ComAp InteliGen NT

InteliGen
NT
, InteliSys
NT
, InteliMains
NT
– Troubleshooting Guide,
SW version IGS-NT-3.1.0, IM-NT-3.1.0, ©ComAp – August 2018 34
IGS-NT Troubleshooting Guide.pdf
IGS-NT Alarm/History
record
Alarm/
History
Appeara
nce
Description
generator current transformers (CT’s) are connected in a
wrong way.
20
MP L1, L2 or L3 under
A+H
Mains L1, L2 or L3 voltage was under the Mains <V MP
limit for Mains V del time. Undervoltage protections are
based on Mains protect: Mains <V MP and Mains 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.
MP L1, L2 or L3 over
A+H
Mains L1, L2 or L3 voltage was over the Mains >V MP
limit for Mains V del time. Overvoltage protections are
based on Mains protect: Mains >V MP and Mains 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.
MP L12, L23 or L31 under
A+H
Mains L12, L23 or L31 voltage was under the Mains <V
MP limit for Mains V del time. Undervoltage protections are
based on Mains protect: Mains <V MP and Mains 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.
MP L12, L23 or L31 over
A+H
Mains L12, L23 or L31 voltage was over the Mains >V MP
limit for Mains V del time. Overvoltage protections are
based on Mains protect: Mains >V MP and Mains 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.
Mains Avg x >V
A+H
If the value of 10 min. average mains voltage of any phase
(Mains Avg V1, Mains Avg V2, Mains Avg V3) exceed
value given by setpoint Mains Avg >V MP (Mains protect
group) the MCB is opened and message Mains Avg x >V
appears in alarm list and history record. BO Common MP
is activated (x indicates number of phase).
MP fmns under
A+H
Mains frequency was under the Mains <f limit for Mains f
del time. Under frequency protection is based on Mains
protect: Mains <f and Mains f del setpoints.
MP fmns over
A+H
Mains frequency was over the Mains >f limit for Mains f del
time. Over frequency protection is based on Mains
protect: Mains >f and Mains f del setpoints.
ROCOF
H
If measured value of df/dt (mains frequency) exceed
ROCOF df/dt (setpoint in Mains protect group), ROCOF
protection is activated. ROCOF protection trips mains
circuit breaker (MCB). The message ROCOF is writen in
history of controller. Value of df/dt is evaluated from mains
voltage.
BusL L1, L2 or L3 under
H
Left bus L1,L2 or L3 voltage was under the BusLeft <V
limit for the BusLeft V del time. Information about that is
recorded into controller history.
Setpoint BusL protect: BusL Volt prot has to be set to
ENABLED if healthy bus voltage detection and history
record are requested. Voltage has to be over the BusLeft
<V limit if BTB synchronisation should be started, because
the BusLeft <V setpoint is used for healthy bus detection
(this condition applies only if BusL Volt prot is set to
ENABLED).
This alarm is issued if voltage protections are based on