REF601

Overview

REF601 is an ABB feeder protection and control relay designed for reliable power system operation, supporting a wide auxiliary voltage range and flexible binary inputs.

Power Supply

• Nominal auxiliary voltage (Uaux): 24…240 V AC (50/60 Hz), 24…240 V DC

• Uaux variation: 85…110% of Uaux (20.4…264 V AC), 70…120% of Uaux (DC)

• Burden (quiescent/operating): < 12.0 VA

• Ripple in DC auxiliary voltage: Max 12% of DC value (100 Hz)

• Maximum interruption time: 50 ms at rated Uaux DC without relay reset

Binary Input

• Rated voltage: 24…240 V AC/DC

• Operating range: 85…110% of Un (AC), 70…120% of Un (DC)

• Current drain: 2…20 mA

• Power consumption per input: < 0.5 W

• Input sensing time: 25 ms

Trip-Circuit Supervision (TCS, BI2)

• Control voltage range: 48…250 V AC/DC

• Current drain (supervision circuit): ~1.5 mA

• Minimum voltage over TCS contact: 20 V AC/DC (15…20 V)

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