Test to check Droop

[epitts]

I ran a small load test to check the droop. I set the gen to 62 Hz and plugged in two heaters and 1000 watt light. The volts stayed at about 122 volts but the Hz drooped to 58.3. Does this seem right, see video.

[media]http://www.youtube.com/watch?v=hHrbwjzz3lk&feature=youtu.be[/media]


Thanks

 

[ETN550]

Check the manual but I think that is too much. 3% or 1.8Hz drop with a full 100% step load from 0% to 100% is a typical spec and not always easy to achieve, I might add. I would settle for 4%. That set is around 6%. I don't know how these 002A's are set up but most of the mil spec non civilian units i have come across have some adjustments to tighten it up. You will need a known combination of loads to get to 5kw. It does not make a difference if it is gradually loaded or step loaded the final result will be the same. I have had to totally reset lots of the smaller units going step by step through the book. It seems many like to turn a screw here or there to solve one particular problem then the whole system gets out of whack. amazing how good they can run with a full tune up.

For those that have asteady load a speed adjustment once settled in is often good enough.

BTW whats with the gages fluttering and near off scale? Nice unit, though. I like the ones on the trailers, very versitile.

 

[Neophyte]

I ran an electric chainsaw off an Mep 002a....saw about the same.

Hey, nice power panel!!! Details?

 

[Triple Jim]

You might be able to increase the governor sensitivity. The manual tells how, and says to increase it until it doesn't quite hunt. It's in the technical manual, page 7.1.

 

[epitts]

My Hz meter works some times and then not, not sure if the % load works. The test showed around 30% load but did jump around. I read in the TM about how to adjust the Droop but it did not seem to change the droop. It did limit the amount throttle travel. Here is the thread on the panel
http://www.steelsoldiers.com/auxiliary-equipment/94998-auxiliary-panel-question.html

 

[pahunter]

I checked and adjusted the droop on my 002 the other day to try and eliminate a little speed fluctuation at no load. I believe the manual said there should be a 1 1/2 hz droop from 0 load to 100% load. That is exactly what mine was set for. I adjusted it for less sensitivity by raising the spring(i forget what that spring is called) and the droop went up to about 2 1/2 hz and there was still a little fluctuation(1/2hz) in speed(no load) so I put it back to the way it was. The speed steadies out under load so I'm guessing its normal.

 

[derf]

That is why they have a throttle adjust knob and frequency meter.

 

[pahunter]

It did limit the amount throttle travel.
http://www.steelsoldiers.com/auxiliary-equipment/94998-auxiliary-panel-question.html

I believe if it does that you may have adjusted it the wrong way. If you raise the end of the spring that is toward the injection pump it will droop more, become less sensitive and limit the top speed.

 

[epitts]

That is why they have a throttle adjust knob and frequency meter.

If I increase the throttle to cover the droop, then when the load drops off the Hz jump to about 65 Hz. If I could get it down to 2 hz droop, I would be happy.

 

[derf]

Did you adjust the governor per the TM?

(3) Sensitivity Adjustment. Adjust governor sensitivity
(no load to full load speed droop) by turning the sensitivity adjusting
ratchet (16) counterclockwise (lower spring) for more
sensitivity (less speed droop when full load is applied) or
clockwise (raise spring) for less sensitivity (more speed droop
when full load is applied). If the governor is too sensitive, a
rapid hunting condition occurs (alternate increasing and
decreasing of speed). Adjust for maximum sensitivity without
hunting.

 

[epitts]

Did you adjust the governor per the TM?

Yes I did but will go through the process again. The star wheel seems to move with ease. It did not seem to change the droop much but it did change how much throttle travel you can get. At one point I could not get over 60 Hz with the throttle. So I turned it back the other way. It never did seem to hunt at any time. Governor seems to move freely. I did have the lever off when rebuilding the IP, am wondering if the lever needs to be moved back in the slot more.

Thanks