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Fault diagnostics are provided through pretrip data, event record, trace memory, and statistics. Prior to issuinga trip, the 469 takes a snapshot of the measured parameters and stores them with the cause of the trip. Thispre-trip data may be viewed using the [ NExT key before the trip is reset, or by accessing the A1 STATUS /LAST TRlP DATA actual values. The 469 event recorder stores up to 40 time and date stamped events includingthe pre-trip data. Each time a trip occurs, the 469 stores a trace of 8 cycles pre-trip and 8 cycles post-trip for almeasured AC quantities. Trip counters record the number of occurrences of each type of trip. vinimum andmaximum values for RTDs and analog inputs are also recorded. These features enable the operator to pinpointa problem quickly and with certainty.
Power metering is built into the 469 as a standard feature. The table below outines the metered parametersavailable either through the front panel or communications ports.
The 469 is equipped with 3 fully functional and independent communications ports. The front panel RS232 pormay be used for 469 setpoint programming, local interrogation or control, and upgrading of 469 firmware. TheComputer RS485 port may be connected to a PLC, DCS, or PC based user interface program. The AuxiliaryRS485 port may be used for redundancy or simultaneous interrogation and/or control from a second PLCDCS, or PC software.
There are also four 4 to 20 mA or 0 to 1 mA (as specified with order) transducer outputs that may be assignedto any measured parameter. The range of these outputs is scalable.

The 469 is packaged in the standard GE Power Management SR series arrangement, which consists of a dra-wout unit and a companion fixed case, The case provides mechanical protection to the unit and is used tomake permanent connections to all external equipment. The only electrical components mounted in the caseare those reguired to connect the unit to the external wiring. Connections in the case are fitted with mecha.nisms required to allow the safe removal of the relay unit from an energized panel (for example, automatic CTshorting). The unit is mechanically held in the case by pins on the locking handle that cannot be fully lowered tothe locked position until the electrical connections are completely mated. Any 469 can be installed in any 469case, except for custom manufactured units that are clearly identified as such on both case and unit, and areequipped with an index pin keying mechanism to prevent incorrect pairings.
No special ventilation requirements need to be observed during the installation of the unit. The 469 can becleaned with a damp cloth.

The SR469 motor protection system is part of the SR relay family and offers protection, control, simplified configuration and advanced communication features in a cost-effective, industry-leading pull-out construction. Designed for medium voltage motors, the 469 offers advanced protection with customizable overload curves and single CT differential protection for increased flexibility. The 469 also provides simplified configuration using the motor Setup autoconfigurator, providing quick and easy motor parameter Settings. Combined with advanced protection and diagnostic capabilities, the 469 provides users with the flexibility of multiple communication protocols, allowing integration into new and existing control networks.

Major advantage

Voltage dependent overload curve, torque measurement and protection, rotor bar break protection
State-of-the-art thermal model – multiple RTD inputs for stator thermal protection
Minimizes replacement time – withdrawable construction
Complete asset monitoring – temperature, analog I/O, full metering
Improve uptime of auxiliary devices – through I/O monitoring
Reduce troubleshooting time and maintenance costs – event reporting, waveform capture, data loggers
Built-in simulation simplifies testing and debugging
Cost-effective access to information – via standard RS232 and RS485 serial ports, as well as optional Ethernet and DeviceNet ports
Firmware and Settings can be updated on site
Optional Formal Coating for exposure

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
• Protection and Management of three phase medium and large horsepower motors and

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

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

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