KEy BENEFITS
• Comprehensive motor protection plus voltage-dependent 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
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.
SR469-P1-LO-A20-E
SR469-P5-HI-A20-E
SR469-P5-HI-A20-E-H
SR469-P5-HI-A20-H
469-P1-LO-A1
469-P1-LO-A20
469-P1-HI-A1
469-P1-HI-A20
469-P5-LO-A1
469-P5-LO-A20
469-P5-HI-A1
469-P5-HI-A20
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
Communications
• Multiple Ports - 10baseT Ethernet, RS485, RS232, RS422, DeviceNet
• Multiple Protocols - Modbus RTU, Modbus TCP/IP, DeviceNet
Monitoring and Metering
• A, V, W, var, VA, PF, Hz, Wh, varh, demand
• Torque, temperature (12 RTDs)
• Event recorder
• Oscillography & Data Logger (trending)
• Statistical information & learned motor data
EnerVistaTM Software
• State-of-the-art software for configuration and commissioning GE Multilin products
• Document and software archiving toolset to ensure reference material and device utilities are up-to-date • EnerVistaTM Integrator providing easy integration of data in the 469 into new or existing monitoring and control systems
Protection and Control
The 469 is a digital motor protection system designed to protect and manage medium and large motors and driven equipment. It contains a full range of selectively enabled, self-contained protection and control elements as detailed in the Functional Block Diagram and Features table.
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
Overload Curves
The curves can take one of three formats: standard, custom, or voltage-dependent. For all curve styles, the 469 retains thermal memory in a thermal capacity used register, which is updated every 0.1 second. The overload pickup determines where the running overload curve begins.
The 469 standard overload curves are of standard shape with a multiplier value of 1 to 15.
The voltage-dependent overload curves are used in high inertia load applications, where motor acceleration time can actually exceed the safe stall time and motor thermal limits. During motor acceleration, the programmed thermal overload curve is dynamically adjusted with reference to the system voltage level. The selection of the overload curve type and shape is based on motor thermal limit curves provided by the motor vendor.
