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Under voltage coil
Under voltage coils, also known as undervoltage releases or UVR coils, are critical protection devices used in electrical distribution and motor control systems. These coils are designed to automatically trip a circuit breaker or contactor when the supply voltage drops below a predetermined threshold, typically between 35% and 70% of the rated v...
Under voltage coils, also known as undervoltage releases or UVR coils, are critical protection devices used in electrical distribution and motor control systems. These coils are designed to automatically trip a circuit breaker or contactor when the supply voltage drops below a predetermined threshold, typically between 35% and 70% of the rated voltage. They are commonly integrated into molded case circuit breakers (MCCBs), air circuit breakers (ACBs), and contactors to prevent equipment damage, restart hazards, and unsafe operating conditions. Under voltage coils are available in various voltage ratings (e.g., 24V AC/DC, 48V, 110V, 230V, 400V AC) and are often specified with a time delay feature to avoid nuisance tripping during momentary voltage dips. These devices are essential for compliance with safety standards like IEC 60947 and are widely used in industrial automation, power distribution panels, and critical infrastructure.
Under voltage coils find extensive applications in industrial environments where voltage stability is critical for process continuity and personnel safety. They are installed in main distribution boards (MDBs), motor control centers (MCCs), and generator control panels to ensure automatic disconnection of loads during undervoltage conditions. Key sectors include manufacturing plants, water treatment facilities, data centers, oil and gas installations, and commercial buildings. In automation systems, these coils are used with contactors and relays to implement emergency stop circuits and undervoltage protection schemes. They are also common in elevator control panels, HVAC systems, and renewable energy installations like solar inverters and wind turbines, where grid voltage fluctuations can cause equipment malfunction.
Within our catalog, under voltage coils are organized by voltage rating and compatibility with specific breaker series. Key subcategories include coils for MCCBs (e.g., for ABB SACE, Schneider NSX, Siemens 3VA series), ACBs (e.g., for ABB Emax, Schneider MT), and contactors. Article codes typically follow a pattern like "UVC-XXXX-YYY", where "XXXX" indicates the voltage rating (e.g., 230V) and "YYY" denotes the breaker series (e.g., NSX). For example, the code "UVC-230-NSX" corresponds to a 230V AC undervoltage coil for Schneider NSX breakers. Other common codes include "UVC-110-3VA" for Siemens 3VA series and "UVC-24-EMAX" for ABB Emax ACBs. We also stock universal under voltage coils with adjustable voltage thresholds for custom applications.
Partnering with Electric Automation Network ensures access to genuine under voltage coils from leading manufacturers, with real-time pricing and stock availability. Our engineering team provides technical support for coil selection, wiring diagrams, and integration into existing protection schemes. We offer express worldwide shipping, with most orders dispatched within 24 hours. Additionally, we provide detailed technical documentation, including datasheets, installation guides, and compliance certificates, to facilitate seamless procurement and installation. Whether you need a standard 230V AC coil or a specialized time-delay unit for a critical process, we deliver the right solution with expert guidance.
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