ComAp IG-NT GC User manual

Copyright © 2015 ComAp a.s.
ComAp a.s..
Kundratka 2359/17, 180 00 Praha 8, Czech Republic
Tel: [phone], Fax: [phone]
Technical support hotline: [phone]
E-mail: [e-mail], www.comap.cz
REFERENCE GUIDE
Compact Controller for Stand-by and Parallel Operating Gen-sets
Inteli New Technology
Modular Generator Controller
Multiple Internal engines application –SW configuration
SPI
IG-NT GC, IG-NTC GC, IS-NT, IG-NT-BB, IG-NTC-BB, IS-NTC-BB
Software version IGS-NT-GeCon-MARINE-3.2, July 2015

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Table of Contents
Table of Contents ...............................................................................................................................................2
General guidelines..............................................................................................................................................4
What is described in this manual? .................................................................................................................4
Dangerous voltage.........................................................................................................................................5
Adjust set points.............................................................................................................................................5
Clarification of notation...................................................................................................................................5
Available Firmware and Archive sets .................................................................................................................6
General description ............................................................................................................................................7
Description of the controller system (with all options)....................................................................................7
Comparing of IGS-NT-GeCon-MARINE 3.2 with standard gen-set fw..........................................................7
Available documentation................................................................................................................................7
Example of interconnection GeCon x Engine controller.....................................................................................9
Functions..........................................................................................................................................................11
Basic description of SPI application.............................................................................................................11
Modified setpoints ........................................................................................................................................12
Controller modes..........................................................................................................................................13
Mains parameters out of limits during synchronising...................................................................................17
Active Power control modes in SPI..............................................................................................................17
PF control modes.........................................................................................................................................18
Load shedding..............................................................................................................................................19
Test on load –SPtM.....................................................................................................................................21
Power derating.............................................................................................................................................22
Protection mode settings..............................................................................................................................22
Circuit breakers operation sequence, GCB/MCB fail detection...................................................................23
External breaker control...............................................................................................................................29
Peak shaving based on Active and Apparent power ...................................................................................29
Remote Alarm Messaging............................................................................................................................30
Variable speed support ................................................................................................................................31
Force value –step by step guide.................................................................................................................32
Values for continuous writing from external sources ...................................................................................34
User Buttons.................................................................................................................................................34
User Mask function ......................................................................................................................................35
Remote Control Function .............................................................................................................................36
Virtual Peripheral Inputs-Outputs (VPIO) module........................................................................................37
Shared Inputs and Outputs ..........................................................................................................................37
Distributed Binary Inputs and Outputs .........................................................................................................39
Modbus Reading and Writing.......................................................................................................................40
User MODBUS.............................................................................................................................................40
Modbus Switches.........................................................................................................................................41
Power Formats.............................................................................................................................................41
PLC functions...............................................................................................................................................41
Multi language support.................................................................................................................................42
ECU interface customizing...........................................................................................................................42
Volt/PF control adjustment...........................................................................................................................42
Sync/load control adjustment.......................................................................................................................44
Protections and Alarm management................................................................................................................47
Gen-set operation states..................................................................................................................................57
Inputs and Outputs ...........................................................................................................................................58
Virtual and physical modules .......................................................................................................................58
Analog outputs .............................................................................................................................................58
Setpoints...........................................................................................................................................................60
ProcessControl.............................................................................................................................................60
Basic settings...............................................................................................................................................67
Comms settings............................................................................................................................................72
Delays/Timers ..............................................................................................................................................78
Analog protect..............................................................................................................................................81

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Gener protect ...............................................................................................................................................83
Mains protect................................................................................................................................................90
AMF settings ................................................................................................................................................92
Sync/Load ctrl...............................................................................................................................................93
Volt/PF ctrl....................................................................................................................................................97
Force value...................................................................................................................................................99
Load shedding............................................................................................................................................101
Timer settings.............................................................................................................................................103
Act. calls/SMS............................................................................................................................................104
Date/Time...................................................................................................................................................107
Table of values ...............................................................................................................................................108
Group: Gener values..................................................................................................................................108
Group: Mains values ..................................................................................................................................115
Group: Sync/Load ctrl ................................................................................................................................120
Group: Volt/PF ctrl......................................................................................................................................121
Group: Force value ....................................................................................................................................121
Group: Load shedding................................................................................................................................123
Group: Analog CU......................................................................................................................................123
Group: Bin inputs CU .................................................................................................................................125
Group: Bin outputs CU...............................................................................................................................125
Group: Log Bout.........................................................................................................................................125
Group: Info .................................................................................................................................................129
Group: Statistics.........................................................................................................................................136
Table of binary input functions........................................................................................................................140
Table of analog input functions ......................................................................................................................177
Table of binary output functions .....................................................................................................................187
Controller configuration and monitoring .........................................................................................................222
Direct connection to the PC .......................................................................................................................222
GenConfig functions...................................................................................................................................222
InteliMonitor................................................................................................................................................223
Modbus protocol.........................................................................................................................................223
Value and setpoint codes...........................................................................................................................223
Technical data............................................................................................................................................223

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General guidelines
What is described in this manual?
This manual describes IGS-NT-GeCon-MARINE- „MINT“ software configuration. The Generator controller
software configuration is designed for multiple sets applications with internal load sharer and synchronizer.
What is the purpose of this manual?
This manual provides general information on how to configure and operate the controller.
This manual is intended for use by:
Operators of gen-sets/generators
Gen-set/generator control panel builders
For everybody who is concerned with installation, operation and maintenance of the gen-
set/generator
!! Warnings !!
Remote control
The IGS-NT controller can be remotely controlled. In case that maintenance needs to be done to the gen-
set, check the following to ensure that the engine cannot be started.
To be sure:
Disconnect remote control via RS232 line
Disconnect input REMOTE START/STOP
or Disconnect output STARTER and output GCB CLOSE/OPEN
The controller contains a large number of configurable setpoints, because of this it is impossible to describe
all of its functions. These are subject to change from SW version to SW version. This manual only describes
the product and is not guaranteed to be set for your application on arrival.
Text
PAGE (Capital letters in the frame) buttons on the front panel
Break Return (Italic) set points
Generator protections (Bold) Set point group
REMOTE START/STOP (Capital letters) binary inputs and outputs
Cyan background Valid for IS-NT only
Conformity declaration
Following described machine complies with the appropriate basic safety and health
requirement of the EC Low Voltage Directive No: 73/23 / EEC and EC
Electromagnetic Compatibility Directive 89/336 / EEC based on its design and type,
as brought into circulation by us.
Note:
ComAp believes that all information provided herein is correct and reliable and reserves the right to update
at any time. ComAp does not assume any responsibility for its use unless otherwise expressly undertaken.

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WARNING –VERY IMPORTANT !!!
Be aware that the binary outputs can change state during and after software
reprogramming (before the controller is used again ensure that the proper
configuration and setpoint settings are set in the controller)!!!
Be aware that gen-set can automatically or remotely start !!!
Switch the controller to SEM mode and disconnect the Binary outputs Starter and Fuel
to avoid unexpected automatic start of gen-set and GCB closing.
Clarification of notation
HINT
This type of paragraph points out details to help user installation/configuration.
NOTE:
This type of paragraph calls readers’ attention to a notice or related theme.
CAUTION!
This type of paragraph highlights a procedure, adjustment, etc. which may cause damage or improper
functioning of the equipment if not carried out correctly and may not be clear at first sight.
WARNING!
This type of paragraph indicates things, procedures, adjustments, etc. which demand a high level of
attention, otherwise personal injury or death may occur.
EXAMPLE:
This type of paragraph indicates examples of usage for illustrational purposes.
!!! CAUTION !!!
Dangerous voltage
The terminals for voltage and current measurement should never be touched.
Properly connect the grounding terminals.
Do not disconnect the CT terminals for any reason.
Adjust set points
All setpoints are preadjusted to their typical values. But the set points in the “Basic settings” settings
group !!must!! be adjusted before the first startup of the gen-set.
!!! WRONG ADJUSTMENT OF BASIC PARAMETERS
CAN DESTROY THE GEN-SET !!!
The following instructions are for qualified personnel only. To avoid personal injury do
not perform any action not specified in this User guide !!!

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Available Firmware and Archive sets
For suitable firmware for your controller please consult this table:
Firmware (*.mhx)
InteliGen NT GC
InteliGen NTC GC
InteliGen NT BaseBox
InteliGen NTC BaseBox
InteliSys NT BaseBox
InteliSys NTC BaseBox
IG-NT-GC-GeCon-MARINE-3.2
IG-NT-BB-GeCon-MARINE-3.2
IS-NT-GeCon-MARINE-3.2
Archives (*.ant)
InteliGen NT GC
InteliGen NTC GC
InteliGen NT BaseBox
InteliGen NTC BaseBox
InteliSys NT BaseBox
InteliSys NTC BaseBox
IG-GC-GeCon-MARINE -SPTM-
3.2
IG-BB-GeCon-MARINE -SPTM-
3.2
IS- GeCon-MARINE-SPTM-3.2
IG-GC-GeCon-MARINE -SPI-
3.2
IG-BB-GeCon-MARINE -SPI-3.2
IS- GeCon-MARINE-SPI-3.2
IG-GC-GeCon-MARINE -MINT-
3.2
IG-BB-GeCon-MARINE -MINT-
3.2
IS- GeCon-MARINE-MINT-3.2
IG-GC-GeCon-MARINE -
COMBI-3.2
IG-BB-GeCon-MARINE -
COMBI-3.2
IS- GeCon-MARINE-COMBI-3.2
Some features are available only in InteliGen NT Basebox, InteliGen NTC Basebox and InteliSys NT. These
features are highlighted by green background.
Features which are not available in InteliGenNT GC controller:
User MODBUS
Distributed Binary Inputs and Outputs

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General description
Description of the controller system (with all options)
NT Family controllers are comprehensive AMF-controllers for single and multiple generating sets operating
in stand-by or parallel modes. A modular construction allows upgrades to different levels of complexity in
order to provide the best solution for various customer applications.
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* (* sw GeCon opens GCB only, not stops the engine) on external signal or by pressing
push buttons.
Parallel to the Mains operation is a standard feature. Isolated parallel and Power Management System
support are optional. Forward and reverse synchronizing, Generator protections, Mains protection including
vector shift, load and power factor control are the major functions provided. Interfacing to foreign
synchronizers and load sharers is supported.
The key feature of the controller is its easy-to-use operation and installation. Predefined configurations for
typical applications are available as well as user-defined configurations for special applications.
Comparing of IGS-NT-GeCon-MARINE 3.2 with standard gen-set fw
GeCon does not take care of Engine control
GeCon accepts in SEM mode external control of GCB and Engine
GeCon can control the engine via Binary start/stop output signals only –see below. The independent Engine
controller (e.g. ID-DCU) is expected.
Synchronizing and unloading timeouts can be disabled by setpoint setting (or Force value function)
All regulations (load, VAr sharing, frequency, voltage) can be disabled by setpoint change or by Force value.
Interface GeCon to engine controller is provided by I/O wires no by communication line.
Available documentation
PDF FILE
DESCRIPTION
IGS-NT & ID-DCU Accessory Modules 02-
2015.pdf
Thorough description of accessory modules for IGS-NT
family, technical data, information about installation of the
modules, how to connect them to controller and set them
properly.
IGS-NT Troubleshooting Guide 08-2014.pdf
How to solve most common troubles with InteliGen NT and
InteliSys NT controllers. Including the list of alarm massages.
IGS-NT Communication Guide 09-2014.pdf
Communication guide for IG/IS-NT controllers. It contains
information how to connect control unit and all
communication features descriptions
IGS-NT Installation Guide 08-2014.pdf
Installation guide for IG/IS-NT controllers. It contains
technical information about controler and extension modules
IGS-NT Application Guide 05-2013.pdf
Application guide for IG/IS-NT controllers. It refers to
application and typical installation settings and sites
structures

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IGS-NT Operator Guide 01-2014.pdf
Operator guide for IG/IS-NT

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Example of interconnection
GeCon x Engine controller
Schematic wiring:
Important signals/ interconnections:
From GeCon side:
BO: Start pulse, Stop pulse - for sending Start and Stop signals
Speed control (during synchronisation, regulation):
BO: Speed Up, Speed Down or Aout SG out

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BI: ReadyToLoad –signal from Engine unit –it means that Engine is ready (speed is ok, no 2nd level
alarms) and can be loaded.
Other signals:
- Information about Warnings / SD in one unit can be sent to second unit.
- ECU –in case of Ecu communicating via CAN bus J1939 –GeCon can be connected to CAN1 for
showing ECU values on the display
- Interconnection on CAN2:
oFor Time and Date synchronisation only- in case of IGS-NT and ID-DCU
oIn case of connection IB-NT or I-LB+ - you can monitor both kind of units (IGS-NT, ID-DCU)
oIn case of connection display –you can switch between both kind of units (IGS-NT, ID-DCU)

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Functions
Basic description of SPI application
The SPI application is intended for single gen-sets and includes following main features:
Automatic startup and stop sequences with adjustable timing
Wide range of generator and engine protections, additional freely configurable protections
Parallel to the mains operation, many different load control modes (baseload, import/export control
and other)
Island operation
Integrated mains protection (mains decoupling relay) including vector shift
One breaker control (GCB) including synchronizing
MCB position sensing
Soft loading and unloading

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Modified setpoints
Below mentioned are GeCon specific setpoints only.
Group
Setpoint
Option
Function
Process control
StartStopBtn
ENABLED
DISABLED
Standard panel Start/Stop buttons function.
Panel Start/Stop buttons are disabled.
ProtectionMode
ACTIVE
NOT ACTIVE
ACTIVE:
2-nd level protections are evaluated, GCB
or MCB is controlled.
NOT ACTIVE:
2-nd level protections are evaluated, GCB
or MCB is NOT opened.
Exceptions are Emerg Stop and alarms
types Sdoverride.
Sync/Load ctrl
Sync timeout
1-1800s
NO TIMEOUT
Standard MINT function.
Unlimited synchronizing time.
GCB open level
1-100%
NO LEVEL
Standard MINT function.
No generator power open level detection.
GCB open del
1-1800s
NO TIMEOUT
Standard MINT function.
Unlimited unloading procedure.
Hint:
All above mentioned setpoints can be Forced by Binary input(s) to another value (or switched between
ENABLED and DISABLED).
Based on setpoint settings there are three possible operational modes HAND –SEM - AUT:
“HAND”
SEM
AUT
Basic setting
ControllerMode
SEM
SEM
AUT
Process control
StartStopBtn
DISABLED
ENABLED
ENABLED
ProtectionMode
NOT ACTIVE
/ACTIVE
ACTIVE
ACTIVE
Sync/Load ctrl
Sync timeout
NO TIMEOUT
1-1800s
1-1800s
GCB open level
NO LEVEL
1-100%
1-100%
GCB open del
NO TIMEOUT
1-1800s
1-1800s
Hint:
It is possible to configure (Force value) “HAND” – SEM switching via Binary input.

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Controller modes
OFF mode
Use OFF mode to block controller functions (even if is power on). OFF mode is used for controller firmware
or configuration change.
Binary outputs (e.g. GCB CLOSE/OPEN) are not energized, all closed Binary outputs are opened when
controller is switched to OFF mode.
Gen-set cannot be started and operated from IGS-NT-GeCon controller –no response for panel buttons and
Binary input commands.
Hint:
Switching to OFF mode is blocked on running engine to avoid accidental engine stop by mode change or by
firmware or configuration programming.

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SEM mode
Engine start can be activated from
oEngine controller (e.g. ID-DCU, ID-MCU)
oGeCon panel –Start button
oGeCon BI: StartButton
oRemotely e.g. from InteliMonitor
GeCon BI: ReadyToLoad initiates GeCon “Running” state” - activates Gener protect: Min stab time a Max
stab time within the generator electric protections are activated.
Gen-set is loaded/unloaded from
oGeCon panel –GCB button
oGeCon BI: GCBButton
oDirect GCB “hand” control
oRemotely e.g. from InteliMonitor
oLBI: Gen unload
GCB closing from controller can be blocked by BI: GCB disable (does not block synchronization process)
Controller flow chart in SEM mode:

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HAND mode
Hand mode is a special type of SEM mode. In Hand mode, the panel Start, Stop buttons are not working,
GCB is supposed to be controlled externally. The Hand mode is achieved by setpoints adjustment - see the
following picture.
IG-EE GeCon
MINT
MCU
GCB feedback GCB
close/open
Vg, Ig, Vb
RS232 - PC
Speed control
(Sync/Load ctrl)
GCB START STOP
(ReadyToLoad) GG
External Engine
Start / Stop
External GCB
Close / Open
generator
measuring
Process control: StartStopBtn = DISABLED
ProtectionMode = NOT ACTIVE
Sync/Load ctrl: Sync timeout = NO TIMEOUT
GCB open level = NO LEVEL
GCB open del = NO TIMEOUT
MCU

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AUT mode
Automatic mode is influenced by ProcessControl: Island enable, ParallelEnable, Synchro enable setpoints.
No.
Island enable
Parallel enable
Synchro enable
Function
1
YES
YES
FORWARD
Basic SPI application
2
YES
NO
NO
SPM application
3
NO
YES
FORWARD
SPI application, no island (stand-by) operation
allowed
4
NO
NO
NO
Gen-set start is blocked. Binary output
StartBlocked indicates those states.
NO
NO
FORWARD
NO
YES
NO
Following procedure corresponds to setting No.1 from table above.
1) After the input Rem start/stop is energized, controller starts the gen-set. If MCB feedack is active, the
controller will synchronize the gen-set to mains and ramp up the load, depending on the ProcessControl
set points adjustment.
2) If a mains failure is recognized, the controller will open the GCB to separate the failed mains from the
generator. After the mains breaker has been open (MCB feedback is de-energized), the controller will
close the GCB again to the island (stand-by) operation.
3) If mains recovers again, the GCB is open again to allow the MCB to be closed (manually or in general
not with a command from the controller). After both mains is present and MCB closed, the controller will
synchronize again with the healthy mains and close the GCB.
4) If input Rem start/stop is de-energized, controller will softly unload the gen-set back to the mains, then
open the GCB, cool down and stop the gen-set.
TEST mode
Use TEST mode for Gen-set start test if the Mains is OK or to transfer the load to the gen-set when Mains
fail is announced in advance.
HINT
The controller does not respond to GCB ON/OFF , STOP, START in Return To mains = ENABLED.
Gen-set automatically starts, when TEST mode is selected.

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Mains parameters out of limits during synchronising
In case that mains parameters get out of permitted limits during synchronizing to mains (reverse or forward),
the regulation of gen-set speed and voltage according to mains frequency and voltage is interrupted. During
the state, when parameters reach out of limits, until “Mains fail” is issued, the engine speed and voltage
regulation output is kept on the last value.
Active Power control modes in SPI
ProcessControl: Load ctrl PtM
Mode
Function
Related Setpoints –LBI –LBO - LAI
BASELOAD
Gen-set power is regulated to value
given by Base load setpoint.
ProcessControl:Base load
IM/EX
Gen-set load is controlled so, that the
mains import is maintained constant at
the level given by Import load setpoint –
I/E power is measured by controller on
auxiliary CT input or by analog input.
ProcessControl: Import load, I/E Pm-
meas
ANEXT BASELOAD
Gen-set power is set by analog input.
Analog input: LdCtrlAnextBld
ANEXT IM/EX
Gen-set load is controlled so, that the
mains import is maintained constant at
the level given by the analog input
LdCtrl:AnExI/E –I/E power is measured
by controller on auxiliary CT input or by
analog input.
ProcessControl:I/E Pm-meas, Analog
input: PFCtrl:AnExI/E
T BY PWR
Gen-set power is controlled to keep the
required temperature, that is measured
via an analog input.
ProcessControl: TempByPwr Treq,
TempByPwr gain, TempByPwr int,
Analog input: LdCtrl:TByPwr
Another modes of active power control
Mode
Function
Related Setpoints –LBI –LBO - LAI
Export limit
Limits export to the mains in the
baseload mode. If the function is
enabled, the gen-set power is limited so
that mains import is always higher or
equal to the setpoint Import Load.
ProcessControl: Export limit = ENABLE,
Import load
Warming
The controller limits gen-set power for
requested time or until the water
temperature reach the requested value.
After warming the gen-set goes to the
requested (e.g. Baseload) power.
ProcessControl: Warming load;
Warming temp; Max warm time
Peak shaving
Automatic gen-set start/stop based on
object (load) consumption. Can be
based on measured kW or kVA.
ProcessControl: PeakLevelStart;
PeakLevelStop; PeakAutS/S del, Peak
kVA Start, Peak kVA Stop, PeakKVAS/S
del, LBO: PeakShaveAct

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Requested power
Actual power
Vgen
Igen
SpeedGoverrnor
output
Speed
governor
ProcessControl: Load ctrl PtM = ANEXT BASELOAD
LOAD
GCBMCB
Controller
LdCtrl:AnExtBld
Analog input:
Requested power
Actual power
ProcessControl: Baseload
Vgen
Igen
SpeedGoverrnor
output
Speed
governor
ProcessControl: Load ctrl PtM = BASELOAD
LOAD
GCBMCB
Controller
SpeedGoverrnor
output
Speed
governor
LOAD
GCBMCB
Controller
LdCtrl:I/E-Pm
Analog input: Vmains
Imns 3
LoadCtrlPtm = IM / EX
I / E- Pm meas =
ANALOG INPUT
ProcessControl :
ProcessControl :
ProcessControl : IM/EX
Requested I/E power
Actual I/E power
SpeedGoverrnor
output
Speed
governor
LoadCtrlPtm= IM / EX
LOAD
GCBMCB
Controller
Vmains
Imains ph3
ProcessControl : IM/EX
ProcessControl : I/E - Pm meas = IM3 CT INPUT
ProcessControl :
Requested I/E power
Actual I/ E power
PF control modes
ProcCtrlSingle: PF ctrl PtM
Mode
Function
Setpoints
BASEPF
Gen-set power factor is maintained at
constant level adjusted by the setpoint
Base PF.
ProcCtrlSingle: PF ctrl PtM
PF-IM/EX
Gen-set power factor is controlled so, that the
mains power factor is maintained constant at
the level adjusted by setpoint Import PF
ProcCtrlSingle: Import PF,
I/E Qm-meas
ANEXT BASEPF
Gen-set power factor is maintained at
constant level given by the analog input
PFCtrl:AnExBPF
Analog input: PFCtrl:AnExBPF
ANEXT PF-IM/EX
Gen-set load is controlled so, that the mains
power factor is maintained constant at the
level given by the analog input PFCtrl:AnExI/E
–I/E power factor is measured by controller
on auxiliary CT input or by analog input.
ProcCtrlSingle: I/E Qm-meas
Analog input: PFCtrl:AnExI/E

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Requested PF
Actual PF
ProcessControl: Base PF
Vgen
Igen
AVRi output
AVR
ProcessControl: PF ctrl PtM = BASEPF
LOAD
GCBMCB
Controller
IG-AVRi
ProcessControl : Import PF
AVR
ProcessControl :
ProcessControl :
LOAD
GCBMCB
Controller
IG-AVRi
Vmains
Imains ph3
PF ctrl PtM = PF IM / EX
Actual I/ E PF
Requested I /E PF
I / E - Qm meas = IM 3 CT INPUT
AVRi output
Import PF
AVRi output
AVR
LOAD
GCBMCB
Controller
IG-AVRi
PfCtrl:I/E-Qm
Analog input: Vmains
Imns 3
Actual I/E PF
Requested I/E PF
PF ctrl PtM = PF IM/EX ProcessControl :
ProcessControl :
ProcessControl : I/E- Qm meas = ANALOG INPUT
Load shedding
Load shedding function is dedicated for tripping of non-essential load in case of high generator current, or
drop of generator frequency above/below preadjusted limits, for preadjusted time.
All LOAD SHED outputs are activated (closed) to trip the unessential load when gen-set goes to island:
a) When GCB is closed after mains fail and gen-set starts in AUT mode.
b) When MCB opens from parallel to mains operation in AUT mode.
c) Before MCB is opened in SEM mode by button.
The load shedding function is active in all controller modes except OFF and MAN.
Load shedding has ten steps and each step is linked with its own Load shed x binary output. The non
essential load shedding is based on generator current and generator frequency. There is only one level for
current load shedding and one level for frequency load shedding for all 10 steps, as well for reconnection
level and delay. Load shed can only move from one step to the next, e.g. No LoadShed to LdShed S1 to
LdShed S2 to LdShed S10 and vice versa.
If manual reconnection of the load is desired, the AutoLd recon setpoint needs to be disabled (AutoLd recon
=DISABLED) and the MAN load recon binary input needs to be configured.
Rising edge on this input resets the controller to a lower stage, but only if the load is under the Ld recon level
at that moment.
The current load shedding can be activated in case any of phase current exceeds the adjusted limit. The
reconnection is able only in case all of the current values are below reconnection level.

Inteli NT GeCon-MARINE SPI, SW Version 3.2, ©ComAp –July 2015
IGS-NT-GeCon-MARINE-SPI-3.2.PDF
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CurShedLev
CurRecLev
FreqShedLvl
FreqRecLvl
LdShed stage 1
LdShed stage 2
LdShed stage 10
ManualLdRecon
Load shedding:
Ld Shed delay
Ld recon delay
Hint:
If no Load Shedding outputs are configured, there is no record to history and no screen timer indication of
the activity of this function.
On the following pictures, the generator current load shedding is depicted. The current is evaluated from all 3
phases, each phase can activate the load shedding. On the picture, due to transparency, only 3 load shed
outputs are depicted, not all 10.
The generator frequency based load shedding is in fact the same, but fall below preadjusted limit is watched,
instead of exceeding of the limit as in case of current load shedding.
Ld shed
del Ld shed
del Ld shed
del
BO Load shed 1
BO Load shed 2
BO Load shed 3
Curr shed level
Gen-set current
closed
closed
closed
Load reconnection –automatic -> AutoLd recon = ENABLED
Ld recon del Ld recon delLd recon del
BO Load shed 2
Curr recon level
Gen-set current
BO Load shed 3
BO Load shed 1
opened
opened
opened
Load reconnection –manual -> AutoLd recon = DISABLED