ProtectionLine differential protection and related measurements, stabilized low-set stage ●Line differential protection and related measurements, instantaneous high-set stage ●Three-phase non-directional overcurrent, low-set stage ●Three-phase non-directional overcurrent, high-set stage, instance 1 ●Three-phase non-directional overcurrent, high-set stage, instance 2 ●Three-phase non-directional overcurrent, instantaneous stage ●Negative-sequence overcurrent, instance 1 ●Negative-sequence overcurrent, instance 2 ●Circuit breaker failure protection ●Three-phase inrush current detection ●Binary signal transfer ●ControlCircuit breaker control with interlocking ●Supervision and MonitoringTrip-circuit supervision of two trip circuits ●Local and remote phase currents (protection co-ordinated) ●Current circuit supervision ●Protection communication supervision ●MeasurementTransient disturbance recorder ●Three-phase current measurement ●Current sequence components ●Differential current measurement ●Bias current measurement ●3.3.2 Optional functionsThe optional functions available in the IED are:• Modbus TCP/IP or RTU/ASCII3.4 Physical hardwareThe IED consists of two main parts: plug-in unit and case. The plug-in unit contentdepends on the ordered functionality.Section 3 1MRS756499 ARED615 overview16 RED615Operation Manual
