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

Product Description

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

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

This relay works on a CT-based bimetal thermal principle, where motor current is stepped down through current transformers and fed into the relay heating system. In case of overload, phase failure, or current imbalance, the bimetal elements deflect and activate the trip mechanism to disconnect the motor, preventing thermal damage and winding failure.

The 3UC5830-5C is typically used for medium-to-heavy current motor ranges (approx. 16–25 A class depending on CT configuration) and is suitable for demanding industrial applications requiring Class 10 / heavy-duty protection characteristics.

🔹 Key Features

• Siemens CT-operated heavy-duty bimetal relay
• Model: 3UC5830-5C
• Part of 3UC5 motor protection relay series
• Designed for heavy starting and long acceleration loads
• CT-operated system for higher current applications
• Protection against overload, phase loss, and current imbalance
• Suitable for large industrial motor protection
• High thermal stability and accurate tripping performance
• Robust construction for harsh industrial environments
• Compatible with Siemens contactor-based motor starters
• Long service life with minimal maintenance
• Reliable operation in continuous-duty systems