A full load test run of our old DDC. This is a four hour full load test to burn off old fuel and stress the engine to ensure it performs under building load during a power outage. We have to do it every three years.
Thanks for showing! Not many good videos on Detroits running at a good steady rpms like this. Everyone seems to want to just rev them low/ high. They really start sounding good above the 1400 rpm mark.
I literally do. There's a nice 16V149 1.25 miles away driving a refrigeration plant (I'm one of the many mechanics) and I can feel the Detroit roaring through the floor.
the three resistor banks!!! all the resistors turned red .because three wires are connected to each bank i think each is three phase. they have a fan to dissipate this quantity of heat.
That engine is around 450 hp mark in automotive use. 746 watts per hp minus power factor, fan and the fact that's it's running to 1850 for 60 hz and not 2100. The extra 50 rpms is to account for "governor droop" any mechanical governed engine will loose this under any reasonable load. That engine's doing good to keep up to that kind of load and only drop a few hz. I'm a RU-vid "know it nothing" but with a power factor of 80 percent, I'm guessing, that should be producing about 290 "real" hp to accomplish this. I'm glad to see heaters being used to load test. Nothing (well really a lot of things) erks me more that watching someone work on a (small engine) generator and test it with an electric drill! Heaters or incandescent light bulbs are the only easy way to test power output.
@@myselfremade the DDEC3 engines with electronic control and adj inj timing were very fuel effieient,yeah they pull hard hence fuel useage but at least they burn it not smoke it
@@car2069 I knew a guy that put one in a 9K series GMC, double turbo and 730 horses to the ground. Straight pipes that'd make your heart hurt it sounded so good.
@@car2069 we had a V12 DD generator that all the maintenance guys were scared of, we test ran them monthly and so on. Anyway we fired it up one day and off she ran, full tilt from a stuck rack, you ever seen a guy try to run through a wall ? 😂 I pulled the flapper and shut her down, they me A vid BTW thanks 👍🇺🇸
Looks like you were way below 60 hz @ 90% load, is that acceptable? I know some hardware (computers, routers, switches, etc.) might not like the frequency variations. When I load up my home backup genset, the UPS picks up the frequency variations & kicks over to battery.
Thing fell off a cliff. Running below 60hz. You either have major engine issues or, could just be that the governor or rack isn't set right, or you got that thing way overloaded. But judging by the amps she's not overloaded. So technically this genset failed the load test
sure... with 40kw of building load and the occasional surge to start an elevator it works fine in practice so it gets pencil whipped. This was filmed 8 years ago and she's still rockin.
@@car2069 40kw ain't even enough to keep thst girl from wet stacking. But that's awesome she's still in service. I think we need another cold start video👌🏻
looks like a little wet stacking coming from a partially leaky manifold gasket. it will burn off and clean itself out that's probably why theyre doing that 4 hour load bank to clean her out real well and run some fresh fuel through it as well
Keep in mind that the prime mover will more power than the generative capacity to handle load fluctuations... If I recall 12v71tt can be in the range of 550hp@2100 rpm but depends on the models particulars really.
The NAs (Detroit parlance for Naturally Aspirated means it still has blower[s] but no turbo) rates the 12/71 at ~350 for automotive use. The Turbo ones started at about 375hp up to about 435hp depending on application - again for automotive use. The marine series were rated higher again like 525hp for the turbo variants. I suspect that for power generation there were different ratings. There are so many variations it is difficult to know just by looking, however each unit has a placard stating what it is. Without that, generalizations are only possible. Remember that in automotive use the NAs lose power with temperature and elevation(or both) so even though the turbo variants are only 25-75hp higher they have the advantage of maintaining rated power in hot and high conditions which is a huge advantage on a hot day at 5000' for example.
