Littelfuse SE-601-0U - SE-601-0U is a sensitive ground-fault monitor with a supply voltage ac of 120–240 and a supply voltage dc of 100–240.
Littelfuse

SE-601-0U

Alternate Item Number: SE-601-0U

UPC: 079458989038

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Overview

The Littelfuse SE-601-0U is a sophisticated, microprocessor-based ground-fault relay engineered for the critical protection of ungrounded DC systems. Designed to provide highly sensitive ground-fault detection without the common issue of nuisance tripping, this unit is essential for maintaining the integrity and safety of sensitive electrical installations. Its operation relies on the SE-GRM Series Ground-Reference Module, a crucial accessory that limits ground-fault current to a precise 25 mA, ensuring reliable fault identification. The SE-601-0U is exceptionally versatile, suitable for a broad spectrum of ungrounded DC systems. From industrial 24 VDC control circuits to high-voltage 1000 VDC solar and transportation systems, its adaptability makes it a premier choice for diverse applications. This monitor is vital for preventing equipment damage, ensuring personnel safety, and minimizing downtime in environments where reliable power is paramount. Key features and benefits of the Littelfuse SE-601-0U include: * **Adjustable Pickup (1-20 mA):** Offers ten distinct settings, providing a wide range of low-level protection tailored to specific system requirements. * **Adjustable Time Delay (50 ms - 2.5 s):** Allows for flexible trip delay settings, enabling either rapid fault response or a delayed reaction to accommodate system dynamics. * **Output Contacts:** Equipped with isolated Form A and Form B output contacts, facilitating independent operation of annunciation and trip circuits. * **Analog Output (0-5 V):** Provides a means to connect to external meters, such as the optional PGA-0500 Analog % Current Meter, or integrate with control systems for enhanced monitoring. * **Non-Volatile Trip Memory:** Retains the trip state even when de-energized, significantly simplifying troubleshooting and post-fault analysis. * **Selectable Contact Operating Mode:** Features selectable fail-safe or non-fail-safe operating modes, allowing seamless integration with shunt or undervoltage breaker coils. * **Microprocessor-Based Design:** Eliminates the need for calibration, leading to reduced maintenance costs and consistent performance over time. Installation is straightforward, with standard DIN and surface mounting options. Panel mounting is also supported with optional PMA-55 or PMA-60 adapters. The SE-601-0U boasts robust approvals, including CSA certification, UL Listing (E340889), CE marking for European Union compliance, and C-Tick certification for Australia, underscoring its global reliability and adherence to stringent safety standards. Backed by a 5-year warranty, the Littelfuse SE-601-0U represents a secure, long-term investment in system protection. Its ability to precisely detect and report ground faults in ungrounded DC systems makes it an indispensable component in modern industrial automation, renewable energy infrastructure, and critical transportation networks.
  • Microprocessor-based ground-fault relay for ungrounded DC systems
  • Sensitive ground-fault detection with adjustable pickup (1-20 mA)
  • Adjustable time delay settings (50 ms - 2.5 s)
  • Isolated Form A and Form B output contacts for annunciation and trip circuits
  • UL Listed, CSA Certified, CE, C-Tick approved with a 5-year warranty

Specifications

Application
Industrial
Brand Name
Littelfuse
Current Rating
25 mA
Mounting Type
DIN, surface, panel (with adapters)
Poles
Form A and Form B output contacts
Series
SE-GRM Series Ground-Reference Module compatible
Special Features
Analog output for external metering
Sub Brand
SE 601 Series
Type
Ground Fault Relays
Voltage Rating
120-240 VAC / 100-240 VDC
Package Weight (Imperial)
1.100 L
Package Weight (Metric)
0.500 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.