RET670 ABB Transmission Transformer Protection Relay

Technical Specifications

Rated Frequency

• Frequency: 50/60 Hz

CT Inputs

• Rated Current: 1A or 5A
• Dynamic Range: Up to 100 x In

VT Inputs

• Rated Voltage: 100-220 V
• Frequency Range: 35-70 Hz

Power Supply

• Nominal Range: 48-250 V DC, 100-240 V AC
• Operative Range: 35-275 V DC, 85-264 V AC

Binary Inputs

• Threshold Voltage: 24-250 V DC

Binary Outputs

• Contact Ratings: Up to 250 V AC/DC, 8A

Communication Interfaces

• Ethernet: 100Base-FX, 100Base-TX
• Serial: RS-232, RS-485

Environmental Conditions

• Operating Temperature: -25°C to +55°C
• Storage Temperature: -40°C to +85°C
• Humidity: Up to 95% RH

Enclosure

• IP Rating: IP40 (front), IP20 (rear)
• Dimensions (W x H x D): 483 x 267 x 252 mm (19" rack)