      267 Academy Avenue Pittsburgh, PA 15228 Phone: (412) 561-5050 Fax: (412) 561-2242 E-Mail: peco@processengineering.com ## Conversions and Formulas E = Voltage / I = Amps / W = Watts / PF = Power Factor / Eff = Efficiency / HP = Horsepower

 AC/DC Power Formulas To Find Direct Current AC / 1phase 115v or 120v AC / 1phase 208,230, or 240v AC 3 phase All Voltages Amps(when HP is known) HP x 746 E x Eff HP x 746 E x Eff X PF HP x 746 E x Eff x PF HP x 746 1.73 x E x Eff x PF Amps(when Kilowatts is known) kW x 1000 E kW x 1000 E x PF kW x 1000 E x PF kW x 1000 1.73 x E x PF Amps(when kVA is known) kVA x 1000 E kVA x 1000 E kVA x 1000 1.73 x E Kilowatts I x E 1000 I x E x PF 1000 I x E x PF 1000 I x E x 1.73 PF 1000 Kilovolt-Amps (kVA) I x E 1000 I x E 1000 I x E x 1.73 1000 Horsepower (output) I x E x Eff 746 I x E x Eff x PF 746 I x E x Eff x PF 746 I x E x Eff x 1.73 x PF 746  Chemical/Gas IDLH Listings
NIOSH Pocket Guide to Chemical Hazards To find mA for a given pressure in a 4-20 Loop:

ex. 0 - 500 PSI = 4 - 20 mA
Span of mA
Range of Pressure
ie:
16 mA
500 PSI
= .032 mA per PSI
.032 mA X 250 PSI = 8 mA + 4 mA (offset from 0) = 12 mA
or
250 PSI = 12 mA Here are LINKS to a few of the WWW's best Converters & Formula Pages.
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