Union Pacific’s ES44AC are labeled as C45ACCTE. What does ACCTE stand for?

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Good Day,
Union Pacific’s ES44AC are labeled as C45ACCTE. What does ACCTE stand for?
And what do these features do?
Regards,
Swafford

 

Bob5446

New Member
C = Six Axles
45 = Horsepower designation, i.e., 4500 H.P.
AC = Alternating Current
CTE = Unit is equipped with a feature called Controlled Tractive Effort
 

RailroadJeep

The Herder Himself
IIRC, UP is using the 45 designation for the Evo's because some or all of the AC4400CW's are classed C44ACCTE. Hence, the 4400 HP Evo is classed as a C45ACCTE instead of being put in the same group with the AC4400's.
 

Jon Bentz

New Member
It's getting so you need a decoder ring to figure out UP's model designations. Thanks for the translation.
 

pedrop

A Railfan in Brazil
During my trip to USA last month I found some AC45CCTE. Here is one leading a freight train at Truckee NV.
 

Abilene Ks Railfan

Active Member
It's getting so you need a decoder ring to figure out UP's model designations. Thanks for the translation.
At least on the EMD's they are designated by the actual EMD model designation

I sure wish they would drop the CTE off the GE designations,and simply call them ES44(or 45)AC's
 

5thGenRR

New Member
IIRC, UP is using the 45 designation for the Evo's because some or all of the AC4400CW's are classed C44ACCTE. Hence, the 4400 HP Evo is classed as a C45ACCTE instead of being put in the same group with the AC4400's.
The actual reason per Erie PA GE people is that the engine makes a total of 4500HP but they (GE) says they give 100HP to run the auxilliary. And they do. When we load test them they make 4500HP. So in reality UP is correct but obviously UP should go by the GE model number.
 
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RailroadJeep

The Herder Himself
The actual reason per Erie PA GE people is that the engine makes a total of 4500HP but they (GE) says they give 100HP to run the auxilliary. And they do. When we load test them they make 4500HP. So in reality UP is correct but obviously UP should go by the GE model number.
By GE's theroy, the AC4400 would also be a C45ACCTE. I too have load tested engines (I was orignally in mechanical...), and seen the gross HP in N8 on a -9 or AC4400 reach 4480~4500 HP. Like you said, the engine is rated for 4500 HP, but loses 100 HP for the auxillary load, making the total available traction HP 4400.
 

5thGenRR

New Member
By GE's theroy, the AC4400 would also be a C45ACCTE. I too have load tested engines (I was orignally in mechanical...), and seen the gross HP in N8 on a -9 or AC4400 reach 4480~4500 HP. Like you said, the engine is rated for 4500 HP, but loses 100 HP for the auxillary load, making the total available traction HP 4400.
Some of the older 4400's also make 4390, even per the blue card. But that's splittin hairs.
 

RailroadJeep

The Herder Himself
Some of the older 4400's also make 4390, even per the blue card. But that's splittin hairs.
I had a -9 a few weeks back that was smoking like a steam engine, when I began looking around, the computer said it was rated at 450 hp. Needless to say, it had some issues!
 

5thGenRR

New Member
I had a -9 a few weeks back that was smoking like a steam engine, when I began looking around, the computer said it was rated at 450 hp. Needless to say, it had some issues!
D'oh. Thats never good. I have noticed -8 & -9's coming in with busted high pres fuel pumps & when I set the rod height when changing the pumps out the rods hsve been too high and over stroking the pumps. Not that I am saying that was the problem. It was just Chris' random thought of the day.
 

RailroadJeep

The Herder Himself
They decided to tag n' drag it to Havre, the GE shop, so I dunno what was ultimatley wrong with it. But if I had to make a guess, there was ALOT of water in the sight glass... the fuel sight glass. The usually red fuel was milky red/white... :eek:
 




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