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Ground fault detectors for ungrounded arrays less than 100 kW

  • Description
  • Features
  • Applications
  • Ordering Info
  • Downloads
  • Accessories
  • isoPV425

    Digital ground fault detector for ungrounded solar arrays up to 100 kW

    This device meets or exceeds the requirements of NEC 690.35 and CEC 64-018(1)(e) for ground fault detection on ungrounded solar arrays.

    Designed specifically for photovoltaic systems 100 kW and below, the isoPV425 ground fault detector provides early indication of ground faults before leakage current may even be present. The device detects both AC and DC ground faults by monitoring the system's insulation resistance. The isoPV425 and AGH420 can connect to systems up to 690 VAC / 1000 VDC.

    Insulation resistance values are displayed in real-time on the device's LCD display. Additional overvoltage and undervoltage detection are available, with voltage measurements from positive to ground and negative to ground when connected to DC. Two single pole contacts are available, which may be set to normally energized (failsafe) or normally deenergized (non-failsafe) mode. An RS-485 interface is available for connection to remote BENDER communication gateways. For advanced users, separately adjustable values for resistance and impedance are available as well.

    The isoPV425 may also be used for determining PV system isolation prior to startup on both grounded and ungrounded solar arrays, per the upcoming 2014 requirements of NEC 690.5(A)(1) and NEC 690.35(C)(1).

  • Key Features: isoPV425

    • Meets requirements of NEC 690.35 and CEC 64-018(1)(e) for ground fault detection on ungrounded solar arrays
    • Early indication of both AC and DC ground faults on the array side of the isolated system
    • Connects to DC arrays up to 1000 VDC
    • Designed specifically for photovoltaic systems
    • Two separately adjustable insulation resistance response values
    • Additionally provides readings of voltage to ground (+ to GND and - to GND)
    • Additional overvoltage and undervoltage alarms available
    • Works on systems with up to 500 μF
    • Digital display showing readings in real-time
    • Easy-to-use, onboard menu for managing settings
    • Automatic self-test
    • Analog output
    • Built-in test and reset buttons
    • Connections for external test and reset
    • Latching or non-latching operation, selectable
    • Two single pole contact outputs, normally energized or normally de-energized operation
    • Compatibility with BENDER's remote communication system
  • Applications: isoPV425

    • Isolated (ungrounded) solar arrays 100 kW or less
    • AC systems, single- and three-phase
    • Pure DC and mixed AC/DC systems
    • Systems with high leakage capacitances
    • Multiple ungrounded systems connected via tiebreaker / interlock
  • Ordering information: isoPV425

    NameResponse ValueSupply VoltageOrdering Number
    isoPV425-D4 and AGH4201 - 500 kΩ AC 100 - 240 V (41 - 63 Hz) DC 24 - 240 V B91036303
  • Downloads: isoPV425

    Document Name Language Date Download
    Technical Bulletin / Datasheet
    isoPV425 and AGH420
    English 08.2013
    Download
    Menu Overview / Settings Checklist
    isoPV425 and AGH420
    English 08.2013
    Download
    User Manual
    isoPV425 and AGH420
    English 08.2013
    Download
    Brochure
    Ground Fault Protection in PV Systems
    English 07.2016
    Download
  • Accessories: isoPV425

  • Description
  • Features
  • Applications
  • Ordering Info
  • Downloads
  • Accessories
  • isoPV

    Digital ground fault detector for ungrounded solar arrays

    This device meets or exceeds the requirements of NEC 690.35 and CEC 64-018(1)(e) for ground fault detection on ungrounded solar arrays, as well as the upcoming 2014 requirements for array isolation testing prior to startup.

    The isoPV detects ground faults in isolated (ungrounded) solar arrays up to 793 VAC / 1100 VDC. The iso-PV monitors for ground faults by measuring the system's insulation resistance, providing early indication of ground faults before leakage current may even be present. Both AC and DC ground faults can be detected, including on systems that have high leakage capacitances.

    Designed specifically for photovoltaic arrays, the iso-PV satisfies the ground detection requirements of NEC article 690.35 for ungrounded DC solar arrays. Included are two components, the ground detector and the high voltage coupler. Both are required for operation (the voltage coupler may be installed in a separate cabinet to keep high voltage connections separate). The iso-PV features a digital display which shows the array's insulation resistance in real-time. Two SPDT contacts are available.

    The isoPV may also be used for testing array isolation prior to startup on both grounded and ungrounded arrays, per the upcoming 2014 requirements of NEC 690.5(A)(1) and NEC 690.35(C)(1).

  • Key Features: isoPV

    • Meets requirements of NEC 690.35 and CEC 64-018(1)(e) for ground fault detection on ungrounded solar arrays
    • Early indication of both AC and DC ground faults on the array side of the isolated system
    • Connects to DC arrays up to 1100 VDC
    • Designed specifically for photovoltaic systems
    • Separate voltage coupler gives the flexibility of a separate high voltage cabinet
    • Two separately adjustable insulation resistance response values, 200 Ω...100 kΩ
    • Works on systems with up to 2000 μF
    • Digital display showing readings in real-time
    • Easy-to-use, onboard menu for managing settings
    • Automatic self-test
    • Analog output
    • Built-in test and reset buttons
    • Connections for external test and reset
    • Latching or non-latching operation, selectable
    • Two SPDT contact outputs, normally energized or normally de-energized operation
    • History memory storing up to 300 events
    • Compatibility with BENDER's remote communication system
  • Applications: isoPV

    • Isolated (ungrounded) solar arrays
    • AC systems, single- and three-phase
    • Pure DC and mixed AC/DC systems
    • Systems with high leakage capacitances
    • Multiple ungrounded systems connected via tiebreaker / interlock
  • Ordering information: isoPV

    NameResponse ValueSupply VoltageOrdering Number
    isoPV-335 and AGH-PV0.2 - 100 kΩ AC 88 - 264 V (42 - 460 Hz) DC 77 - 286 V B91065133W
    isoPV-327 and AGH-PV0.2 - 100 kΩ DC 19.2 - 72 V B91065132W
  • Downloads: isoPV

    Document Name Language Date Download
    Technical Bulletin / Datasheet
    isoPV
    English 03.2015
    Download
    Installation Bulletin
    isoPV
    English 10.2012
    Download
    User Manual
    isoPV
    English 06.2012
    Download
    User Manual
    Modbus TCP Integration
    English 12.2016
    Download
    Brochure
    Ground Fault Protection in PV Systems
    English 07.2016
    Download
  • Accessories: isoPV