HF Predator mod to parallel
Hello all. First time posting and impressed with the help on this forum. I'm trying to re-wire a HF generator to parallel. I have tried many things I found on this site as well as others and I just...
Forum Discussion
The sole way to utilize 180 degree opposed phases in a 4-wire generator (240 volt) is to use a transformer. 98% efficiency. Changing 3 phase to single phase 240 volts by using a Scott connection (equal 3 phase loading).
Isosynchronization 2 generators requires patience and 2 equal generators and two equal prime movers. Meaning load sharing. Inverter generators utilize 100% electronics to analyze unit loading by MEASURING PRIMARY FIELD CURRENT difference between the two generators of which both generators must be inverter units.
AMPLIFICATION
Balanced phase loading is easy with a transformer, insanely complicated to try and do it electronically.
A Hollywierd commercial maker wanted me to parallel a pair of 20 Kw mobile gensets of different manufacture. Freq droop between the 2 was 4 Hz at a 13 Kw load. No way Jose. The lead lag would produce 101% load on A with B 75% load.
The 3rd governor did the trick on the Ms. Kelley II to establish a paralleling station between the 2 40 Kw gen sets.
For single generator 4-wire output 240 volt generators use a transformer. For older 12 wire reconnectable generators like the Onan 6.5 NH units, follow rewire instrucions off the plate.
What did I miss?
Isosynchronization 2 generators requires patience and 2 equal generators and two equal prime movers. Meaning load sharing. Inverter generators utilize 100% electronics to analyze unit loading by MEASURING PRIMARY FIELD CURRENT difference between the two generators of which both generators must be inverter units.
AMPLIFICATION
Balanced phase loading is easy with a transformer, insanely complicated to try and do it electronically.
A Hollywierd commercial maker wanted me to parallel a pair of 20 Kw mobile gensets of different manufacture. Freq droop between the 2 was 4 Hz at a 13 Kw load. No way Jose. The lead lag would produce 101% load on A with B 75% load.
The 3rd governor did the trick on the Ms. Kelley II to establish a paralleling station between the 2 40 Kw gen sets.
For single generator 4-wire output 240 volt generators use a transformer. For older 12 wire reconnectable generators like the Onan 6.5 NH units, follow rewire instrucions off the plate.
What did I miss?
