ABB|REF543|Feeder Protection Relay
Description
The ABB REF543 is a numerical feeder protection relay designed for the protection, control, and monitoring of medium-voltage feeders in utility and industrial distribution systems.
Features
Comprehensive feeder protection
Configurable control functions
Multiple communication protocols
User-friendly interface with LCD
Technical Specifications
Manufacturer
ABB
Rated Voltage
100–240 V AC, 48–250 V DC
Rated Frequency
50/60 Hz
Analog Inputs
4 current inputs (1 A or 5 A), 1 voltage input
Digital Inputs
8 (configurable)
Digital Outputs
6 (including trip and alarm)
Communication Interfaces
IEC 61850, Modbus RTU/TCP, DNP3
Protection Functions
Overcurrent, earth-fault, directional protection, auto-reclosing
Measurement Accuracy
±2% for current, ±0.5% for voltage
Operating Temperature
-25°C to +55°C
Storage Temperature
-40°C to +85°C
Protection Rating
IP54 (front), IP20 (rear)
Dimensions
177 mm x 177 mm x 164 mm
Weight
Approximately 3.5 kg
ABB|REF543|Feeder Protection Relay
ABB|REF543|Feeder Protection Relay
Description
The ABB REF543 is a numerical feeder protection relay designed for the protection, control, and monitoring of medium-voltage feeders in utility and industrial distribution systems.
Features
Comprehensive feeder protection
Configurable control functions
Multiple communication protocols
User-friendly interface with LCD
Technical Specifications
Manufacturer
ABB
Rated Voltage
100–240 V AC, 48–250 V DC
Rated Frequency
50/60 Hz
Analog Inputs
4 current inputs (1 A or 5 A), 1 voltage input
Digital Inputs
8 (configurable)
Digital Outputs
6 (including trip and alarm)
Communication Interfaces
IEC 61850, Modbus RTU/TCP, DNP3
Protection Functions
Overcurrent, earth-fault, directional protection, auto-reclosing
Measurement Accuracy
±2% for current, ±0.5% for voltage
Operating Temperature
-25°C to +55°C
Storage Temperature
-40°C to +85°C
Protection Rating
IP54 (front), IP20 (rear)
Dimensions
177 mm x 177 mm x 164 mm
Weight
Approximately 3.5 kg
