Specifications

G4
GE Limitamp
®
Medium Voltage Motor Control
Components
G
Applications
• Protection and management of three phase medium and
large horsepower motors and driven equipment, including
high inertia, two speed and reduced-voltage start motors.
Key Benefits
• Unique protection features – Comprehensive motor protec-
tion plus voltage dependant overload curves, torque
metering and protection, broken rotor bar protection
• Most advanced thermal model – Including multiple RTD
inputs for stator thermal protection
• Advanced monitoring functions – vibration, bearing
temperature
• Best in class man machine interface (MMI) – Large backlit
display with 40 characters to view relay information and
settings in direct sunlight, full numerical keypad, and set-
point navigation keys.
• Minimize replacement time – Draw-out construction
• Complete asset monitoring – Temperature, Analog I/O, full
metering including demand & energy
• Improve uptime of auxiliary equipment – Through I/O
monitoring
• Reduce troubleshooting time and maintenance costs –
Event reports, waveform capture, data logger
• Simplify testing – Built in simulation features
• Cost effective Access to information – Via Modbus RTU
protocol, through standard RS232 & RS485 serial ports,
and optional Modbus RTU over TCP/IP through embedded
Ethernet Port to connect to 10MB Ethernet local or wide
area networks.
• Follow technology evolution – Flash memory for product
field upgrade
• Long lasting life when exposed to chemically corrosive and
humid environments with optional conformal coating
Features
Protection and Control
• Thermal model biased with RTD and negative sequence
current feedback
• Start supervision and inhibit
• Mechanical jam
• Voltage compensated acceleration
• Undervoltage, overvoltage
• Underfrequency
• Stator differential protection
• Thermal overload
• Overtemperature protection
• Phase and ground overcurrent
• Current unbalance
• Power elements
• Torque protection
• Dual overload curves for 2 speed motors
• Reduced voltage starting control
Monitoring and Metering
• A V W var VA PF Hz Wh varh demand
• Torque, temperature
• Event recorder
• Oscillography & Data Logger (trending)
• Statistical information & learned motor data
• Motor starting reports
User Interface
• Fr
ont Panel LEDs, full key pad, and backlit LCD display
• RS232, and RS485 ports – up to 19,200 bps
• Optional Embedded 10BaseT, 10Mbs Ethernet port
• ModBus
™
RTU Protocol
• ModBus
™
over TCP/IP
• Optional Device Net Protocol
• Includes EnerVista software
Inputs and Outputs
• 12 RTDs, programmable
• 5 pre-defined & 4 assignable digital inputs
• 6 output relays
• 4 analog inputs
• 4 programmable analog outputs
Multilin 469 Motor Protection System