Littelfuse SE-330-03-00 - SE-330-03-00 is an advanced ground-fault and neutral-grounding resistor monitor with a supply voltage ac of 65–265 and a supply voltage dc of 85–275. Network communications is offered via USB; Ethernet (Dual RJ45).
Littelfuse

SE-330-03-00

Alternate Item Number: SE-330-03-00

UPC: 079458988413


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Overview

The Littelfuse SE-330-03-00 is a state-of-the-art ground-fault and neutral-grounding resistor monitor engineered for mission-critical industrial applications where electrical safety and system reliability are non-negotiable. Designed to detect ground faults and monitor neutral-grounding resistors in medium-voltage and high-voltage systems, this advanced monitor delivers unparalleled protection against electrical hazards, equipment damage, and costly downtime. With a robust voltage range spanning 65–265 VAC and 85–275 VDC, the SE-330-03-00 ensures seamless operation across diverse power distribution networks, including industrial plants, data centers, renewable energy facilities, and commercial buildings. Its dual Ethernet (RJ45) and USB connectivity enable real-time data transmission, remote diagnostics, and integration with SCADA systems, building management systems (BMS), and industrial IoT platforms for comprehensive monitoring and control. Ground-fault detection is a cornerstone of electrical safety in industrial environments, where even minor faults can escalate into catastrophic failures. The SE-330-03-00 excels in identifying ground faults by continuously monitoring current flow through neutral-grounding resistors, providing early warnings to prevent arc flashes, equipment burnout, and personnel hazards. Its neutral-grounding resistor monitoring ensures that grounding systems remain within optimal resistance ranges, maintaining compliance with NEC, IEC, and other international safety standards. This dual-functionality approach makes it an indispensable tool for engineers and facility managers tasked with maintaining electrical safety and operational efficiency. What sets the Littelfuse SE-330-03-00 apart is its robust design and advanced communication capabilities, which cater to the demanding requirements of modern industrial applications. The monitor’s wide voltage range accommodates fluctuating power conditions, while its dual Ethernet ports support redundant network connections for fail-safe communication. The inclusion of USB connectivity simplifies firmware updates, configuration, and local data retrieval, reducing maintenance overhead. Additionally, the device’s compact form factor and DIN-rail mounting compatibility make it ideal for space-constrained electrical rooms and control panels. Industries that benefit most from the SE-330-03-00 include: - **Manufacturing:** Protects machinery and personnel in factories with high-power equipment. - **Data Centers:** Ensures uninterrupted power supply (UPS) systems remain fault-free. - **Renewable Energy:** Monitors ground-fault conditions in solar and wind power installations. - **Healthcare:** Safeguards critical medical equipment and life-support systems. - **Mining & Oil & Gas:** Provides reliable ground-fault detection in harsh, high-risk environments. Littelfuse, a global leader in circuit protection and electrical safety solutions, has built a reputation for delivering high-performance monitoring devices that enhance system reliability and safety. With decades of expertise in industrial electrical protection, Littelfuse’s SE-330-03-00 reflects the company’s commitment to innovation, quality, and customer-centric design. Professionals in electrical engineering, facility management, and industrial automation trust Littelfuse products to mitigate risks and ensure compliance with stringent safety regulations. Installation and integration of the SE-330-03-00 are straightforward, thanks to its modular design and comprehensive documentation. The device can be easily integrated into existing monitoring systems via Modbus TCP, Ethernet/IP, or other industrial protocols, enabling centralized control and data logging. Regular maintenance is simplified with self-diagnostic features and remote access capabilities, reducing the need for on-site inspections. For facilities prioritizing electrical safety, operational efficiency, and regulatory compliance, the Littelfuse SE-330-03-00 is the definitive choice for ground-fault and neutral-grounding resistor monitoring.
  • Dual Ethernet (RJ45) & USB connectivity for real-time monitoring and diagnostics
  • Wide voltage range: 65–265 VAC / 85–275 VDC for versatile power compatibility
  • Continuous ground-fault and neutral-grounding resistor monitoring
  • Modbus TCP & Ethernet/IP support for seamless SCADA/BMS integration
  • Compact DIN-rail design with redundant network connectivity options

Specifications

Application
Low- and medium-voltage transformers and generators
Brand Name
Littelfuse
Connection Type
USB, Ethernet (Dual RJ45)
Mounting Type
DIN-Rail
Series
SE-330
Special Features
Continuous NGR monitoring
Sub Brand
SE 330 Series
Type
Neutral-grounding resistor monitor
Voltage Rating
65–265 VAC, 85–275 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.