Littelfuse SE-325DS - SE-325DS 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-325DS

Alternate Item Number: SE-325DS

UPC: 079458988116


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Overview

The Littelfuse SE-325DS Neutral Grounding Resistor Monitor is a critical component for ensuring the safety and reliability of industrial electrical systems. Designed to detect ground faults within a neutral grounding resistor circuit, this device provides essential protection against equipment damage and personnel hazards. Its robust construction and precise calibration make it an ideal choice for demanding industrial environments where uninterrupted operation and safety are paramount. With a versatile supply voltage of 120 VAC-DC, the SE-325DS seamlessly integrates into a wide range of existing electrical infrastructures. The adjustable ground-fault trip level, ranging from 0.5 to 4.0 Amperes, allows for fine-tuning the sensitivity to suit specific application requirements. This flexibility ensures that the monitor can effectively identify even minor ground faults, preventing them from escalating into more serious issues. Early detection is key to minimizing downtime and costly repairs. The primary function of the SE-325DS is to monitor the integrity of the neutral grounding resistor. In grounded systems, this resistor limits the magnitude of fault current during a ground fault, preventing excessive overvoltages and damage to sensitive equipment. The SE-325DS continuously assesses the resistance and current flow, triggering an alarm or shutdown sequence if the parameters fall outside acceptable limits. This proactive approach to fault management is indispensable for maintaining system stability and operational continuity. Key features and benefits of the Littelfuse SE-325DS include: * **Precise Ground-Fault Detection:** Adjustable trip levels (0.5–4.0 A) offer tailored protection. * **Wide Supply Voltage Compatibility:** Operates with 120 VAC-DC, simplifying installation. * **Enhanced System Safety:** Protects personnel and sensitive equipment from ground fault hazards. * **Reliable Operation:** Built to withstand harsh industrial conditions. * **Downtime Reduction:** Facilitates early detection and mitigation of faults. Typical applications for the SE-325DS are found across various industrial sectors, including manufacturing plants, data centers, utility substations, and process control facilities. Any application utilizing a grounded neutral system where ground-fault protection is a requirement will benefit from the SE-325DS. Its ability to provide continuous monitoring and rapid response makes it an indispensable tool for maintaining power quality and operational integrity. Littelfuse is a globally recognized leader in circuit protection, and the SE-325DS exemplifies their commitment to delivering high-quality, reliable solutions. Professionals select Littelfuse products for their proven performance, durability, and adherence to stringent industry standards. The SE-325DS is engineered for straightforward installation and integration, ensuring that electrical engineers and maintenance personnel can deploy it efficiently. By investing in the Littelfuse SE-325DS, industrial facilities can significantly enhance their safety protocols and ensure the long-term health of their electrical systems.
  • Littelfuse SE-325DS Neutral Grounding Resistor Monitor
  • Supply Voltage: 120 VAC-DC
  • Ground-Fault Trip Level: Adjustable 0.5–4.0 A
  • Designed for industrial electrical system safety and reliability
  • Provides critical ground-fault detection and protection

Specifications

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