MGC120 Petrol Genset Controller User Manual
MGC120 Petrol Genset Controller Version 1.2 2019-02-22 Page 9 of 20
5
PROTECTION
1)
Generator overvoltage shutdown: alarm occurs when the controller detects generator voltage
exceeds overvoltage limit and the duration exceeds the generator abnormal delay value.
2) Generator under voltage shutdown: the controller detects after genset normal running and
when generator voltage is below under voltage limit and the duration exceeds the generator
abnormal delay value alarm occurs.
3) Generator over frequency shutdown: alarm and shutdown occur when generator frequency is
above over frequency limit and duration exceeds over frequency shutdown delay.
4) Generator under frequency shutdown: the controller detects after generator-set normal running
and alarm and shutdown occur when generator frequency is below under frequency limit and
duration exceeds under frequency shutdown delay.
5) Low oil pressure input shutdown: the controller detects after safety on delay, alarm and
shutdown occur when low oil pressure input is active and lasts for 2s.
6) Fail to start: alarm occurs when start still fails after pre-set start attempts.
