GE Multilin T35 Transformer Management Relay
1. Overview
The GE Multilin T35 is a digital protection relay designed for power transformers, providing advanced monitoring, control, and fault protection for utility and industrial applications.
2. Key Functions
Transformer Protection:
Differential Protection (87T) – Detects internal faults (phase-to-phase, turn-to-turn).
Restricted Earth Fault (REF) Protection (64REF) – High-sensitivity ground fault detection.
Overcurrent Protection (50/51, 50N/51N) – Phase & neutral overcurrent with inverse-time curves.
Overload & Thermal Protection (49) – Prevents transformer overheating.
Inrush Restraint – Blocks false trips during transformer energization.
Monitoring & Control:
Real-Time Measurements (current, voltage, power, energy, harmonics, temperature).
Load Tap Changer (LTC) Monitoring & Control (optional).
Breaker Failure Protection (50BF) – Ensures backup tripping if primary breaker fails.
Automation & Communication:
FlexLogic™ Custom Logic – Programmable control schemes.
Event & Fault Recording (oscillography, sequence-of-events logging).
SCADA Integration – Supports IEC 61850, Modbus, DNP3, Ethernet.
3. Key Features
Dual-Breaker Support – Configurable for 1.5 or 2-breaker schemes.
High-Accuracy Synchrophasors (IEEE C37.118 compliant for PMU applications).
Cybersecurity – Role-based access, encryption, and secure protocols.
Industry-Leading Durability – Operates in harsh substation environments (-40°C to +85°C).
4. Applications
Utility Substations (transmission & distribution).
Industrial Power Transformers (steel, mining, data centers).
Renewable Energy Integration (wind/solar farm step-up transformers).
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