Here are some * transformer
formulas* that may be useful.

**Options:
- Useful Formulas
- Motor Formulas**

To better understand the following formulas review the rule of transposition in equations.

A multiplier may be removed from one side of an equation by making it a division on the other side, or a division may be removed from one side of an equation by making it a multiplier on the other side.

1.

Voltage and Current: Primary (p) secondary (s)

Power(p) = power (s) or Ep x Ip = Es x Is

A. Ep = Es x Is

IpB. Ip = Es x Is

EpC. Is = Ep x Ip

Es

D. Es = Ep x Ip

Is

2.

Voltage and Turns in Coil:

Voltage (p) x Turns (s) = Voltage (s) x Turns (p)

or Ep x Ts = Es x Ip

A.Ep =Es x Ip

TsB.Ts =Es x Tp

EpC.Tp =Ep x Ts

EsD.Es =Ep x Ts

Tp

3.Amperes and Turns in Coil:

Amperes (p) x Turns (p) = Amperes (s) x Turns (s)

or Ip x Tp = Is x Ts

A.Ip =Is x Ts

TpB.Tp =Is x Ts

IpC.Ts =Ip x Tp

IsD.Is =Ip x Tp

Ts

For more Transformer Information Check out Useful Information.

** Check out these Online
Calculators!**

If there is anything you would like to add or if you have any comments please feel free to email E.T.E.

Design by TC

Information found here was excerpted from
*Electrical motor Controls*

by Rockis & Mazur and *Ugly's Electrical Refernece* by Hart

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