Series 80 G87 Generator Differential Protection Relay | Multifunctional Digital Generator Protection Relay for Power System

🎯 Product Overview

The Series 80 G87 Generator Differential Protection Relay is a high-performance digital protection relay specifically designed for synchronous generator and generator-transformer unit protection in power plants, hydroelectric power stations and thermal power generation systems. It integrates differential protection, overcurrent protection, and system monitoring functions into a compact modular design, providing fast, accurate fault detection and isolation to protect your generator assets from internal winding faults, short circuits and other electrical faults.

⚡ Core Protection Functions

✅ Main Generator Differential Protection (G87)

Real-time differential current detection for stator windings, with high sensitivity and fast tripping (action time < 30ms)

Built-in through-fault stabilization, avoids false tripping caused by external short-circuit current inrush

Supports percentage differential characteristic, adapts to generator operating conditions at different loads

✅ Additional Comprehensive Protection Functions

Stator ground fault protection and rotor earth fault alarm

Overcurrent, overvoltage and under voltage protection

Negative sequence overcurrent protection for unbalance loading

Reverse power protection and out-of-step protection

Startup and shutdown sequence monitoring

✅ Digital Intelligent Design Advantages

16-bit high-precision AD sampling, accurate measurement of voltage/current/frequency

Supports Modbus RTU/DNP 3.0/IEC 60870-5-104 communication protocols, easy to connect to SCADA system

Large LCD local display + button operation, convenient for on-site parameter setting and fault query

Event recording function, records up to 500 fault events for traceability

📋 Basic Technical Specifications

🏭 Application Scenarios

🔹 Thermal Power Plants: Protection for steam turbine generators of different capacity levels

🔹 Hydropower Stations: Differential protection for hydro turbine generators

🔹 Gas Turbine Power Plants: Protection for small and medium-sized gas generator units

🔹 Industrial Cogeneration: Generator protection for factory self-provided power plants

🔹 Renewable Energy: Biomass power generation, small hydropower generator protection

🤝 Our Advantages

✅ All products undergo strict factory electrical performance testing before delivery, stable and reliable quality

✅ Professional engineering team provides technical support for parameter setting and on-site debugging

✅ Fast global delivery from our Chinese warehouse, supports flexible order quantities for project needs

✅ Accept OEM customization according to your specific project requirements

✅ 12-month product warranty, lifetime after-sales technical support