The WCJB Copper Plum Clamp represents a premium connection solution for high-voltage power lines, engineered to provide secure and conductive joints in overhead transmission and distribution networks.
WCJB
Mingxu
Precision-manufactured from high-purity copper, this clamp delivers exceptional electrical performance combined with superior mechanical strength, making it ideal for critical power line connections subject to high current loads and environmental stress. Available in sizes ranging from WCJB-1 (16-25 mm²) to WCJB-10 (185-240 mm²), it accommodates diverse conductor sizes while maintaining consistent connection quality. Its nickel-plated finish enhances corrosion resistance, ensuring long-term reliability in even the harshest outdoor environments.
Machined from T2 red copper (99.9% pure), the WCJB clamp achieves outstanding electrical conductivity of ≥97% IACS, minimizing power loss at connection points. The copper material’s malleability allows for secure gripping of conductors while maintaining structural integrity under thermal cycling.
A tin-plated surface finish (5-10 µm thickness) protects against atmospheric corrosion, tarnishing, and oxidation, critical for outdoor installations exposed to rain, humidity, and industrial pollutants. The plating also reduces contact resistance by providing a uniform, low-oxide interface between clamped surfaces.
The clamp features a bolted design with precision-machined components that ensure uniform pressure distribution across the conductor surface. Its robust construction provides tensile strength exceeding 200 MPa, withstanding mechanical stresses from wind-induced conductor movement and thermal expansion/contraction.
In high-voltage transmission networks (11kV to 220kV), the WCJB Copper Plum Clamp is used for connecting jumper cables, repairing conductor breaks, and joining different conductor sections. Its high current capacity makes it suitable for main transmission lines carrying bulk power.
Within electrical substations, these clamps provide reliable connections between busbars, transformer leads, and outgoing feeders. Their compact design allows for installation in congested substation environments while maintaining proper clearance distances.
Heavy industrial facilities with dedicated power feeders utilize WCJB clamps for connecting service entrances to internal distribution systems. The clamps’ high conductivity supports the large current demands of industrial machinery and processes.
The clamps are designed for use with solid and stranded copper conductors, as well as copper-clad aluminum conductors within the specified cross-sectional ranges. They accommodate both circular and sector-shaped conductors commonly used in power transmission.
Installation involves cleaning conductor surfaces, positioning the clamp around the conductor joint, and tightening the bolts to the specified torque (15-40 Nm depending on size). Proper surface preparation is critical—conductors should be free of oxide, dirt, and corrosion before clamping.
Annual visual inspections are recommended to check for loose bolts, corrosion, or overheating signs (discoloration). Torque verification should be performed every 3-5 years. The tin plating typically provides 15-20 years of corrosion protection in normal environments before requiring reconditioning.
Yes, the clamps meet GB/T 14315 (Chinese standard for cable lugs) and are compatible with IEC 61238-1 requirements for power connectors. They are also RoHS-compliant, ensuring they contain no hazardous substances that could impact environmental or human health.
| Item No. | Conductor | L | L1 | L2 | A | A1 | b | φ | R | Package pcs | Gross Weight |
| WCJB-1 | 16-25 | 39.5 | - | 13 | 25 | 16.5 | 2.8 | 8.8 | 3.5 | 1000 | 18kg |
WCJB-2 | 25-35 | 45 | 13 | 13 | 22 | 18 | 2.8 | 8.5 | 3.5 | 1000 | 18kg |
| WCJB-3 | 35-50 | 52.5 | 13.5 | 13.5 | 24.5 | 21 | 2.9 | 10.5 | 4 | 800 | 24kg |
| WCJB-4 | 50-70 | 57 | 16 | 16 | 27.5 | 22 | 3 | 10.5 | 5 | 600 | 25kg |
| WCJB-5 | 70-95 | 61 | 19 | 19 | 31 | 23 | 3 | 10.5 | 5.5 | 400 | 25.5kg |
| WCJB-6 | 95-120 | 69 | 20 | 20 | 35 | 23.5 | 3.2 | 10.5 | 6.5 | 400 | 27kg |
| WCJB-7 | 120-150 | 74 | 23.5 | 23.5 | 42 | 28.5 | 3.3 | 13.5 | 7.5 | 200 | 28.5kg |
| WCJB-8 | 150-185 | 73.5 | 25 | 25 | 41 | 27 | 3.5 | 13.5 | 8.5 | 200 | 31kg |
| WCJB-9 | 185-240 | 76 | 25 | 25.5 | 42 | 28 | 3.7 | 13.5 | 9 | 100 | 17kg |
| WCJB-10 | 240-300 | 80 | 26 | 26 | 44 | 30 | 4 | 13.5 | 10.5 | 100 | 20kg |
Precision-manufactured from high-purity copper, this clamp delivers exceptional electrical performance combined with superior mechanical strength, making it ideal for critical power line connections subject to high current loads and environmental stress. Available in sizes ranging from WCJB-1 (16-25 mm²) to WCJB-10 (185-240 mm²), it accommodates diverse conductor sizes while maintaining consistent connection quality. Its nickel-plated finish enhances corrosion resistance, ensuring long-term reliability in even the harshest outdoor environments.
Machined from T2 red copper (99.9% pure), the WCJB clamp achieves outstanding electrical conductivity of ≥97% IACS, minimizing power loss at connection points. The copper material’s malleability allows for secure gripping of conductors while maintaining structural integrity under thermal cycling.
A tin-plated surface finish (5-10 µm thickness) protects against atmospheric corrosion, tarnishing, and oxidation, critical for outdoor installations exposed to rain, humidity, and industrial pollutants. The plating also reduces contact resistance by providing a uniform, low-oxide interface between clamped surfaces.
The clamp features a bolted design with precision-machined components that ensure uniform pressure distribution across the conductor surface. Its robust construction provides tensile strength exceeding 200 MPa, withstanding mechanical stresses from wind-induced conductor movement and thermal expansion/contraction.
In high-voltage transmission networks (11kV to 220kV), the WCJB Copper Plum Clamp is used for connecting jumper cables, repairing conductor breaks, and joining different conductor sections. Its high current capacity makes it suitable for main transmission lines carrying bulk power.
Within electrical substations, these clamps provide reliable connections between busbars, transformer leads, and outgoing feeders. Their compact design allows for installation in congested substation environments while maintaining proper clearance distances.
Heavy industrial facilities with dedicated power feeders utilize WCJB clamps for connecting service entrances to internal distribution systems. The clamps’ high conductivity supports the large current demands of industrial machinery and processes.
The clamps are designed for use with solid and stranded copper conductors, as well as copper-clad aluminum conductors within the specified cross-sectional ranges. They accommodate both circular and sector-shaped conductors commonly used in power transmission.
Installation involves cleaning conductor surfaces, positioning the clamp around the conductor joint, and tightening the bolts to the specified torque (15-40 Nm depending on size). Proper surface preparation is critical—conductors should be free of oxide, dirt, and corrosion before clamping.
Annual visual inspections are recommended to check for loose bolts, corrosion, or overheating signs (discoloration). Torque verification should be performed every 3-5 years. The tin plating typically provides 15-20 years of corrosion protection in normal environments before requiring reconditioning.
Yes, the clamps meet GB/T 14315 (Chinese standard for cable lugs) and are compatible with IEC 61238-1 requirements for power connectors. They are also RoHS-compliant, ensuring they contain no hazardous substances that could impact environmental or human health.
| Item No. | Conductor | L | L1 | L2 | A | A1 | b | φ | R | Package pcs | Gross Weight |
| WCJB-1 | 16-25 | 39.5 | - | 13 | 25 | 16.5 | 2.8 | 8.8 | 3.5 | 1000 | 18kg |
WCJB-2 | 25-35 | 45 | 13 | 13 | 22 | 18 | 2.8 | 8.5 | 3.5 | 1000 | 18kg |
| WCJB-3 | 35-50 | 52.5 | 13.5 | 13.5 | 24.5 | 21 | 2.9 | 10.5 | 4 | 800 | 24kg |
| WCJB-4 | 50-70 | 57 | 16 | 16 | 27.5 | 22 | 3 | 10.5 | 5 | 600 | 25kg |
| WCJB-5 | 70-95 | 61 | 19 | 19 | 31 | 23 | 3 | 10.5 | 5.5 | 400 | 25.5kg |
| WCJB-6 | 95-120 | 69 | 20 | 20 | 35 | 23.5 | 3.2 | 10.5 | 6.5 | 400 | 27kg |
| WCJB-7 | 120-150 | 74 | 23.5 | 23.5 | 42 | 28.5 | 3.3 | 13.5 | 7.5 | 200 | 28.5kg |
| WCJB-8 | 150-185 | 73.5 | 25 | 25 | 41 | 27 | 3.5 | 13.5 | 8.5 | 200 | 31kg |
| WCJB-9 | 185-240 | 76 | 25 | 25.5 | 42 | 28 | 3.7 | 13.5 | 9 | 100 | 17kg |
| WCJB-10 | 240-300 | 80 | 26 | 26 | 44 | 30 | 4 | 13.5 | 10.5 | 100 | 20kg |
