Trig link 1/30/15

http://www.mathsisfun.com/sine-cosine-tangent.html

Pythagorean theory help

same link as before, but a different lesson. 

http://www.mathwarehouse.com/geometry/triangles/how-to-use-the-pythagorean-theorem.php

Help with trig word problems

I found a link that may prove helpful to those of you having difficulties solving word problems.

http://www.mathwarehouse.com/trigonometry/sohcahtoa-real-world-applications.php

Transformer Proportion Formulas

use these formulas to solve the assignment in class Monday.



FOR DIRECT PROPORTION RATIOS     TURNS and VOLTAGE


N p    =  E p
N s           E s


FOR INVERSE PROPORTION RATIOS  VOLTS and AMPS

E p = I s
Es            I p

Transformer Taps

this is from ACME electric, a transformer manufacturer.

What are taps and when are they used?

Taps are provided on some transformers on the high voltage winding to correct for high or low voltage conditions, and still deliver full rated output voltages at the secondary terminals.
Standard tap arrangements are at 2.5%and 5% of the rated primary voltage for both high and low voltage conditions.
For example, if the transformer has a 480 volt primary and the available line voltage is running at 504 volts, the primary should be connected to the 5% tap above normal in order that the secondary voltage be maintained at the proper rating.
The standard ASA and NEMA designation for taps are “ANFC” (above normal full capacity) and “BNFC” (below normal full capacity).

Motor connection diagram

Blueprint module shop grade

use the image below to determine the number of each type of lighting fixture shown on the reflected ceiling plan.  this work will be collected Monday November 17, 2014.