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edhanasekar
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Join Date: Mar 2010
Location: Kuwait
Posts: 4

Basic Calculations for Electrical Design

03/05/2010 12:37 PM

Hai 2 all. I'm an electrical draftsman.,i just want to learn the basic technical electrical calculations regarding designing., can any one help to find a Way
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RDGRNR
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Engineering Fields - Instrumentation Engineering - New Member

Join Date: Dec 2009
Location: San Antonio, TX USA
Posts: 844
Good Answers: 29
#1

Re: basics of EEE

03/05/2010 12:57 PM

Take a look at this site. It's basic but I think that's what you asked for.

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Anonymous Poster
#2
In reply to #1

Re: basics of EEE

03/05/2010 1:01 PM

thanks
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Aseer
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Join Date: Oct 2009
Location: Dubai,UAE
Posts: 62
Good Answers: 2
#3

Re: Basic Calculations for Electrical Design

04/12/2010 4:01 AM

Dear, find below few usefull basic formulas for electrical system design.If could you explain me more about your work,I can help you more...cheers

Symbolic:

E =VOLTS ~or~ (V = VOLTS) P =WATTS ~or~ (W = WATTS) R = OHMS ~or~ (R = RESISTANCE) I =AMPERES ~or~ (A = AMPERES) HP = HORSEPOWER PF = POWER FACTOR kW = KILOWATTS kWh = KILOWATT HOUR VA = VOLT-AMPERES kVA = KILOVOLT-AMPERES C = CAPACITANCE EFF = EFFICIENCY (expressed as a decimal)

DIRECT CURRENT
AMPS=WATTS÷VOLTSI = P ÷ EA = W ÷ V
WATTS=VOLTS x AMPSP = E x IW = V x A
VOLTS=WATTS ÷ AMPSE = P ÷ IV = W ÷ A
HORSEPOWER=(V x A x EFF)÷746
EFFICIENCY=(746 x HP)÷(V x A)
AC SINGLE PHASE ~ 1ø
AMPS=WATTS÷(VOLTS x PF)I=P÷(E x PF)A=W÷(V x PF)
WATTS=VOLTS x AMPS x PFP=E x I x PFW=V x A x PF
VOLTS=WATTS÷AMPSE=P÷IV=W÷A
VOLT-AMPS=VOLTS x AMPSVA=E x IVA=V x A
HORSEPOWER=(V x A x EFF x PF)÷746
POWERFACTOR=INPUT WATTS÷(V x A)
EFFICIENCY=(746 x HP)÷(V x A x PF)
AC THREE PHASE ~ 3ø
AMPS=WATTS÷(1.732 x VOLTS x PF)I = P÷(1.732 x E x PF)
WATTS=1.732 x VOLTS x AMPS x PFP = 1.732 x E x I x PF
VOLTS=WATTS÷AMPSE=P÷I
VOLT-AMPS=1.732 x VOLTS x AMPSVA=1.732 x E x I
HORSEPOWER=(1.732 x V x A x EFF x PF)÷746
POWERFACTOR=INPUT WATTS÷(1.732 x V x A)
EFFICIENCY=(746 x HP)÷(1.732 x V x A x PF)
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