HOW IT WORKS.

By using a modern INVERTER DRIVE it is possible to take a single phase supply and run a three phase motor quite normally but with the added advantages that these modern drives provide.

The inverter takes power from your single phase source and creates a pool of energy which is then synthesised into three outputs which are synchronised to make a three phase supply. It can be programmed to give different speeds from a crawl to double normal speeds. Conventional ‘Direct On Line’ systems can only rotate at one speed related to the 50Hz supply and often need a Soft Start to reduce start-up surges.

The inverter can provide this soft start facility, taking only moments to set up.

HOW EASY IS IT TO FIT?

Any competent person with electrical knowledge could fit them, but if employees have to use the equipment, it is always best to have your NICEIC qualified electrician do the work and they will be able to issue an installation certificate.

For instance, a 2.2kW (3HP) is not much bigger than a pint beer mug and has six terminals, all clearly marked for easy wiring.

A simple optional extra will allow variable remote speed control.

ARE THERE ANY SNAGS?

You need to check the rating of your single-phase supply. A 100A, 230v supply could run up to 20HP total. Your electrician will advise on this.

Small power motors can usually be connected for 240v mode and these will work directly from an ‘off the shelf’ inverter. Old 415v motors may not be suitable for direct connection to an inverter drive. We can advise on a suitable step up transformer or a line reactor to adapt your machine to the inverter chosen.

SUMMARY.

Good where medium power is required and full 3-phase installation makes no economic sense.

Speed Control from crawl to over twice rated speed.

Soft Start.

Forward or reverse easily.

Easy to install

Easy to operate.

Many extra features available.