Deif Multi-line 2 - Page 20

AGC Designer’s Reference Handbook
DEIF A/S Page 20 of 168
When the gen-set is running in semi-auto mode, the unit will control the speed governor and the
AVR, if option D1 is selected.
The following sequences can be activated in semi-auto:
Command Description Comment
Start The start sequence is initiated and continues until the gen-
set starts or the maximum number of start attempts has
been reached. The frequency (and voltage) will be
regulated to make the GB ready to close.
Stop The gen-set will be stopped. After disappearance of the
running signal, the stop sequence will continue to be active
in the ‘extended stop time’ period. The gen-set is stopped
without cooling-down time.
Close GB The unit will close the generator breaker, if the mains
breaker is open, synchronise and close the generator
breaker, if the mains breaker is closed.
When AMF mode
is selected, the
unit will not regu-
late after breaker
closure.
Open GB The unit will ramp down and open the generator breaker at
the breaker open point, if the mains breaker is closed. The
unit will open the generator breaker instantly, if the mains
breaker is open or the gen-set mode is island mode.
Close MB The unit will close the mains breaker, if the generator
breaker is open, synchronise and close the mains breaker,
if the generator breaker is closed.
Open MB The unit opens the mains breaker instantly.
Manual
GOV UP
The regulator is deactivated and the governor output is
activated as long as the GOV input is ON.
Manual
GOV DOWN
The regulator is deactivated and the governor output is
activated as long as the GOV input is ON.
Manual
AVR UP
The regulator is deactivated and the governor output is
activated as long as the AVR input is ON.
Option D1 is
required.
Manual
AVR DOWN
The regulator is deactivated and the governor output is
activated as long as the AVR input is ON.
Option D1 is
required.
General test mode description
The test mode function is activated by selecting test with the MODE push-button on the display
or by activating a digital input, if one of them is configured to ‘test’. The test mode will only test
synchronising, if the ‘Sync. to mains’ function is enabled. If this is the case, the gen-set will start,
and the unit will synchronise and close the generator breaker to let the gen-set run in parallel,
until the test time expires. If the ‘Sync. to mains’ function is not activated, then the gen-set will
start and run at the nominal frequency with the generator breaker open.
It is possible to manually increase and decrease the speed/voltage when semi-
auto is selected. When the digital up/down input is activated, then the regulator
is deactivated as long as the manual up/down inputs are activated.
Manual voltage control is option dependent (option D1).