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

SE-325N

Alternate Item Number: SE-325N

UPC: 079458988246


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Overview

The Littelfuse SE-325N Neutral Grounding Resistor Monitor is a critical component for ensuring the safety and reliability of industrial electrical systems. Designed to detect ground faults in grounded neutral systems, this advanced monitor plays a vital role in preventing equipment damage, minimizing downtime, and safeguarding personnel. Its robust construction and precise monitoring capabilities make it an indispensable tool for a wide range of industrial applications where uninterrupted power and system integrity are paramount. The SE-325N operates with a standard 120 VAC supply voltage, ensuring compatibility with common industrial power infrastructure. A key feature is its configurable ground-fault trip level, which can be set anywhere between 0.5 and 4.0 Amperes. This adjustable sensitivity allows for fine-tuning the monitor to the specific requirements of different systems, from smaller, sensitive equipment to larger industrial machinery. By accurately identifying even minor ground faults, the SE-325N provides early warning, enabling proactive maintenance and preventing cascading failures that could lead to significant operational disruptions and costly repairs. This monitor is engineered for demanding industrial environments. Its reliable performance is crucial in sectors such as manufacturing, petrochemical, utilities, and data centers, where electrical faults can have severe consequences. The Littelfuse SE-325N's primary function is to continuously monitor the resistance of the neutral grounding path. If this resistance deviates beyond a pre-set threshold, indicating a potential ground fault, the monitor will initiate a trip signal. This signal can be used to de-energize the affected circuit or alert operators to the issue. Key specifications and benefits of the Littelfuse SE-325N include: * **Precise Ground Fault Detection:** Adjustable trip levels from 0.5 A to 4.0 A ensure tailored protection. * **Wide System Compatibility:** Operates with a 120 VAC supply voltage. * **Enhanced System Reliability:** Prevents equipment damage and minimizes downtime by detecting faults early. * **Personnel Safety:** Contributes to a safer working environment by reducing the risk of electrical hazards. * **Robust Industrial Design:** Built to withstand the rigors of industrial settings. * **Trusted Manufacturer:** Littelfuse is a globally recognized leader in circuit protection and power control solutions, known for quality and innovation. Proper installation and configuration of the SE-325N are essential for optimal performance. It should be integrated into the grounding system according to manufacturer guidelines and relevant electrical codes. The ability to customize the trip level is a significant advantage, allowing engineers to balance sensitivity with the need to avoid nuisance tripping due to normal system fluctuations. By investing in a high-quality neutral-grounding resistor monitor like the Littelfuse SE-325N, industrial facilities can significantly enhance their electrical system's resilience, safety, and operational efficiency. This commitment to robust protection underscores the importance of Littelfuse's role in providing essential components for critical infrastructure.
  • Littelfuse SE-325N Neutral Grounding Resistor Monitor
  • 120 VAC Supply Voltage
  • Adjustable Ground-Fault Trip Level: 0.5 A to 4.0 A
  • Reliable Ground Fault Detection for Industrial Systems
  • Enhances System Safety and Uptime

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 VAC
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.