Littelfuse SE-105L - 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-105L

Alternate Item Number: SE-105L

UPC: 079458987911


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Overview

The Littelfuse SE-105L is a critical safety component engineered for demanding industrial environments, specifically designed as a combination ground-wire monitor and ground-fault relay. This advanced device is indispensable for resistance-grounded systems, where maintaining the integrity of the ground conductor is paramount to preventing hazardous electrical conditions. Its primary function is to continuously monitor the continuity and effectiveness of the ground conductor, providing immediate detection and response to any disruptions or faults. This proactive monitoring is essential for protecting portable equipment, particularly in high-risk applications like underground mining, from dangerous voltage surges and potential electrocution hazards that can arise from ground faults. The SE-105L is expertly suited for applications involving trailing cables rated at 5 kV and under. Its robust design and reliable performance make it an excellent choice for the harsh and dynamic conditions typically encountered in underground mining operations. By ensuring the ground path remains intact, the SE-105L significantly enhances operational safety and minimizes the risk of equipment damage and costly downtime. This device is a testament to Littelfuse's commitment to providing high-quality, reliable protection solutions for critical electrical infrastructure. Key features and benefits of the Littelfuse SE-105L include: * **Continuous Ground-Wire Monitoring:** Actively checks the ground conductor's integrity, offering real-time protection. * **Ground-Fault Relay Functionality:** Detects and responds to ground faults, interrupting power to prevent hazards. * **Designed for Resistance-Grounded Systems:** Optimized for the specific requirements of these electrical configurations. * **5 kV Voltage Rating:** Suitable for a wide range of portable equipment and trailing cable applications. * **Ideal for Underground Mining:** Engineered to withstand the challenging conditions of this industry. When selecting a ground-wire monitor and ground-fault relay, professionals prioritize devices that offer unwavering reliability and precise fault detection. The Littelfuse SE-105L, with its specialized design for resistance-grounded systems and its proven track record in critical applications, stands out as a superior choice. Its ability to safeguard personnel and equipment from the severe consequences of ground faults underscores its value in any operation where electrical safety is a top priority. 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. Trust Littelfuse for robust electrical protection solutions that ensure operational continuity and safety.
  • Continuously monitors ground conductor integrity for enhanced safety.
  • Functions as a ground-fault relay to detect and respond to faults.
  • Specifically designed for resistance-grounded electrical systems.
  • Rated for 5 kV, suitable for demanding industrial applications.
  • Optimized for underground mining trailing cable protection.

Specifications

Application
Mining
Brand Name
Littelfuse
Series
SE-105/SE-107
Special Features
For trailing cables 5 kV
Standard
CSA UL
Sub Brand
SE 105 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
Package Weight (Imperial)
1.980 L
Package Weight (Metric)
0.900 kg
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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.