Littelfuse SE-330-21-01 - SE-330-21-01 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-330-21-01

Alternate Item Number: SE-330-21-01

UPC: 079458988505


Documents & Media
BrochureTechnical BulletinSpecification SheetVideo ClipUser Manual

Contact for Pricing

Overview

The Littelfuse SE-330-21-01 stands as a sophisticated and reliable solution for monitoring ground-fault and neutral-grounding resistor integrity within critical industrial power systems. Engineered by Littelfuse, a recognized leader in circuit protection and power control, this advanced monitor ensures the continuous safety and operational efficiency of your electrical infrastructure. Its robust design accommodates a broad supply voltage range, accepting AC inputs from 28 to 52 volts and DC inputs from 36 to 72 volts, making it exceptionally versatile for diverse applications. This monitor's primary function is to detect subtle deviations in ground-fault current and neutral-grounding resistor performance, providing early warnings to prevent potential equipment damage, system downtime, and safety hazards. By proactively identifying issues, the SE-330-21-01 empowers maintenance teams to address problems before they escalate into costly failures. Its advanced detection algorithms offer high sensitivity and accuracy, crucial for maintaining the stability of sensitive industrial processes. A key differentiator of the SE-330-21-01 is its integrated network communication capabilities. It supports both USB and DeviceNet protocols, facilitating seamless integration into existing industrial automation and control networks. This connectivity allows for real-time data acquisition, remote monitoring, and streamlined diagnostics, enhancing operational visibility and control. The ability to communicate via DeviceNet is particularly valuable in complex manufacturing environments where standardized industrial communication is paramount. Applications for the Littelfuse SE-330-21-01 are extensive and include: * **Industrial Automation:** Protecting critical machinery and control systems in manufacturing plants. * **Power Distribution:** Ensuring the integrity of substations and distribution networks. * **Data Centers:** Safeguarding sensitive IT infrastructure from electrical anomalies. * **Renewable Energy:** Monitoring grounding systems in solar and wind farms. * **Process Control:** Maintaining stable power for sensitive process equipment in chemical plants, refineries, and more. The SE-330-21-01 is designed for straightforward installation and configuration, minimizing disruption to ongoing operations. Its durable construction ensures reliable performance even in harsh industrial environments. Choosing the Littelfuse SE-330-21-01 means investing in a proven technology that enhances safety, reliability, and operational intelligence for your critical power systems. Trust Littelfuse for advanced monitoring solutions that protect your assets and ensure uninterrupted productivity.
  • Advanced ground-fault and neutral-grounding resistor monitoring
  • Wide supply voltage range: 28–52 VAC and 36–72 VDC
  • Network communications via USB and DeviceNet
  • Ensures reliable industrial power system safety and performance
  • Ideal for industrial automation and power distribution

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
Relay Accessories, Sockets & Clips, Printed Circuit Board, Phenolic, Printed Circuit Board, 6, Socket, Potter & Brumfield R10

1-1393143-3

Relay Accessories, Sockets & Clips, Printed Circuit Board, Phenolic, Printed Circuit Board, 6, Socket, Potter & Brumfield R10
Relay Accessories, Sockets & Clips, Solder, Polyester, Printed Circuit Board, 2, Socket, Potter & Brumfield R10

1-1393143-6

Relay Accessories, Sockets & Clips, Solder, Polyester, Printed Circuit Board, 2, Socket, Potter & Brumfield R10
RTXD Extractor Tool

6896057-1

RTXD Extractor Tool
Power supply for DIN-rail

PS-60

Power supply for DIN-rail
IP67 SCP-X Extreme Environment Series Power Supply. Double Stacked, Output Power 2 x 100W, Output Voltage 24 Vdc, Output Current 7.6 A total, 3.8 A per pair

SCP102D24X-C02

IP67 SCP-X Extreme Environment Series Power Supply. Double Stacked, Output Power 2 x 100W, Output Voltage 24 Vdc, Output Current 7.6 A total, 3.8 A per pair

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.