InteliLite
NT
– AMF20/25, SW version 2.2, ©ComAp – September 2014 27
IL-NT-AMF-2.2-Reference Guide.pdf
ATS with three stable positions
(set point MCB Logic = “CLOSE-OFF”)
MCB
FEEDBACK
ATS ll
G~
ATS l
CLOSE/OPEN
K4
0V
K4
T
+24V(12V)
LOAD
GCB
FEEDBACK
K3
MCB
ATS
l 0 ll
CLOSE/OPEN
GCB
K3
ATS
Dual Mutual Standby (Dual AMF) application
Dual AMF is system of two mutual stand-by gen-sets, which switches in supplying the load. Usual
work operation is that after mains fails, first genset starts, takes the load and works for dedicated time
interval, e.g. 6 hours. Than it hand over the load to other gen-set, which runs for another 6 hours. This
operation system continues as long as Mains is failed. Transfer of load from one gen-set to other one
is with blackout.
System works for two gensets with IL-NT-AMF25 controllers. One controller is Master and
second is Slave. Other models of IL-NT are not supported.
System needs one binary input and one binary output in each controller.
System works only in AUT mode
For correct operation both controllers have to have set identical times/delays for mains
protections, mains return delays and other delays in setpoint group AMF Settings.
Mechanical interlock between GCB of one gen-set, GCB of second gen-set and MCB breaker
is required due to safety reasons.
Detailed description:
There is a basic communication interface between Master and Slave controller realized by
interconnection of two wires (DualAMFCtrlIn, DualAMFCtrlOut) on both.
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