I need some help. I was all prepped to use the 3-wire cord and outlet this weekend and the Makerspace person told me I really needed to get the 4-wire outlet and cord. Realizing it would be another week otherwise, I went back to HD and bought the cord & outlet. The outlet has been installed and I know which wire is which (2 hot wires: Red& Black, a neutral (white ) & a Ground wire (green). However, I’m having a little problem figuring which screw terminals to wire them into. Actually, the documentation you provided, though helpful, I don’t think correlates with the model I have which is HY01D523B.
One confusing issue I have is with the labeling of the terminals: on the inside the far left terminal appears like the ground symbol, yet the outside label has that terminal labeled as “R” (one of the “hot” wires. Can you confirm which is correct? Though I could be wrong, it appears the outside label (sticker) has the ground symbol as the 4th terminal. Or, is that symbol something else? If the sticker label is incorrect, I may have mis-wired the spindle. Also, will this 2-pole RCD I purchased work with the 4-wire cord? I haven’t seen any tutorials that demonstrate that online.
I’m not familiar with your VFD drive, so will refer to mine, which may address your confusing situation…
It is not wrong to only have 3 wire 240VAC, so long as you are only driving 240 VAC loads with it. You would have Hot, Hot, and Ground wires. If you want to tap into a 120 VAC circuit at the same time, you need the Neutral wire to essentially split the 240 in half. Then you have Hot, Hot, Neutral, and Ground.
I run my 120 VAC separately, so the 240 VAC circuit in my garage that is dedicated to my CNC machine, I only ran a 3 wire 240 VAC circuit. In fact the HY drives only have those three terminals - there is no Neutral wire on an HY VFD drive.
Your VFD may be the same type wiring as mine. If that is the case, I would presume you would wire all four wires from your incoming circuit into your panel, but then only connect your VFD drive to Hot, Hot, Ground.
I will take a picture of my HY VFD wiring when I get home in an hour or so…
Note that on the HY VFD’s (again at least mine) it can accept 3-phase input power. Those three terminals are all next to each other. If you only have a single phase, then you only use two of those terminal for your two Hot wires. I do recall that the Ground terminal was not next to the Hot terminals. (Other end of the terminal strip if I recall.)
@Jay_Polo Thank you, and I’m sure HY would thank you too…I was just about to give them & CNC shop an earfull…what use is the instrument when the terminals aren’t labeled, or worse, are mislabeled. I don’t know how they expect you to wire these up. By trial & error, intuition or revelation. All of the guides and documents are in conflict. It says to get a professional to do the wiring, but I had 2 tell me opposing things before I decided to check back online. Thank goodness for y’all.
@George_Allen Here’s the wiring for my HY VFD. So for the power cord I made up, Black and White are both 240 VAC Hot, and Green is Ground. Then the 3 phase wires leading to the spindle are all three Black wires bundled. missing/deleted image from Google+
@George_Allen I just got a closer look at that sticker on the bottom of your drive. That would suggest your wiring may be different than mine! Can you take a picture of the full terminal strip?
@Jay_Polo Thanks for doing that. Unfortunately, my VFD is a different model and the terminals are not labeled.
The only labeling is for the connectors to the controller. And, if you notice, underneath the first terminal and the last are the ground symbols…different from others’ HY models. missing/deleted image from Google+
Here’s the sticker on the outside. I don’t know what the symbol is in the middle of the sticker… I assumed initially that it was some sort of ground symbol. Most models have a place to connect a brake resistor.
@George_Allen MN shown in the picture below. Also, the sticker on the underside of my drive matches the sticker right above the terminals themselves. missing/deleted image from Google+
@George_Allen Comparing the labels, they state that we have the exact same model VFD. But your labels look a little sketchy compared with mine. I’m not an expert here, and don’t want to cause undue concern, but I’d be a bit concerned that VFD could be a knock off (or at least have sat on a shelf somewhere for quite some time.) Just seems very different for the exact same model number. Some of the postings on eBay actually call out the concern to watch out for knock-offs and then point out differences to look for between them.
Maybe you shoot a picture of the drive to the company and ask them to confirm/deny it is authentic…
On that note, mine is the same as jay’s - I bought direct from HY, not from a reseller.
That isn’t to say you’re screwed, though - the VFD is simply an AC220 single phase 50Hz to AC220 three-phase 0-400Hz transformer. It changes the speed of the spindle by changing the supply frequency. There’s not much to it. Looking at your pic, there are multiple earth symbols on the alloy backplate casting, indicating that the chassis is earthed. Go by the label.
I’m not sure about @Jay_Polo ’s wiring as the colours are wrong - white (in such an implementation) is neutral - you should have black to R and red to T, if you were using conventional wiring, and no neutral.
Also: @Jay_Polo , that grommet is there for a reason - you shouldn’t have your live supply wires hanging by the screw connectors. That’s an accident waiting to happen. There’s no strain relief in that and you are betting friction > gravity. That may be true now, but over time gravity always wins.