Littelfuse SE-330-21-00 - SE-330-21-00 is an advanced ground-fault and neutral-grounding resistor monitor with a supply voltage ac of 28–52 and a supply voltage dc of 36–72. Network communications is offered via USB; DeviceNet.
Littelfuse

SE-330-21-00

Alternate Item Number: SE-330-21-00

UPC: 079458988499


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Overview

The Littelfuse SE-330-21-00 represents a significant advancement in industrial power system monitoring, specifically designed to detect and manage ground-fault conditions and monitor the integrity of neutral-grounding resistors. This sophisticated device is engineered for critical applications where electrical safety, system reliability, and operational continuity are paramount. Its robust design and advanced capabilities make it an indispensable component for maintaining stable and secure power distribution networks across various industrial sectors. Engineered with a versatile supply voltage range, the SE-330-21-00 operates reliably with AC supply voltages from 28 to 52 volts and DC supply voltages from 36 to 72 volts. This broad operational window ensures compatibility with a wide array of industrial power configurations, from smaller auxiliary systems to larger primary distribution networks. The ability to function across these varied voltage levels underscores its adaptability and suitability for diverse industrial environments, including manufacturing plants, data centers, renewable energy installations, and utility substations. Seamless integration into existing industrial control and monitoring systems is a key advantage of the Littelfuse SE-330-21-00. It offers advanced network communication capabilities through two widely adopted industrial protocols: USB and DeviceNet. USB connectivity facilitates straightforward local configuration, diagnostics, and data retrieval, making setup and maintenance more efficient. The inclusion of DeviceNet, a robust and widely used CAN-based network protocol, allows for real-time data exchange and integration with SCADA systems, PLCs, and other intelligent devices on the plant floor. This dual-protocol support ensures that the SE-330-21-00 can be easily incorporated into both legacy and modern industrial automation architectures, providing comprehensive visibility into critical system parameters. The primary function of the SE-330-21-00 is to provide early detection of ground faults, which are a common cause of equipment damage, personnel injury, and system downtime. By continuously monitoring the insulation resistance and the neutral-grounding resistor, it can identify developing fault conditions before they escalate into major incidents. This proactive monitoring capability is crucial for preventing catastrophic failures and ensuring the safety of personnel and sensitive equipment. The device's precision in detecting subtle changes in ground resistance allows for timely intervention, minimizing potential disruptions and associated costs. Key features and benefits of the Littelfuse SE-330-21-00 include: * **Advanced Ground-Fault Detection:** Provides early warning of insulation degradation and ground faults, enhancing safety and preventing equipment damage. * **Neutral-Grounding Resistor Monitoring:** Ensures the integrity and proper functioning of essential grounding components. * **Wide Voltage Range:** Operates with AC (28–52V) and DC (36–72V) supply voltages, offering broad application flexibility. * **Dual Network Communication:** Supports USB for local access and DeviceNet for seamless integration with industrial networks and control systems. * **Enhanced System Reliability:** Contributes to uninterrupted power delivery by mitigating the risks associated with ground faults. * **Improved Safety:** Protects personnel and equipment from the hazards of electrical faults. * **Cost Reduction:** Minimizes downtime, reduces repair costs, and prevents potential liabilities. Littelfuse is a globally recognized leader in circuit protection and power control solutions, known for its commitment to quality, innovation, and reliability. The SE-330-21-00 exemplifies this commitment, offering a dependable and high-performance solution for critical industrial power management needs. Professionals in electrical engineering, plant maintenance, and system integration rely on Littelfuse products for their proven performance in demanding environments. The SE-330-21-00 is an ideal choice for applications requiring precise monitoring, robust communication, and unwavering reliability in the face of electrical challenges.
  • Advanced ground-fault and neutral-grounding resistor monitoring
  • Wide supply voltage range: 28–52V AC, 36–72V DC
  • Network communications via USB and DeviceNet
  • Enhances industrial power system safety and reliability
  • Ideal for critical manufacturing, utility, and data center applications

Specifications

Application
Low- and medium-voltage transformers and generators
Brand Name
Littelfuse
Series
SE-330
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.