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Littelfuse SE-330AU-20-00 - SE-330AU-20-00 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-20-00

Alternate Item Number: SE-330AU-20-00

UPC: 079458988697


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Overview

The **Littelfuse SE-330AU-20-00** is a high-performance neutral-earthing resistor monitor engineered for critical industrial power distribution systems. Designed to ensure the integrity and safety of neutral grounding networks, this advanced monitor provides precise real-time monitoring of neutral-earthing resistors, preventing potential faults and enhancing system reliability. With a versatile voltage rating of **28–52 V AC** and **36–72 V DC**, the SE-330AU-20-00 delivers consistent performance across a wide range of industrial applications, from renewable energy installations to heavy manufacturing and utility substations. **Key Features and Benefits:** - **Wide Voltage Compatibility:** The SE-330AU-20-00 supports a broad input voltage range, making it ideal for diverse industrial environments where power fluctuations are common. Its **28–52 V AC / 36–72 V DC** rating ensures seamless integration with existing power systems without requiring additional voltage conversion equipment. - **USB Connectivity for Data Integration:** Featuring USB communication, this monitor simplifies data logging, remote monitoring, and system integration. Professionals can easily export performance data for analysis, troubleshooting, or compliance reporting, reducing downtime and improving maintenance efficiency. - **Enhanced System Safety and Stability:** By continuously monitoring neutral-earthing resistors, the SE-330AU-20-00 detects potential issues such as insulation degradation or ground faults before they escalate into costly failures. This proactive approach minimizes unplanned outages and protects sensitive equipment from damage. - **Robust Design for Harsh Environments:** Built to withstand industrial conditions, the SE-330AU-20-00 features a durable construction that resists vibration, temperature extremes, and electromagnetic interference. Its compact form factor allows for easy installation in control panels, switchgear, or remote monitoring stations. - **Compliance and Reliability:** Littelfuse is a globally trusted manufacturer of power protection and monitoring solutions, known for its commitment to quality and innovation. The SE-330AU-20-00 adheres to industry standards, providing peace of mind for engineers and facility managers seeking dependable performance. **Typical Applications:** The SE-330AU-20-00 is widely used in industries where neutral grounding plays a critical role in system safety and stability. Common applications include: - **Power Generation Facilities:** Monitoring neutral-earthing resistors in generators, transformers, and switchgear to prevent ground faults and ensure grid stability. - **Renewable Energy Systems:** Safeguarding solar and wind power installations by detecting insulation issues in neutral grounding networks. - **Manufacturing Plants:** Protecting sensitive industrial equipment from ground faults in high-power distribution systems. - **Commercial Buildings:** Enhancing electrical safety in large facilities such as hospitals, data centers, and airports. - **Utility Substations:** Ensuring reliable operation of critical infrastructure by monitoring neutral grounding performance. **Why Choose Littelfuse?** Littelfuse is a leader in electrical protection, with decades of experience in developing solutions for power distribution, industrial automation, and renewable energy. The SE-330AU-20-00 reflects the company’s dedication to innovation, reliability, and customer support. Whether you’re upgrading an existing system or designing a new installation, the SE-330AU-20-00 provides the precision, durability, and connectivity needed to maintain optimal performance in even the most demanding environments. For engineers, electricians, and facility managers seeking a dependable neutral-earthing resistor monitor, the **Littelfuse SE-330AU-20-00** is the smart choice for safeguarding your power systems and ensuring long-term operational efficiency.
  • Wide voltage compatibility: 28–52 V AC / 36–72 V DC
  • USB connectivity for data logging and remote monitoring
  • Continuous monitoring of neutral-earthing resistors for fault detection
  • Robust design for harsh industrial environments
  • Seamless integration with existing power distribution systems

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
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.