IGS-NT Safety Manual 1.0 rev.8
Page 2 of 7
IGS-NT-1.0 – Safety Manual / ©ComAp – March 2014 / IGS-NT-1.0-SafetyManual rev.8.pdf
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ality Manageme
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Breakers control according to VDE-AR-N 4105
In SPI applications, there are controlled 2 redundant GCB breakers, based on the following picture -
Pict. 1
.
Controller behaves as a NS protection system and in case of network failure it trips both GCB1 and GCB2.
Gen
Engine
Mains / Network
GCB1 GCB2
Pict. 1. SPI application with control of 2 redundant breakers, according to VDE-AR-N 4105
In SPtM application there are controlled 2 redundant GCBs and 1 MCB. The breaker redundancy
requirement of the VDE-AR-N 4105 is created with the GCB breakers to ensure the gen-set is disconnected
from network and any remaining customer system as 4105 requires. Controller behaves as a NS protection
system and in case of network failure it trips both GCB1 and GCB2.
Mains / Network
Load
MCB
GCB1 GCB2
Gen
Engine
Pict. 2. SPtM application with control of 2 redundant breakers according the VDE-AR-N 4105
In complex applications, InteliMainsNT controller has to be used, MGCB application and the breaker
redundancy requirement of the VDE-AR-N 4105 is created with the MGCB breakers to ensure the standby
function of the solution. Controller behaves as a NS protection system and in case of network failure it trips
both MGCB1 and MGCB2.
Gen
Engine
Mains / Network
MCB
Load
MGCB1
Gen
Engine
GCB1
GCB2
MGCB2
Pict. 3. MINT application with control of 2 redundant breakers using InteliMains
NT
controller
