PRO earth cable 3 m 400 A

Using electrolytic copper with a 50 mm2 cross section in the PRO series is the key element that keeps active resistance from rising during high-current welding. At 400 A the current density spreads over an optimal conductor area, so the cable temperature does not climb sharply even without technological breaks. The physics of this keeps the arc voltage steady, which is critical for constant heat input in the weld and for avoiding spatter. Thanks to the purity of the copper, the cable shows minimal reactance, and that is noticeable in pulsed welding, where the dynamics of the power source have to be passed on without distortion. With the PRO series you can be sure that electrical energy reaches the joint instead of being dissipated as useless heat. This solution gives full technical backing to your machine, reduces the thermal load on the rectifier bridges and extends trouble-free service life.

The H01N2-D insulating sheath made of chloroprene rubber gives the highest level of mechanical and chemical protection in a demanding workshop. The material resists oils and greases and direct contact with hot welding spatter, which keeps the cable in service for a long time. The physical strength of the insulation stops it cracking under UV radiation and ozone, and that matters for keeping the machine electronics protected against short circuits. The sheath stays flexible even at sub-zero temperatures, which makes it easier to handle the equipment at cramped assembly stations without straining the welder's hand. The sheath is self-extinguishing, which raises fire safety at the workplace and stops a flame spreading in case of a fault. This class of insulation keeps the copper core intact by shutting out corrosive agents and moisture from the workshop air.

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 400 A. A strong, stiff clamping spring holds the mechanical connection firmly and prevents side sparking at the earth to workpiece contact, which could ruin the weld face. The 50 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.

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 50 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, called Mirror-Balance, reduces arc blow, a frequent problem when welding with high direct current. A minimal voltage drop Delta U of 1.26 V means that functions such as Hot Start and Arc Force work with full precision and support the welder in difficult positions. This is the SpawLab engineering approach, which allows weld quality that meets strict industrial standards. Thanks to Mirror-Balance the control electronics of the welder do not have to compensate for an unbalanced circuit, and that directly lowers energy use and raises arc stability.