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33% OFF 4000W 220V AC SCR Voltage Regulator Dimmer Electric Motor Speed Controller US$9.99 US$14.99 View It

Overall:

Bricola 27/08/2017

Good point, this module has a 5x20mm 20A/220VAC Fast blow fuse at the output way. Might have been better to have it at the input way, but it's better than nothing. Notice that terminals 1 and 4 are short circuited on the board (see picture). You might then prefer to connect the same type N (neutral) or L (live) on terminals 1 and 4. Notice too that the main 220VAC (L or N depending of your terminal connection) is present at the potentiometer (not its body of course) and board is quite near of the metallic enclosure. Isolation would be a plus especially when it's used at high power. Knob is a bit to big, so it's difficult to well see the graduation scale. They have put the graduation sticker on the blue plastic protection, so you have to remove it and put it back once you have take this blue plastic protection off. Anyways, this is a nice little 220VAC power voltage regulator. I did not check it up to 4000W, but was working with a 100W motor without problems.

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Technicsau Thementioning of the fuse on the output is wrong, it should be on input,also the identification of N and L is incorrect, The fuse should be on the L input line pin 3 and the pins 1 and 4 are the Neutral line,commoned Pin 2 is the output. I have used this same circuit for years and know all the 'tricks' excellent design and very reliable,just in a nice case this time.
Jv Technics au
Reply 19/07/2021

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