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Littelfuse EL3100 - Ground-Fault Indicator 600VAC

United Fuses
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Littelfuse EL3100 is a self-powered ground-fault and phase-voltage indicator engineered for three-phase ungrounded AC systems, providing essential protection by detecting ground faults and monitoring phase voltage presence. It operates across voltage ratings from 208 to 600 VAC with a solid-state relay output rated at 100 mA and 120 V AC/DC, and features a frequency response of 0 to 300 Hz. The device mounts on DIN rails or surfaces, measures 4.43 inches wide by 3.43 inches high by 2.2 inches deep, and weighs 5.19 lb. It complies with NEC Article 250.21(B) and CEC requirements, ensuring adherence to industry standards for ungrounded system safety. Typical industrial applications include use in manufacturing facilities, power distribution networks, and commercial buildings requiring reliable ground-fault indication on ungrounded AC systems.

Key Features & Specifications
  • Type: Self-Powered Ground-Fault & Phase-Voltage Indicator
  • Voltage Rating: 208/240/480/600 VAC
  • Solid-State Relay Output: 100 mA, 120 V AC/DC
  • Phase Voltage Input L: 240 VAC line-to-line max
  • Phase Voltage Input H: 600 VAC line-to-line max
  • Frequency Response: 0 to 300 Hz
  • Trip Threshold: 20 VAC (Input L), 40 VAC (Input H)
  • Internal Fuses: 500 mA, 600 VAC (not field serviceable)
  • Mounting: DIN rail or surface mount
  • Dimensions: 4.43" W x 3.43" H x 2.2" D
  • Weight: 5.19 lb
  • Certifications: NEC and CEC compliant
  • Country of Origin: Mexico