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4000W 220V AC SCR Voltage Regulator Dimmer Electric Motor Speed Controller 71% OFF 4000W 220V AC SCR Voltage Regulator Dimmer Electric Motor Speed Controller US$4.40 US$14.99 View It
  • Overall:
Top Positive Review for %s on Banggood, Shop best %s with lowest price on Banggood. Browse most helpful positive review for %s before you buy., rc toys, fun sports, fashion, popular electronics
kotopuz 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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