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15-10-2017 #1
I've just bought a generic 3.0Kw spindle and VFD off Amazon and the first thing I noticed when unpacking it is that there is no CE mark on either the VFD or in the documentation, I though all electronic devices sold within the EU had to carry the CE mark to show compliance with EU safety standards?
Secondly, and more worrying is that the "Earth" terminal in the VFD is only connected to the backplane of the PCB it's mounted on, there is no protective earth connection to the large exposed aluminium heatsink on the back of the unit, meaning that this could potentially carry 240v if there was a fault in the unit, without tripping the breaker.
I'm intending to take this up with the seller, but I don't suppose I'll get much of a response. I will also to notify Amazon that they are carrying non compliant and potentially lethal electrical goods and hopefully they will delist them, question is are all Chinese VFD's like this?
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15-10-2017 #2
Link.
Price.
Brand.
Without the above it's impossible to know if we should be surprised or not.
- NickYou think that's too expensive? You're not a Model Engineer are you? :D
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15-10-2017 #3
Jeff
I would say yes , its the norm
Going by the photos in various Chinese 6040 router threads
earthing is an after thought at best as they work without an earth , don't they !!!
it would appear the routers normally have the mains earth to the control box fastened to a painted metal surface !!!
the 220V 3 phase VFD output wired to a chassis mounting plug !!! not a socket
with no earth wire connected to the water cooled spindle motor
so I will expect there will be enough leakage current to the spindle motor and the rest of the machine to be felt when touched
I guess the lack of any earth wiring to the rest of the machine avoids earth loops in the signal wiring to and from the breakout board
I have a 4 ft LED light that I added an earth to the metal case
the upside is the 36W LED is brighter than the 2 x 36W florescent light it replaced
I have also rewired the mini-lathe I have as the push on connectors used was made from brass that was too thin to maintain good contact pressure
JohnLast edited by john swift; 15-10-2017 at 11:17 PM.
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16-10-2017 #4
Here is a link to the unit in question
https://www.amazon.co.uk/Happybuy-Sp...s=happybuy+3.0
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16-10-2017 #5
If you click the sellers name on the line
"Dispatched from and sold by moretrade."
You get this -
https://www.amazon.co.uk/sp?_encodin...b=&vasStoreID=
Confirming that the items are sold and shipped from Shanghai.
Unless an item states "Fulfilled by Amazon" Amazon is merely the marketplace and you are dealing with the seller, you have clearly chosen to buy a Chinese product shipped from China and now you want to get it "de-listed" because it isn't CE marked and made to EU electrical safety standards?
Wire it up with the appropriate safe mounting, earthing and connections and see if it works, if not you have a legitimate gripe.
- NickYou think that's too expensive? You're not a Model Engineer are you? :D
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16-10-2017 #6
My understanding is that because you are buying directly from China, then it can be imported without a CE mark, but if i were to import it and then sell it from within the EU, i would be breaking the law.
So if you buy it and put it in a CNC router and sell it, and the person who bought it got electrocuted, then you would most likely be prosecuted if it were found that items on the machine were not safe and had no CE.
Last edited by Gary; 16-10-2017 at 12:54 PM.
Visit Us: www.automationshop.co.uk
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16-10-2017 #7
A long time ago, i was buying stepper drivers from IMS in the USA and they had no CE.
Parker, complained and we had a letter requesting further information.
Luckily they were under the low voltage threshold of the LVD and the case was dropped, but if it was not we would most likely have had a large fine and told to stop importing these drivers.Visit Us: www.automationshop.co.uk
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