Deif Multi-line 2 Designers Reference Handbook page 17

AGC
A 4-20mA transducer is used for indication of the power imported from the mains.
kW
Diagram, load take over - example
The load take over mode can be combined with the short time parallel. In that
case, the generator and the mains breakers will never be closed at the same
time for a longer period than the adjusted 'short time parallel' time.
If the imported load is higher than the nominal gen-set power, an alarm appears
and the load take over sequence is paused.
Back synchronising OFF
When the start command is given, the gen-set will start. When the frequency and voltage is OK,
the mains breaker is opened and the generator breaker is closed. Now the generator supplies
the load, until the stop command is given. Then the generator breaker opens and the mains
breaker closes. The gen-set cools down and stops.
A 4-20mA transducer is used for indication of the power imported from the mains.
If the imported load is higher than the nominal gen-set an alarm appears, and
the load take over sequence is paused.
Semi-auto mode
When the generator breaker is closed, and the mains breaker is opened, the unit will use the
nominal frequency as setpoint for the speed governor. If AVR control (option D1) is selected, the
nominal voltage is used as setpoint.
When the generator is paralleled to the mains, it will be controlled, so the imported power from
the mains will be kept at 0 kW. If AVR control (option D1) is selected, the setpoint is the adjusted
power factor (6550 Fixed power setpoint).
See general semi-auto mode description on page 19.
DEIF A/S
Designer's Reference Handbook
Mains power
Generator power
t
Page 17 of 168