InteliLite Global Guide
109
5.5.9 Dual Operation
Dual operation - AMF
Dual operation - AMF consists 2 gen-sets and 1 mains. Principle of dual operation is in switching the gen-sets in
supplying of load when there is a mains fail or LBI REMOTE START/STOP (PAGE 564) is activated on Master
controller. Each controller measures mains and its gen-set. Interlock between all breakers (GCB1, GCB2 and
MCB) is required. If there is fail of one gen-set, second gen-set will take the load.
MCB control from both controllers is not required. Slave controller in Dual Operation doesn’t control MCB (MCB
Close/Open is in open position). However it is recommended to be prepare to control MCB also from slave
controller - in case of fail of Dual Operation, both controllers are switch to normal AMF operation.
IMPORTANT: Dual operation works only in AUTO mode.
IMPORTANT: Dual operation is in fail also during process of adjustment of setpoints. In this
moment slave still tries to control MCB.
IMPORTANT: Setpoint MCB Opens On (page 263) has to be set-up to Mains Fail option.
IMPORTANT: LBI MAINS FAIL BLOCK (PAGE 559) can cause fail of dual operation system. In case of
different states of mains on master and slave controllers, alarm Dual Operation Different Mains
(page 702) is activated and gen-sets are switched to normal operation.
Note: LBI AMF START BLOCK (PAGE 526) is evaluated on both controllers. When this LBI is activated, gen-set
can’t start in dual operation. Second gen-set (without active AMF START BLOCK (PAGE 526)) will start. Gen-
sets are not swapping the load until this LBI is active. Behaviour is the same like with alarm of 2nd level.
Note: MCB Fail protection is not used in Slave controller during Dual Operation. MCB is controlled only via
Master. Slave controller has MCB Close/Open in open position all the time during Dual Operation.
Event Dual AMF
Mains Fail Evaluated by Master only
LBI REMOTE START/STOP (PAGE 564) Evaluated by Master only
Start/stop events
Dual operation - MRS
Dual operation MRS consists 2 gen-sets. Principle of dual operation is in switching the gen-sets in supplying of
load when REMOTE START/STOP (PAGE 564) is activated on Master controller (on slave controller this LBI has
no function in Dual Operation). Each controller measures its gen-set. Interlock between all breakers (GCB1 and
GCB2) is required. If there is fail of one gen-set, second gen-set will take the load.
IMPORTANT: Dual operation works only in AUTO mode.
IMPORTANT: Dual operation is in fail also during process of adjustment of setpoints.
IMPORTANT: It is not possible to use Auto Run option in Exercise timers with dual operation.
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