GE 745-W3-P511-G51-HI-R-E-H Transformer Protection System
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. It uses multiple current and voltage inputs to provide primary protection and backup protection of transformers, including differential, ground differential phase, neutral, and ground overcurrent, over-fluxing, and on-load tap changer protection.
User-Friendly Operation: Easy-to-use transformer protection supported by an industry-leading suite of software tools
Enhanced Transformer Security: Improved protection during transformer energization
Accurate Metering: Built-in measurement and monitoring functions
Advanced Automation: FlexLogic automation capabilities for custom protection schemes
Reliable Communication: Fast, flexible communications with IRIG-B time synchronization, event reports, waveform capture, and data logging
Simulation & Verification: Built-in simulation features for setpoint testing
Environmental Resilience: Optional conformal coating for chemically corrosive and humid environments
Maintenance Efficiency: Minimize downtime with draw-out capability
Protection Capabilities
Variable Dual-Slope Percent Differential Protection for precise transformer fault detection
Magnetizing Inrush & Overexcitation Blocking to prevent false tripping
Phase & Ground Overcurrent Elements for comprehensive current protection
Adaptive Time Overcurrent Protection using FlexCurves elements
Underfrequency & Overfrequency Protection for abnormal operating conditions
Frequency Rate-of-Change Detection for dynamic system monitoring
Overexcitation (V/Hz) Protection to safeguard transformer core
Restricted Ground Fault Protection for sensitive fault detection
Transformer Overload Protection to prevent thermal damage
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