Issue 1 6
6.1.4 STOPPING SEQUENCE
The return delay timer operates to ensure that the starting request has been permanently removed
and isn’t just a short term removal.
After the return delay timer, the generator load switch is opened, then after the transfer timers, the
mains is placed back on load.
Should another start request be made during the cooling down period, the generator will be placed on
load.
The cooling timer allows the set to run off load and cool sufficiently before being stopped. This is
particularly important where turbo chargers are fitted to the engine.
After the cooling timer has expired, the set is stopped.
6.2 MANUAL OPERATION
Manual mode allows the operator to start and stop the set manually, and if required change the state
of the load switching devices. Manual off load mode is active when the Manual button is pressed.
6.2.1 STARTING SEQUENCE
The start request is sent to the generator via the start/run relay output.
If the generator fails to become available before the generator failure timer expires. This is indicated
on the LCD display, but the starting signal remains active.
6.2.2 GENERATOR OFF LOAD
The generator will continue run OFF LOAD in this mode unless:
The mains supply fails
An input is given for Auxiliary Mains Failure
An input is given for Transfer to Generator
The fascia mounted transfer buttons are pressed (when configured)
6.2.3 GENERATOR ON LOAD
Once on load, the generator will remain on load unless:
An input is given for Transfer to Mains
The fascia mounted transfer buttons are pressed (when configured)
The module mode is changed to STOP\RESET or AUTO mode. The system may then transfer back
to mains supply automatically if conditions are suitable.
6.2.4 TRANSFER BUTTONS OPERATION
Two fascia mounted buttons are provided for load switching operation when in manual mode.
Pressing this button when the mains is on load will open the mains load switch.
Pressing this button when the generator is on load and the mains is healthy, will
open the generator load switch, wait for the duration of the transfer delay, then
close the mains load switch.
Pressing this button when the generator is on load will open the generator load
switch. Pressing this button when the mains is on load and the generator is
available, will open the mains load switch, wait for the duration of the transfer
delay, then close the generator load switch.
6.2.5 STOPPING SEQUENCE
The set will not be stopped in this mode of operation.
To begin the stopping sequence, the module should be placed in the AUTO or PROHIBIT RETURN
mode.
