Temperature Control Technology Makes Parallel Groove Clamps Operate More Stably.

In actual operation, the temperature rise of connector parallel groove mainly originates from Joule heating generated by contact resistance. When the oxide layer on the conductor surface ruptures under pressure, aluminum electrons can flow between the conductor peaks to form a conductive path. The greater the pressure, the more contact peaks there are, and the lower the contact resistance. Applying conductive grease during construction can prevent oxide layer regeneration, and the copper and silver ions in it will penetrate into the oxide layer, increasing the conductivity of the conductive interface by 0.5%-9% after energized operation.

Different types of groove clamp employ unique temperature control schemes. Bolt-type parallel groove uses flat washers and spring washers to transmit uniform pressure, requiring uniform force when tightening each bolt, with a gripping force on the conductor of approximately 10%-20% of the breaking force. Wedge-type parallel groove clamp connector relies on the instantaneous thrust provided by a special tool for installation; the self-locking structure formed by the wedge and the housing maintains a constant clamping force, with a gripping force reaching 20%-45% of the breaking force. The H-type pg clamp connector generates circumferential compression under the action of hydraulic clamps, causing the aluminum on the inner wall of the pg clamps to undergo plastic deformation and embed into the wire stranding gap, greatly increasing the contact area and the gripping force to reach 40%-65% of the breaking force.