HGM9120 Genset Controller
HGM9120 Genset Controller Version: 1.0 2014-04-14 Page 20 of 58
4.6 SWITCH CONTROL PROCEDURES
4.6.1 HGM9120 SWITCH CONTROL PROCEDURES
Manual transfer procedures
When controller is in
Manual
mode, the switch control procedures will start through manual
transfer procedures.
Users can control the loading transfer of ATS via pressing
button.
A.
If “Open breaker detect” is “SELECT Disable”
Press generator switch on or off key
, if generator has taken load, will send unload
signal; if taken no load, generator will send load signal; if mains has taken load, mains will
unload, and then generator will take load after
“open delay” has expired.
Press mains switch on or off key
, if mains has taken load, will send unload signal; if
taken no load, mains will send load signal; if generator has taken load, generator will
unload, and then mains will take load after
“open delay” has expired.
B.
If “Open breaker detect” is “SELECT Enable”
To transfer load from mains to generator need to press mains switch off key
firstly.
After switch off delay, press generator switch on key
,and generator will take load
(there is no action when pressing switch on key directly).
The way to transfer from generator to mains is as same as above.
Auto transfer procedures:
When controller is in AUTO mode, switch control procedures will start through automatic
transfer.
1. If input port is configured as Close Mains Auxiliary
A.
If “Open breaker detect” is “SELECT Enable”
When transferring load from mains to generator, controller begins
detecting “fail to
transfer”, then the open delay and transfer rest delay will begin. When detecting time out,
if switch open failed, the generator will not switch on, otherwise, generator switch on.
Detecting
“fail to transfer” while generator switch on. When detecting time out, if switch on
fail, it is need to wait for generator to switch on. If transfer failed
and warning “SELECT
Enable”, there is alarming signal whatever switch on or off failure.
The way to transfer from generator load to mains load is as same as above.
B.
If “Open breaker detect” is “SELECT Disable”
