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Electrical Power Fitting Bimetal Link Cable Connector

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This electrical power fitting is a bimetal link cable connector designed to join copper and aluminium conductors in low- and medium-voltage power systems. It uses a metallurgically bonded copper-aluminium transition plate or tube to prevent galvanic corrosion at the connection point. Available in bolted, compression, or combined formats, it suits cable lugs, busbars, switchgear, transformers, and overhead line fittings. Typical conductor range is 16–800 mm², with current ratings matched to project requirements. For procurement, the key value is stable contact resistance, high mechanical pull-out strength, and compatibility with both copper and aluminium conductors without additional transition plates. It reduces joint heating, corrosion risk, and maintenance in mixed-metal connections.
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1. Conductor Material and Connection Combination

Confirm the metals being joined:

  • Copper to aluminium: Standard bimetal connector with copper-aluminium transition.

  • Aluminium to aluminium: Aluminium connector or bimetal connector with aluminium-aluminium contact.

  • Copper to copper: Copper connector; bimetal is not required unless specified for standardization.

2. Conductor Type and Cross-Section

Identify the conductor form on each side:

  • Stranded cable, solid cable, busbar, tube, or lug.

  • Cross-section range: typically 16–800 mm², with custom sizes available.

  • Confirm whether the connector must accept different sizes on each side, such as 240 mm² aluminium cable to 120 mm² copper busbar.

3. Current, Voltage, and Short-Circuit Duty

  • Rated current: Match to continuous load current with margin for ambient temperature and grouping.

  • Voltage: Confirm insulation requirements for LV or MV applications.

  • Short-circuit withstand: Verify the connector can withstand the system short-circuit current without excessive temperature rise or mechanical damage.

4. Installation Method

TypeDescriptionTypical Use
BoltedMechanical clamp with boltsField assembly, adjustable, easy replacement
CompressionCrimped with hydraulic toolPermanent joints, lower contact resistance
CombinedBolted and compression featuresHigh-vibration or critical connections
Select based on available tools, maintenance requirements, and joint reliability.

5. Dimensions and Interface

Provide or confirm:

  • Bolt hole diameter and spacing

  • Palm width, length, and thickness

  • Stud size or thread

  • Cable entry diameter and orientation

  • Drawing or sample if non-standard

6. Material and Bonding Process

  • Copper side: T2, TU1, or equivalent copper.

  • Aluminium side: 1060, 1050, or equivalent aluminium.

  • Bonding: Friction welding, flash welding, or brazing. Friction welding is common for high-strength Cu-Al transition.

  • Surface treatment: Tin plating on copper side optional; aluminium side usually bare or oxidation-treated.

7. Installation Environment

  • Indoor: Standard design; confirm clearance and insulation.

  • Outdoor: UV, rain, and temperature cycling resistance.

  • Coastal or industrial: Specify corrosion protection and material compatibility.

  • High humidity: Confirm surface treatment and sealing if required.

  • Vibration: Use bolted or combined type with locking features.

8. Standards and Testing

Specify applicable standards:

  • IEC 61238-1: Compression and mechanical connectors for power cables.

  • GB/T 14315: Power cable connectors.

  • DL/T 759: Connectors for overhead lines.

  • Project-specific requirements for contact resistance, temperature rise, and short-circuit test.
    Request test reports for contact resistance, tensile strength, and temperature rise if required.

9. Packaging and Identification

  • Mark each connector with size, material, and batch number.

  • Pack in cartons or wooden cases to prevent deformation.

  • Include installation instructions if required.


Technical Specifications

ParameterUnitTypical Range / Option
Type—Bimetal link cable connector, bolted / compression / combined
Material—Copper T2/TU1 + Aluminium 1060/1050
Bonding Process—Friction welding, flash welding, brazing
Conductor Rangemm²16 – 800, custom
Copper Side Interface—Cable lug, busbar, tube, thread stud
Aluminium Side Interface—Cable lug, busbar, tube, thread stud
Bolt Size—M8, M10, M12, M16, custom
Bolt Hole SpacingmmAccording to drawing
Rated CurrentA100 – 2000, depending on cross-section
Rated VoltageVLV / MV as required
Contact Resistance—≤ 1.1 × reference copper joint
Temperature RiseK≤ 45 K at rated current
Short-Circuit WithstandkAAccording to system requirement
Surface Treatment—Copper side tin plating optional; aluminium side bare
Protection—Indoor / outdoor
Standards—IEC 61238-1, GB/T 14315, DL/T 759
Packing—Carton, wooden case, pallet

Note: Dimensions, current ratings, and interface details are customized. Confirm against drawings or samples before ordering.


Typical Applications

  • Transition between aluminium cable and copper busbar

  • Transformer, switchgear, and control gear terminals

  • Outdoor overhead line connections

  • Substation busbar and equipment connections

  • Renewable energy inverters, battery storage, and power converters

  • Industrial power distribution and motor connections

  • Areas where copper and aluminium conductors must be joined without direct contact


Country of Origin: China (Mainland)


Type:Bimetal link


Application:Power, Cable Connector


Gender:Other


Name:Cable Connector


Material:E-Cu; Al-99.6%


Surface treatment:Bright


Color:Silver,Customized


Certificate:CE ROHS ISO9001


Feature:Simple Installation,Safe Use,Cheap


HS Code: 8536909000


OEM:Provided


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  +852 84960208