Bolt-clamped Installation Of Parallel Groove Clamps
Choosing the right connector ensures long-term stability in electrical distributions. The parallel groove clamp is a primary solution for connecting aluminum or copper conductors. Its bolted design provides a mechanical advantage that ensures a low-resistance interface and high tensile strength across various wire diameters.
What is a Parallel Groove Clamp?
A parallel groove clamp connector is a mechanical device designed to join two parallel conductors. By tightening the bolts, the clamp applies uniform pressure across the contact surface. This specific bolted installation method allows for easy maintenance and secure conductivity in medium to low voltage overhead lines.
Specifications and Selection
Selecting the correct model involves matching the conductor cross-section to the groove geometry. Proper sizing prevents hot spots and mechanical failure under thermal cycling conditions.
| Component Part | Common Materials | Typical Torque Range |
| Main Body | High-strength Aluminum Alloy | 20 Nm - 45 Nm |
| Fasteners | Hot-dip Galvanized Steel | Grade 8.8 or higher |
| Pressure Pad | Extruded Aluminum | N/A |
Installation Steps for Secure Connections
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Clean the conductors using a wire brush to remove oxidation layers.
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Apply a high-quality conductive grease to the parallel groove area.
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Place the wires into the respective channels of the pg clamp connector.
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Insert the bolts and tighten them manually to ensure the wires are seated.
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Use a calibrated torque wrench to reach the specified tension levels.
Applications of PG Clamps in Infrastructure
The single bolt parallel groove connector is frequently utilized for light-duty branching or grounding tasks. For main transmission lines, multi-bolt pg clamps offer superior grip and surface area. These components facilitate reliable power flow in lightning protection systems and substation jumper connections where vibration resistance is essential.
Performance Advantages of Bolted Designs
The mechanical pressure of pg clamps penetrates the microscopic peaks on the conductor surface. This action creates multiple points of contact, reducing electrical resistance. Furthermore, the robust housing protects the internal connection from environmental corrosion and thermal expansion during peak load periods.
