3 Phase Generators NZ

Three-phase generators supply the 400 V power that industrial motors, workshop machinery and commercial equipment need. Where single-phase tops out, a three-phase unit delivers smoother, higher-capacity output for demanding loads - and many models also provide single-phase outlets for mixed sites. Generator Shop stocks 7 three-phase generators, including the GT Power GT25000E (18 kW / 22.5 kVA, three-phase and single-phase) for heavy industrial and commercial use. 

What three-phase generators are used for 

Three-phase generators power the gear single-phase can't. Workshops and factories run three-phase lathes, mills, compressors and pumps. Commercial sites and events supply large HVAC, refrigeration and lighting rigs. Farms and orchards drive big irrigation pumps and processing equipment. Construction projects power hoists and site infrastructure. Because units like the GT15000E and GT25000E provide both three- and single-phase outlets, one generator can cover mixed-load sites - motors on three-phase, tools and lighting on single-phase. 

How to choose a three-phase generator 

Get four things right. Confirm you actually need three-phase - check the nameplate voltage of your equipment; a three-phase motor cannot run on single-phase. Output - three-phase kVA is shared across phases, so size to the largest simultaneous load and its start-up surge, which is high for big motors. Phase mix - if you run both motor and general loads, choose a model with single- and three-phase outlets. Start and duty - electric or auto-start and a prime-rated build for long shifts. Given the stakes, talk to our team to size correctly before ordering.

Frequently asked questions

Do I need a three-phase generator?

Only if your equipment is three-phase - check the motor or appliance nameplate for 400 V / three-phase markings. Most homes and hand tools are single-phase and don't need it. Workshops, industrial motors and large commercial gear typically do.

Can a three-phase generator also run single-phase equipment?

Many can. Models like the GT Power GT25000E and GT15000E provide both three-phase and single-phase outlets, so you can run industrial motors and everyday tools or lighting from the same unit. Confirm the single-phase output rating matches your load.

How do I size a three-phase generator?

Add the running loads on all phases, identify the largest motor's start-up surge (often several times its running watts), and size the generator to handle that peak with headroom. Because incorrect sizing risks nuisance trips or motor damage, we recommend confirming the spec with our team.