CT operated heavy duty bimetal-relay-3UC6230-5J

Product Description

CT Operated Heavy Duty Bimetal Relay – 3UC6230-5J

The Siemens 3UC6230-5J is a CT-operated heavy-duty bimetal overload relay designed for reliable protection of industrial motors operating under medium to heavy starting conditions. It belongs to the Siemens 3UC6 series, which is engineered for applications requiring extended current range motor protection using current transformer (CT) operation.

This relay works on the bimetal thermal principle combined with CT current sensing, where motor current is stepped down through CTs and converted into heat energy in the bimetal strips. When abnormal conditions such as overload, phase loss, or current imbalance occur, the bimetal elements deflect and activate the trip mechanism to disconnect the motor, preventing overheating and winding damage.

The 3UC6230-5J is suitable for low-to-medium current CT-based motor protection applications, commonly used in industrial systems where stable and reliable thermal tripping is required for continuous duty operation.

🔹 Key Features

• Siemens CT-operated heavy-duty bimetal relay
• Model: 3UC6230-5J
• Part of 3UC6 motor protection relay series
• CT-based sensing for extended current range protection
• Protection against overload, phase failure, and current imbalance
• Suitable for medium-duty industrial motors
• Stable thermal tripping performance
• High reliability under continuous operation
• Robust industrial-grade construction
• Compatible with Siemens contactor-based motor starters
• Long service life with low maintenance requirement
• IEC 60947-4-1 compliant design