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

Product Description

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

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

This relay works on the bimetal thermal principle with CT input, where motor current is scaled through CTs and converted into heat energy in the bimetal strips. Under abnormal conditions such as overload, phase failure, or current imbalance, the bimetal elements bend and activate the trip mechanism, disconnecting the motor to prevent overheating and insulation damage.

The 3UC6230-5A is typically used in lower current CT-operated motor protection ranges, offering dependable and stable tripping characteristics suitable for continuous industrial duty applications like pumps, compressors, conveyors, and process machinery.

🔹 Key Features

• Siemens CT-operated heavy-duty bimetal relay
• Model: 3UC6230-5A
• Part of 3UC6 motor protection relay series
• CT-based sensing for extended current range applications
• Protection against overload, phase failure, and current imbalance
• Designed for medium-duty industrial motor protection
• High thermal stability and reliable tripping response
• Suitable for continuous and heavy starting loads
• Robust industrial-grade construction
• Compatible with Siemens contactor-based motor starters
• Long service life with minimal maintenance requirement
• IEC 60947-4-1 compliant design