Numerical Protection Relay

Model Number

PAC-P100

PAC-P100: Feeder Protection & Control Unit

Feeder Protection and Control Unit, PAC-P100, is a digital relay intended for the management and primary protection of distribution feeders. It can also be used for the backup protection of busses and transformers. PAC-P100 includes the protection elements of instantaneous/time-delayed phase overcurrent, instantaneous/time-delayed ground overcurrent, selective ground overcurrent, phase undervoltage, phase overvoltage, instantaneous/time-delayed ground overvoltage, and cold load pickup. TC characteristics provide 4 IEC standard curves, 2 KEPCO's electromagnetic style curves, and 2 P&C style curves for UVR and OVR. Electric values are measured for 3 phase voltages, 3 phase currents, A/B/C phase measurements (voltage, current, apparent/active/reactive power), total measurements (3-pahse apparent/ active/ reactive power, frequency, power factor), and energy (kWh, kVARh, kVAh). PAC-P100 has event & fault recording functions and remote control function of circuit breaker through SCADA communication. EasyLogic of PAC-P100 has 16 configurable logic components and makes it easy to compose sequence logic internally without external hardware construction.

Features

• Digital feeder protection and control relay using 2 microprocessors.
• Backup protection for bus and transformer.
• 8 protection elements: OCR, OCGR, SGR, UVR, OVR, OVGR, NSOVR, Cold Load Pickup
• Various TC curves including 4 IEC standard curves (NI, VI, EI, LI), 2 KEPCO's EM-type curves (KEPCO NI, KEPCO VI),
• 2 P&C style curves for UVR & OVR.
• Control functions of CB open/close and local/remote.
• Measurements of 3 phase voltages/currents, 3 phase active/reactive/ apparent power, Watt-hour/Var-hour/ VA-hour, frequency, power factor, THD (Total Harmonic Distortion), and harmonics up to 31st.
• Event recording up to 512 events and fault waveforms recording at 64 samples/cycle.
• Engineering tools (Easy Operation & Analysis PC S/W) for settings correction, event list, and fault waveforms analysis.
• Graphic LCD (240-128, 30 characters & 16 lines) for single line diagram, harmonics bar graph, and tree menu 6 indicating LEDs, 4 arrow keys, and 7 control/reset/menu keypad buttons.
• 1 RS232 port on front-face panel (correcting setting values, uploading events/fault data, and monitoring measured values) and 2 RS485 ports on rear-side (communicating with SCADA through DNP3.0 protocol).
• Self-diagnosis functions including supervisions of DC power, CPU/DSP and memory, Watchdog, settings range, A/D converter, analog input circuits and digital I/O circuits.
• EasyLogic for sequence logic composition using 16 configurable logic components. ØSelf-test functions including output contacts and display panel.
• Flash memory for adding new functions and upgrading S/W.
• Free selection of control source voltage (AC/DC.110~220V), 2 frequencies (50/60Hz).
• Auto-calibration for analog input parts. Security checking by password on settings correction and control.