The SR469 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.
Voltage dependant overload curves, torque metering and protection, broken rotor bar protection
Most advanced thermal model - Multiple RTD inputs for stator thermal protection
Minimize replacement time - Draw-out construction
Complete asset monitoring - Temperature, Analog I/O, full metering
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
Protection and Management of three phase medium and large horsepower motors and driven equipment, including high inertia, two speed and reduced-voltage start motors
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
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.
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
The 469 includes high accuracy metering and recording for all AC signals. Voltage,current, RTD and power metering are built into the relay as a standard feature.
Metering
The following system values are accurately metered and displayed:
Phase, differential and ground currents, average current, motor load, current unbalance.
Phase-to-ground and Phase-to-phase voltages, average phase voltage, system frequency.
Real, reactive, apparent power, power factor, watthours, varhours, torque
Current and power demand.
Analog inputs and RTD temperatures.
Thermal capacity used, lockout times, motor speed
Monitoring
The 469 is equipped with monitoring tools to capture data. The following information is presented in a suitable format.
Event Recorder
The event recorder stores motor and system information with a date and time stamp each time a system event occurs. Up to 256 events are recorded.
Oscillography
The 469 records up to 128 cycles with 12 samples per cycle of waveform data for 10 waveforms (Ia, Ib, Ic, Ig, Diffa, Diffb, Diffc, Va, Vb, Vc) each time a trip occurs. The record is date and time stamped.
Advanced Motor Diagnostics
The Multilin 469 provides advanced motor diagnostics including a broken rotor bar detection function. The broken rotor bar detection is a condition maintenance function that continuously monitors the motor’s health while in operation. The advanced Motor Current Signature Analysis (MCSA) continuously analyzes the motor current signature and based on preset algorithms will determine when a broken rotor bar is present in the motor.
View motor status using digital inputs, analog inputs and RTD inputs
The EnerVista™ Suite is an industry leading set of software programs that will simplify every aspect of using the 469 relay. Tools to monitor the status of your motor, maintain your relay, and integrate information measured by the 469 into HMI or SCADA monitoring systems are available. Also provided are the utilities to analyze the cause of faults and system disturbances using the powerful Waveform and Sequence of Event viewers that come with the 469 Setup Software that is included with each relay.Learn More
Access Control
Multilin devices and relays are designed with simple but powerful security to enable reliability and compliance for virtually any project or implementation. With support for multi-level permissions and multi-factor supervisory controls, Multilin devices can help you manage the integrity of your system during commissioning, testing, implementation, and beyond.
The SR Family provides separate authentication for settings and commands to the system. In addition, as discrete authentications for local and remote access, it also provides a supervisory control factor that can lock or unlock a device for configuration changes and other modifications.
Intrusion Detection
Multilin’s family of protection and control products can also help enable your security perimeter and intrusion detection programs. By providing essential alarming and logging of critical events, Multilin devices can help you detect potential breaches within your system and allow you to respond quickly and effectively. Specifically, unsuccessful access attempts are logged, alarmed, and lead to potential attackers being locked out. This ensures the reliability of your system during questionable activity.control factor that can lock or unlock a device for configuration changes and other modifications.
Auditing and Reporting
With the Security Audit Trail reporting feature and support for Event logging of key activities such
as configuration changes, Multilin devices can help ensure device and protection system integrity,
and perform forensic auditing of activities and changes for compliance.
Embedded DeviceNet Protocol
- Allows the 469 to communicate to remote control centers via DeviceNet based networks, quite popular in industrial applications, particularly in factory automation.
Embedded Ethernet communication
- Allows the 489 to be connected directly to Ethernet Local/Wide Area Networks (LAN/WAN) supporting baud rates of up to 10Mbps, using Modbus TCP/IP protocol, via an RJ45 port located on the back panel of the relay.
Embedded DeviceNet Protocol
- Allows the 469 to communicate to remote control centers via DeviceNet based networks, quite popular in industrial applications, particularly in factory automation.
Expanded Waveform capture
- Up to 128 cycles
Harsh Environment Conformal Coating option
- Conformal Coatingfor protection in chemically harsh and high humidity environments.
Protection & Control 
