Littelfuse SE-107L - The SE-105/SE-107 is a combination ground-wire monitor and ground-fault relay for resistance-grounded systems. It continuously monitors the integrity of the ground conductor to protect portable equipment from hazardous voltages caused by ground faults. The SE-105/SE-107 is an excellent choice for trailing cables 5 kV and under in underground mining applications. For higher voltages or long-cable applications, see the SE-134C/SE-135.
Littelfuse

SE-107L

Alternate Item Number: SE-107L

UPC: 079458987980


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Overview

The Littelfuse SE-107L is a critical safety component for resistance-grounded electrical systems, specifically designed for demanding industrial environments. As a combination ground-wire monitor and ground-fault relay, its primary function is to continuously verify the integrity of the ground conductor. This proactive monitoring is essential for preventing hazardous voltage buildup on portable equipment, a common risk in applications where ground faults can occur. The SE-107L is engineered to provide robust protection, ensuring operational continuity and personnel safety. This relay is an exemplary choice for underground mining operations utilizing trailing cables rated at 5 kV and below. In these high-risk environments, the reliability of grounding is paramount. The SE-107L's ability to detect even subtle degradation in the ground path allows for timely intervention, averting potential equipment damage and costly downtime. Its application in mining underscores its durability and effectiveness in harsh conditions, where dust, moisture, and mechanical stress are prevalent. Key features and benefits of the Littelfuse SE-107L include: * **Continuous Ground Conductor Monitoring:** Ensures the ground path remains intact at all times. * **Ground-Fault Protection:** Detects and responds to ground faults, preventing hazardous voltage levels. * **Designed for Resistance-Grounded Systems:** Optimized for the specific characteristics of these electrical configurations. * **Ideal for 5 kV Trailing Cables:** Specifically suited for common mining cable voltage ratings. * **Enhanced Equipment Safety:** Protects valuable portable machinery from electrical damage. * **Improved Personnel Safety:** Mitigates the risk of electric shock. Littelfuse is a globally recognized leader in circuit protection, and the SE-107L exemplifies their commitment to delivering high-quality, reliable solutions. For applications requiring higher voltage ratings or extended cable lengths, Littelfuse offers the SE-134C/SE-135 series, demonstrating a comprehensive product portfolio to meet diverse industrial needs. Implementing the SE-107L is a proactive step towards maintaining a safe and efficient operational environment, safeguarding both personnel and critical assets in challenging industrial settings.
  • Continuously monitors ground conductor integrity for enhanced safety.
  • Provides ground-fault relay protection for resistance-grounded systems.
  • Ideal for portable equipment and trailing cables up to 5 kV.
  • Designed for demanding underground mining applications.
  • Ensures personnel safety and protects equipment from hazardous voltages.

Specifications

Application
Mining
Brand Name
Littelfuse
Special Features
For trailing cables 5 kV
Standard
CSA UL
Sub Brand
SE 107 Series
Type
Trailing Cable Protection
Voltage Rating
5 kV
Package Dimensions (L x W x H)
3.9 IN x 4.3 IN x 5.9 IN
Package Dimensions (L x W x H)
9.906 cm x 10.922 cm x 14.986 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.