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  • Products
    • Ground Fault Products

      For Grounded and High-Resistance Grounded Systems
      Monitor, detect and interrupt both AC and DC ground faults with BENDER's UL listed line of ground fault relays and ground fault circuit interrupters (GFCI), including multi-branch monitoring capabilities from a single unit.
        • See our products
      • Ground Fault Relays

        • AC Only Systems
        • AC/DC Systems
        • AC/DC Multi-Channel Relays
      • GFCIs and Panels

        • Ground Fault Circuit Interrupters (GFCIs)
        • Monitoring / Protection Panels

        Accessories

        • Current Transformers
        • Remote Indicators
        • Communication Solutions
      • Tools and Resources

        • Ground Fault Relay Selector
        • Ground Fault Location System Builder
        • GFCI Part Number Builder
        • Current Transformer Sizer
        • Product Overview Catalog
        • Technical Documentation
    • Ground Fault Products

      For Ungrounded (Floating) Systems
      BENDER's advanced ground fault equipment for ungrounded systems detects and locates both AC and DC faults, and complies with code requirements such as NEC 250.21(B) and CEC 10-106(2).
        • See our products
      • Ground Fault Detectors

        • Low Voltage AC/DC Systems
        • Main AC/DC Systems

        Ground Fault Location

        • Automated, Installed Equipment
        • Portable Equipment

        Accessories

        • Voltage Couplers
        • Remote Indicators
        • Communication Solutions
      • Tools and Resources

        • Ground Fault Relay Selector
        • Technical Documentation

        Expert Answers

        • How do ground faults on ungrounded systems occur?
        • How do BENDER relays detect ground faults on ungrounded systems?
        • How can I locate ground faults on ungrounded systems?
      • Learn about BENDER's complete line of ground fault products in our overview brochure.

    • Ground Fault Products

      For Renewable Industries (including solar and EV)
      BENDER's years of experience in the solar industry have produced advanced ground fault protection equipment for both grounded and ungrounded arrays, complying with requirements such as NEC 690.35, 690.5, and CEC 64-108.
        • Learn more
      • Ungrounded Solar Arrays

        • Arrays Less Than 100 kW
        • Arrays 100 kW Or Greater

        Grounded Solar Arrays

        • Inverter Monitoring
        • Combiner Box Monitoring
      • EV and EVSE

        • Electric vehicles
        • Electric vehicle chargers

        Tools and Resources

        • Technical Documentation
        • Solar Solutions Overview
      • Learn more about BENDER's complete line of protection products for solar applications.

    • Isolated Power Systems

      For Healthcare Facilities and Critical Care Areas
      BENDER's complete isolated power solutions for heathcare facilities ensure hospital electrical systems run at peak condition, and comply with the wet location requirements of the NEC, NFPA 99, and CSA Z32.
        • Learn more
      • Panels and Modules

        • Isolated Power Panels
        • Ground / Power Modules
        • Digital Clocks and Timers

        Components and Accessories

        • Isolation Transformers
        • Line Isolation Monitors
        • Remote Indicators
        • Load Monitoring CTs
        • Communication Solutions
        • Testing Equipment
        • Grounding Accessories
      • Testing and Support Services

        • Checkout Services
        • Consulting Services
        • Periodic Testing and Certification
        • Retrofitting and Upgrading Services

        Tools and Resources

        • Isolated Power Solution Builder
        • Healthcare Solutions Overview
      • Learn how BENDER provides complete isolated power solutions in our overview brochure.

    • Protective Relays

      Voltage, Current, and Continuity monitoring
      BENDER's complete line of general purpose protective relays ensure your system runs at peak condition, monitoring for alarms including voltage, frequency, current, ground continuity, and more.
        • See our products
      • Products

        • Voltage and Frequency Relays
        • Current Relays
        • Continuity Relays
        • Offline Ground Fault Monitors
      • Resources

        • Product Overview Catalog
        • Technical Documentation
  • Solutions

    Solutions for all types of applications.

    • Solar

      The latest solutions for isolated and non-isolated PV arrays and inverters

      More Info
    • Healthcare

      Isolated power solutions in compliance with new NFPA 99 wet location requirements

      More Info
    • Offshore

      Ground fault detection and location solutions for systems on offshore platforms

      More Info
    • Solutions

      • Industrial Facilities
      • Ships and Marinas
      • Railway and Transit
      • Mining
  • Knowledgebase

    Learn from the experts.

    • How It Works

      Learn the principles behind the BENDER's advanced technology.

      View All
    • Featured Articles

      • Ground fault monitoring on grounded AC systems
      • Ground fault detection on ungrounded AC/DC systems
      • Ground fault location in ungrounded systems
      • Ground fault protection in PV systems
      • Ground fault protection in marinas and shore power
      • View all
  • Tech Resources
    • Resource Library

      Complete list of downloadable resources, including datasheets, manuals, drawings, and more.

      • Visit Technical Library
      • Tools

        • Ground Fault Relay Selector
        • Current Transformer Sizer
        • GFCI Part Number Builder
        • Isolated Power Solution Builder
        • Ground Fault Location System Builder for Grounded Systems
      • bender.org/mobile

        Need product information on the go? Access BENDER on your smartphone to get product information, documentation, and more.

  • About Us
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      • Questions?

        Find contact information or use our feedback form.

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      • Call The Experts

        USA: 800-356-4266

        Canada: 800-243-2438

        Worldwide: click here

    • Regional Locations

      Find and contact a local BENDER office or representative near you.

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      • Worldwide

        BENDER operates in over 60 countries worldwide. Click here to find an office or local representative near you.

  • Local Reps

Featured Articles

  • Detecting ground faults in ungrounded systems
  • Locating ground faults in ungrounded systems
  • Monitoring systems with variable frequency drives
  • Ground fault protection for solar arrays and inverters

Knowledgebase - How It Works

With decades of experience, BENDER has your electrical safety questions answered. Find answers to questions regarding the principles behind ground fault protection, and how BENDER devices ensure that your system remains protected in virtually all applications.

Ungrounded Systems

How do I locate ground faults in ungrounded systems?

How do BENDER ground fault detectors for ungrounded systems operate?

How do ground faults on ungrounded systems occur?

Grounded Systems

How do BENDER's ground fault relays for grounded systems operate?

Why do typical ground fault relays operate improperly with variable frequency drives (VFDs)?

Isolated Power for Medical Facilities

How does a line isolation monitor (LIM) detect ground faults?

Application Specific

How do I detect faults in an ungrounded DC solar array?

How can I detect ground faults on shore power?

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  • Bender Inc.
    700 Fox Chase
    Coatesville PA 19320

    Toll-Free: 800-356-4266
    Main: 610-383-9200
    Fax: 610-383-7100

    E-mail: info@bender.org

  • Products

    • Ground Fault Products for Grounded Systems
    • Ground Fault Products for Ungrounded Systems
    • Ground Fault Circuit Interrupters (GFCIs)
    • Isolated Power Systems
    • Protective Relays
  • Solutions

    • Solar
    • Healthcare
    • Offshore
    • Industrial Facilities
    • Ships and Marinas
    • Rail and Transit
    • Mining
  • Knowledgebase

    • How It Works
    • Solutions
    • View All Articles
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