GE Multilin
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Buy GE Multilin 745

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• Call 1-866-725-3771 or
• 713-222-9191 in Houston, TX
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Reference Material

• SR 745 Motor Protection System Brochure

Motor & Metering

• Simulation mode and playback capability.
• Metering - current, voltage, sequence components per winding, power, energy, voltage
• Oscillography & Data Logger - 10 records up to 32 power cycles
• THD and harmonics up to the 21st
• Analog transducer input
• Ambient temperature /analog transducer input
• Expanded (doubled) sequence of event recorder and waveform capture (256 time stamped events and up to 128 cycles of oscillography data at a sampling rate of 64 samples per power cycle)
• Tap position up to 50 tap positions

GE Multilin 745 Transformer Protection System

SR745 Transformer Management Relay - High-Speed, Draw-Out Transformer Protection & Management

The GE Multilin 745 Transformer Protection System is a full featured transformer protection relay, suitable for application on small, medium, and large power transformers. The 745 can be applied on two-winding and three-winding transformers. Uses multiple current and voltage inputs to provide primary protection and back-up protection of transformers, including differential, ground differential phase, neutral, and ground overcurrent, over-fluxing, and on-load tap changer.

SR745 Transformer Protection System Features

• Minimize maintenance time with draw-out capability
• Easy to use Transformer Protection supported by industry leading suite of software tools
• Security Audit Trail provides detailed traceability for system configuration changes
• Improved security for transformer energization
• Optional conformal coating for chemically corrosive and humid environments
• Accurate built-in metering functions
• Modbus and DNP 3.0 Level 2 protocols through embedded Ethernet, standard RS232, RS485 & RS422 serial ports
• Advanced FlexLogic automation capabilities
• Built in simulation features for setpoint verification
• Fast, flexible and reliable communications
• IRIG-B time synchronization, event reports, waveform capture, data logger

GE Multilin SR745 Transformer Management Relay Applications

• Stand-alone or component in automated substation control system
• Primary and back-up protection and management of small, medium and larger power transformers, autotransformers and reactors
• Transformer asset monitoring using Hottest Spot, Loss-of-Life and Aging Factor

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Protection & Control

The 745 Transformer Protection System is a full featured transformer protection relay, suitable for application on small, medium, and large power transformers. The 745 can be applied on two-winding and three-winding transformers, and can be applied on transformers with breaker-and-a-half source terminals. Multiple current and voltage inputs are used to provide primary protection, control and back-up protection of transformers, including current differential, Restricted Ground Fault neutral, and ground overcurrent, over-fluxing, and on-load tap changer. The 745 also has specific features for industrial environments, including a drawout case to limit downtime during maintenance and conformal coating for harsh environments. The 745 also includes analog inputs and outputs, while incorporating advanced features such as transformer loss of life monitoring.

GE Multilin 745 Features & Benefits

• Transformer overload protection
• Variable dual-slope percent differential protection
• Restricted Ground Fault Protection
• Magnetizing inrush and overexcitation blocking
• Overexcitation (V/Hz) Protection
• Phase & ground overcurrent elements
• Frequency rate-of-change Detection
• Adaptive time overcurrent using FlexCurves elements
• Underfrequency/Overfrequency Protection