Siemens VFD

[Ink Maker]

In our 6x12 three roll mill, we use a Siemens Micromaster 440 VFD. The
input power is 3 phase, 208V, 60 Hz. Can I connect it directly to a
single phase 220V, 60Hz power supply?

Ken

Opportunities are never lost. The other fellow takes those you miss.

| Torrey Hills Technologies, LLC |
| www.threerollmill.com |
| www.torreyhillstech.com |

 

[Robert Baer]

In our 6x12 three roll mill, we use a Siemens Micromaster 440 VFD. The
input power is 3 phase, 208V, 60 Hz. Can I connect it directly to a
single phase 220V, 60Hz power supply?

Ken

No.

 

[mpm]

In our 6x12 three roll mill, we use a Siemens Micromaster 440 VFD. The
input power is 3 phase, 208V, 60 Hz. Can I connect it directly to a
single phase 220V, 60Hz power supply?

Ken

Opportunities are never lost. The other fellow takes those you miss.

| Torrey Hills Technologies, LLC |
|www.threerollmill.com |
|www.torreyhillstech.com |

You cannot generally operate 3-phase equipment on single-phase
service.
You can "fake" the other phases using a phase-maker.
They're noisy electrically, and in my experience prone to long-term
failure, but they do work.
A motor-generator setup can accomplish the same thing.

You might luck out and be able to convert the equipment to 1-phase.
Sometimes, it can be as simple as changing the taps on the equipment's
main power transformer. I am not familar with the equip, so you'll
have to ask someone who is.

Either way, if you can run it on 1-ph, it probably won't be as
efficient, or will require a higher amperage than it would on 3-ph
(which makes sense). I mention it only because there is the
possibility the 1-ph service might not be sized appropriately.

 

[JosephKK]

Ink Maker [email protected] posted to
sci.electronics.design:

In our 6x12 three roll mill, we use a Siemens Micromaster 440 VFD.
The input power is 3 phase, 208V, 60 Hz. Can I connect it directly
to a single phase 220V, 60Hz power supply?

Ken

Opportunities are never lost. The other fellow takes those you
miss.

| Torrey Hills Technologies, LLC |
| www.threerollmill.com |
| www.torreyhillstech.com |

It may work. If it does you should derate the thing to about half
power. Feeding it properly with a phase converter (rotary or
static) is a better way to go.