Using a 3-phase generator for 1-phase load
Using a 3-phase generator for 1-phase load
(OP)
I have a 3-phase 208 volt emergency generator that I want to use for single phase loads. Is there any problem with running the generator for prolonged periods while only using two of the three legs?
---KenRad
---KenRad






RE: Using a 3-phase generator for 1-phase load
RE: Using a 3-phase generator for 1-phase load
RE: Using a 3-phase generator for 1-phase load
wareagle has the best suggestion—it permits full-capacity-genset loading. If no 120V loads are served, you could also jack that puppy's AVR up to 139V/coil and get 240V ø-ø times three.
For connecting “edison 3-wire” service to a 12-lead stator, see page 6+ of www.marathonelectric.com/generators/BROCHURE/GPN016.pdf In all three cases reduce available power to two-thirds of nameplate.
• DOUBLE-DELTA—SINGLE-PHASE CONNECTION Most typical arrangement.
• LOW ZIG-ZAG—SINGLE-PHASE CONNECTION {Also termed “Le Blanc”} Less voltage balance with respect to neutral, and the fun of making two sets of 4+ wire pigtail wads.
• HIGH-VOLTAGE—SERIES-DELTA CONNECTION {Abandon/tape off “L1” external connection} Fine for 120/240V 3-wire if full neutral current is not needed {<50%.} Makes easier pigtail bolting/taping.