GE Grid Solutions Multilin 469 SR469-P5-HI-A20-E-H

GE Grid Solutions Multilin 469  SR469-P5-HI-A20-E-H

The Multilin™ 469 Motor Protection System, a member of the SR family of relays, provides protection,

control, simplified configuration and advanced communications in a cost effective industry leading

draw-out construction. Designed for medium voltage motors, the 469 delivers advanced protection with

customizable overload curves and single CT differential protection for added flexibility. The 469 also

provides simplified configuration using the Motor Settings Auto-Configurator, providing a quick and easy

set-up of motor parameters. Coupled with advanced protection and diagnostics, the 469 provides users

the flexibility of multiple communication protocols allowing integration into new and existing control

networks.

Key Benefits

• Comprehensive motor protection 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

• 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

• Built in simulation functions simplify testing and commissioning

• Cost Effective Access to information - Through standard RS232 & RS485 serial ports, and optional Ethernet and DeviceNet Ports

• Field upgradable firmware and settings

• Optional Conformal coating for exposure to chemically corrosive or humid environments

Motor Thermal Model

The primary protective function of the 469 is the

thermal model with six key elements:

• Overload Curves

• Unbalance Biasing

• Hot/Cold Safe Stall Ratio

• Motor Cooling Time Constants

• Start Inhibit and Emergency Restart

• RTD Biasing

Ground Fault

This function is designed to protect motors

against phase to ground faults.

There are two dedicated ground current inputs

in the relay, which support the following types