3000W Chinese Gensets Info.

LooseNut wrote:

chrisser wrote:


. . .

One thing I noticed is that, above the engine, there's a loose wire tied up. There's no schematic in the manual.

I'm sorta curious what the wire is for, but I haven't had the time to trace it.

I also noticed the loose wire (blk/wh). I looked at it briefly. My only slightly educated guess at this point is that it will stop the engine if grounded. I did call the number on the front of the owners manual and they were able to send me a wiring diagram by email. Ask for the wiring diagram for the APG3012 if you call. The diagram is a poor jpg copy of a poor pdf file. The schematic drawing is ok, but the writing is not easily decipherable. (I can send it to you if you want.) Also, the schematic does not exactly depict the genset wiring, but it's close (e.g., the loose wire is not shown on the schematic, the schematic shows only one main winding but the alternator appears to have two, and the little module that the oil level switch connects to is shown to have three wires on the schematic but actually has a four wire connection, some day I'm going to figure out what exactly is inside that module). The genset is really pretty generic.

The alternator appears to have two main windings that are paralleled inside the alternator on the terminal block. Therefore, it appears that this unit could be rewired for 240 volt operation.

Mike

Here's some more information on the KingCraft (All Power America) generator:

voltage regulation 120 volts at no load, 121 volts at 2,200 watts
frequency regulation 62 Hz at no load, 59 Hz at 2,200 watts

Here are some pictures of the AC waveform, not great but not too bad, (the only camera I have that can take digital pictures is a Kenwood VC-H1 which takes poor quality pictures), and the schematic such as it is. The generator ran a cheap digital clock just fine, so microwave oven timers should not run fast.

0 Watts


500 Watts


1600 Watts


2200 Watts


APG3012 Schematic


At light loads there is a slight ripple on the waveform which diminishes at higher loads. The waveform departs from a sine wave at heavier loads but should be fine for just about any device. The DC output was really ugly, but that's to be expected.

Mike