SBG Bimetallic Copper-Aluminum Transformer Terminal Clamp
The SBG bimetallic transformer terminal clamp is designed to provide a bolted electrical connection between a copper transformer terminal or conductive stud and an aluminum terminal palm, busbar or equipment connection. It is commonly used on transformer bushings and electrical equipment terminals in power distribution and substation installations.
The clamp combines a copper contact section with an aluminum terminal palm to form a controlled copper-to-aluminum transition. This structure helps avoid an uncontrolled direct connection between dissimilar conductor materials while providing a detachable and serviceable terminal connection.
Key Features
- Copper-aluminum bimetallic transition structure
- Split copper clamp for connection to a transformer conductive stud
- Multi-bolt aluminum terminal palm
- Bolted installation without conductor crimping
- Available for different transformer terminal-stud sizes
- Designed for transformer and electrical-equipment terminal connections
- Replaceable and accessible bolted connection structure
- Custom dimensions, drilling patterns and packaging available
Materials and Construction
The SBG transformer clamp consists of a copper contact section, an aluminum terminal palm and fastening hardware. The copper section is designed to fit around the applicable transformer conductive stud, while the aluminum palm provides a flat bolted connection point for the mating conductor terminal, busbar or equipment connector.
The copper and aluminum sections are joined using a manufacturer-controlled bimetallic transition process according to the approved product drawing. Copper grade, aluminum grade, transition process, bolt material, washer configuration and surface-treatment requirements must be confirmed before production.
Electrical Connection Function
The clamp transfers current from the transformer terminal through the copper contact section and bimetallic transition to the aluminum terminal palm. Correct model selection, clean contact surfaces, specified tightening torque and compatible mating components are essential for maintaining stable electrical contact.
Current-carrying capacity, contact resistance, temperature rise and short-circuit performance depend on the selected model, material specification, contact area, bolt arrangement and applicable testing requirements. These values must be confirmed through the approved technical data and test documentation.
Typical Applications
- Distribution transformer bushing terminals
- Power transformer terminal connections
- Transformer conductive-rod connections
- Copper-to-aluminum transition connections
- Substation equipment terminal connections
- Busbar and equipment downlead connections
- Indoor or outdoor transformer installations when specified
Model Selection
SBG identifies a product series rather than one fixed specification. Individual SBG models are normally selected according to the transformer conductive-stud thread or diameter, aluminum palm dimensions, bolt-hole pattern, conductor or busbar requirement and electrical operating conditions.
The complete model designation and approved drawing must be confirmed before publishing dimensions, conductor range, current rating or installation torque.
Installation Considerations
- Confirm that the clamp model matches the transformer terminal stud
- Clean copper and aluminum contact surfaces before assembly
- Use approved contact compound where required by the project specification
- Tighten all fasteners evenly to the specified installation torque
- Avoid damaging the copper-aluminum transition joint during installation
- Verify bolt tightness and terminal temperature during scheduled maintenance
Reference Standard
The product can be manufactured and inspected with reference to GB/T 2314 when specified in the purchase contract. Final electrical, mechanical, dimensional, heat-cycle and acceptance requirements are determined by the confirmed model, applicable project standard, approved drawing and agreed inspection documentation.
Quality and Inspection
- Copper and aluminum material verification
- Bimetallic transition-joint inspection
- Dimensional and bolt-hole pattern verification
- Contact-surface and workmanship inspection
- Bolt, nut and washer assembly inspection
- Electrical resistance and heat-cycle testing when specified
- Marking, packaging and traceability verification
Information Required for Selection
To select the correct SBG transformer clamp, please provide the transformer terminal-stud diameter or thread, mating conductor or busbar material, conductor cross-section, terminal-palm dimensions, bolt-hole pattern, operating current, installation environment, applicable standard and project drawing.
Customization and Inquiry
JIUJIN POWER can supply SBG bimetallic transformer terminal clamps according to approved drawings and project specifications. Contact us with your required model, terminal-stud size, conductor or busbar information, quantity and destination for technical confirmation and quotation.
