RELAY > Over Current & Earth Fault relay

  • 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.

  • Numerical Draw-out 2 Over Current & 1 Earth Fault

    Model No : PNA422-D

    Relay has modbus protocol with RS 485 port with baud rate 9600bps. Another
    model is established for special applications with baud rate115kbps.Relay records 99 faults
    with date and time. Relay rating (In) is field selectable- either 1A/5A.The output relays are
    configurable Configurable options for enabling & disabling of high-set in both Phase &
    earth.

  • Numerical Draw-out 3 Over Current

    Model No : PNA430-D

    PNA TYPE IDMT/DEFINITE TIME/INSTANTANEOUS LOW-SET/HIGH-SET DIRECTIONAL
    NUMERICAL/MICROPROCESSOR BASED OVER CURRENT RELAY (OCT) WITH EARTH FAULT RELAY
    (EFR) receives the input current signals (phase current and neutral current) via four input
    current transformers. These signals are galvanically de-coupled, suitably filtered and fed to
    the micro-controller, for amplitude calculation and further logical processing.

  • Numerical Draw-out 1 Over Current

    Model No : PNA410-D

    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 application 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.

  • Numerical Draw-out 1 Earth Fault

    Model No : PNA402-D

    The micro-controller continuously monitors the magnitude of the phase current and
    the neutral current .whenever the phase current or the earth current magnitude exceeds the
    present value corresponding line / earth element will pick up and relay will trip after time
    interval calculated by the selected IDMT curves. Whenever the fault level exceeds the
    selected high set range, the relay will trip for high set, ignoring the selected IDMT curves. The
    timer logic is processed and after comparison with set time schedules, tripping signals are
    issued accordingly. There are two output relays , each output relay has two change over
    contacts either for alarm or tripping. The output relays are programmable.
    The relay rating (In) is field selectable either 1A or 5A. The relay has RS 485 com port which can
    be used with modbus protocol for communication purposes.

  • Numerical Draw-out 3 O/C & 1 E/F with Auto Reclosure

    Model No : PNA442AR

    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.

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

    Model No : PNA442-ND

    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 application 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.

  • Numerical Draw-out 2 Over Current & 1 Earth Fault

    Model No : PNA422-ND

    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.

  • Numerical Draw-out 3 Over Current

    Model No : PNA430-ND

    Relay has modbus protocol with RS 485 port with baud rate 9600bps. Another
    model is established for special applications with baud rate115kbps.Relay records 99 faults
    with date and time. Relay rating (In) is field selectable- either 1A/5A.The output relays are
    configurable Configurable options for enabling & disabling of high-set in both Phase &
    earth.


    PNA TYPE IDMT/DEFINITE TIME/INSTANTANEOUS LOW-SET/HIGH-SET DIRECTIONAL
    NUMERICAL/MICROPROCESSOR BASED OVER CURRENT RELAY (OCT) WITH EARTH FAULT RELAY
    (EFR) receives the input current signals (phase current and neutral current) via four input
    current transformers. These signals are galvanically de-coupled, suitably filtered and fed to
    the micro-controller, for amplitude calculation and further logical processing.

  • Numerical Draw-out 1 Over Current

    Model No : PNA410-ND

    The micro-controller continuously monitors the magnitude of the phase current and
    the neutral current .whenever the phase current or the earth current magnitude exceeds the
    present value corresponding line / earth element will pick up and relay will trip after time
    interval calculated by the selected IDMT curves. Whenever the fault level exceeds the
    selected high set range, the relay will trip for high set, ignoring the selected IDMT curves. The
    timer logic is processed and after comparison with set time schedules, tripping signals are
    issued accordingly. There are two output relays , each output relay has two change over
    contacts either for alarm or tripping. The output relays are programmable.
    The relay rating (In) is field selectable either 1A or 5A. The relay has RS 485 com port which can
    be used with modbus protocol for communication purposes.

  • Numerical Draw-out 1 Earth Fault

    Model No : PNA402-ND

    Relay has modbus protocol with RS 485 port with baud rate 9600bps. Another
    model is established for special applications with baud rate115kbps.Relay records 99 faults
    with date and time. Relay rating (In) is field selectable- either 1A/5A.The output relays are
    configurable Configurable options for enabling & disabling of high-set in both Phase &
    earth.


    PNA TYPE IDMT/DEFINITE TIME/INSTANTANEOUS LOW-SET/HIGH-SET DIRECTIONAL
    NUMERICAL/MICROPROCESSOR BASED OVER CURRENT RELAY (OCT) WITH EARTH FAULT RELAY
    (EFR) receives the input current signals (phase current and neutral current) via four input
    current transformers. These signals are galvanically de-coupled, suitably filtered and fed to
    the micro-controller, for amplitude calculation and further logical processing

  • Numerical Draw-out 3 O/C & 1 E/F

    Model No : PD442-ND

    The micro-controller continuously monitors the magnitude of the phase current and
    the neutral current .whenever the phase current or the earth current magnitude exceeds the
    present value corresponding line / earth element will pick up and relay will trip after time
    interval calculated by the selected IDMT curves. Whenever the fault level exceeds the
    selected high set range, the relay will trip for high set, ignoring the selected IDMT curves. The
    timer logic is processed and after comparison with set time schedules, tripping signals are
    issued accordingly. There are two output relays , each output relay has two change over
    contacts either for alarm or tripping. The output relays are programmable.
    The relay rating (In) is field selectable either 1A or 5A. The relay has RS 485 com port which can
    be used with modbus protocol for communication purposes.

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