Littelfuse SE-330AU-20-01 - SE-330AU-20-01 is an advanced neutral-earthing resistor monitor with a supply voltage ac of 28–52 and a supply voltage dc of 36–72. Network communications is offered via USB.
Littelfuse

SE-330AU-20-01

Alternate Item Number: SE-330AU-20-01

UPC: 079458988703

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Overview

The Littelfuse SE-330AU-20-01 stands as a sophisticated and essential component for maintaining the integrity and safety of industrial electrical power systems. As an advanced neutral-earthing resistor monitor, its primary function is to provide continuous, real-time surveillance of the neutral grounding resistor's performance. This proactive monitoring is critical for preventing system damage, ensuring personnel safety, and minimizing costly downtime in a wide array of industrial settings. Designed with versatility in mind, the SE-330AU-20-01 accommodates a broad supply voltage range, operating reliably with either 28–52V AC or 36–72V DC. This flexibility allows for seamless integration into diverse power infrastructures, from smaller auxiliary systems to larger industrial grids. The device's robust construction and adherence to high manufacturing standards, characteristic of Littelfuse products, ensure dependable operation even in demanding environments. A key feature that enhances its utility in modern industrial control architectures is its network communication capability via USB. This interface facilitates straightforward data acquisition, configuration, and diagnostic reporting. Professionals can easily connect the SE-330AU-20-01 to supervisory control and data acquisition (SCADA) systems, programmable logic controllers (PLCs), or other monitoring platforms, enabling centralized oversight and rapid response to any anomalies. The importance of a properly functioning neutral-earthing resistor cannot be overstated. It plays a crucial role in limiting fault currents, thereby protecting sensitive equipment from surge damage and reducing the risk of arc flashes. The Littelfuse SE-330AU-20-01 actively monitors the resistance value, detecting deviations that could indicate a developing fault or degradation of the resistor itself. Early detection allows for scheduled maintenance rather than emergency repairs, significantly improving operational efficiency and cost-effectiveness. Key benefits and applications of the Littelfuse SE-330AU-20-01 include: * **Enhanced System Protection:** Continuously monitors neutral earthing resistor integrity to prevent equipment damage from fault currents. * **Improved Safety:** Reduces the risk of arc flashes and electrical hazards by ensuring proper grounding. * **Increased Uptime:** Proactive fault detection enables scheduled maintenance, minimizing unexpected outages. * **Versatile Power Compatibility:** Operates with a wide AC and DC supply voltage range (28–52V AC / 36–72V DC). * **Seamless Integration:** USB communication port for easy connection to SCADA, PLC, and other monitoring systems. * **Reliable Performance:** Built with Littelfuse's commitment to quality and durability for industrial environments. This monitor is an indispensable tool for utilities, power generation facilities, petrochemical plants, manufacturing operations, and any industry where reliable and safe power distribution is paramount. By providing critical insights into the health of the neutral grounding system, the SE-330AU-20-01 empowers engineers and technicians to maintain optimal system performance and safeguard valuable assets. Trust Littelfuse for advanced solutions that drive efficiency and safety in critical infrastructure.
  • Advanced neutral-earthing resistor monitoring for industrial power systems
  • Wide supply voltage range: 28–52V AC and 36–72V DC
  • USB network communication for seamless data integration and diagnostics
  • Enhances system safety and protects against fault currents
  • Reliable performance from manufacturer Littelfuse

Specifications

Application
Low- and medium-voltage transformers and generators
Brand Name
Littelfuse
Special Features
Continuous NGR monitoring
Sub Brand
SE 330 Series
Type
Neutral-grounding resistor monitor
Voltage Rating
28–52 VAC / 36–72 VDC
Package Dimensions (L x W x H)
5.8 IN x 3.9 IN x 8.4 IN
Package Dimensions (L x W x H)
14.732 cm x 9.906 cm x 21.336 cm
Package Weight (Imperial)
4.400 L
Package Weight (Metric)
2.000 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.