LOAD SHARING & SPEED CONTROL MODULE
SELCO A/S
Refurbished
The SELCO S6100 SIGMA S/LS Module is an integrated generator synchronization and load-sharing controller designed for generator switchboards and power-management systems.
According to SELCO, the S6100 provides busbar monitoring, frequency stabilization, voltage stabilization, voltage matching, automatic synchronization and active/reactive load sharing. It can interface with conventional or electronic speed governors and Automatic Voltage Regulators (AVRs).
This makes the S6100 highly relevant for ships operating multiple diesel generators in parallel.
Manufacturer: SELCO A/S
Model: S6100
Series: SIGMA
Product Type: Synchronizing / Load Sharing Module
Common Name: S6100 S/LS Module
Application: Marine Generator Control & Power Management
Functions: Synchronization, Load Sharing, Voltage/Frequency Stabilization, Busbar Monitoring
Supply: Dual 24 VDC primary and backup supply
Communication: CAN Bus, RS485 MODBUS and service/configuration interfaces
Typical Installation: Marine Main Switchboard / Generator Control Panel
SELCO's manual specifies isolated 24 VDC primary and backup power supplies and an environmental operating range of approximately -15°C to +70°C.
The S6100 supervises and regulates a generator when it operates alone or in parallel with other generators.
Before closing the generator circuit breaker, the module can regulate:
Generator Frequency → Generator Voltage → Phase Relationship → Synchronization → Circuit Breaker Closing
After the circuit breaker closes, the S6100 performs active and reactive load sharing.
SELCO explains that the active load-sharing function increases or decreases engine speed to balance generator active current/load, while reactive load sharing works together with voltage regulation to balance reactive load.
The official SELCO feature list includes:
Before a generator can safely connect to an energized busbar, its:
Voltage • Frequency • Phase Sequence • Phase Angle
must be within permitted synchronization limits.
The S6100 regulates engine speed and generator voltage and then provides the circuit-breaker closing command when synchronization conditions are acceptable.
The module also supports check synchronizer operation, where breaker closing can be permitted during manual synchronization when the defined phase conditions are satisfied.
Once the generator breaker is closed, the S6100 starts load sharing.
Active power or kW load is controlled primarily through engine speed/governor commands.
Reactive power or kVAr load is controlled through voltage/AVR regulation.
SELCO's manual specifies programmable parallel-line arrangements for active and reactive load sharing, enabling the S6100 to work in suitable multi-generator installations.
The S6100 front panel clearly includes terminals and indicators for:
Voltage Inputs L1 / L2 / L3 / N
I/O
C/B Control
Relay Contacts
Primary Supply
Backup Supply
SYNC
Analog Outputs
Manual I/O & Ground
Parallel Lines
Visible indication functions include:
VOLTAGE OK • PHASE OK • UNLOAD • C/B BLOCK • C/B CLOSE • C/B TRIP • SPEED + / - • VOLT + / - • ALARM
Some S6100 revisions also show operating-status indicators such as:
IDLE • SYNCHRONIZING • ON BUSBAR
These indications are useful for fault finding during generator operation.
The S6100 normally works with the SELCO S6000 IO/P Module.
SELCO states that the S6000 provides generator measurement, protection, basic I/O and data acquisition, while the S6100 handles synchronization and load-sharing functions.
The S6100 can also interface with optional S6600 / S6610 Power Manager modules.
A typical arrangement is:
Generator → S6000 Measurement/Protection → S6100 Synchronizing & Load Sharing → S6600/S6610 Power Management → Switchboard / Breaker / Governor / AVR
Check:
Possible causes include:
Inspect:
SELCO notes that overly aggressive stability settings can improve speed of load correction but increase the risk of overshoot or instability.
Check:
Check both:
Primary Supply and Backup Supply
along with 24 VDC wiring and external fuses/protection.
Verify:
SELCO specifies that each paired S6000 and S6100 should have the same CAN address, while each generator pair must have a unique address on the system.
SELCO recommends rear-switchboard mounting using four screws rather than relying on DIN rail mounting due to the module's weight. Adequate space should remain around the module so plug-in terminals and service connections can be removed.
For marine maintenance:
A replacement S6100 should not automatically be installed using another vessel's configuration.
SM MARINE SERVICE™ can support sourcing of:
SELCO S6100 SIGMA S/LS Module • S6000 IO/P Module • S6500 User Interface • S6600 / S6610 Power Manager • Generator Synchronizer • Load Sharing Module • Generator Protection Module • Terminal Blocks • Communication Components • Switchboard Control Modules • Related SELCO Marine Generator Automation Spare Parts
Depending on availability:
New • Used • Tested Working • Refurbished • Reconditioned
For replacement inquiries, send:
Model + Existing Configuration + Generator Details + Switchboard Details + Front/Rear Photos + Fault Description + Required Quantity
The SELCO S6100 is suited to marine and offshore generator-control systems found aboard:
Bulk Carriers • Container Ships • Oil Tankers • Chemical Tankers • LNG/LPG Carriers • Offshore Vessels • Tugboats • Ferries • Passenger Ships • Research Vessels • General Cargo Ships
It is especially relevant to vessels using multiple generators requiring automatic synchronization and load sharing.
Many vessels continue to operate original SIGMA generator automation because the system combines protection, synchronization, load sharing and power management in a modular design.
Replacing only a failed S6100 can often be more practical than redesigning the vessel's complete:
Generator Switchboard • Governor Interface • AVR Interface • Circuit-Breaker Controls • Power Management System
The availability of official manuals, connection diagrams and configuration tools is also beneficial for service and replacement work.
The SELCO S6100 is a SIGMA synchronization and load-sharing controller used to monitor a generator and busbar, synchronize the generator and manage active/reactive load sharing.
It normally relies on measurements and calculations from a corresponding SELCO S6000 IO/P Module.
Yes. Automatic synchronization and check-synchronizer functions are documented by SELCO.
Yes. The S6100 supports governor and AVR interfaces for frequency/speed and voltage control.
Yes. It supports both active kW and reactive kVAr load sharing.
Yes. The S6100 provides separate primary and backup 24 VDC supply inputs.
SM MARINE SERVICE™ supports worldwide sourcing of SELCO generator automation modules and related marine electrical spare parts, subject to availability.
The SELCO S6100 SIGMA S/LS Module is a marine generator synchronization and load-sharing controller providing busbar monitoring, frequency and voltage stabilization, automatic synchronization, voltage matching and active/reactive load sharing. It supports governor and AVR control, CAN Bus, RS485 MODBUS and redundant power supply. SM MARINE SERVICE™ supports worldwide sourcing of SELCO S6100 modules and marine generator automation spare parts in new, used, tested, refurbished and reconditioned condition, subject to availability.
The official manual covers installation, synchronization, check synchronizer, active/reactive load sharing, configuration, wiring, communications and troubleshooting.
Download SELCO S6100 Manual PDF
The official product page includes S6100 manuals, connection diagrams, CAN Bus wiring, MODBUS information, configuration software and SIGMA documentation.
SELCO S6100 SIGMA Control Module – Official Product Page
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Available Condition:
• New Equipment • Used Equipment • Refurbished Equipment • Reconditioned Equipment
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• Bangladesh • China
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