Littelfuse Monitoring Relays
Littelfuse monitoring relays are designed to monitor and control electrical power conditions and quickly respond to faults to protect equipment and process. The relays are used in industrial automation, control panels, motor control centers and OEM machinery where accurate voltage, current, phase and frequency monitoring is needed. Littelfuse utilizes its knowledge of circuit protection to build monitoring relays for reliability in harsh industrial environments.
Voltage and phase monitoring relays monitor for over voltage, under voltage, loss of phase, incorrect phase sequence and phase imbalance in both single and three phase systems. These relays are used in motor protection circuits, pump and compressor control, conveyor control, HVAC equipment and industrial power distribution panels to prevent motor damage, nuisance trips and electrical faults.
Current monitoring relays monitor electrical current to detect overloads, under-loads, dry-run and stalled motor faults. These relays are used in pumps, fans, conveyors and rotating equipment to detect operating conditions before they become faults and can be used for predictive maintenance to help reduce down time. Other specialty monitoring relays for frequency monitoring and higher level protection applications are also available. All of the Littelfuse monitoring relays have adjustable set points, are DIN-rail mountable and meet all the common international standards for global industrial use.
FAQs
What are Littelfuse monitoring relays used for in industrial applications?
Littelfuse monitoring relays are used in industrial applications to continuously monitor voltage, current, phase, and frequency conditions and protect electrical equipment from abnormal operating conditions. They are commonly used in control panels, motor control centers, pumps, compressors, conveyors, HVAC systems, and industrial power distribution to prevent equipment damage and costly downtime.
What types of monitoring relays does Littelfuse offer?
Littelfuse offers voltage monitoring relays, phase monitoring relays, current monitoring relays, and frequency monitoring relays for single-phase and three-phase power systems. These monitoring relays are designed for motor protection, electrical fault detection, and power quality monitoring in industrial automation applications.
How do Littelfuse voltage and phase monitoring relays protect motors and equipment?
Littelfuse voltage and phase monitoring relays protect motors and equipment by detecting overvoltage, undervoltage, phase loss, incorrect phase sequence, and phase imbalance. When abnormal electrical conditions are detected, the relay output changes state to shut down the system or trigger an alarm, helping prevent motor overheating and electrical damage.
What are Littelfuse current monitoring relays used for?
Littelfuse current monitoring relays are used to detect overload, underload, dry-run, and stalled motor conditions in pumps, fans, conveyors, and rotating equipment. They provide early warning of abnormal operation, supporting predictive maintenance strategies and reducing unplanned downtime.
Are Littelfuse monitoring relays suitable for control panels and motor protection circuits?
Yes, Littelfuse monitoring relays are designed specifically for control panels and motor protection circuits. They feature adjustable setpoints, DIN-rail mounting, industrial voltage compatibility, and global certifications, making them ideal for OEM equipment and industrial automation systems.
Why choose Littelfuse monitoring relays over other industrial brands?
Littelfuse monitoring relays are chosen for their combination of accurate monitoring, robust construction, long service life, and deep circuit protection expertise. Engineers and panel builders trust Littelfuse for dependable electrical protection in demanding industrial environments.