Aryan165
Plastic
- Joined
- Apr 24, 2017
- Location
- United Kingdom
Hello all,
I've been reading this forum for years and have also posted before, but I have learnt a lot and found answers to most questions by just finding existing threads. This forum is the best thing on the internet bar none!
I've been researching possible VFD and 3-phase motor options for a while to get a feel for what I can buy when I get my first 3 phase machine, as well as learning about VFD's and 3-phase in general.
I have learnt so far that:
1) single phase input VFD's exist and are built to handle extra input current (1.732 x current theoretically) for a given 3-phase power output.
2) you can use a 3-phase input VFD as long as you derate it by 50% for your desired output, given the VFD doesn't have phase-loss detection or that this can be turned off in the settings.
Living in the UK with a 240V (nominally 230V) single phase service as standard, my options (as I understand so far) for using a VFD to power 3-phase motors off only a single phase supply seem to be:
1)Buy a single phase input 240V VFD, and rewire any machine motor for 240V (if motor happens to be dual voltage), or replace the machine motor with a 240V motor (again, if possible/economical).
2)Buy a 400V (i.e 415V UK) 3-phase input VFD, derate it 50%, and supply with single phase.
The latter would require the single phase voltage to be 400V as I understand it. Please correct me if I'm wrong.
Has anyone done such a thing? Is it even possible to buy such a transformer in the UK (to step up 230V 1-phase to 400V 1-phase to supply 400V VFD)? Would it work?
I've tried every search term I can think of to find such a transformer (230/400V step-up), but all I get are ''site'' transformers designed to step up 110V to 240V for power tool use on building sites, and occasionally 400V to 230V step down transformers for seemingly the same (site) use.
I would appreciate any input form anyone that has powered industrial (400V) machines with VFD from single phase, or has any idea what I could possibly use for this purpose. I am aware of rotary converters, just trying to get an idea if VFD is a viable option for powering 3-phase machines that I might buy (think used factory/school equipment, local ads, auction finds etc).
Thanks
Aryan
I've been reading this forum for years and have also posted before, but I have learnt a lot and found answers to most questions by just finding existing threads. This forum is the best thing on the internet bar none!
I've been researching possible VFD and 3-phase motor options for a while to get a feel for what I can buy when I get my first 3 phase machine, as well as learning about VFD's and 3-phase in general.
I have learnt so far that:
1) single phase input VFD's exist and are built to handle extra input current (1.732 x current theoretically) for a given 3-phase power output.
2) you can use a 3-phase input VFD as long as you derate it by 50% for your desired output, given the VFD doesn't have phase-loss detection or that this can be turned off in the settings.
Living in the UK with a 240V (nominally 230V) single phase service as standard, my options (as I understand so far) for using a VFD to power 3-phase motors off only a single phase supply seem to be:
1)Buy a single phase input 240V VFD, and rewire any machine motor for 240V (if motor happens to be dual voltage), or replace the machine motor with a 240V motor (again, if possible/economical).
2)Buy a 400V (i.e 415V UK) 3-phase input VFD, derate it 50%, and supply with single phase.
The latter would require the single phase voltage to be 400V as I understand it. Please correct me if I'm wrong.
Has anyone done such a thing? Is it even possible to buy such a transformer in the UK (to step up 230V 1-phase to 400V 1-phase to supply 400V VFD)? Would it work?
I've tried every search term I can think of to find such a transformer (230/400V step-up), but all I get are ''site'' transformers designed to step up 110V to 240V for power tool use on building sites, and occasionally 400V to 230V step down transformers for seemingly the same (site) use.
I would appreciate any input form anyone that has powered industrial (400V) machines with VFD from single phase, or has any idea what I could possibly use for this purpose. I am aware of rotary converters, just trying to get an idea if VFD is a viable option for powering 3-phase machines that I might buy (think used factory/school equipment, local ads, auction finds etc).
Thanks
Aryan