CT operated heavy duty bimetal-relay-3UC5830-5G

Product Description

CT Operated Heavy Duty Bimetal Relay – 3UC5830-5G

The Siemens 3UC5830-5G is a CT-operated heavy-duty bimetal overload relay designed for reliable protection of industrial motors under heavy starting and long acceleration conditions. It belongs to the Siemens 3UC5 series, which is specifically engineered for applications where motors experience high inrush current, long starting time, and continuous heavy load duty.

This relay operates on a current transformer (CT) based bimetal thermal principle, where motor current is sensed through CTs and converted into proportional heating of the bimetal elements. In case of overload, phase failure, or current imbalance, the bimetal strips bend and activate the tripping mechanism, disconnecting the motor to prevent overheating and winding damage.

The 3UC5830-5G is generally used in medium-to-heavy current motor applications (around 40–63 A class depending on CT configuration) and is suitable for demanding industrial environments such as conveyors, compressors, pumps, crushers, and continuous process machinery.

🔹 Key Features

• Siemens CT-operated heavy-duty bimetal relay
• Model: 3UC5830-5G
• Part of 3UC5 motor protection relay series
• Designed for heavy starting and long acceleration loads
• CT-operated system for extended current range protection
• Protection against overload, phase loss, and current imbalance
• Suitable for medium-to-heavy industrial motors
• High thermal stability and precise tripping performance
• Robust industrial-grade construction
• Compatible with Siemens contactor-based motor starters
• Reliable operation in continuous-duty applications
• Long service life and low maintenance requirement