Deif Multi-line 2 Designers Reference Handbook page 47

AGC
Before closing the breakers it must be checked that the voltage and frequency are OK. The
limits are adjusted in 2040 Sync. blackout
AGC without back synchronisation:
The GB can only be closed, if the mains breaker is open.
The MB can only be closed, if the generator breaker is open.
AGC with back synchronisation:
If the GB or MB push-button is activated the AGC will start synchronising, if the
generator or mains voltage is present.
The GB can close directly, if the MB is open.
The MB can close directly, if the GB is open.
AMF MB opening function (6590 Mains failure voltage
)
It is possible to select the functionality of the mains breaker closing function. This is necessary, if
the unit operates in Automatic Mains Failure (AMF).
The possibilities are:
Selection
Start engine and open mains breaker
Start engine
AMF timers
The time charts describe the functionality at a mains failure and at mains return. Back
synchronisation is deactivated. The timers used by the AMF function are indicated in the table
below:
Timer
t
FD
t
FU
t
FOD
t
GBC
t
MBC
The timer t is only active, if back synchronisation is deactivated (6610 Mains breaker
MBC
DEIF A/S
Description
When a mains failure occurs, the mains breaker
opens, and the engine starts at the same time.
When a mains failure occurs, the engine starts.
When the generator is running and the frequency
and voltage are OK, the MB opens and the GB
closes.
Description
Mains failure delay
Frequency/voltage OK
Mains failure OK delay
GB ON delay
MB ON delay
Designer's Reference Handbook
Menu number
6600 Mains failure frequency
6590 Mains failure voltage
6190 f/U OK
6600 Mains failure frequency
6590 Mains failure voltage
6250 GB control
6610 Mains breaker control
Page 47 of 168