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
MINT
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
Modified setpoints ........................................................................................................................................11
Controller modes..........................................................................................................................................12
Power management.....................................................................................................................................16
DeadBusStart function.................................................................................................................................20
Load shedding..............................................................................................................................................20
DROOP........................................................................................................................................................22
Protection mode settings..............................................................................................................................24
External breaker control...............................................................................................................................24
Heavy consumers support ...........................................................................................................................25
Variable speed support ................................................................................................................................26
Force value –step by step guide.................................................................................................................27
Values for continuous writing from external sources ...................................................................................29
User Buttons.................................................................................................................................................29
User Mask function ......................................................................................................................................30
Remote Control Function .............................................................................................................................31
Virtual Peripheral Inputs-Outputs (VPIO) module........................................................................................32
Shared Inputs and Outputs ..........................................................................................................................32
Distributed Binary Inputs and Outputs .........................................................................................................34
Modbus Reading and Writing.......................................................................................................................35
User MODBUS.............................................................................................................................................35
Modbus Switches.........................................................................................................................................36
Power Formats.............................................................................................................................................36
PLC functions...............................................................................................................................................36
Multi language support.................................................................................................................................37
ECU interface customizing...........................................................................................................................37
Volt/PF control adjustment...........................................................................................................................37
Sync/load control adjustment.......................................................................................................................39
Protections and Alarm management................................................................................................................40
Gen-set operation states..................................................................................................................................47
SynchroScope mode........................................................................................................................................48
Inputs and Outputs ...........................................................................................................................................49
Virtual and physical modules .......................................................................................................................49
Analog outputs .............................................................................................................................................49
Setpoints...........................................................................................................................................................51
ProcessControl.............................................................................................................................................51
Basic settings...............................................................................................................................................57
Delays/Timers ..............................................................................................................................................68
Analog protect..............................................................................................................................................71
Gener protect ...............................................................................................................................................72
Pwr management.........................................................................................................................................79
HeavyConsumers.........................................................................................................................................84
Sync/Load ctrl...............................................................................................................................................84
Sync/load control adjustment.......................................................................................................................84

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Volt/PF ctrl....................................................................................................................................................89
Force value...................................................................................................................................................91
Load shedding..............................................................................................................................................92
Timer settings...............................................................................................................................................94
Act. calls/SMS..............................................................................................................................................94
Date/Time.....................................................................................................................................................96
Table of values .................................................................................................................................................98
Group: Engine values...................................................................................................................................98
Group: Gener values....................................................................................................................................99
Group: Bus values......................................................................................................................................106
Group: Power management.......................................................................................................................109
Group: Sync/Load ctrl ................................................................................................................................112
Group: Volt/PF ctrl......................................................................................................................................114
Group: Force value ....................................................................................................................................114
Group: Load shedding................................................................................................................................116
Group: Analog CU......................................................................................................................................116
Group: Bin inputs CU .................................................................................................................................117
Group: Bin outputs CU...............................................................................................................................118
Group: Log Bout.........................................................................................................................................118
Group: Info .................................................................................................................................................122
Group: Statistics.........................................................................................................................................128
Table of binary input functions........................................................................................................................133
HeavyConsumers.......................................................................................................................................174
Table of analog input functions ......................................................................................................................175
Table of binary output functions .....................................................................................................................184
Controller configuration and monitoring .........................................................................................................221
Direct connection to the PC .......................................................................................................................221
GenConfig functions...................................................................................................................................221
InteliMonitor................................................................................................................................................222
Modbus protocol.........................................................................................................................................222
Value and setpoint codes...........................................................................................................................222
Technical data............................................................................................................................................222

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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
For the IGS-NT-GeCon-MARINE is possible to use IGS-NT-LSM+PMS or IGS-NT-GeCon-LSM+PMS dongle
which enables the Load sharing and Power management functions. (both types of dongles have the same
function)
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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MAN mode
In MANual mode, the controller evaluates configured protections only(when LBI:ReadyToLoad=1 only). All
regulation loops are disabled, not active. Controller’s state changes based on sensed signals ReadyToLoad
and GCB feedback. In case of some active protection, this is signalized by appropriate binary outputs.
Engine cannot be started from GeCon, GeCon cannot close the GCB, etc..,only opens GCB in cause SD
alarm and Setpoint:Protection mode:ACTIVE.
Controller flow chart in MAN mode
Stopped
Running
Loaded
BI:ReadyToLoad BI:GCB feedback active
BI:GCB feedback
not active
BI:ReadyTo
Load - deact
BI:ReadyTo
Load - deact
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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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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AUT mode
Engine start or Power management is activated from GeCon BI: Sys start/stop
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 starts synchronizing and is loaded/unloaded automatically based on
oPower management setting
oGeCon BI: Sys start/stop
GeCon will stop engine started from engine controller when BI Sys start/stop or due to Power
management function.
Controller flow chart in AUT mode:

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Power management
Automatic gen-set start / stop function based on load changes and/or Running hours or Generator size.
Following functions are available:
Power management in kW
Guarantees adjustable load reserve (load step) in kW. Suitable for load demand-based optimization.
Activation: #Pwr mgmt mode = ABS (kW)
Power management in kVA
Guarantees adjustable load reserve (load step) in kVA. Suitable for generator- or busbar dimensioning-
based optimization.
Activation: #Pwr mgmt mode = ABS (kVA)
Relative power management in %
Guarantees that the engines will be not continuously loaded more than to a certain level, leaving less than
selected relative load reserve. Suitable for engine life-based optimization.
Activation: #Pwr mgmt mode = REL (%)

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Start/Stop conditions in Power management
Reserve
Actual Reserve
Start condition
Stop condition
Absolute
kW / kVA
ARstrt = ΣPgNom –ΣPgAct
ARstp = ΣPg*Nom –ΣPgAct
ARstrt < #LdResStrt
ARstp > #LdResStp
Relative
%
RRstrt = (ΣPgNom –ΣPgAct) / ΣPgNom
RRstp = (ΣPg*Nom –ΣPgAct) / ΣPg*Nom
RRstrt < #%LdResStrt
RRstp > #%LdResStp
Where
ARstrt
Actual Absolute reserve in kW or kVA - for engine start calculation.
ARstp
Actual Absolute reserves in kW or kVA - for engine stop calculation.
RRstrt
Actual Relative reserve in % - for engine start calculation.
RRstp
Actual Relative reserves in % - for engine stop calculation.
ΣPgNom
Sum of Nominal power of all gen-sets on the bus.
ΣPg*Nom
Sum of Nominal power of all gen-sets on the bus apart of the one, which is going to be stopped.
ΣPgAct
Sum of Actual power of all gen-sets on the bus = system load.
Hint:
Optional functions in absolute or relative Power management are:
- Running hours balancing (equalization),
- Load demand (different size) engines swap and

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- Power management of two or more gen-set groups (bus tie support).
CAUTION!
The function of the controller is designed to handle the maximum sum of nominal power at 32000kW
(3200.0kW, 320.00MW depending on the power format in the controller). If the sum of nominal power of all
gen-sets connected to the intercontroller CAN exceeds these values the power format needs to be changed
accordingly.
Example: There are 20 gen-sets each with 2000kW of nominal power. The sum of the nominal power is
40000kW. Therefore the power format in kW cannot be used because the sum exceeds 32767. Therefore
power format in MW needs to be chosen because the sum in MW is 40MW (it does not exceeds 320.00MW).
Running hours balancing
The gen-sets priorities are automatically swapped to balance engine running hours. Up to 32 controllers are
supported.
Activation: #PriorAutoSwap = RUN HOURS EQU
Important setpoints: RunHoursBase , #RunHrsMaxDiff
G1 G2 G3
LOAD
1.controller 2.controller 3.controller
Basic settings:
Contr.addr = 1
Pwr management:
#Pwr mgmt mode = RUN HOURS EQU
Priority ctrl = MASTER
RunHoursBase = 100 h
#RunHrsMaxDiff = 10 h
Control group = COMMON
Basic settings:
Contr.addr = 2
Pwr management:
#Pwr mgmt mode = RUN HOURS EQU
Priority ctrl = SLAVE
RunHoursBase = 200 h
#RunHrsMaxDiff = 10 h
Control group = COMMON
Basic settings:
Contr.addr = 3
Pwr management:
#Pwr mgmt mode = RUN HOURS EQU
Priority ctrl = SLAVE
RunHoursBase = 300 h
#RunHrsMaxDiff = 10 h
Control group = COMMON
Different sized engines (Load demand) swap
Three running engines (priorities) are swapped based on load demand (one “small” engine runs on “small”
load and swaps to another one “big” engine that runs when load increases).
Activation: #PriorAutoSwap = LD DEMAND SWAP
Important setpoints: #PwrBandContr1, #PwrBandContr2, #PwrBandContr3, #PwrBandContr4,
#PwrBandChngDe.

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G1 G2 G3
LOAD
1.controller 2.controller 3.controller
Basic settings:
Contr.addr = 1
Pwr management:
#Pwr mgmt mode = LD DEMAND SWAP
Priority ctrl = MASTER
#PwrBandContr1 = 1
#PwrBandContr2 = 2
#PwrBandContr3 = 2+3
#PwrBandChngDe = 10 s
Control group = COMMON
Basic settings:
Contr.addr = 2
Pwr management:
#Pwr mgmt mode = LD DEMAND SWAP
Priority ctrl = SLAVE
#PwrBandContr1 = 1
#PwrBandContr2 = 2
#PwrBandContr3 = 2+3
#PwrBandChngDe = 10 s
Control group = COMMON
Basic settings:
Contr.addr = 3
Pwr management:
#Pwr mgmt mode = LD DEMAND SWAP
Priority ctrl = SLAVE
#PwrBandContr1 = 1
#PwrBandContr2 = 2
#PwrBandContr3 = 2+3
#PwrBandChngDe = 10 s
Control group = COMMON
Pwr management of splitted group
Important setpoints: Control group, GroupLinkLeft, GroupLinkRight
When a Bus-tie disconnects the gen-set group the Power management and Load and Var share can operate
separately on each of them.
To enable the independent Pwr management, Load and Var sharing between the gensets, group of gensets
splitted by bus tie breaker, configure the setpoints as depicted on this picture.
G1 G2 G3 G4 G5
LOAD1 LOAD 2
Basic settings:
Contr.addr = 1
Pwr management:
Control group = 1
GroupLinkLeft = 1
GroupLinkRight = 2
BTB
BI Group link
1.controller 2.controller 3.controller 4.controller 5.controller
Basic settings:
Contr.addr = 2
Pwr management:
Control group = 1
GroupLinkLeft = C
GroupLinkRight = C
Basic settings:
Contr.addr = 3
Pwr management:
Control group = 2
GroupLinkLeft = C
GroupLinkRight = C
Basic settings:
Contr.addr = 4
Pwr management:
Control group = 2
GroupLinkLeft = C
GroupLinkRight = C
Basic settings:
Contr.addr = 5
Pwr management:
Control group = 2
GroupLinkLeft = C
GroupLinkRight = C
Control group 2.
Control group 1.
BTB feedback

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DeadBusStart function
Function is determined for emergency incident - blackout on the power bus –on the ship.
Function is controlled by this setpoints/signals:
Setpoint:DeadBusStrt [ ENABLED / DISABLED ]
Setpoint:DeadBusST del [ 0…600s ]
LBO: DeadBusStart
Alarm: DeadBusStart
Description:
When controler detects no voltage (any bus phase voltage is below 15 VAC) on the bus for the time
„DeadBusSTdel”, then this function activates local start command, starts the gen-set, and connects it to the
bus.
When the function Dead Bus Start is evaluated, LBO:Dead Bus Start is activated.
When LBO:Dead Bus Start=1 then Power management system is internally DEACTIVATED –all gen-
sets with active LBO:DeadBusStart are started and connected to the bus (and run in loadsharing).
Activation and deactivation of this function is written to the history.
For deactivation of this function is necessary to switch to SEM mode and confirm the DeadBusStart alarm.
DeadBusStart function works in AUT mode only.
Function is available in MINT aplication.
Load shedding
Load shedding fiction 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.
CurShedLev
CurRecLev
FreqShedLvl
FreqRecLvl
LdShed stage 1
LdShed stage 2
LdShed stage 10
ManualLdRecon
Load shedding:
Ld Shed delay
Ld recon delay
Hint: