Sel C6200 FlexGen User manual

C6200 FlexGen
Generator Controller
Installation Manual
!
4560 River Bottom Drive
Norcross, GA 30092
P: [phone]
W: SELCOUSA.com

Selco C6200 FlexGen
Revision: 03-06-2014 Page 2 of 24
Table of Contents
1Preface..........................................................................................................................................3
2Front View ...................................................................................................................................4
3Installation....................................................................................................................................5
4Isolation and Grounding ..............................................................................................................6
5Connections..................................................................................................................................7
5.1 Power Supply ...........................................................................................................................7
5.2 Voltage Inputs..........................................................................................................................8
5.3 Current Inputs ........................................................................................................................10
5.4 Programmable Inputs .............................................................................................................12
5.5 Analogue Inputs .....................................................................................................................14
5.5.1 Voltage Input .....................................................................................................................14
5.5.2 Frequency Input .................................................................................................................14
5.6 Parallel Lines .........................................................................................................................15
5.7 GOV/AVR Control ................................................................................................................16
5.8 Inputs......................................................................................................................................18
5.8.1 C/B .....................................................................................................................................18
5.8.2 Manual ...............................................................................................................................18
5.8.3 Unload................................................................................................................................18
5.8.4 Reset...................................................................................................................................18
5.8.5 F/V Ctrl. Disable................................................................................................................18
5.8.6 Dead Bus lock ....................................................................................................................19
5.9 Relays.....................................................................................................................................19
5.9.1 C/B Close ...........................................................................................................................19
5.9.2 Protection Trip ...................................................................................................................19
5.9.3 Unload Trip........................................................................................................................20
5.10 Programmable Outputs ..........................................................................................................20
5.11 Analogue Outputs ..................................................................................................................20
5.12 Alarm .....................................................................................................................................21
5.13 RS485.....................................................................................................................................22
5.14 CAN bus.................................................................................................................................23
6Specifications:............................................................................................................................24

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1 Preface
The Littelfuse Selco C6200 FlexGen provides integrated generator protection, frequency
stabilization, voltage stabilization, check and automatic synchronisation, voltage matching, active
and reactive load sharing, basic and programmable I/O and data acquisition.
The Littelfuse Selco C6200 FlexGen can operate in parallel with other C6200 FlexGen modules and
interface with the C6500 User Interface Module via the on-board RS232 interface. SCADA and
HMI systems can be connected via the RS485 MODBUS interface.

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2 Front View

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3 Installation
The C6200 FlexGen must be secured to the rear of the switch board using four 5 mm. screws. DIN
rail mounting is not advisable due to the weight.
Please ensure that enough space is given around the module so that the plug-in terminals can be
removed and reinserted without stressing the wires. The length of the cables should allow for the
easy removal and insertion.

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4 Isolation and Grounding
In marine installations ground (switchboard chassis) and common reference (COM) should not be
connected together. In a marine installation the vessels hull is considered as “ground”.
Connecting any of the COM connections on the C6200 FlexGen to ground (hull) or switchboard
chassis may cause electrical noise to be injected into the system.
The general rule is:
COM terminals should not be connected to ground (vessels hull) or to the switchboard chassis.
Negative poles of the power supplies should not be connected to ground (vessels hull) or to the
switchboard chassis.

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5 Connections
The C6200 FlexGen is wired up through plug-in terminals. The plug-in terminals provide safe and
durable connections without sacrificing ease of installation and servicing. One exception is the
inputs for the currect transformers, which are fixed terminals to avoid shock from accidental
disconnection of live current inputs.
5.1 Power Supply
The circuitry of the the C6200 FlexGen must be powered by a single external power supply. The
supply must provide a nominal voltage of +24 V DC. The C6200 FlexGen will tolerate relatively
wide variations in the supply voltage (please refer to the specifications). The supply is connected to
terminal 30 and 32 of the AUX SUPPLY plug-in connector.
Terminal
Signal
Description
30
+24 V DC
Positive terminal of primary supply
31
FREE (unused / no connection)
32
-24 V DC
Negative terminal of primary supply
The auxiliary power supply is not isolated from the remaining circuitry. This means that the supply
reference terminal (terminal 32) has connection to the module’s COM terminal.
The front AUX SUPPLY LED illuminates with a steady green light to indicate that the supply
voltage is OK and within the tolerated limits for safe operation.

Selco C6200 FlexGen
Revision: 03-06-2014 Page 8 of 24
External switching of the supply (e.g. to power the units on and off) should be done by making
or braking positive supply (terminal 30). Do not use terminal 32 to make and break the
supply.
5.2 Voltage Inputs
The AC voltages connect to the BUS BAR VOLTAGE and GENERATOR VOLTAGE plug-in
terminals.
The voltage inputs can operate with high voltage (up to 690 V AC nominal), so precaution
must be taken to avoid electrical shock and personal injury. Do not touch the voltage input
plug-in terminal unless you are absolutely sure that both the busbar and generator is off. The
generator should be stopped and blocked against starting –the busbar should be dead. Also
make sure that there is no risk of another power source being connected to the busbar while
you are working with the voltage inputs.
Voltages above 690 V AC are supported through use of external transformers (PT). When using
PTs please ensure that the PT does not affect the phase of the AC voltage measurement. Phase shift
in the PT will directly affect the calculation of power factor, and thereby the calculation of active
and reactive currents and loads.
The phases L1, L2 and L3 of the busbar and generator voltage must be connected to L1, L2 and L3
of the busbar/generator voltage input plug-in terminals. Intermediate 2 A slow-blow fuses should be
inserted between the individual phases and the related voltage inputs.

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It is important that the phases are connected in the correct order (correct phase sequence).
Interchanging the phases will result in an incorrect power factor calculation and thereby incorrect
calculation of active/reactive currents and loads. It is important that the phases are connected to the
corresponding terminals (phase 1 to L1, phase 2 to L2 and phase 3 to L3).
Terminal
Signal
Description
5
AC voltage
Generator phase L1
6
AC voltage
Generator phase L2
7
AC voltage
Generator phase L3
The BUSBAR VOLTAGE LED shows (by steady light) whether the voltage levels measured
between the phases are within limits. The reference is the nominal phase-phase voltage
(NOMVOLT) that has been entered in the configuration. The toleance is defined by the voltage OK
window (VOLTOKWND) also present in the configuration.
The same scheme applies to the GENERATOR VOLTAGE LED. However, on older versions of
the C6200 FlexGen the LED will also flash while the generator breaker is open. This depends on
the firmware revision.
Terminal
Signal
Description
1
AC voltage
Bus bar phase L1
2
AC voltage
Bus bar phase L2
3
AC voltage
Bus bar phase L3

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5.3 Current Inputs
The C6200 FlexGen measures current through external current transformers (CTs). The C6200
FlexGen supports 5 A CTs. Class 1 CTs for protection is recommended. The CTs can be shared
with third-party equipment provided that this equipmed due not place a burden on the CTs (that the
CT inputs are isolated by e.g. transformers inside the third-party equipment).
The CT ratio should cover the maximum current of the generator.
The CTs must be capable of coping with limited time short-circuit currents without going into
saturation (Protection Transformers).
The external CTs connect to the GENERATOR CURRENT terminals. It is important to ensure that
the direction of the current flow is correct. The current flow is usually indicated by S1 and S2
notations on the CT enclosure. S1 of the CT on phase 1 connects to terminal 9 and S2 connects to
terminal 10.