EoW March 2013

News Technology

Reliable rod welders from PWM Precision engineered to produce strong, reliable permanent welds on non-ferrous materials, PWM cold pressure welders offer manufacturers a fast, economical method of joining large rod sections up to 30mm (1.181") diameter. Quicker, cleaner, and ‘greener’ than electrical butt-welding, the cold weld process creates a reliable permanent weld stronger than the parent material without sacrificing electrical integrity. PWM’s range of rod welders includes the P1500, P1000 and EP500 models. Designed and built in PWM’s own UK workshops, these robust, heavy-duty machines are energy efficient, low maintenance and easy to operate. The EP500 electro/pneumatic cold welder is one of PWM’s best-selling machines. Dependable and easy to operate, it will weld copper rod 5mm to 12.50mm (0.197" to 0.492") and aluminium rod 5mm to 15mm (0.197" to 0.590"). The compact hydraulic P1000 machine, for copper rod 6mm to 16mm (0.236" to 0.630") and aluminium rod 6mm to 20mm (0.236" to 0.790"), is equipped with quick release dies and an easily adjustable die setting mechanism. Improved testing of power distribution equipment during the installation of cables is provided by the Cropico DO4000 range of high performance, digital milliohm meters now available from Seaward.

▲ ▲ The P1000 hydraulic rod welder

PWM’s top of the range model, the P1500 electro-hydraulic rod welder will weld copper rod from 15mm (0.590") up to 25mm (0.984"); aluminium up to 30mm (1.181"). Power consumption is limited to the hydraulic pump motor, making the P1500 very economical to operate. No set up time is required and the weld cycle takes about four to five minutes, with the weld flash removed automatically on completion. Video demonstrations of the EP500, P1000 and P1500 are available at www. pwmltd.co.uk Most non-ferrous materials, as well as various alloys can be welded. As a specialist manufacturer of cold welding equipment for nearly 30 years, PWM is always happy to provide advice on cold weld techniques and applications. PWM Ltd – UK Website : www.pwmltd.co.uk

DO4000: Power distribution cable integrity

aluminium plus user settable coefficients for other materials. Temperature measurement over the range –50 to +800ºC is also available.

Protection 415V rms is provided at the measurement terminals and push button operation is achieved easily by clearly marked function controls. Direct reading measured values are displayed on a four-digit LCD display. Over range and low battery indication is also provided and warning LEDs illuminate when an open circuit lead condition is detected. The 4000 series can be supplied with long leads to allow for accurate measurement of large blades up to

The portable and rugged instrument features a number of advanced features to test and measure accurately the integrity of switchgear cable joints and other distribution equipment to ensure they are fully maintained and function correctly. These include forward and reverse current measurement with auto averaging, true current zero, long scale length and a selectable measurement range from 40mΩ to 4kΩ with respective resolutions between 10μΩ and 1Ω.

▲ ▲ The Cropico DO4000 from Seaward

and a rechargeable battery option includes a battery pack, docking station and charger.

Within the range, model 4001 also includes temperature compensation, with preset coefficients for copper and

Seaward Group – UK Website : www.seaward.co.uk

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March 2013