Littelfuse SE-325DSN - SE-325DSN 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-325DSN

Alternate Item Number: SE-325DSN

UPC: 079458988123

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Overview

The Littelfuse SE-325DSN stands as a critical component for maintaining the integrity and safety of industrial electrical systems. As a sophisticated neutral-grounding resistor monitor, its primary function is to detect and alert operators to ground faults, a common yet potentially damaging electrical anomaly. This device is engineered by Littelfuse, a globally recognized leader in circuit protection, ensuring a high standard of quality and reliability for demanding industrial environments. The SE-325DSN is designed with versatility in mind, featuring a broad supply voltage range of 120 AC/DC. This adaptability allows for seamless integration into a wide array of existing power distribution systems, from manufacturing plants and processing facilities to utility substations and critical infrastructure. Its robust construction is built to withstand the rigors of industrial settings, providing consistent performance even under challenging operational conditions. A key feature of the SE-325DSN is its adjustable ground-fault trip level, which can be precisely set anywhere between 0.5 and 4.0 Amperes. This granular control is essential for tailoring the monitor's sensitivity to the specific requirements of different electrical systems, preventing nuisance tripping while ensuring prompt detection of potentially hazardous ground faults. Such precise monitoring is paramount for safeguarding sensitive equipment, preventing costly downtime, and most importantly, ensuring the safety of personnel. Key specifications and benefits of the Littelfuse SE-325DSN include: * **Advanced Ground-Fault Detection:** Proactively identifies ground faults to prevent equipment damage and electrical hazards. * **Wide Supply Voltage Compatibility:** Operates reliably with 120 AC/DC power sources, offering broad application flexibility. * **Adjustable Trip Sensitivity:** User-configurable trip levels from 0.5A to 4.0A allow for optimized system protection. * **Enhanced System Uptime:** Minimizes unplanned shutdowns by providing early warning of ground faults. * **Improved Safety:** Contributes to a safer working environment by mitigating electrical risks. * **Littelfuse Quality:** Backed by the reputation of a trusted manufacturer known for durable and effective circuit protection solutions. In industrial power systems, maintaining a stable neutral ground is crucial for system stability and fault isolation. The SE-325DSN plays a vital role in this by continuously monitoring the integrity of the grounding path. When a ground fault occurs, it deviates the current flow, which the SE-325DSN is designed to detect. Upon exceeding the set trip level, the monitor initiates an alarm or trip sequence, allowing for immediate corrective action. This proactive approach is far more effective than reactive measures taken after significant damage has occurred. Applications for the Littelfuse SE-325DSN are extensive and include motor control centers, generator protection, transformer monitoring, and general power distribution panels in sectors such as petrochemical, mining, water treatment, and heavy manufacturing. Its ability to integrate with SCADA systems or local alarm panels further enhances its utility in modern industrial automation and monitoring strategies. Choosing the SE-325DSN means investing in a reliable, precise, and safety-conscious solution for your critical electrical infrastructure.
  • Littelfuse SE-325DSN Neutral-Grounding Resistor Monitor
  • 120V AC/DC Supply Voltage for versatile integration
  • Adjustable Ground-Fault Trip Level: 0.5A to 4.0A
  • Reliable detection of ground faults in industrial systems
  • Enhances electrical safety and system integrity

Specifications

Application
Mining
Brand Name
Littelfuse
Current Rating
0.5–4.0 A
Special Features
Continuous NGR monitoring
Sub Brand
SE 325 Series
Type
Trailing Cable Protection
Voltage Rating
120 V AC/DC
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.