PRO earth cable 3 m 500 A

Using electrolytic copper with a 95 mm2 cross section in the PRO series is the key element that keeps active resistance from rising during high-current welding. At 500 A the current density spreads over an optimal area, so the conductor temperature does not climb sharply and its molecular structure is protected against accelerated oxidation. The physics of this keeps the arc voltage steady, which is critical for constant heat input in the weld. With so much copper mass the cable acts as a passive radiator and holds the current parameters steady even after several hours of continuous work. This technical solution gives full technical backing to your machine and reduces the thermal load on the rectifier bridges. With the PRO series you can be sure that electrical energy reaches the joint instead of being dissipated as useless heat in the cable.

In MMA welding the symmetry of the electrical circuit has a decisive effect on arc stability, in particular with basic and cellulosic electrodes. Our PRO 95 mm2 earth cable, 3 m long, is designed to form a perfect balance with an electrode cable of the same cross section and length. This configuration reduces arc blow, a frequent problem when welding with direct current in the region of 500 A. A minimal voltage drop Delta U of 0.92 V means that functions such as Hot Start and Arc Force work with full precision and support the welder in the most difficult forced positions. This is the SpawLab engineering approach, which allows weld quality that meets the strictest industrial standards. Thanks to Mirror Balance the control electronics of the welder do not have to compensate for an unbalanced circuit, which markedly extends their life and keeps the service protection of the main components.

The H01N2-D chloroprene rubber insulation used in the PRO series is armour designed for the toughest workshop and shipyard conditions. The material is extremely resistant to oils, greases and UV radiation, which keeps the sheath from crumbling and cracking after years of use. The physics of chloroprene insulation gives excellent protection against mechanical abrasion and accidental contact with hot welding spatter at temperatures above 1000 degrees Celsius. The cable stays highly flexible even at sub-zero temperatures, which with such a large cross section is decisive for comfortable handling at the workstation. The solid sheath is also a dielectric barrier that protects the copper core against short circuits to the structure, which raises operator safety. This class of insulation is a deliberate choice by the manufacturer to make energy transfer completely trouble-free in the most aggressive industrial environments.

The PRO cable ends in a heavy earth clamp cast from high-conductivity brass, which sharply improves the efficiency of the earth point. Brass conducts heat far better than copper-plated steel, so there is no risk of burning the surface of the workpiece at 500 A. A strong, stiff clamping spring holds the mechanical connection firmly and prevents side sparking at the earth to workpiece contact. The 95 mm2 cable is joined to the clamp through a thick-walled copper ferrule, which stops the strands working loose under vibration and temperature changes. A solid earth contact protects the welder electronics against faults caused by a sudden loss of circuit continuity, which at such high currents could break down the power transistors. This is a professional solution that raises the standard of work and the reliability of the whole welding system, made for welders who care about detail.