Single to 3 phase converter

HomeCert ltd · Jan 19, 2018

Hi All,

I'm after a little help/advise from anyone who has any knownledge or experience in a single to 3-phase inverters.

My scenario:
We're in the final process of finishing a care home rewire, they have a 3-phase lift being installed. Everything's in place and been ran etc...

UK power networks has just given the owner a quote of over 100k to upgrade the current supply to a 3-phase supply to accommodate the 3-phase lift.

Has anyone ever fitted a 3-phase inverter? The installation currently has a 100amp supply but the loading is minimal. The lift is 31.7amps (37.8amps start up). Can I supply a 3-phase inverter with a 6mm 40amp MCB from my single phase and then supply the lift that way.

Has anyone ever installed one before? Recommendations or advise is much appreciated.

Deleted member 105166 · Jan 20, 2018

How often will it be used? Is a silenced diesel generator with remote start an option? Probably £85k cheaper than what the DNO have quoted and possibly cheaper ongoing.

westward10 · Jan 20, 2018

It is correct that a lift for general use could be incorporated into an escape plan in an emergency situation after a risk assessment and a controlled strategic plan but generally this would be considered a high risk policy. Lifts which have been put in place as part of an escape route are subject to strict legal requirements and are generally only considered where vertical footfall is not free flowing such as a hospital where mobility may be restricted.

Strima · Jan 20, 2018

DC motor with battery back up?

Chris1234 · Jan 21, 2018

The motor is rated at under 12kW.
You can use a 1ph - 3ph VFD to control just a 3ph motor. The existing controls would be wired to the VFD controls, fairly simple if you understand the way the lift works and safety requirements etc.
But will the lift company want/know how to redesign their lift for a one off project?
No.