GE Multilin MM2 Low Voltage Motor Protection System

GE Multilin MM2 Low Voltage Motor Protection System

Product Overview: The MM2 is a protection and management system for low-voltage AC motors that integrates process control and protection functions with full-featured protection, advanced automation capabilities, cost-effectiveness, compact design, and easy installation and integration for motor control centre application scenarios.

Functional features

Protection and control: covers a wide range of protection functions, such as motor thermal modelling, ground fault, under-voltage, over-voltage, over-temperature protection, etc. It also monitors a wide range of abnormalities and sends out alarms, and supports a wide range of motor starter types with under-voltage automatic restart function.

Monitoring and metering: It can measure and display a variety of motor operating parameters, process data, fault records and statistical information, which is convenient for real-time control of motor status and maintenance management.

User Interface: Provide 40 characters LCD display, operation buttons, programming keyboard and status indicator, support local control and programming, communication through ModBus RTU RS485, support various baud rates, can be connected to the host computer to achieve remote monitoring.

Software support: Equipped with Windows® -based configurator MM2PC and EnerVista™ software suite for easy parameter setting, equipment monitoring, data logging and system integration.

Technical Specifications: Includes technical specifications such as measurement accuracy, range and delay time for a wide range of parameters such as overload curves, ground faults, undercurrents, undervoltages, etc., as well as input/output characteristics, communication specifications, environmental suitability and certifications to ensure reliable product performance.

Selection and Configuration: Chassis-mounted and panel-mounted models are available, with two option packages available to enhance functionality. Option Pack 1 adds control and diagnostic functions, Option Pack 2 enhances protection functions and input options, and a variety of expansion modules can be selected to meet different needs.

Performance Advantages

Comprehensive protection function: It is equipped with rich protection mechanisms, covering various types of protection such as motor thermal overload, ground fault, under-voltage, over-voltage, over-temperature, phase imbalance and so on. Through accurate measurement and judgement, it can effectively prevent the motor from being damaged due to various abnormal conditions. For example, it adopts 12 different I²t time overcurrent overload curves, combined with True RMS current detection technology, which can accurately respond to

Ground fault protection detects overcurrent from the residual connection of phase CTs or zero sequence CTs, sets a delay time to prevent false alarms, and provides alarm and trip functions.

Advanced automation control: support a variety of motor starter type programming, can be flexibly configured according to different motor requirements start. With under-voltage automatic restart function, it can automatically resume motor operation after a short power failure, reducing production interruption time. Various parameters can also be programmed to achieve customised protection and control strategies to meet the needs of different industrial scenarios.

Highly cost-effective: The low-cost modular design reduces the number of devices, replacing multiple independent devices such as bimetallic overload elements, timers, relays, etc., reducing procurement and maintenance costs. Meanwhile, its compact design can be installed in standard MCC drawers, saving space and improving space utilisation.