Sel C6200 FlexGen Instruction sheet

C6200 FlexGen GENCONTROLLER
Configuration Manual
SELCO
Betonvej 11 - DK-4000 Roskilde
Denmark
Phone: [phone] - Fax: [phone]
e-mail: [email protected]
Web site: www.selco.com

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Table of Contents
1Preface....................................................................................................................................7
2System Preparation..................................................................................................................8
2.1 CAN Bus Address...............................................................................................................8
3Auxiliary Commands ..............................................................................................................9
3.1.1 Read Measurements.........................................................................................................9
3.1.2 Read PMS .......................................................................................................................9
3.1.3 Read Alarms....................................................................................................................9
3.1.4 Read Configuration .........................................................................................................9
3.1.5 Read Event Log...............................................................................................................9
3.1.6 Set the date......................................................................................................................9
3.1.7 Set the time....................................................................................................................10
3.1.8 Enable Configuration Write mode .................................................................................10
3.1.9 Disable Configuration Write mode ................................................................................10
3.1.10 Enable Service mode .................................................................................................10
3.1.11 Service Parameters.....................................................................................................10
3.1.12 Change of RS232 PIN................................................................................................11
3.1.13 Change Service PIN...................................................................................................11
4Configuration........................................................................................................................12
4.1 Protection..........................................................................................................................12
4.1.1 Short Circuit Trip ..........................................................................................................12
4.1.2 Over Current Trip..........................................................................................................13
4.1.3 Overload........................................................................................................................13
4.1.3.1 Active Phase Load......................................................................................................................... 13
4.1.4 Voltage Protection.........................................................................................................14
4.1.4.1 Under Voltage Trip........................................................................................................................ 15
4.1.4.2 Over Voltage Trip.......................................................................................................................... 15
4.1.5 Frequency Protection.....................................................................................................16
4.1.5.1 Under Frequency Trip.................................................................................................................... 16
4.1.5.2 Over Frequency Trip...................................................................................................................... 17
4.1.6 Reverse Power Trip .......................................................................................................17
4.1.7 Excitation Loss Trip ......................................................................................................18
4.1.8 Frequency Deviation Protection.....................................................................................19
4.1.9 Vector Shift Protection ..................................................................................................20
4.2 Alarms ..............................................................................................................................21
4.2.1 Over Current Alarm.......................................................................................................21
4.2.2 Overload........................................................................................................................21
4.2.2.1 Active Phase Load......................................................................................................................... 22
4.2.3 Voltage Alarm...............................................................................................................22
4.2.4 Prestart in case of voltage alarms...................................................................................22
4.2.4.1 Under Voltage Alarm..................................................................................................................... 23
4.2.4.2 Pre-start of standby generator in case of under voltage alarm.......................................................... 23
4.2.4.3 Over Voltage Alarm....................................................................................................................... 23
4.2.4.4 Pre-start of standby generator in case of over voltage alarm............................................................ 23
4.2.5 Frequency Alarm...........................................................................................................24
4.2.6 Prestart in case of frequency alarms...............................................................................24

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4.2.6.1 Under Frequency Alarm................................................................................................................. 24
4.2.6.2 Pre-start of standby generator in case of under frequency alarm...................................................... 24
4.2.6.3 Over Frequency Alarm................................................................................................................... 25
4.2.6.4 Pre-start of standby generator in case of over frequency alarm........................................................ 25
4.2.7 Reverse Power Alarm....................................................................................................25
4.2.8 Excitation Loss Alarm...................................................................................................26
4.3 Non Essential Load Trip (Preferential Trip/ Load Shedding) .............................................27
4.3.1.1 Frequency...................................................................................................................................... 27
4.3.1.2 Active Phase Current ..................................................................................................................... 27
4.3.1.3 Active Phase Load......................................................................................................................... 27
4.3.1.4 Current.......................................................................................................................................... 28
4.3.2 Preferential Trip 1..........................................................................................................28
4.3.3 Preferential Trip 2..........................................................................................................29
4.4 Frequency Stabilization.....................................................................................................30
4.4.1 Gain ..............................................................................................................................30
4.4.2 Delay.............................................................................................................................30
4.4.3 Deadband ......................................................................................................................31
4.5 Auto Synchronizing...........................................................................................................32
4.5.1 Dead Bus Closure..........................................................................................................32
4.5.2 Gain ..............................................................................................................................32
4.5.3 Delay.............................................................................................................................32
4.5.4 Synctime .......................................................................................................................32
4.5.5 Circuit Breaker Close Time ...........................................................................................33
4.5.6 Frequency Deviation......................................................................................................33
4.5.7 Check Synchronizer function.........................................................................................33
4.6 Active Load Sharing..........................................................................................................34
4.6.1 Gain ..............................................................................................................................34
4.6.2 Delay.............................................................................................................................34
4.6.3 Deadband ......................................................................................................................34
4.6.4 Ramp Time....................................................................................................................34
4.6.5 Load Deviation..............................................................................................................35
4.6.6 CB Trip Level ...............................................................................................................35
4.6.7 Parallel Lines.................................................................................................................35
4.7 Voltage Matcher................................................................................................................36
4.7.1 Gain ..............................................................................................................................36
4.7.2 Delay.............................................................................................................................36
4.7.3 Deadband ......................................................................................................................36
4.8 Reactive Load Sharing.......................................................................................................37
4.8.1 Gain ..............................................................................................................................37
4.8.2 Delay.............................................................................................................................37
4.8.3 Deadband ......................................................................................................................37
4.8.4 Load Deviation..............................................................................................................37
4.8.5 CB Trip Level ...............................................................................................................38
4.8.6 Parallel Lines.................................................................................................................38
4.9 Grid parallel operation schemes.........................................................................................39
4.9.1 Fixed import..................................................................................................................39

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4.9.2 Peak import ...................................................................................................................39
4.9.3 Fixed export ..................................................................................................................40
4.9.4 Excess export ................................................................................................................40
4.9.5 Power factor control ......................................................................................................40
4.10 Load depending start and stop ...........................................................................................41
4.10.1 Start Condition ..........................................................................................................41
4.10.2 Start...........................................................................................................................41
4.10.3 Stop...........................................................................................................................41
4.10.4 Sequence ...................................................................................................................42
4.10.5 Cool Down Time .......................................................................................................43
4.10.6 Pulse or continuous start signal..................................................................................43
4.10.7 Start Time Out...........................................................................................................43
4.11 Large Consumer Request...................................................................................................43
4.11.1 Power of the large consumer......................................................................................44
4.11.2 Priority Source...........................................................................................................44
4.11.3 Standby Time ............................................................................................................44
4.11.4 Configuration of Request Input and Release Output...................................................44
4.11.5 Priority Selection.......................................................................................................45
4.12 IO & Relays ......................................................................................................................45
4.12.1 Alarm Relay Function................................................................................................45
4.12.2 Protection Trip Relay.................................................................................................45
4.12.3 Unload trip ................................................................................................................45
4.13 Programmable functions....................................................................................................46
4.13.1 Control of user defined function via inputs and outputs..............................................46
4.13.2 Control of governor by increase decrease pulse signals..............................................47
4.13.3 Control of AVR by increase decrease pulse signals....................................................47
4.13.4 Definition of start/ stop in and out outputs for generators...........................................48
4.13.5 Outputs for short circuit alarm and trip ......................................................................48
4.13.6 Outputs for over current alarm and trip ......................................................................49
4.13.7 Outputs for over load alarm and trip...........................................................................49
4.13.8 Outputs for under voltage alarm and trip....................................................................49
4.13.9 Outputs for over voltage alarm and trip......................................................................50
4.13.10 Outputs for under frequency alarm and trip................................................................50
4.13.11 Outputs for over frequency alarm and trip..................................................................50
4.13.12 Outputs for reverse power alarm and trip ...................................................................50
4.13.13 Outputs for excitation loss alarm and trip...................................................................51
4.13.14 Input and output for the frequency deviation trip........................................................51
4.13.15 Input and output for the vector shift trip.....................................................................51
4.13.16 Output for preferential trip.........................................................................................52
4.13.17 External Trip (Abnormal trip)....................................................................................52
4.13.18 Load depending start and stop....................................................................................52
4.13.19 Generator priority selection for load depending start and stop....................................52
4.13.20 Indication of 1st standby generator............................................................................53
4.13.21 Light Load Cancel Mode ...........................................................................................53
4.13.22 Light Load Indication ................................................................................................53
4.13.23 High Load Indication.................................................................................................53

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4.13.24 Low Capacity Alarm..................................................................................................54
4.13.25 CAT2 Alarm..............................................................................................................54
4.13.26 Large Consumer Request In- and Outputs..................................................................54
4.13.27 Voltage and Frequency ok Output..............................................................................54
4.13.28 Activation of load sharing schemes via programmable inputs ....................................54
4.13.29 Frequency Control Disable Output.............................................................................55
4.13.30 CBBLOCK................................................................................................................55
4.13.31 TOTAL STOP...........................................................................................................56
4.13.32 ENGINE ERROR......................................................................................................56
4.13.33 UNLOADSTOP ........................................................................................................56
4.13.34 Remote control of frequency and voltage stabilization ...............................................56
4.13.35 Remote control of synchronization.............................................................................57
4.13.36 Remote control of voltage matching...........................................................................57
4.13.37 Remote control of active and reactive load ramp up...................................................58
4.13.38 Remote control of active and reactive load sharing ....................................................58
4.13.39 Control of user defined function via Modbus .............................................................58
4.13.40 Function List .............................................................................................................59
4.14 Analogue Outputs..............................................................................................................62
4.14.1 Analogue Output 1.....................................................................................................62
4.14.2 Analogue Output 2.....................................................................................................62
4.15 Speed Control....................................................................................................................64
4.15.1 Speed control signal...................................................................................................64
4.15.2 Analogue output signal for speed control...................................................................64
4.15.3 Pulse output signals for speed control ........................................................................64
4.15.4 Voltage Range ...........................................................................................................64
4.15.5 Current Range............................................................................................................65
4.15.6 PWM Settings............................................................................................................65
5Voltage Control.....................................................................................................................66
5.1.1 Voltage control signal....................................................................................................66
5.1.2 Analogue output signal for voltage control ....................................................................66
5.1.3 Pulse output signals for voltage control..........................................................................66
5.1.4 Voltage Range...............................................................................................................66
5.1.5 Current Range ...............................................................................................................67
5.1.6 PWM Settings ...............................................................................................................67
5.2 Generator specification......................................................................................................68
5.2.1 Voltage..........................................................................................................................68
5.2.2 Generator Maximum Current.........................................................................................68
5.2.3 CT Primary Current.......................................................................................................69
5.2.4 Rated Frequency............................................................................................................70
5.2.5 Power Factor .................................................................................................................70
5.3 Restoring the factory default configuration........................................................................71
5.4 Power Up Delay ................................................................................................................71
5.5 Power Source....................................................................................................................71
5.6 Voltage ok Window...........................................................................................................71
5.7 Frequency ok Window.......................................................................................................71

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5.8 RS485 ...............................................................................................................................72
6Service configuration ............................................................................................................73
6.1 Read Config ......................................................................................................................73
6.2 Service Interval .................................................................................................................73
6.3 Duty Hour.........................................................................................................................73
6.4 Service confirmation .........................................................................................................73

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1Preface
The Littelfuse Selco C6200 FlexGen provides integrated protection, frequency stabilization, voltage
stabilization, check and automatic synchronization, active and reactive load sharing, programmable
inputs and outputs and data acquisition.
This manual describes the configuration of the C6200 FlexGen by the optional C6500 user interface
module or by PC (RS232).

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2System Preparation
2.1 CAN Bus Address
The DIP-switch located on the right hand side of the C6200 FlexGen is used to set the CAN bus
address. The CAN bus address is set as a binary value on the first 4 switches. Valid CAN bus
addresses are 1 to 15.
The CAN bus address should be set according to the generator reference number.
It is advisable to assign address 1 to the first C6200 FlexGen, number 2 to the second C6200
FlexGen etc. A unique CAN bus address must be assigned to each C6200 FlexGen.
Please ensure that two or more C6200 FlexGen units do not have similar CAN bus addresses.
The binary system works on the principle described below.
Switch 1 represents the decimal value 1
Switch 2 represents the decimal value 2
Switch 3 represents the decimal value 4
Switch 4 represents the decimal value 8
Examples:
SW1
SW2
SW3
SW4
CAN Address
ON
OFF
OFF
OFF
1
OFF
ON
OFF
OFF
2
ON
ON
OFF
OFF
3
OFF
OFF
ON
OFF
4
ON
OFF
ON
OFF
5
As an example, the address 1 is assigned by setting switch 1 to ON and the remaining switches to
OFF. Address 10 is assigned by setting switches 2 and 4 to ON and switches 1 and 3 to OFF. The
decimal value corresponds to the sum of the ON switch values.

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3Auxiliary Commands
The C6200 FlexGen is configured using clear text commands. These commands are issued through
the RS232 interface using either a PC based terminal emulator (TTY terminal) such as
HyperTerminal. Littlefuse Selco also offers a specialized PC application called WinConfig.
The optional Littelfuse Selco C6500 user interface can also be used to monitor and configure the
C6200 FlexGen.
The commands described in this section are used to read out the configuration, measurements and
alarms. This section also describes how to switch the unit into write enabled mode.
The configuration itself is described in section 4.
3.1.1 Read Measurements
The following command show all measured and calculated parameters. Please note that the reading
do not changes automatically. Retype the command to update the measurements.
READ MEAS
3.1.2 Read PMS
The command READ PMS shows the current state of the load depending start/stop system.
READ PMS
3.1.3 Read Alarms
Active alarms (e.g. fault conditions) will be show if the following command is issued.
READ ALARMS
3.1.4 Read Configuration
The READ CONFIG command dumps the current configuration of the C6200 FlexGen. The
configuration is made up from a series of commands. Each command can be issued in the form
shown, provided that the C6200 has been enabled to operate in write mode.
READ CONFIG
3.1.5 Read Event Log
C6200 saves the last XX events in an alarm log. This alarm log can be read out by following
command:
READ LOG
3.1.6 Set the date
Current date for the event log can be set by following command.
DATE
The unit will reply with following prompt:

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Now type the date in the requested format (Year:Month:Day e.g. 2008:09:03).
3.1.7 Set the time
Current time for the event log can be set by following command.
TIME
The unit will reply with following prompt:
Now type the time in the requested format (Hour:Minute:Second e.g. 14:02:39).
3.1.8 Enable Configuration Write mode
By default the C6200 FlexGen will be in read only mode. This means that the configuration can be
viewed and dumped but not written or updated.
The C6200 must be enabled for writing before any attempt is made to update the configuration. The
command to enable write mode is ENABLE.
ENABLE
Enable mode will prompt for the RS232 PIN. The default RS232 PIN is 0000 (four zeros).
3.1.9 Disable Configuration Write mode
To change back from configuration write mode or from service mode, use following command:
DISABLE
Please note that the RS232 console PIN is unique for each module. Also, the RS232 PIN is different
from the menu PIN of the C6500 User interface.
3.1.10 Enable Service mode
The service parameters (SERVICE INTERVAL, DUTYHOUR and SERVICE CONFIRM) are
protected with a separate PIN.
Use the following command to enable the service functions.
SERVICE ENABLE
3.1.11 Service Parameters
The service information (running hours of the generator and amount of running hours until the next
service) can be viewed by issuing the following command.
READ SERVICE

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3.1.12 Change of RS232 PIN
For changing the Read/Write Password it is necessary first to enable the Read/Write Mode as
described in 3.1.88.
The RS232 console PIN can be changed by the following command, followed by the 4 digit making
up the new PIN.
WRITE RS232 PIN
The RS232 PIN can be any combination of digits within the range of 0000 to 9999.
3.1.13 Change Service PIN
For changing the Service Password it is necessary first to enable the Service mode.
The service PIN can then be changed by the following command, followed by the 4 digit making up
the new PIN.
WRITE SERVICE PASSWORD
The service PIN can be any combination of digits within the range of 0000 to 9999.

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4Configuration
The C6200 FlexGen can be configured by using a TTY terminal (RS232), the WinConfig PC
application or the C6500 User Interface. This section describes the configuration by the TTY
terminal (RS232).
The C6200 FlexGen is delivered with a default configuration.
4.1 Protection
The definite time protection functions are typically configured with a setpoint (trip level) and a
delay.
The trip level is expressed as a percentage of the nominal value. It is important to understand how
the 100% reference is calculated. This is described in the function section of this manual.
Each of the protection functions can be enabled or disabled. If disabled, the parameters of a given
protection function has no influence on the operation.
All protection functions are intended to trip the generator circuit breaker.
4.1.1 Short Circuit Trip
The short circuit (SC) protection function will trip the circuit breaker in case a short circuit current
is detected in any one of the three phases. The SC protection will always act on the highest of the
three currents measured.
The trip level is configured as a percentage of the generator maximum rated current
(GENMAXCUR), which is specified in the configuration.
The trip will be issued if the critical level is exceeded continuously for the duration of specified
delay. The delay is configured in milliseconds.
100
321 GENMAXCURLevel
IorIorI 
Please note that most marine classification societies require the installation of a discrete
isolated short-circuit relay (such as the Littelfuse Selco T2300). This is in order to provide
redundancy.
The short circuit protection function can be enabled or disabled by the following command. The
parameter for the command is either YES or NO. The short circuit protection is enabled by default.
WRITE PROTECT SC ENABLED [YES / NO] (YES)
The level is set by the following command. The level can be set between 100 and 400 %.
Resolution is 1 %. Default level is 250% of maximum rated current.
WRITE PROTECT SC LEVEL [100 - 400] (250)
The delay is expressed in milliseconds and can be set between 100 and 1000 ms. Resolution is 1
ms. Default is 100 ms.

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WRITE PROTECT SC DELAY [100 –1000] (100)
4.1.2 Over Current Trip
The over current (OC) protection function will trip the circuit breaker in case an over current is
detected in any one of the three phases. The OC protection will always act on the highest of the
three currents measured.
The trip level is configured as a percentage of the generator maximum rated current
(GENMAXCUR) specified in the configuration.
The trip will be issued if the critical level is exceeded continuously for the duration of the time
delay. The delay is configured in seconds.
100
321 GENMAXCURLevel
IorIorI 
The over current protection function can be enabled or disabled by the following command. The
choice can be either YES or NO. The over current protection is disabled by default.
WRITE PROTECT OC ENABLED [YES / NO] (NO)
The level is set by the following command. The level can be set between 50% and 200 %.
Resolution is 1 %. Default is 100% of the maximum rated current.
WRITE PROTECT OC LEVEL [50 - 200] (100)
The delay is expressed in s and can be set between 2.0 and 20.0 s. Resolution is 0.1 s. Default is 5.0
s.
WRITE PROTECT OC DELAY [5.0 –120.0] (5.0)
The over current protection can be configured to auto reset. Auto reset means that the circuit
breaker can reclose immediately after trip (provided the condition for trip is no longer). If auto reset
is not activated, the protection function must be reset before the circuit breaker can be reclosed.
WRITE PROTECT OC AUTORESET [YES / NO] (NO)
The choice can be either YES or NO. Default is NO, meaning that reset is required before reclosure
of the breaker is possible.
4.1.3 Overload
The overload (OL) protection function will trip the circuit breaker in case of excessive active load.
The OL protection acts on the highest load in each individual phase.
4.1.3.1 Active Phase Load
The components of active loads will be calculated as shown below (active load mode).
P1= U1N x I1x Cos φ P2= U2N x I2x Cos φ P3= U3N x I3x Cos φ

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The trip level is defined as a percentage of the generators phase capacity. Please note that the
reference is expressed by the preconfigured power factor (PF) set in the configuration.
100
3
321


















PFGENMAXCUR
NOMVOLT
Level
PorPorP
The overload protection function can be enabled or disabled by the following command. The choice
can be either YES or NO. Default is NO.
WRITE PROTECT OL ENABLED [YES / NO] (NO)
The trip level can be set between 50% and 200 %. Resolution is 1 %. Default is 100 %.
WRITE PROTECT OL LEVEL [50 - 200] (100)
The delay is expressed in s and can be set between 2.0 s and 20.0 s. Resolution is 0.1 s. Default is
5.0 s.
WRITE PROTECT OL DELAY [2.0 –20.0] (5.0)
The over load protection can be configured to auto reset. Auto reset means that the circuit breaker
can reengage immediately after the protection trip (provided the trip cause has disappeared). If auto
reset is not activated the protection function must be reset manually before the circuit breaker can
be reengaged.
WRITE PROTECT OL AUTORESET [YES / NO] (NO)
The choice can be either YES or NO. Default is NO, meaning that manual reset is required before
reengagement of the breaker.
4.1.4 Voltage Protection
The voltage protection functions consists of an under voltage trip (UV) and an over voltage trip
(OV). The voltage protection functions will trip the circuit breaker in case the phase-phase voltage
between any of the three phases becomes either too low or too high. The Voltage protection will act
on the lowest or the highest of the three phase-phase voltage measurements.
U12 U23 U31
The trip level is configured as a percentage according to the nominal phase-phase voltage specified
within the system configuration.
100
312312 NOMVOLTLevelLower
UorUorU 
And
100
312312 NOMVOLTLevelUpper
UorUorU 

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The trip output for the voltage protection is the Protection Trip Relay (voltage free contact,
terminals 48, 49 and 50).
4.1.4.1 Under Voltage Trip
The under voltage (UV) protection function can be enabled or disabled by the following command.
The choice can be either YES or NO. Default is NO.
WRITE PROTECT UV ENABLED [YES / NO] (NO)
The trip level of the under voltage trip function is expressed as a percentage of the nominal voltage
of the generator. The level is set by the following command. The level can be set between 50 % and
150 %. Resolution is 1 %. Default is 70%.
WRITE PROTECT UV LEVEL [50 - 100] (70)
The delay is expressed in seconds and can be set between 2.0 s and 20.0 s. Resolution is 100 ms.
Default is 2.0 s.
WRITE PROTECT UV DELAY [1.0 –30.0] (2.0)
The under voltage protection can be configured to auto reset. Auto reset means that the circuit
breaker can reengage immediately after the protection trip (provided the trip cause has
disappeared). If auto reset is not activated the protection function must be manually reset before the
circuit breaker can be reengaged.
WRITE PROTECT UV AUTORESET [YES / NO] (NO)
The choice can be either YES or NO. Default is NO, meaning that reset is required before
reengagement of the breaker.
4.1.4.2 Over Voltage Trip
The over voltage (OV) protection function can be enabled or disabled by the following command.
The choice can be either YES or NO. Default is NO.
WRITE PROTECT OV ENABLED [YES / NO] (NO)
The trip level of the over voltage trip function is expressed as a percentage of the nominal voltage
of the generator. The level is set by the following command. The level can be set between 50 % and
150 %. Resolution is 1 %. Default is 130 %.
WRITE PROTECT OV LEVEL [100 - 150] (130)
The delay is expressed in seconds and can be set between 2.0 s and 20.0 s. Resolution is 100 ms.
Default is 2.0 s.
WRITE PROTECT OV DELAY [1.0 –30.0] (2.0)
The over voltage protection can be configured to auto reset. Auto reset means that the circuit
breaker can reengage immediately after the protection trip (provided the trip cause has

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disappeared). If auto reset is not activated the protection function must be manually reset before the
circuit breaker can be reengaged.
WRITE PROTECT OV AUTORESET [YES / NO] (NO)
The choice can be either YES or NO. Default is NO, meaning that reset is required before
reengagement of the breaker.
4.1.5 Frequency Protection
The frequency protection functions will trip the breaker in case the generator frequency becomes
either too low or too high. These functions are only active when the circuit breaker is closed.
The trip level is configured as a percentage according to the rated frequency specified within the
system configuration.
100
RATEFREQLevelLower
f 
or
100
RATEFREQLevelLower
f 
The trip output for the frequency protection is the Protection Trip Relay (voltage free contact,
terminals 48, 49 and 50).
4.1.5.1 Under Frequency Trip
The under frequency (UF) protection function can be enabled or disabled by the following
command. The choice can be either YES or NO. Default is NO.
WRITE PROTECT UF ENABLED [YES / NO] (NO)
The trip level of the under frequency trip function is expressed as a percentage of the nominal
frequency of the generator. The level is set by the following command. The level can be set
between 50 % and 150 %. Resolution is 1 %. Default is 70 %.
WRITE PROTECT UF LEVEL [50 - 100] (70)
The delay is expressed in seconds and can be set between 2.0 s and 20.0 s. Resolution is 100 ms.
Default is 2.0 s.
WRITE PROTECT UF DELAY [1.0 –30.0] (2.0)
The under frequency protection can be configured to auto reset. Auto reset means that the circuit
breaker can reengage immediately after the protection trip (provided the trip cause has
disappeared). If auto reset is not activated the protection function must be manually reset before the
circuit breaker can be reengaged.
WRITE PROTECT UF AUTORESET [YES / NO] (NO)

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The choice can be either YES or NO. Default is NO, meaning that reset is required before
reengagement of the breaker.
4.1.5.2 Over Frequency Trip
The over frequency (OF) protection function can be enabled or disabled by the following command.
The choice can be either YES or NO. Default is NO.
WRITE PROTECT OF ENABLED [YES / NO] (NO)
The trip level of the over frequency trip function is expressed as a percentage of the nominal
frequency of the generator. The level is set by the following command. The level can be set
between 50 % and 150 %. Resolution is 1 %. Default is 130%.
WRITE PROTECT OF LEVEL [100 - 150] (130)
The delay is expressed in seconds and can be set between 2.0 s and 20.0 s. Resolution is 100 ms.
Default is 2.0 s.
WRITE PROTECT OF DELAY [1.0 –30.0] (2.0)
The over frequency protection can be configured to auto reset. Auto reset means that the circuit
breaker can reengage immediately after the protection trip (provided the trip cause has
disappeared). If auto reset is not activated the protection function must be manually reset before the
circuit breaker can be reengaged.
WRITE PROTECT OF AUTORESET [YES / NO] (NO)
The choice can be either YES or NO. Default is NO, meaning that reset is required before
reengagement of the breaker.
4.1.6 Reverse Power Trip
The reverse power (RP) protection function will trip the circuit breaker in case of “motoring”,
which occurs when the generator is running as an electric motor and taking power from the bus bar.
The trip signal will be issued if the critical level is exceeded continuously for the duration of the
time delay.
The trip output for the reverse power protection is the Protection Trip Relay (voltage free contact,
terminals 48, 49 and 50).
The reverse power protection function can be enabled or disabled by the following command. The
choice can be either YES or NO. Default is NO.
WRITE PROTECT RP ENABLED [YES / NO] (NO)
The trip level of the reverse power function is expressed as a percentage of the nominal active
current in a single phase of the generator. The 100 % reference is the generator’s maximum current
in one phase (GENMAXCUR) multiplied by the rated power factor (PF).

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The level is set by the following command. The level can be set between 0 % and -20 %.
Resolution is 1 %. Default is -2.0 %.
WRITE PROTECT RP LEVEL [0.0 - -20.0] (-2.0)
The delay is expressed in seconds and can be set between 2.0 and 20.0 s. Resolution is 100 ms.
Default is 5.0
WRITE PROTECT RP DELAY [2.0 - 20.0] (5.0)
The reverse power protection can be configured to auto reset. Auto reset means that the circuit
breaker can reengage immediately after the protection trip (provided the trip cause has
disappeared). If auto reset is not activated the protection function must be manually reset before the
circuit breaker can be reengaged.
WRITE PROTECT RP AUTORESET [YES / NO] (NO)
The choice can be either YES or NO. Default is NO, meaning that manual reset is required before
reengagement of the breaker.
4.1.7 Excitation Loss Trip
The excitation loss (EL) protection function will trip the circuit breaker in case of reverse reactive
current, which occurs in case the generator loses its excitation.
The trip signal will be issued if the critical level is passed continuously for the duration of the delay.
The trip output for the excitation loss protection is the Protection Trip Relay (voltage free contact,
terminals 48, 49 and 50).
The excitation loss protection function can be enabled or disabled by the following command. The
choice can be either YES or NO. Default is NO
WRITE PROTECT EL ENABLED [YES / NO] (NO)
The excitation loss function reacts on a negative reactive current. The trip level of the excitation
loss protection function is expressed as a percentage of the nominal re-active current in a single
phase of the generator. The 100 % reference is the generator’s maximum current in one phase
(GENMAXCUR) multiplied by rated SIN(phi).
The level is set by the following command. The level can be set between 0 % and -150 %.
Resolution is 1 %. Default is -50 %.
WRITE PROTECT EL LEVEL [150.0 –0.0] (-2.0)
The delay is expressed in seconds and can be set between 0.5 s and 20.0 s. Resolution is 100 ms.
Default is 5.0 s.
WRITE PROTECT EL DELAY [2.0 - 20.0] (5.0)

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The excitation loss protection can be configured to auto reset. Auto reset means that the circuit
breaker can reengage immediately after the protection trip (provided the trip cause has
disappeared). If auto reset is not activated the protection function must be manually reset before the
circuit breaker can be reengaged.
WRITE PROTECT EL AUTORESET [YES / NO] (NO)
The choice can be either YES or NO. Default is NO, meaning that reset is required before
reengagement of the breaker.
4.1.8 Frequency Deviation Protection
This frequency deviation (FD) protection function is normally only used in grid paralleling
applications.
The frequency deviation protection will protect the generator from damages due to asynchronous
reconnection to the grid following a disconnection of a short duration.
The function will trip the generator in case the frequency changes above the setpoint within a
certain amount of time. Thus the adjustment is done in Hz per second (if the frequency changes
more that X Hz per second the function will trip).
Such frequency changes can happen as a result the sudden and significant load changes that might
happen if the grid is lost (grid breaker trips).
The Frequency deviation protection is very similar to the vector shift protection. Basically these
two protection functions are just two different ways of expressing the same phenomenon.
The trip output for the frequency deviation protection is the Protection Trip Relay (voltage free
contact, terminals 48, 49 and 50).
The frequency deviation protection can be enabled or disabled. This is done by the following
command. The choice can be set to either YES or NO. Default is NO.
WRITE PROTECT FD ENABLED [YES / NO] (NO)
The trip level is expressed in hertz per second with one decimal. The trip level is set by the
following command. The range is 0.0 Hz/s to 20.0 Hz/s. Resolution is 0.1 Hz/s. Default is 5.0 Hz/s.
WRITE PROTECT FD LEVEL [0.5 - 20.0] (5.0)
The frequency deviation protection can be configured to auto reset. Auto reset means that the circuit
breaker can reengage immediately after the protection trip (provided the trip cause has
disappeared). If auto reset is not activated the protection function must be reset before the circuit
breaker can be reengaged.
WRITE PROTECT FD AUTORESET [YES / NO] (NO)
The choice can be either YES or NO. Default is NO, meaning that reset is required before
reengagement of the breaker.

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4.1.9 Vector Shift Protection
This vector shift (VS) protection function is normally only used in grid parallel applications.
The vector shift protection will protect the generator from damages due to asynchronous
reconnection to the public grid after short time disconnections.
The vector shift protection will trip the breaker in case it detects a phase shift in the generator
voltage. For example if a zero crossing occur some degrees earlier or later than expected.
Adjustment is done in degrees.
The vector shift is depending on the change of the generator frequency. If the grid is lost, it will
result in a sudden change in generator frequency. A change in frequency will move the zero
crossing of the generator voltage to occur earlier (in case the generator load has dropped) or later (in
case the generator load has increased). This shift is expressed in degrees. If this vector shift is larger
than a certain set point the relay will trip.
The vector shift protection is very similar to the frequency deviation protection. Basically these two
protection functions are two different ways of expressing the same phenomenon.
The trip output for the vector shift protection is the Protection Trip Relay (voltage free contact,
terminals 48, 49 and 50).
The Vector Shift protection can be enabled or disabled. This is done by the following command.
The choice can be set to either YES or NO. Default is NO.
WRITE PROTECT VS ENABLED [YES / NO] (NO)
The trip level is expressed in º (phase angle). The trip level is set by the following command. The
range is 0 º to 90 º. Resolution is 1º. Default is 15º.
WRITE PROTECT VS LEVEL [0 - 90] (15)
The vector shift protection can be configured to auto reset. Auto reset means that the circuit breaker
can reengage immediately after the protection trip (provided the trip cause has disappeared). If auto
reset is not activated the protection function must be reset before the circuit breaker can be reclosed.
WRITE PROTECT VS AUTORESET [YES / NO] (NO)
The choice can be either YES or NO. Default is NO, meaning that reset is required before
reengagement of the breaker.