The ABB HIEE401481R1 is indeed a crucial component within the ABB UAC326 excitation system, serving as a relay interface board that facilitates communication between the excitation system and the generator protection system. Here’s a breakdown of its key features and technical specifications:

Key Features

• Relay interface board designed for the ABB UAC326 excitation system.
• Interfaces between the excitation system and the generator protection system.
• Incorporates multiple relays to safeguard the generator against faults.
• Complies with international standards ensuring safety and reliability.

Technical Specifications

• Input Voltage: 24 VDC
• Output Voltage: 24 VDC
• Input Current: 5 A
• Output Current: 5 A
• Operating Temperature: -40°C to +85°C
• Storage Temperature: -55°C to +90°C
• Humidity: 5% to 95% RH
• Dimensions: 200 mm x 100 mm x 50 mm
• Weight: 1 kg