CAPG Series Bimetal Parallel Groove Clamps are premium utility-grade overhead connectors engineered to establish a reliable, non-tension connection between aluminum-based conductors (AAC, AAAC, ACSR) and copper conductors. When copper and aluminum merge directly in atmospheric tracking, severe galvanic corrosion instantly destroys the joint. The CAPG series solves this critical risk by incorporating a high-purity electrolytic copper composite liner permanently bonded to the aluminum channel chamber, creating a flawless molecular barrier that prevents electrochemical tracking and ensures low contact resistance across distribution grids.
ContactSpecifications
| Part No. | Item | Main Cable Aluminium mm² |
Branch Cable Copper mm² |
Number of Bolts |
| B011101 |
CAPG-A1 |
16-70 | 6-50 |
1xM8 |
| B011102 |
CAPG-A2 |
25-150 | 10-95 |
1xM8 |
| B011103 |
CAPG-B1 |
16-70 | 6-50 |
2xM8 |
| B011104 |
CAPG-B2 |
25-150 | 10-95 |
2xM8 |
| B011105 |
CAPG-B3 |
35-200 | 25-185 |
2xM10 |
| B011106 |
CAPG-C1 |
16-70 | 6-50 |
3xM8 |
| B011107 |
CAPG-C2 |
25-150 | 10-95 |
3xM8 |
| B011108 |
CAPG-C3 |
16-70 | 25-185 |
3xM10 |
| B011109 |
CAPG-C4 |
35-300 | 35-240 |
3xM10 |
Features
Integrated CAPG Bimetallic Liner
Engineered with an integrated high-purity electrolytic copper sheet permanently hot-bonded inside the aluminum clamping channel. This specialized metallurgical interface forms a rigid, gap-free barrier that completely blocks out moisture ingress and prevents galvanic oxidation between dissimilar wires.
Serrated Mechanical Tooth Grooves
The internal clamping channels of the CAPG matrix are precisely machined with sharp cross-serrations. When the bolts are torqued down, these metallic teeth easily pierce through the stubborn natural oxide skin of the conductor strands, optimizing electrical conductivity immediately without manual wire scraping.
Interlocking High-Torque Bolt Layout
Secured by high-tensile hot-dip galvanized or stainless steel bolts paired with pressure-distributing spring washers. This structural matrix maintains constant, high-tonnage residual clamping force over decades of environmental thermal expansion and load cycles.
Weather-Resilient Dry Application
Designed explicitly for clean, rapid out-of-the-box field implementation. The dry, ungreased parallel grooves are smoothly finished and deburred, eliminating chemical compound mess overhead while providing a superior mechanical and electrical connection profile.
Implementation Instructions
Step 1: Conductor Channel Alignment
Loosen the top clamping bolts to separate the CAPG pressure pads. Identify the designated aluminum groove side and the copper-lined groove side of the clamp, then place the corresponding aluminum main line and copper branch line cleanly and parallel into their respective channels.
Step 2: Symmetrical Bolt Pre-Staging
Align the upper aluminum clamping pad straight over the conductor matrix. Hand-tighten the high-tensile steel bolts to ensure the conductors seat squarely inside the machined serrated grooves without shifting or overlapping the strands.
Step 3: Calibrated Torque Tightening
Deploy a certified mechanical torque wrench to tighten the bolt assemblies sequentially. Apply the exact utility-specified mechanical torque to permanently lock the connection, ensuring the spring washers are compressed completely flat for non-reversible grid security.
Step 4: High-Load Mechanical Torque & Hot-Line Safety
Because CAPG parallel groove clamps are fully conductive exposed metallic assemblies, linesmen must maintain rigorous clearance protocols when carrying out termination sequences near active lines. Fully insulated torque wrenches, approved high-voltage safety gloves, and safety goggles are highly mandatory to prevent accidental phase short circuits or arc tracking during field distribution cross-overs.
Industrial Engineering & Standards
High-performance CAPG bimetallic connecting hardware fully batch-tested and qualified to maintain low electrical degradation across severe utility infrastructure profiles:
- Premium Metallurgical Integrity: Forged from structural-grade aluminum alloy paired with a high-conductivity copper composite layer that delivers exceptional natural electrical and thermal dissipation coefficients.
- Rigid Code Compliance: Thoroughly design-qualified, mechanically stress-tested, and fully certified to meet or exceed the demanding criteria of international grid codes including IEC 61238-1 and standard utility electrical guidelines.
- Thermal Expansion Cushion: The structural elasticity of the wrought CAPG aluminum matrix smoothly absorbs mechanical stresses from environmental dynamic load fluctuations, entirely avoiding loose joints or mechanical torque creep over time.
