Online Tools

Use these related online tools to help you select the right product.

Product Search

  • Description
  • Features
  • Applications
  • Ordering Info
  • Downloads
  • Accessories
  • iso1685P

    Ground fault detector for large scale isolated (ungrounded) systems and solar arrays

    This device meets or exceeds the following code requirements:

    • NEC 690.35 and CEC 64-018(1)(e) for ground fault detection on ungrounded solar arrays
    • NEC 250.21(B) and CEC 10-106(2) for ground fault detection on ungrounded AC systems
    • NEC 250.167(A) for ground fault detection on ungrounded DC systems

    Designed specifically for large scale ungrounded systems and photovoltaic systems, the iso1685P 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 iso1685 can connect to systems up to 1000 VAC / 1500 VDC. Two separately adjustable response values are available. Two SPDT contacts are available to trip on an active alarm, as well as a third SPDT contact for system and device errors. RS-485 communication is integrated for connection to BENDER's remote communication system. The iso1685 also supports connecting to Bender's ground fault location system for ungrounded systems.

    The iso1685P can be combined with other equipment to create a ground fault location system. Faults can be located down to the faulty string with both portable and fixed installed equipment.

    The iso1685P may also be used for determining PV system isolation prior to startup on both grounded and ungrounded solar arrays.

  • Key Features: iso1685P

    • Fufills various code requirements for ground fault detection on ungrounded systems and solar arrays
    • Designed specifically for ground fault detection on large-scale ungrounded systems and solar arrays
    • Works on systems up to 1000 VAC / 1500 VDC
    • Detect single, multiple, and symmetrical ground faults
    • Two separately adjustable alarm values over a wide range (200 Ω - 1 MΩ)
    • Automatic adaptation to system leakage capacitance up to 2000 μF
    • Self monitoring, connection monitoring, and automatic self-test
    • RS-485 interface for connecting to Bender remote communication system
    • Automatic data logging of system status, stored on microSD card
    • Built-in and external test and reset
    • Separate SPDT contact outputs for alarms and device errors
    • Normally energized or de-energized operation for contacts
    • Easy-to-use plug-in connectors
    • Suppots connecting to Bender's ground fault location system
  • Applications: iso1685P

    • Isolated (ungrounded), large-scale systems and 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: iso1685P

    NameResponse ValueSupply VoltageOrdering Number
    iso1685P-4250.2 - 1000 kΩ DC 18 - 30 V B91065801
  • Downloads: iso1685P

    Document Name Language Date Download
    Technical Bulletin / Datasheet
    English 02.2015
    User Manual
    Modbus TCP Integration
    English 12.2016
    Ground Fault Protection in PV Systems
    English 07.2016
  • Accessories: iso1685P