Description: MODEL WD-202 Model WD-202 synchronous digital controller is compact, user-friendly; a low cost controller with in-built power module for up to 415 V/ 90AAC spot welding machines. Features: easy to read thumbwheel switches for setting number of welding cycles; timings set in terms of half cycles of mains supply frequency to get better resolution; precise time and energy control ensures consistent weld quality; and built-in compensation against fluctuations in the mains supply voltage. Specifications: input supply - 230/415 V AC, 50 Hz/60 Hz; output - built-in back-to-back thyristors drive transformers up to 90a primary current; weld time: 0-99 cycles (half cycles of input supply frequency); weld energy - 0-100% adjustable by potentiometer (corresponding to firing angle of 170° to 30°); trigger - external, normally open contact; actuates at contact closure; trigger delay - 0.1 - 3.0 sec (adjustable by potentiometer); indicators - mains on, weld; and dimensions - 100 (W) x 192 (H) x 300 mm (D) (standard DIN enclosure). Model WD-202 synchronous digital controller is offered by Asiatic Welders who offers a range of welding machines and controllers.
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