Littelfuse SE-325DST - SE-325DST is a neutral-grounding resistor monitor with a supply voltage of 120 ac-dc and a ground-fault trip level of 0.5–4.0 A.
Littelfuse

SE-325DST

Alternate Item Number: SE-325DST

UPC: 079458988147


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Overview

The Littelfuse SE-325DST Neutral-Grounding Resistor Monitor is a critical component for ensuring the safety and reliability of industrial electrical systems. Designed by Littelfuse, a recognized leader in circuit protection and power control, this monitor specifically addresses the need for robust ground-fault detection in systems utilizing neutral-grounding resistors. Its primary function is to continuously monitor the integrity of the neutral-grounding resistor, providing an essential layer of protection against potential ground faults that could lead to equipment damage, operational downtime, and safety hazards. With a versatile supply voltage rating of 120V AC/DC, the SE-325DST is adaptable to a wide range of industrial power configurations. This flexibility simplifies integration into existing infrastructure and new installations alike. The adjustable ground-fault trip level, a key feature of this unit, allows for precise calibration to suit the specific requirements of different electrical systems. Users can set the trip threshold anywhere between 0.5 Amperes and 4.0 Amperes, enabling fine-tuned sensitivity to detect even minor ground faults early, thereby preventing escalation. Key benefits of deploying the Littelfuse SE-325DST include: * **Enhanced System Safety:** Early detection of ground faults significantly reduces the risk of electrical fires, equipment damage, and personnel injury. * **Minimized Downtime:** Proactive fault identification allows for scheduled maintenance rather than costly emergency repairs, keeping operations running smoothly. * **Customizable Protection:** The adjustable trip level ensures optimal performance for diverse system loads and sensitivities. * **Broad Application Compatibility:** Suitable for a multitude of industrial environments, including manufacturing plants, power generation facilities, data centers, and commercial buildings. The SE-325DST is an indispensable tool for maintaining the stability and integrity of power distribution networks. Its robust construction and reliable performance are hallmarks of Littelfuse products, assuring users of dependable operation in demanding industrial settings. By monitoring the neutral-grounding resistor, this device plays a vital role in preventing transient overvoltages and ensuring that fault currents are managed effectively, protecting sensitive equipment and personnel. Professionals in electrical engineering and maintenance will find the SE-325DST to be a valuable addition to their safety and monitoring toolkit, contributing to overall operational excellence and compliance with industry standards. The SKU for this essential monitoring device is SE-325DST.
  • Littelfuse SE-325DST Neutral-Grounding Resistor Monitor
  • 120V AC/DC Supply Voltage for versatile integration
  • Adjustable Ground-Fault Trip Level: 0.5–4.0 A for precise sensitivity
  • Enhances electrical system safety and operational reliability
  • Ideal for industrial power distribution and machinery monitoring

Specifications

Application
Mining
Brand Name
Littelfuse
Special Features
Continuous NGR monitoring
Sub Brand
SE 325 Series
Type
Trailing Cable Protection
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.