ABB REF615 Feeder Protection and Control Relay

Reliable Protection for Distribution Feeders

The ABB REF615 is a compact and intelligent feeder protection and control relay designed for industrial and utility power distribution systems. As part of the ABB Relion 615 series, it provides comprehensive protection, measurement, and control for radial and loop networks. Its modular hardware structure and flexible configuration make it ideal for both new installations and retrofit projects.

Technical Specifications

Specification	Description
Manufacturer	ABB
Series	Relion 615
Model	REF615
Document ID	1MRS756379
Product Version	5.0 FP1
Revision	U
Category	Feeder Protection and Control Relay
Nominal Auxiliary Voltage (AC)	100, 110, 120, 220, 240 V AC (50/60 Hz)
Nominal Auxiliary Voltage (DC)	24, 30, 48, 60, 110, 125, 220, 250 V DC
Auxiliary Voltage Range (AC)	38…110% of Uₙ (38…264 V AC)
Auxiliary Voltage Range (DC)	50…120% of Uₙ (12…72 V DC), 80…120% (38.4…300 V DC)
Start-up Threshold	19.2 V DC (80% of 24 V DC)
Power Consumption	DC <13.0 W nominal / <18.0 W max; AC <16.0 W nominal / <21.0 W max
Ripple in DC Supply	Max 15% (100 Hz)
Fuse Type	T4A / 250 V
Rated Frequency	50 / 60 Hz

Current and Voltage Inputs

Parameter	Value
Rated Current (Iₙ)	0.2/1 A or 1/5 A
Thermal Withstand (Continuous)	4 A / 20 A
Thermal Withstand (1 s)	100 A / 500 A
Dynamic Current Withstand	250 A / 1250 A (half-wave)
Input Impedance	<100 mΩ (0.2/1 A) / <20 mΩ (1/5 A)
Voltage Input Range	60…210 V AC
Voltage Withstand (Continuous)	240 V AC
Voltage Withstand (10 s)	360 V AC
Burden at Rated Voltage	<0.05 VA

Sensor Input Module (SIM0002)

Parameter	Value
Current Sensor Input Range	75 mV…9000 mV
Continuous Voltage Withstand	125 V
Input Impedance (Current)	2…3 MΩ (50/60 Hz)
Voltage Sensor Input Range	346 mV…1733 mV
Continuous Voltage Withstand (Voltage Input)	50 V
Input Impedance (Voltage)	3 MΩ (50/60 Hz)

Dimensions and Weight

Description	Value
Frame Width	177 mm
Case Width	164 mm
Frame Height	177 mm (4U)
Case Height	160 mm
Depth	201 mm (153 + 48 mm)
Weight (Complete Unit)	4.1 kg
Weight (Plug-in Module Only)	2.1 kg

Key Features and Benefits

The REF615 delivers fast and accurate fault detection with flexible communication protocols such as IEC 61850. Its high thermal withstand and wide input tolerance ensure stable performance under dynamic system loads. Engineers choose this model for its plug-in modular design, which simplifies maintenance and enables quick relay replacement without disturbing wiring. The relay’s intelligent measurement functions improve network visibility and operational safety.