Schneider Electric USA Website

Welcome to our website.

To view product availability in a specific country, select from the country list below. For Investor Relations, please visit our global site.

Choose another country or region


    Micrologic Add-on Ground-fault Modules

    For PowerPact H- and J-Frame circuit breakers

    For PowerPact H- and J-Frame circuit breakers to provide equipment ground fault protection from 20A to 200A with adjustable time delays for flexibility

    Schneider Eletric Square D Picture
    Micrologic Add-on Ground-fault Modules
    • Features


      The Micrologic® Ground Fault Module (GFM) is a UL Listed circuit breaker accessory designed for PowerPact® H-Frame and PowerPact J-Frame circuit breakers. The add-on module is easily field installable for convenience. It provides ground fault sensing and relaying functions to help protect equipment, reducing downtime from damage due to ground faults. The GFM provides protection with sensitivity ranges between 20A and 200A. For ground fault sensitivity levels from 30mA to 3A, see our Earth Leakage Modules.

      Add-on Ground Fault Module (GFM) Features
      • UL 1053 - Ground-fault Sensing and Relaying Equipment
      • Adjustable ground-fault pickup levels from 20A to 100A with H-Frame companion breaker and 40A to 200A with J-Frame companion breaker
      • Adjustable ground-fault delays from 0.2 sec to 0.6 sec
      • Integral ground fault push-to-test feature meets NEC 230-95(c)
      • Ground fault trip indicator includes pop-up button for local status
      • All GFMs are supplied with required hardware for I-Line® or unit-mount applications
      • A 12 Vdc shunt trip is required in the circuit breaker; it may be field-installed (Cat. No. S29382) or factory-installed (suffix -SN) in the UL 489 Listed PowerPact H- and J-Frame circuit breakers
      • Optional Neutral current transformer for 3-phase 4-wire applications
      • 120 Vac control power is required for integral test feature
      • Zone-selective interlocking capability with upstream Micrologic trip system circuit breakers is standard
      Product Details:
      GFM150HD - for up to 150A H-Frame breaker
      GFM250JD - for up to 250A J-Frame breaker
      GFM25CT - optional neutral current transformer for 4-wire loads



      Healthcare Facilities
      Semiconductor Machines
      Industrial Markets