GE G30U03HKH Generator Protection System

Product Overview

The GE Multilin G30U03HKH is a high-performance Generator Protection Relay within the Universal Relay (UR) family. It is specifically engineered to provide comprehensive protection and management for small to medium-sized generators. 

Technical Specifications

• Part Number: G30U03HKH

• Manufacturer: GE (General Electric)

• Series: UR (Universal Relay) - G30

• Primary Functions: Differential (87G), Overcurrent (50/51), Reverse Power (32), Loss-of-Field (40).

• Power Supply: Universal (24-250 VDC or 90-250 VAC)

• Communication: IEC 61850, Modbus TCP/IP, DNP 3.0, Ethernet, RS485.

• Display: Full-color HMI for real-time visualization.

• I/O: Modular digital and analog inputs/outputs.

• Logic: Programmable FlexLogic™ for custom automation schemes.

Key Features & Engineering Advantages

• Total Winding Protection: Provides ultra-fast Generator Winding Differential (87G) protection, detecting internal faults before they cause catastrophic mechanical and thermal damage.

• Integrated Monitoring Suite: Beyond simple protection, the G30 monitors Reverse Power (to prevent motoring), Loss-of-Field, and Over-excitation, shielding the generator from every critical operating anomaly.

• Advanced Color HMI: The high-resolution display allows operators to view phasor diagrams and event logs directly at the device, significantly speeding up fault diagnostics without a laptop.

• Deterministic FlexLogic™: Allows engineers to program complex bay interlocking and breaker control sequences directly into the relay, reducing the need for external PLCs or auxiliary wiring.

• High-Resolution Oscillography: Automatically captures high-speed disturbance data during a trip, providing essential waveforms for post-fault analysis and regulatory reporting.

• Substation-Hardened Design: Tested to withstand extreme temperature swings and high-frequency transients, ensuring a service life exceeding 20 years in industrial environments.