Hey David,
I assume that you received a VFD for single-phase input and for the 200 V voltage class. Furthermore I assume that you are in North America which would mean you probably have Split-phase electricity, which means 120 V between one hot and neutral, and 240 V between two hots of different phases. Therefore you have to connect the both inputs L1 and N of your VFD to two hots of your wall box, and ground to ground. Note that you do not connect anything to your neutral, I repeat nothing, since you want to use your 240 V and not your 120 V.
As for identifying the wire colors, here you see the international colcors and those common in North America:
– Source: Electrical wiring # Colour coding of wiring by region – Wikipedia
Okay when we lookup in the table above, so in the USA:
Black is Hot (Phase 1)
Red is Hot (Phase 2)
White is Neutral, and
Green is Ground.
So what you want here, is to connect a single-phase VFD to a single phase 240 V power source which you find on your two hots of different phases. Therefore you wire your
Black (Hot1) ----> L1 on VFD,
Red (Hot2) ----> N on VFD (sic!),
White (Neutral) to nothing (important, since you don’t want any 120 V here), and finally
Ground ----> Ground on VFD/EMI filter.
Selecting wire and fuse size
Now for choosing the wire strength. The wire is always dimensionated according to the current. If you want to know what current your VFD will draw, you take a look at the VFDs nameplate, and look into the VFD manual (PDF):
Image 1: Nameplate of the Hitachi VFD model S1-00130SFE: 24 A input in normal duty (ND) mode.
Image 2: Excerpt from the Hitachi S1 manual: For model S1-00130SFE: 24 A input in normal duty (ND) mode.
If you think, why is that so high, note that if you have a VFD with single phase input (which is necessarily the case here if you have Split-phase electricity), then all the power has to be provided over the single phase, which means it draws more than double the current on one input wire than it would if you had a VFD which receives power over a three-phase input. Therefore usually you would always prefer a VFD for three-phase electricity (that’s what is common here in Europe), since you would not need such thick wires and such a strong fuse, but unfortunatly three-phase electricity is rare in North America.
Now for wire and fuse size. I noticed you don’t have a table for the wire sizes in your VFD manual. But you can take the table I provided above in this thread (search for 200 V class, Single phase input, CT mode, 2.2 kW motor output):
So for your 2.2 kW 200 V class VFD with single input, which draws up to 24 A (=5.7 kVA) input in normal duty (ND) mode (as shown from your VFD manual and on your VFD nameplate), you would need a three-wire (2+PE) 10 AWG cable.
I don’t know what is shown on youtube but you need a three-wire (2+PE) 10 AWG cable as described above.
I don’t know if you want to connect your VFD installation directly to your wall box or to a plug, but in the latter case the correct plug/socket would be NEMA 6-30 or NEMA 14-30 in the USA.
How to attach the EMI filter and the VFD to the power is already answered above.
Well if the mounting holes of the EMI filter and of the VFD don’t align, then Mechatron probably went out of Hitachi WJ200 and Omron MX2 (which exactly match to be mounted on top of the EMI filter). At the time I bought my spindle, they sold the Omron MX2 with it, but due to the worldwide suppliers problem, many VFDs ceased to be available. But that does not matter, you don’t forcibly have to mount the VFD on top of the EMI filter, you secure both the EMI filter and the VFD to the mounting plate of your control cabinet side by side, as Mechatron does too by the way, as shown here:
Regarding the shielded spindle cable, its shield should be clamped to ground (see picture below) or grounded with a grounding cable gland.
Where the four wires have to go should be clear:
1)
The four wires of your shielded spindle cable go to U,V,W and PE (⏚, ground) of your VFD, and the shield of the shielded spindle cable should be clamped to ground (see picture) or grounded with a grounding cable gland.
You should have one central grounding point, which usually is on the mounting plate of your control cabinet. You attach both, the VFD and the EMI filter, on this mounting plate, and the shield of the spindle cable somewhere onto this mounting plate too, near to the VFD. See the image below.
Don’t you have access to the shielding of the spindle cable? As I make my own cables, I don’t know how the cables Mechatron manufactures exactly look like. Can you provide a photo of the end that goes toward VFD?
No, it doesn’t matter.
To connect your Hitachi S1 VFD to the Onefinity CNC Controller, you just need to connect
The RS-485 port on your VFD is located here:
– Source: Hitachi S1 Series Basic Guide (PDF)
The connections you listed are some digital and analog control lines witch which you can control the VFD in case your CNC controller has no RS-485 / ModBus interface, e.g. as with Masso controllers. But if your CNC controller has a RS-485 / ModBus interface (which is the case with Buildbotics and Onefinity controllers), you need nothing else to let it control the VFD than these two wires. The Onefinity Controller will also stop the spindle over RS-485/ModBus when entering “estopped” mode.
Another topic would be automatic dust collector and coolant pump switching, which I tried to summarize here