Numerical Over Current Relay OCR

• Three phase , low-set, non-directional Over Current relay with Inverse definite minimum time (IDMT) or Definite time characteristics.
• Three phase, high-set, non-directional Over Current relay with Instantaneous or Definite time function.
• Low-set non-directional Earth fault Relay with Inverse definite minimum time (IDMT) or Definite time characteristics.
• High-set non-directional Earth Fault Relay with Instantaneous time or Definite time function.
• Modular Integrated Draw Out System for field adaptability and tropicalised design (MIDOS).
• Password protection.
• 2 line 16 characters Industrial grade LCD with back-lit module for numerical display of setting values and measured values which is user friendly.
• Trips for default/previously selected curve if the fault occurs during settings of the relay.
• Membrane key pad for easy operation, dust proof front panel.
• Enabling / Disabling of high-set.
• LED indications for Power , Pick-up, Phase Fault trip or Earth Fault trip for IDMT and high-set.
• RS-485 communication port with modbus protocol.
• Relay test facility with relay trip & without relay trip.
• Separate heavy duly output contacts provided for time delayed Phase fault with high-set and time delayed Earth Fault with high-set.

Applications:

The IDMT/DEFINITE TIME/INSTANTANEOUS LOW-SET/HIGH-SET NON-DIRECTIONAL NUMERICAL/MICROPROCESSOR BASED OVER CURRENT RELAY (OCR) WITH EARTH FAULT RELAY (EFR) of KP Series PNA TYPE is extensively used for selective Short Circuit and Earth Fault Protection of radial feeders in solidly earthed, resistance earthed or impedance earthed power systems. It has wide applications in Substations & Industrial networks.

The IDMT/DEFINITE TIME/INSTANTANEOUS LOW-SET/HIGH-SET NON-DIRECTIONAL NUMERICAL/MICROPROCESSOR BASED OVER CURRENT RELAY (OCR) WITH EARTH FAULT RELAY (EFR) of PNA TYPE can also be used in most applications where Inverse time, Definite time and Instantaneous relays are required. The relay gives selective phase and earth fault protection in time graded systems for transformers, motor etc. If ensures reliable protective system and clears only the faulted section.