Load Take Over - Deif Multi-line 2 Designers Reference Handbook

AGC
Semi-auto mode description
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, the generator will be controlled according to the
peak shaving setpoint. So the maximum mains import will not be exceeded in spite of the semi-
auto mode. 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.
Test mode description
See general test mode description valid for all gen-set modes on page 20.
Manual mode description
See general manual mode description valid for all gen-set modes on page 21.
Block mode description
See general block mode description valid for all gen-set modes on page 21.

Load take over

Auto mode description
Back synchronising ON
The purpose of the load take over mode is to transfer the load imported from the mains to the
gen-set for operation on generator supply only.
When the start command is given, the gen-set will start and synchronise the generator breaker
to the busbar that is being supplied by the mains. When the generator breaker is closed, the
imported load is decreased (the power is being transferred to the gen-set), until the load is at the
open breaker point. Then the mains breaker opens.
When the stop command is given, the mains breaker is synchronised to the busbar and after
closure the gen-set is deloaded, cooled down and stopped.
DEIF A/S
Designer's Reference Handbook
Page 16 of 168