Application
The RCS-9647C is a digital protection relay, designed for protection, control and monitoring of the reactors in the distribution system with differential protection as main protection, backup protection and mechanical protection. It is fully compatible with IEC 61850 communication.
Functions
l Unrestraint current differential protection. (87UR)
l Percentage restraint current differential protection. (87PR)
l Four-level overcurrent protection. (50P, 51P)
l Ground detector protection. (64)
l Non-electrical quantity protection. (NE)
l Thermal overload protection. (49)
l Underfrequency alarm function (81)
l Eight (8) binary inputs.
l Circuit breaker control.
l Analog quantity measurements.
l Four (4) pulse accumulating inputs.
l Circuit breaker monitoring.
l CT failure detection logic.
l VT failure detection logic.
l Voltage and current drift auto adjustment.
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: 2 Ethernet interfaces with IEC 61850 or 2 RS-485 with IEC 60870-5-103, 1 RS-485 for clock synchronization, 1 RS-485/232 for communication to printer.
l The typical operating time of differential protection is less than 25ms.It is the main protection for phase fault or inter-turn fault.
l Definite time and inverse time characteristics of overcurrent protection are both provided.
l Ground detector protection constitutes of zero sequence overcurrent protection and zero sequence voltage protection.
l The RCS-9647 relay constantly measures a large mount of analog quantities, such as phase voltage, phase-to-phase voltage, phase 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.
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