jack cap Posted June 21, 2010 Report Posted June 21, 2010 Varo R153 Rectifier? (7803 - wk 3 1978?)Hi There, I wonder if anyone could please help me identify the above component (and a possible source)? It is part of a Woods Ultracon U-100Motor scr cotroller and is the first component across line and neutral (240VAC) after the switch.The device is press fitted into a heatsink and has 3 blade terminals on an insulated post. Line and neutral are across two (with a dead short between them - hence the reason it is tripping the 16amp CB.) The third terminal goes to F2 (Motor field coil) and another point in the unit. Using a multimeter, there is a diode drop from the third terminal to line and also to neutral.A datasheet would be perfect but any information would be appreciated. best regards JAck Quote
Hero999 Posted June 21, 2010 Report Posted June 21, 2010 Can you post picture?I doubt you'll be able to find an exact replacement.It seems odd that it goes from L to N unless it's a bridge but it can't be otherwise it'd have four wires. Quote
jack cap Posted June 22, 2010 Author Report Posted June 22, 2010 Thanks for your reply. I have two pictures I have attached. I plan to sketch a circuit diagram this week which I will post.The Aluminum heatsink is not taken to earth but a wire from the block it bolts onto goes to two other points in the system. regards. Jack Quote
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