(800) 853-2651
SHOP NOW

Tractor/Generator size

90 horsepower IF you want to make 45,000 watts. A 15 horsepower tractor will also run it if only needing 7500 watts.
 
Depends on how big of a load you're starting all at once too. My alternator is 15KW constant/25KW intermittent. It will start a 10HP centrifugal blower, which starts HARD. JD 2520D does it handily. JD 4020D on 1000 PO shaft throttled back to achieve 540 RPM won't do it. AC WD45 won't do it.
 
I was told 2hp/kw @ max load. Have no evidence to prove or disprove other than my 15kw doesn't work a 50hp tractor at all. Only burps it a little when you flip the switch. Also, at the in laws dairy, I think they had a 45kw and it put a good load on a 6220 when they were milking. Usually put a bigger tractor on it when available.
 
45kVA output of the generator, figure 75 % efficient, requires 45/.75=60 kVA load on power source. At 746w/hp, 60/.746 = 80 hp input at the shaft at max rated output. Half load would be 40 hp. Probably enough kinetic energy in the system to handle starting surges of 10% or so.

Course watts are VA at a power factor of 1...voltage and current in phase, like a resistive load. So, as the generator's load becomes more inductive running uncompensated heavy starting/running motors, the PF would drop and that would skew the drive requirement.

Part of my house in on a Generac Standby gen of 11kw rating. Engine for that gen is 530cc 18 hp @ 3600 rpm rating. With that ratio, for 45 kva would require 45/11 = 4 x 18 hp = 73.6. Looks like my "guesstimate" of 80 is where it is.

HTH,
Mark
 
You must log in or register to reply here.

Similar threads

G
Is plow sizes determined by tire width?
Replies
6
Views
903
caterpillar guy
C
M
Tractor size for square baling?
2 3
Replies
48
Views
2K
Northvale PA
N
R
Implement attachment
Replies
13
Views
843
Mad Farmer
M
T
Cletrac GG wheel/tire size
Replies
4
Views
203
T.R.K.
T
M
marvel and zenith carbs
Replies
10
Views
414
Blackhole49
Blackhole49
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top