Littelfuse EFCT-1 - The EFCT series is a sensitive nickel-core current transformer used with Littelfuse relays to detect low levels of earth-leakage current.
Littelfuse

EFCT-1

Alternate Item Number: EFCT-1

UPC: 079458977684

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Overview

The **Littelfuse EFCT-1** is a high-sensitivity nickel-core current transformer engineered for accurate earth-leakage current detection in industrial electrical systems. Designed to work seamlessly with Littelfuse relays, this transformer provides precise monitoring of low-level fault currents, enabling early fault detection and enhanced system safety. Its nickel-core construction ensures superior magnetic permeability and stability, making it ideal for applications where even minute leakage currents must be detected before they escalate into hazardous conditions. Earth-leakage current transformers like the EFCT-1 are critical components in **ground fault protection systems**, particularly in industrial environments where electrical safety is paramount. These transformers detect imbalances in current flow between live conductors and ground, signaling potential insulation faults, equipment degradation, or hazardous ground faults. The EFCT-1’s sensitive nickel-core design allows it to respond to currents as low as a few milliamps, providing the precision required for compliance with stringent safety standards such as IEC 60947-2 and UL 943. **Key Applications and Industries** The EFCT-1 is widely used in a variety of industrial and commercial applications, including: - **Manufacturing facilities** where machinery and equipment require continuous monitoring for ground faults. - **Data centers and critical infrastructure** to protect sensitive electronic systems from leakage-induced damage. - **Renewable energy systems** such as solar and wind power installations, where ground fault detection is essential for system integrity. - **Hospitals and laboratories** where electrical safety is non-negotiable to prevent equipment failure or patient risk. - **Commercial buildings** with extensive electrical wiring, ensuring compliance with local electrical codes and reducing downtime. **Why Choose Littelfuse?** Littelfuse is a globally recognized leader in circuit protection, power management, and sensing solutions, with decades of expertise in developing reliable protection devices for industrial applications. The EFCT-1 leverages Littelfuse’s commitment to quality, ensuring long-term durability, consistent performance, and compatibility with their extensive line of relays and protection systems. Professionals in the electrical industry trust Littelfuse for its rigorous testing, adherence to international standards, and responsive technical support. **Installation and Integration** The EFCT-1 is designed for easy installation in both new and retrofit applications. Its compact form factor allows for flexible mounting options, while its robust construction ensures reliable operation in harsh industrial environments. When paired with Littelfuse relays, the transformer provides a complete ground fault protection solution, enabling system integrators to configure alarm thresholds, trip settings, and monitoring parameters with precision. Proper installation involves: - Mounting the transformer around the conductor to be monitored, ensuring a clean and secure fit. - Connecting the secondary winding to a compatible Littelfuse relay for signal processing. - Calibrating the system to detect leakage currents within the desired sensitivity range. **Benefits of the EFCT-1** - **High Sensitivity:** Detects low-level earth-leakage currents with exceptional accuracy, reducing the risk of undetected faults. - **Nickel-Core Technology:** Offers superior magnetic performance and stability, even in fluctuating temperature conditions. - **Compatibility:** Designed to integrate seamlessly with Littelfuse relays, ensuring a cohesive protection system. - **Durability:** Built to withstand industrial environments, including exposure to dust, moisture, and mechanical stress. - **Safety Compliance:** Helps meet critical safety standards, protecting personnel and equipment from electrical hazards. For industrial professionals seeking a reliable, high-performance earth-leakage current transformer, the **Littelfuse EFCT-1** delivers unmatched sensitivity, durability, and compatibility. Whether safeguarding critical infrastructure or ensuring compliance in commercial installations, this transformer is a trusted choice for precise fault detection and system protection.
  • High-sensitivity nickel-core design for precise earth-leakage detection
  • Compatible with Littelfuse relays for integrated ground fault protection
  • Compact and durable construction for industrial environments
  • Meets stringent safety standards for critical applications
  • Easy installation and calibration for seamless system integration

Specifications

Application
Industrial
Brand Name
Littelfuse
Material
Nickel-core
Mounting Type
Mounting around conductor
Series
EFCT
Special Features
High Quality
Sub Brand
Relay Series
Type
Protection Relays and Controls
Package Weight (Imperial)
1.980 L
Package Weight (Metric)
0.900 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.