Running Modes; Auto Mode - Deif SGC 420 User Manual

7. Running modes

7.1 Auto mode

Select Auto mode with the Mode selection
Site Battery Monitoring mode
DG OFF
Mains
unhealthy
BTS healthy
and Shelter temp
Yes
not high
No
Warm up
Warm up delay
expired
Shelter temp run
time expired
DG ON
Mains
healthy
Return
to Mains
Return to Mains
delay expired
Engine
cooling
Site Battery Monitoring mode enables the controller to monitor the health of the Site battery and Shelter temperature. The controller
manages the power sources (mains/genset) to keep the battery charge within the specified threshold.
If the Site battery condition is healthy, Shelter temperature is below High shelter temp threshold and mains is unhealthy, the
controller keeps both the contactors (genset and mains) open and waits for the Site battery to discharge. Once the Site battery
becomes unhealthy or the Shelter temperature is high, the controller sends a start command to the genset. The genset starts
according to the Start sequence. When the genset loading voltage and frequency are above the Minimum healthy thresholds, the
Warm-up delay timer starts. At the end of the Warm-up delay, the Load transfer delay starts and the genset latches. The running
hours stop increasing when a Stop command is received. The genset runs for the DG run duration.
After the duration is over or mains becomes healthy during the DG Run duration, the controller opens the genset contactor. If the
Shelter temp run duration is over and the temperature is not below Low temp threshold, the genset continues to run for the
configured duration. After opening the genset contactor, Engine cooling time starts. At the end of Engine cooling time, the controller
initiates the Stop sequence by giving the Stop command.
This mode also supports partial healthy condition of mains source. Partial healthy is a state in which mains is not considered as
failed, even if one or two-phases are unhealthy. The mains keep supplying power through the available phase(s). Mains failure
USER MANUAL 4189341227A UK
button.
Mains
healthy
BTS Battery
backup
BTS Battery
unhealthy
or Shelter
temp high
No
Shelter
temp below low
threshold
Yes
Low BTS
run time
expired
Page 46 of 86