InteliGen
NT
, InteliSys
NT
, InteliMains
NT
– Troubleshooting Guide,
SW version IGS-NT-3.1.0, IM-NT-3.1.0, ©ComAp
– August 2018
37
IGS-NT Troubleshooting Guide.pdf
IGS-NT Alarm/History
record
Alarm/
History
Appeara
nce
Description
to neutral voltages. It means that
Basic settings
:
FixVoltProtSel
is set to PHASE-NEUTRAL.
Vb L1, L2 or L3 over
H
Bus L1, L2 or L3 voltage was over the
Bus > Hst
limit for
Bus V del
time
.
Overvoltage protections are based on
Bus
protect
:
Bus > Hst
and
Bus V del
setpoints. This alarm is
issued if voltage protections are based on phase to neutral
voltages. It means that
Basic settings
:
FixVoltProtSel
is
set to PHASE-NEUTRAL.
Vb L12, L23 or L31 under
H
Bus L12, L23 or L31 voltage was under the
Bus < Hst
limit
for
Bus V del
time
.
Undervoltage protections are based on
Bus protect
:
Bus < Hst
and
Bus V del
setpoints. This
alarm is issued if voltage protections are based on phase
to phase voltages. It means that
Basic settings
:
FixVoltProtSel
is set to PHASE-PHASE.
Vb L12, L23 or L31 under
H
Bus L12, L23 or L31 voltage was over the
Bus > Hst
limit
for
Bus V del
time
.
Overvoltage protections are based on
Bus protect
:
Bus > Hst
and
Bus V del
setpoints. This
alarm is issued if voltage protections are based on phase
to phase voltages. It means that
Basic settings
:
FixVoltProtSel
is set to PHASE-PHASE.
f bus under
H
Bus frequency was under the
Bus <f
limit for
Bus f del
time
.
Under frequency protection is based on
Bus protect
:
Bus <f
and
Bus f del
setpoints.
f bus over
H
Bus frequency was over the
Bus >f
limit for
Bus f del
time
.
Over frequency protection is based on
Bus protect
:
Bus >f
and
Bus f del
setpoints.
Bus meas error
A+H
Bus measurement error is issued if bus voltage is out of
limits. For details see description of the
Gener
protect
:
BusMeasError
setpoint in IGS-NT-x.y-Reference
Guide.
OfL StartBlck
A+H
This alarm indicates wrong setpoints setting that disables
engine start or load takeover. Incorrect combination of
ProcessControl
:
Island enable; ParallelEnable; Synchro
enable; MF start enable
setpoints setting is the reason why
this alarm is issued.
See
AUT mode
section of the
OFF-MAN-AUT mode
chapter in IGS-NT-x.y-Reference Guide for SPTM, SPI or
COMBI application.
OperConflict
A
Alarm alerts to conflict of settings required behavior.
It can occur in these cases:
-
Function MF (MainsFail) want to start gen-set(s),
but Insland mode is Disabled (in AUT or TEST
mode)
-
Parallel and Island mode are Disabled (in other
mode than OFF)
-
Parallel is Enabled, but Synchronisation is
Disabled (NONE) - in AUT mode
This alarm indication is implemented in IGS/M-NT 3.1 and
higher. (it replaces alarm
“OfL StartBlck”)
StartBlck
A+H
This alarm indicates wrong setpoints setting that disables
start
of
gensets.
Incorrect
combination
of
ProcessControl
:
Island enable; ParallelEnable; Synchro
enable; MF start enable
setpoints setting is the reason why
this alarm is issued.
See
OFF-MAN-AUT mode
chapter in IM-NT-MCB-MGCB