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  • 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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  • 17/10/2019

    Good device. Tried that on home appliances with AC motors and all can be regulated well. It has no speed control and on low RPM you not getting enough torque, but for money you pay it's great thing to work with. Tried on hand drill and washing machine motor, both work ok. I can hear some harmonics on low RPM which means that output is not a filtered clear sign ware, but device does it's job. Design of terminals is very clever as screw 2 and 3 are both phase wires. It means chance to have short circuit between two screws (water, metal chips, loosen wire or its parts, dust) is much lower. It's small thing which could be important for long term use. As you can see from picture there is no dedicated ground connection. Temporary I've connected it to available screw on the left of 4 screws used for power in and out. Do not thing that you will be lucky and without ground and some DIY equipment without double insulation. Make a ground connection and use RCB breaker feed power connection, otherwise you may get killed in case of internal electronics failure or dust or water causing phase to tough casing -> then you. RCB will power off in such situation and in most cases you will get only 30ma (industrial set to 200ma). Make sure to use device one you know about safety, double insulation of toolds and appliances, what is RCB breaker, what is Phase and what is Neutral (in US there are two phase wires). Overall I recommend this device as it sustained ~400-500 watt load for 5 minutes without smoke or burning and appear to robust.

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  • 20/02/2019

    Buena presentación y buen funcionamiento, el embalaje pésimo, sólo un sobre de plástico, llegó algo aplastado en las esquinas, pero funciona igual

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  • 09/02/2016

    Заказывал на сайте Banggood впервые.И был приятно удивлен,что товар пришёл до г Ангарска довольно быстро за двадцать дней(во всяком случае меня устраивает)Нареканий никаких нет.Всё хорошо упаковано и пришло в целости и сохранности.Хочу заказать на этом сайте ещё что-нибудь,если всё будет приходить также безупречно,то можно будет смело делать покупки. С уважением Александр.

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  • 04/08/2021

    Sehr gefährliches Design, Metallgehäuse ist zu nah an Elektronik und diese Teile sind alle auf voller Spannung. Nicht in Metallgehäuse verwenden! passen in isolierte Gehäuse .

    Kommentar (3)
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  • 18/04/2016

    Bonjour, Identification Ligne et neutre bien repérés, mais aucune information sur l'entré et la sortie du courant modifié (j'ai peur de griller les circuits en inversant entré et sortie).

    Kommentar (1)
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  • 24/02/2021

    sehr gut

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  • 13/11/2015

    No le doy la máxima puntuación sencillamente por no tener la información en un idioma mas extendido. De los cuatro conexiones existentes las dos de la izquierda son el IN y las dos derecha el OUT...así de sencillo. Por lo demás solo puedo decir que funciona correctamente.

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  • 17/03/2022

    Schneller Versand dank

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  • 17/10/2019

    paquete recibido 16/10/19 todo bien ya en casa saludos

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