Littelfuse SE-135-03 - The SE-134C/SE-135 is a microprocessor-based, combination ground-wire monitor and ground-fault relay for resistance grounded or solidly grounded systems. It continuously monitors the integrity of the ground conductor to protect portable equipment from hazardous voltages caused by ground faults. The SE-134C/SE-135 is field proven in monitoring trailing cables on large mobile equipment such as drag-lines, mining shovels, shore-to-ship power cables, dock-side cranes, stacker-reclaimers, submersible pumps, and portable conveyors.
Littelfuse

SE-135-03

Alternate Item Number: SE-135-03

UPC: 079458988031


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Overview

The Littelfuse SE-135-03, SKU SE-135-03, stands as a critical component for ensuring the safety and operational integrity of portable and mobile industrial equipment. This advanced, microprocessor-based unit functions as both a combination ground-wire monitor and a ground-fault relay, specifically engineered for systems that are either resistance grounded or solidly grounded. Its primary role is the continuous and vigilant monitoring of the ground conductor's integrity. This proactive approach is essential for preventing hazardous voltage buildup that can occur due to ground faults, thereby safeguarding personnel and sensitive machinery. The SE-135-03 has a proven track record in demanding industrial environments. Its robust design and reliable performance make it an ideal choice for a wide array of applications where the reliability of ground connections is paramount. These include, but are not limited to: * **Mining Operations:** Monitoring trailing cables on large mobile equipment such as drag-lines and mining shovels, where harsh conditions and high power demands are common. * **Maritime and Port Infrastructure:** Protecting shore-to-ship power cables and dock-side cranes, ensuring safe and uninterrupted power delivery in challenging coastal environments. * **Bulk Material Handling:** Safeguarding stacker-reclaimers and portable conveyors, critical for efficient operation in ports, mines, and processing plants. * **Submersible Equipment:** Providing essential ground fault protection for submersible pumps, often operating in wet and potentially hazardous conditions. By continuously assessing the continuity and resistance of the ground path, the SE-135-03 can rapidly detect deviations that indicate a potential fault. Upon detection, it initiates a protective action, typically by de-energizing the circuit, thereby mitigating the risk of electric shock and equipment damage. The microprocessor-based architecture allows for precise control and sophisticated fault detection algorithms, offering a higher level of protection compared to simpler electromechanical relays. Littelfuse, a globally recognized leader in circuit protection, brings its extensive expertise to the SE-135-03, ensuring that users benefit from a product built with quality, reliability, and safety as top priorities. Its field-proven success across diverse and critical applications underscores its value as a dependable solution for ground-fault protection in any industrial setting requiring robust ground integrity.
  • Microprocessor-based for advanced ground-fault detection.
  • Continuously monitors ground conductor integrity.
  • Protects portable equipment from hazardous ground fault voltages.
  • Suitable for resistance grounded or solidly grounded systems.
  • Field-proven in demanding industrial applications like mining and maritime.

Specifications

Application
Industrial
Brand Name
Littelfuse
Special Features
High Quality
Sub Brand
Relay Series
Type
Protection Relays and Controls
Package Dimensions (L x W x H)
6.3 IN x 3.9 IN x 8.4 IN
Package Dimensions (L x W x H)
16.002 cm x 9.906 cm x 21.336 cm
Package Weight (Imperial)
5.280 L
Package Weight (Metric)
2.400 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.