ABB REF615 L User Manual

t[s] Reset time (in seconds)
k set Time multiplier
I Measured current
I> set Start value
Table 660: Coefficients for ANSI delayed inverse reset curves
Curve name D
(1) ANSI Extremely Inverse 29.1
(2) ANSI Very Inverse 21.6
(3) ANSI Normal Inverse 0.46
(4) ANSI Moderately Inverse 4.85
(6) Long Time Extremely Inverse 30
(7) Long Time Very Inverse 13.46
(8) Long Time Inverse 4.6
Section 11 1YHT530004D05 D
General function block features
818 615 series
Technical Manual

ABB REF615 L Specifications

General

Type	Feeder Protection Relay
Rated Frequency	50/60 Hz
Weight	Approx. 1.5 kg
Communication Protocols	IEC 61850, Modbus RTU, DNP3
Protection Functions	Overcurrent, Earth fault, Thermal overload, Under/Over voltage, Under/Over frequency
Enclosure	IP20