Woodward MSLC-2XT Master Synchronizer and Load Control Application

Application

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The Woodward MSLC-2XT™ control is the direct successor of the former MSLC™ master synchro

nizer and load control. The MSLC-2XT™ is a microprocessor-based overall plant load control designed

for use in a system with Woodward DSLC-2XTTM, DSLC-2TM (“Digital Synchronizer and Load Control”)

controls on each generator to provide utility synchronizing, paralleling, loading and unloading of a

three-phase generating system.

Applications allow up to 32 generators to be paralleled and controlled in conjunction with up to 16

MSLC-2XT™, MSLC-2™. A dedicated Ethernet system provides seamless communications between

DSLC-2TM and MSLC-2TM units. A second Ethernet port is provided for customer remote control and

monitoring capability using Modbus TCP allowing DCS and PLC interfacing. Both together can be used

as a redundant Ethernet system. Modbus TCP is also available through additional Ethernet connection

(named C). Modbus RTU is available through a separate RS-485 port.

MSLC-2 function summary

Original MSLC functions include:

• Selectable for phase matching or slip frequency synchronizing between the utility and a local

bus with voltage matching

• Automatic system loading and unloading for bumpless load transfer

• Import/export level control capability

• Process control for cogeneration, pressure, maintenance or other process

• Proportional loading of associated DSLC-2 controls in isochronous load sharing

• Adjustable power factor control

• Built in diagnostics with relay output

• Multifunction adjustable high and low limit alarms and adjustable load switches with relay outputs

• Digital communications network to provide loading and power factor control of individual