Product Details

  • Numerical Draw-out 3 Over Current & 1 Earth Fault

    Model No : PNA442-D


    Prok dv's make PNA TYPE IDMT/DEFINITE TIME/INSTANTANEOUS LOW-SET/HIGH-SET NONDIRECTIONAL
    NUMERICAL/MICROPROCESSOR BASED OVER CURRENT RELAY (OCR) WITH
    EARTH FAULT RELAY (EFR) or independent over current Relay (OCR) or earth fault relay (EFR).
    This is intended for protection application in medium voltage networks. These networks may
    have isolated or resistance impedance earthed or solidly earthed neutral points. Definite
    time over current relays are both suited for isolated systems and for use as back up to
    differential relays and distance relays. Inverse time relays (over current relays with various
    inverse times - current characteristics) are advantageous for interconnected systems and
    solidly grounded systems. Another tool for reducing the tripping time for faults near the
    source is to use the added instantaneous ( high set ) feature in the numeric relay .if the fault
    occurs during the setting of relay ,the relay shall operate / trip for the previously selected /
    default settings.

    Specification

    • Three phase , low-set, non - directional Over current relay with inverse definite minimum time (IDMT) or definite time characteristics
    • RS-485 communication port with modbus protocol
    • Password protection
    • 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)
    • 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 o f High-Set

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