Alstom EP3-G-4-A
Electronic Protection Relay
Product Overview
The Alstom EP3-G-4-A is a versatile electronic protection relay designed for the supervision and protection of electrical networks and equipment in industrial and railway applications. This compact device combines multiple protection functions with precise measurement capabilities, ensuring reliable operation and rapid fault detection. Its robust construction and wide operating temperature range make it suitable for harsh environmental conditions.
Key Features
- • Multi-functional protection (overcurrent, earth fault, overvoltage)
 - • High-speed tripping for fault clearance (≤50ms)
 - • Configurable settings via front panel or software
 - • Integrated data logging and event recording
 - • Communication interface for system integration
 - • Compact design for panel mounting in control cabinets
 
Technical Specifications
| Parameter | Details | 
|---|---|
| Input Current | 0-5A AC (via current transformers) | 
| Input Voltage | 100-400V AC (phase-to-phase or phase-to-neutral) | 
| Power Supply | 24V DC or 110/230V AC | 
| Communication | RS-485 (Modbus RTU) | 
| Operating Temperature | -25°C to +70°C (-13°F to +158°F) | 
| Protection Rating | IP20 (front panel) | 
Typical Applications
- Railway traction power systems
 - Industrial distribution networks
 - Substation protection and control
 - Marine electrical systems
 - Renewable energy installations
 - Critical infrastructure power networks
 
