Click here to make tpub.com your Home Page

Page Title: APPENDIX E. TEST STAND PROCEDURES
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 

TM 9-2920-257-30&P
APPENDIX E
TEST STAND PROCEDURES
GENERAL
E-1.
After repair of the generator it must be bench tested to verify
Follow the procedures below to calibrate test
correct
operation.
s t a n d t a c h o m e t e r , s e t base settings for the test stands, and then
perform tests on the 200 ampere generator/regulator and generator.
E-2.
Military vehicle generators are equipped with various size pulleys,
such as 3-, 3 1/2-, and 4-inch diameter.
T h e 500-ampere test stand
has a 4-inch pulley.
S i n c e the test stand tachometer reads drive head
s p e e d , the tachometer must be calibrated when a generator has a pulley
larger or smaller than 4 inches.
T o calibrate the speed of the
generator use fomula below.
F o r m u l a : a = Test speed of test generator (normally lowest rated
output speed as indicated by specifications).
4 = Diameter of drive pulley on test stand.
b = Value of a x 4.
c = Diameter of pulley on generator to be tested.
e = Value of b divided by c (this value will indicate the
speed of the driven pulley when the test stand speed (a) is at
selected speed).
aX4=
b
=e
c
Example:
To test a generator with a 3-inch pulley, determine lowest
rated speed of generator.
I f rated RPM for a generator is 2,000 RPM
t o 8,000 RPM, select 2,000 RPM as test speed.
Increase test stand speed to 2,000 RPM with vari-drive speed control.
Turn the calibrate pulley control to calibrate position.
E-1

Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business