3000W Chinese Gensets Info.

professor95 wrote:

cloudswrest wrote:
One thing I noticed, and it is not shown in the schematic, is the bottom terminal of the top winding (white wire) is wired to chassis ground in the generator (not in the switch panel.) So neutral on the 120V outlets is shorted to chassis GND.

I hope this is not true and you are looking at a wire for the 12 volt winding or the regulator control winding. Have you made some resistance measurments with an ohm meter to be sure? If it is true, it should be disconnected and allowed to float. Only the green or green/yellow wire should be attached to the chassi. Having the white wire (AKA neutral) on the chassi is a dangerous situation.

Is true. Measured with an ohmmeter as well as saw it visually. For the 120V outlet the GND terminal measures shorted to the neutral terminal. When the generator is on the meter measures 120VAC from Hot to GND (and chassis). I plan to get out there and rewire it when the weather cools off, although the cheesy schematic doesn't show the field cicuitry, only the armature circuit, so I don't yet know if the field circuit relies on the neutral to chassis connection.

Also something that IS shown on the schematic is the "neutral" contact of the 240V twistlock connector is left unconnected. I found this a minor irritation.

I have seen this on 3 prong twist lock outlets (JD built ELM 3000 for example), but not on 4 prong L14-20 or L14-30 outlets. Maybe one of the assemblers goofed and put the white wire that should attach the 220 center tap to the outlet onto the chassi? Wild guess on my part. Anyway, the neutral is not needed on "straight" 220, only when you use an appliance like a stove or dryer that has both 110 and 220 elements. It does come in handy when pulling a 110 leg from the twistlock outlet. In fact, without the neutral leg, you cannot get 110 out of the twist lock outlet - unless some dummy runs the neutral to the chassi ground along with the grounding conductor :E

I don't think it's an assembler goof because the contact is shown floating in the schematic. Of course there is 120 to chassis GND :)

Cloudswrest