GE MM300 Motor Management System

GE MM300 Motor Management System

Overview

The MM300 is a modular motor protection and control system designed specifically for  low-voltage motor applications. The MM300 provides the following key benefits.

• Flexible protection, control, and communication options to suit any low-voltage motor  application. 

• Small footprint designed specifically for IEC and NEMA MCC applications. 

• Modular design reduces the number of spare components for maintenance and  testing. 

• Integrated pushbuttons and LED indicators reduce external components and wiring. 

• DIN rail and Panel Mounting. 

• Multiple, simultaneous communication protocols allows simple integration into  monitoring and control systems. 

• Optional basic control panel or graphical control panel interface provides local control  and access to system information. 

• Automation FlexLogic™ for applications requiring more complex starter control, or  multi-starter scenarios with interlocking or programmable logic control.

Description of the MM300 Motor Management system

The MM300 can be equipped with either of two control panels, or with no control panel.

• Basic control panel: includes pushbuttons for Stop, Start A, Start B, Auto, Manual, and  Reset, and 12 LED status indicators. 

• Graphical control panel: includes a 3.5-inch 320 by 240 pixel backlit color LCD screen,  14 pushbuttons and 10 LED indicators, which provide access to actual values, trip and  alarm lists, event records, and setting configuration. A USB port is provided for laptop  computer connection. The MM300 includes the following input/output capabilities: 

• 2 to 18 contact outputs 

• 6 to 30 contact inputs The following additional functions are available: 

• Ten process interlocks configurable for trip, stop, or alarm. 

• Passcode for up to three security levels. 

• Six pre-defined starter types. 

• Start inhibits. 

• Time between starts. 

• Restart block timer. 

• Starts per hour. 

• Optional undervoltage restart.

CPU module

The main CPU module and optional communications board is contained in slot B. This  module provides a Modbus RTU RS485 port, a thermistor input, and a 50:0.025 CBCT input.  The optional communications board provides Fieldbus and Ethernet ports.

Ground current input

The MM300 CPU module has a sensitive ground input suitable for a 50:0.025 CT. There is  also a residual ground input on the CT module (IO_A) with the same rating as the phase  current inputs.