is
higher than the preset value and lasts for over the
delay value (over current action is selected as
“Shutdown”).
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