InteliSys
NT
-AFR-Abstract, SW version 1.0, ©ComAp – December 2006 3
IS-NT-AFR-1.0-Abstract.pdf
General guidelines
This manual provides general information on how to operate the IS-NT-AFR controller.
This manual is intended for everybody who is concerned with operation and maintenance of the gen-
set.
Description of the controller system
NT family controllers are comprehensive AMF-controllers for single and multiple generating sets
operating in stand-by or parallel modes. Synchronizer, isochronous load sharer, Mains and Generator
protections allow for a total integrated solution for gen-sets in stand-by and parallel modes with
multiple engine support.
NT family controllers are equipped with a powerful graphic display showing icons, symbols and bar-
graphs for intuitive operation, which sets, together with high functionality, new standards in gen-set
controls.
The controller automatically starts the gen-set, closes the gen-set C.B. when all conditions are met,
then stops the engine on external signal or by pressing push buttons.
Parallel to Mains operation can be achieved without additional HW. Forward and reverse
synchronizing, Mains protection including vector shift, load and power factor control, earth fault
protection are the major functions provided. Interfacing to foreign synchronizers and load sharers is
supported.
The key feature of NT family controllers is their easy-to-use installation and operation. Predefined
configurations for typical applications are available as well as user-defined configurations for special
applications.
Default applications
There are four default applications: SPI, SPtM, MINT, COX.
SPI
S
ingle
P
arallel
I
sland application - for single gen-sets in parallel with mains or in island
operation; suitable for CHP application; no MCB control
SPtM
S
ingle
P
arallel
t
o
M
ains application - for single gen-sets in parallel with mains or in island
operation, with AMF support; both MCB and GCB controlled
MINT
M
ultiple application with
INT
ernal control loops - for multiple gen-sets in island parallel or
mains parallel operation; Load Sharing and VAr Sharing controlled internally; PMS
available
COX
A special application intended for
CO
operation with an e
X
ternal supervisory control
system, e.g. PLC. Most internal control sequencies are removed or reduced, all major
actions (synchronizing, load control type) are initiated via binary inputs to the NT controller.
