WOODWARD

1. Full Product Nomenclature

• Trade Name: MSLC‑2‑5
• Full Official Name: MSLC‑2‑5 Master Synchronizer and Load Control, 5 A Current Input Versionmultisis.c…
• Part Number: 8440‑1877
• Hardware Suffix: L (L‑variant: hardware assembly variant, defines terminal configuration, component layout and conformal‑coated industrial hardware for heavy‑duty / marine environment)

Definition breakdown:

• MSLC = Master Synchronizer and Load Control
• 2 = 2nd‑generation digital platform (successor of legacy MSLC‑1)
• 5 = 5 A secondary CT current input (the other variant MSLC‑2‑1 is for 1 A CT secondary)
• 8440‑1877: Woodward factory part number
• ‑L: hardware assembly variant, not firmware revision; it specifies internal component configuration for panel‑mount industrial power‑system cabinets.

Critical note: MSLC‑2‑5 cannot work independently. It acts as the system‑level master power‑management unit, and must communicate over Ethernet network with DSLC‑2 generator controllers on each genset to complete synchronization and plant‑wide load regulation.

Part Number: 8440‑1877 L

2. Product Background

Woodward, USA, is a global core supplier for engine‑generator control, synchronization and distributed‑power management. The MSLC‑2 platform is the second‑generation upgrade of the classic MSLC master synchronizer series, developed to solve complex multi‑genset intertie‑breaker and utility‑grid‑parallel applicationsWoodward.More products: www.plcva.com

In traditional multi‑generator‑grid‑parallel systems, separate hardware modules were required for synchronizer, load sensor, import‑export regulator, power‑factor controller and dead‑bus‑closing logic. The MSLC‑2 integrates all these functions into one single processor‑based unit, eliminating redundant PT/CT sensors and discrete auxiliary modules.

Model MSLC‑2‑5 (8440‑1877‑L) is the 5‑ampere CT‑input hardware variant, designed for global projects where current transformers output 5 A secondary signals (most common industrial standard outside North America). Suffix‑L stands for factory hardware assembly for heavy‑industrial, offshore‑marine, high‑EMI environments with conformal‑coated PCBA.

System architecture: One MSLC‑2‑5 master unit can manage up to 32 DSLC‑2 genset slave controllers. Multiple MSLC‑2 units (max 16) can coexist within one large‑scale multi‑bus‑segment power plant for main‑tie‑main, multi‑utility‑intertie topologies; redundant master mode is supported for high‑reliability sitesWoodward.

Commissioning relies on Woodward ToolKit PC software via Ethernet / USB port; no handheld programmer is needed compared to old‑generation MSLC‑1abb-drive…..

Part Number: 8440‑1877 L

3. Core Functions

MSLC‑2‑5 is a master‑level synchronizer & plant‑wide real‑/reactive‑power manager, communicating via dedicated Ethernet with DSLC‑2 slave genset controllers; it also supports Modbus‑TCP for upper‑level DCS / SCADA system interconnection.

3.1 Synchronization & Breaker‑Closing Functions

1. Selectable synchronizing modes: Phase‑matching synchronizing (fast closure for emergency standby) or slip‑frequency synchronizing (pre‑defined import / export power direction after breaker closure).
2. Voltage matching: Automatically adjust bus voltage before intertie‑breaker closure.
3. Dead‑bus‑closing capability: Support live‑bus‑to‑dead‑bus and dead‑bus‑to‑dead‑bus breaker closure for black‑start scenarios.
4. Transformer phase‑angle compensation: Compensate phase shift caused by power transformers for accurate synchronization.
5. Synchronization timeout alarm, multi‑shot auto‑reclosing logic.

Part Number: 8440‑1877 L

3.2 Master Load‑Control Modes (4 operational modes)

1. Base‑load Mode: Force all paralleled generators to maintain a fixed total plant power output against the utility grid.
2. Import‑Export Control Mode: Precisely control the kW power import‑export magnitude at the utility tie‑breaker point; bumpless load ramp‑up / ramp‑down with configurable ramp rate.
3. Process Control Mode: Cogeneration plant master control, regulate steam pressure / exhaust temperature or other process variables by adjusting total genset power output.
4. Utility‑unload Mode: Smoothly unload all on‑line generators before utility‑breaker trip during mains‑failure events.

3.3 Reactive‑Power & Power‑Factor Management

• Centralized VAR control and power‑factor set‑point control; send commands to DSLC‑2 slave controllers to distribute reactive‑power among paralleled generators.
• Smooth reactive‑power ramping to avoid voltage shock during intertie‑breaker switching.

3.4 Measurement, Alarm & Diagnostics

• 3‑phase true‑RMS measurement, robust performance under harmonic distortion and unbalanced‑load conditions via digital‑signal‑processing algorithm.
• Multi‑limit over‑/under‑voltage, over‑/under‑frequency, power‑reverse‑power protection and alarm functions.
• Multiple programmable relay outputs for alarm status and breaker‑control logic.
• Event log, fault history recording; full metering data accessible via ToolKit software or Modbus‑TCP.

3.5 Communication & Hardware Spec Highlights

• Power supply: 18‑32 VDC wide‑range DC input
• CT input: 5 A secondary (MSLC‑2‑5 core feature)
• Voltage input: 100‑690 V AC L‑L
• Communication: Dual‑Ethernet (redundancy supported), Modbus‑TCP, USB commissioning port
• Installation: Panel‑mount inside switchgear, IP20 protection
• Certification: CE, UL/cUL, LR, ABS marine type‑approval for shipboard power‑system deployment.

Hardware limitation: MSLC‑2‑5 itself has NO governor / AVR direct driving outputs for generators. It sends set‑point commands over Ethernet to DSLC‑2 controllers; DSLC‑2 executes speed and voltage adjustment for each genset.

Part Number: 8440‑1877 L

4. Typical Applications & Usage Scenarios

1. Cogeneration / CHP Industrial Plants Combined‑heat‑and‑power facilities; MSLC‑2‑5 acts as master to control import‑export power and maintain process steam pressure, coordinating multiple generators paralleled with public utility grid.More products: plcva.com
2. Multi‑genset power‑houses with utility‑intertie breaker Large industrial standby‑and‑prime‑power stations, refineries, mines, chemical plants; realize automatic synchronizing, bumpless load transfer, import‑export limitation, and mains‑failure utility‑unload protection.
3. Main‑Tie‑Main (MTM) multi‑bus‑segment power systems Multi‑section bus‑bar systems with multiple tie‑breakers; multiple MSLC‑2 units manage each intertie breaker for complex plant power‑distribution.
4. Marine & Off‑shore power‑generation systems Shipboard multi‑generator plant, offshore platform power management; hardware variant‑L conformal‑coated version adapts to humidity, vibration and high‑EMI marine environment, with ABS / LR marine certification.
5. Micro‑grid and distributed‑energy‑resource sites Island‑mode and grid‑connected micro‑grid projects, coordinate multiple diesel‑generators and grid‑tie‑breaker operation.
6. OEM power‑system integrator & switchgear‑builder projects Standard Woodward master power‑management solution for system houses, used together with DSLC‑2 genset controllers to deliver complete paralleling‑control system.

Compatibility Remarks

• Must pair with DSLC‑2 series generator controllers (DSLC‑2‑1 / DSLC‑2‑5) on each generator unit.
• Maximum system capacity: 32 pcs DSLC‑2 slave controllers per MSLC‑2 master; up to 16 MSLC‑2 units within one whole plant network.

5. Technical Summary Table

表格

Item	Description
Full Name	MSLC‑2‑5 Master Synchronizer and Load Control (5 A CT input)
Woodward P/N	8440‑1877
Suffix‑L	Industrial heavy‑duty hardware assembly, conformal‑coated PCBA
Core Role	Plant‑level master synchronizer & import‑export / process‑load master controller
CT Secondary Input	5 A
Communication	Dual Ethernet, Modbus‑TCP, USB (ToolKit commissioning)
System Partner	DSLC‑2 genset controllers; max 32 DSLC‑2 per MSLC‑2‑5
Synchronizing Mode	Phase‑matching / slip‑frequency synchronizing; dead‑bus‑closing support
Load‑control Modes	Base‑load, Import‑Export, Process‑control, Utility‑unload
Power Supply	18‑32 VDC
Protection Class	IP20 (cabinet‑internal installation)
Certification	CE, UL/cUL, ABS, LR marine approval

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More products: www.plcva.com

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