Printable View
Hi guys,
Is the max AMP a spindle will draw distributed along the 3 wires? or per wire?
I ask because I bough a 14/3 wire and it is huge (thick), however I see some folks using and selling a 16/3 VDF Cable which will be much thinner and manageable.
Thank you.
All 3 wires will have 18 amps. However, 16/3 VFD cable exposed to air in open tray has max 18 amp capacity. Chances of running at 18 amps max is probably nill and you can restrict amps by setting 17 amps as max in VFD.
My question is, if my spindle draws 15 amps, it is going to pull 15 amp per each one of those 3 wires, not 5 amps each.
Yes, 15 each.
- - - Updated - - -
What size spindle is this?Quote:
however I see some folks using and selling a 16/3 VDF Cable which will be much thinner and manageable
Yes. 15 amps each wire but thats when you have set program to max out ipm to point where spindle is ready to stall and trip out. You most likely never will do that. you have answered your own question. A 16/3 vfd cable is good for 18 amps. If your spindle is 15 amps max you can use 16/3 not 14/3. Just make sure it's for VFD to Spindle shielded cable.
Quote:
Originally Posted by ger21
Ger thank you for clarifying. This is a 110V 2.2KW. so 20 Amps.Quote:
Originally Posted by nwrepair1
(I looked into a "smaller spindle" but I like to be able to use a ER20 collet compatible cutter (1/2").
With that said, I think I should be good with the 16 gauge at 18 amps. I did not know you could limit the amp draw in the VFD.
2.2kw at 110vac 3 phase is only 11.5 amps. 16 gauge is fine.
a vfd delivering 2.2kw from 120vac single phase (with a dumb rectifier and capacitor input filter) will draw as high as 30 amps rms from your 120vac single phase supply. you will probably never actually run your spindle that hard so you may get by with a 20 amp breaker on a 12 gauge wire.
also these spindles are rated by the input vars, not watts. you may only be drawing a peak of 1800 watts from the outlet which is on the order of 25 amps rms
Most people are using 220V spindles, which are usually rated at 8-10 amps.Quote:
however I see some folks using and selling a 16/3 VDF Cable
Thank you, that makes sense. The 14 gauge VFD cable I have is a monster... I will try the 16 gauge, I should be good.
Does anyone know how to set the current limit on a HY VFD?
It should be PD142.
If you don't have all the settings correct, you could instantly damage your spindle or VFD.
I will look into it. Thank you