l Three-zone phase-to-phase distance protection. (21P)
l Three-level overcurrent protection. (50P, 51P)
l Zero sequence overcurrent protection. (50G or 51G)
l Under frequency protection. (81)
l Frequency rate-of-change element. (7F)
l Switch-on-to-fault (SOFT) logic.
l Overload protection.
l Synchronism check. (25)
l Auto-reclosing (three-pole). (79)
l Power swing blocking. (68)
l Accelerated tripping during unsymmetrical faults.
l Accelerated tripping during double circuit line faults.
l Seven (7) binary inputs.
l Circuit breaker control.
l Ten (10) analog quantity measurements.
l Four (4) pulse accumulating inputs.
l Circuit breaker monitoring.
l CT failure detection logic.
l VT failure detection logic.
l Line voltage failure adjustment.
l Voltage and current drift auto regulation.
l Self diagnostic test.
l GPS clock synchronization.
l Fault Recorder.
l 64 tripping reports and 256 SOE (Sequence of Events) records.
l High resolution oscillography of last 8 oscillograms (compatible with international COMTRADE format)
l Rear communication ports: Ethernet (Optional), 2 RS-485 or 2 Worldfip bus interfaces with IEC 60870-5-103 protocol, 1 RS-485 with clock synchronization, 1 RS-485 with printer.
l The built-in reliable power swing blocking logic can properly supervise the distance elements
during a power swing.
The power swing blocking logic can make the relay untrip for an external fault during a power
swing and pickup for an internal fault.
l Under frequency protection that could be supervised by rate-of-change element would shed loads before out-of-step.
l The RCS-9615 relay constantly measures a large mount of analog quantities, such as phase voltage, phase-to-phase voltage, neutral voltage, phase current, neutral current, active power, reactive power, power factor and frequency.
l The relay can monitor the status and record the number of switching times of the circuit breaker.
l On the premise of 24 samples per cycle, all data measurement, calculation and logic discrimination could be done within one sampling period. The event recording and protection logic calculation are completed simultaneously.
l The relay provides GPS clock synchronization, including second pulse and IRIG-B synchronization.
l The HMI interface with a LCD and a 9-button keypad on the front panel is friendly to users.
l The format of event report is compatible with international COMTRADE file.
l The relay is equipped with Ethernet ports with the IEC 61850 protocol and RS-485 ports and IEC 60870-5-103 protocol.