Littelfuse EL3100-00 - Operates on AC ungrounded systems. The EL3100 is a self-powered ground-fault and phase voltage indication system for 3-phase systems. The EL3100 meets the National Electrical Code (NEC, Article 250.21(B)) and the Canadian Electrical Code (CEC) requirements for ground detectors for ungrounded alternating-current systems. Voltage connections are provided on the EL3100 for 208, 240, 480, and 600-V systems. Three green LED’s on the EL3100 indicate the presence of phase-to-ground voltage and one red LED indicates a ground fault. The EL3100 can operate stand-alone or with up to five remote LED indicators. A solid-state relay output provides indication of a ground fault. The output relay is closed when the 3-phase neutral voltage shifts as the result of ground leakage.
Littelfuse

EL3100-00

UPC: 079458825527


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Overview

The Littelfuse EL3100-00 is a self-powered ground-fault and phase-voltage indication system engineered for 3-phase ungrounded AC systems operating at 208, 240, 480, or 600V. This unit meets National Electrical Code (NEC Article 250.21(B)) and Canadian Electrical Code (CEC Part 1, Section 10-106(2)) requirements for ground detectors on ungrounded systems, ensuring compliance and operational safety. The EL3100-00 eliminates the need for external potential transformers for systems up to 600V, simplifying installation and reducing costs. Three green LEDs indicate the presence of phase-to-ground voltage, while a single red LED signals a ground fault. The system supports standalone operation or integration with up to five remote LED indicators using high-intensity 16-mm IP67 LED lamps in red or green. Remote indicators ensure system voltage is not present at the remote location, enhancing safety in distributed monitoring scenarios. A solid-state relay output provides immediate ground-fault indication by closing when 3-phase neutral voltage shifts due to ground leakage, enabling seamless integration with control systems for automated response. The EL3100-00 is CSA certified, UL Listed (E340889), and RCM approved for Australia, with a standard 5-year warranty and conformal coating for durability in harsh industrial environments. Mounting options include DIN rail and surface mounting, with dimensions of 87.0 mm (H) x 112.5 mm (W) x 56.0 mm (D). Ideal for critical applications in manufacturing plants, data centers, and facilities where maintaining ungrounded electrical system integrity is essential for continuity and safety.
  • NEC Article 250.21(B) and CEC Part 1, Section 10-106(2) compliant for ungrounded systems
  • Supports 208, 240, 480, and 600V systems without external potential transformers
  • Three green LEDs for phase-to-ground voltage indication; one red LED for ground faults
  • Supports up to five remote IP67 LED indicators (red/green, 16-mm high-intensity)
  • Solid-state relay output closes on ground leakage-induced neutral voltage shift
  • CSA certified, UL Listed (E340889), RCM approved; 5-year warranty; conformally coated
  • DIN rail and surface mounting options; dimensions: 87.0 x 112.5 x 56.0 mm

Specifications

Brand Name
Littelfuse
Connection Type
Screw Terminal / Wire Leads
Ip Rating
IP67 (remote indicators)
Material
Conformal coated (unspecified)
Mounting Type
DIN rail or surface mount
Series
EL3100
Size
87.0 mm H x 112.5 mm W x 56.0 mm D
Sub Brand
Ground-Fault and Phase-Voltage Indicator
Voltage Rating
208-600 V AC
Package Dimensions (L x W x H)
2.2 IN x 4.4 IN x 3.4 IN
Package Dimensions (L x W x H)
5.588 cm x 11.176 cm x 8.636 cm
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Frequently Asked Questions about Littelfuse

What certifications and standards do Littelfuse products comply with?

Littelfuse products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Customers can verify specific product certifications by consulting individual product datasheets on Littelfuse.com, which provide comprehensive details about standards compliance for each component.

What industries and applications are Littelfuse products used for?

Littelfuse products are critical for electrical protection and safety across multiple industrial sectors, including manufacturing, automation, power distribution, and electrical control systems. Their comprehensive product portfolio serves industries that require robust electrical protection, including motor and pump applications, solar installations, programmable logic controllers (PLCs), electrical switch panels, and critical infrastructure environments. Key product lines protect against overcurrent, voltage transients, ground faults, and temperature-related electrical risks, ensuring equipment safety and operational reliability.

What technical support does Littelfuse offer?

Littelfuse offers comprehensive technical support through multiple channels. Their Technical Hotline (800-TEC-FUSE) provides direct access to engineers who can help identify issues and recommend solutions. Additionally, Littelfuse offers extensive online Technical Resources at Littelfuse.com, including datasheets, product manuals, whitepapers, application guides, and online design tools. Their experienced product and application engineers also provide step-by-step support from design to installation.

What are the main product lines offered by Littelfuse?

Littelfuse offers comprehensive industrial protection and control product lines, including fuses, fuse holders, protection relays, temperature sensors, and electrical safety components. Their key product categories span surge protective devices, custom OEM products, electrical switch panels, medium voltage fuses, ground-fault protection relays, motor and pump protection devices, and temperature sensors. These products are designed to minimize electrical safety hazards, limit equipment damage, improve productivity, and safeguard personnel from electrical faults.

What are the key features of Littelfuse products?

Littelfuse products feature exceptional circuit protection technologies with key characteristics including UL/IEC safety standard compliance, low internal resistance, and advanced protective capabilities across multiple product lines. Their components provide critical protection for industrial systems, offering features like overcurrent protection, voltage transient suppression, and resettable protection devices with ultra-low resistance and compact designs. Key product lines include fuses, metal oxide varistors (MOVs), TVS diodes, PolySwitch devices, and specialized electronic protection components that enhance system reliability and safety.

What environmental ratings do Littelfuse products have?

Littelfuse products feature comprehensive environmental ratings, including NEMA Type 1, 2, 3, 3R, 4/4X, 12, and 13 certifications, as well as IP65 protection. These ratings ensure superior protection in diverse industrial environments, with an operating temperature range of -40°F to +131°F (-40°C to +55°C). Many products also include UV-stabilized materials and neoprene gaskets for enhanced durability in outdoor and challenging conditions.

What accessories are available for Littelfuse products?

Littelfuse offers several key accessories across their product lines, including fuse holders, voltage monitoring modules, and terminal connectors. Specific accessories include the LPSM003ZXID (indicating) and LPSM003Z (non-indicating) POWR-SAFE Dead Front fuse holders for Class CC and Midget-Style fuses, the VRM6048 voltage monitor accessory module, and female quick connect terminals (P1015 series) in various wire gauge sizes. These accessories are designed to enhance protection, monitoring, and connectivity for Littelfuse electrical components.

What is Littelfuse's warranty policy?

Littelfuse provides comprehensive warranty details on their official website at www.littelfuse.com/warranty. Customers should visit this page to review the specific warranty terms and conditions for their specific product lines. For direct warranty support or questions, customers can contact Littelfuse Technical Support at 1-800-TEC-FUSE or email [email protected].

What communication protocols do Littelfuse products support?

Littelfuse supports a comprehensive range of industrial communication protocols, including PROFIBUS, PROFINET, EtherNet/IP, DeviceNet, Modbus RTU, and CANopen. Our products provide flexible connectivity solutions across multiple industrial automation platforms, enabling seamless integration with various control systems and network architectures.

How are Littelfuse products typically installed?

Littelfuse products are typically installed using specialized mounting hardware like fuse holders, blocks, and panels designed for specific industrial applications. The POWR-SAFE Dead Front holders, for example, provide optimum protection for Class CC and Midget-Style fuses, supporting installations up to 600 VAC/DC. Installation often involves using precision terminals with strain relief, such as 0.25 in. female quick connect terminals, to ensure secure and safe electrical connections in industrial control systems.