April 2021
Intermediate to advanced
404 pages
12h 18m
English
Content preview from Electricity for the Entertainment Electrician & Technician, 3rd Edition
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Ohm's law:
V = I × R
I = V ÷ R
R = V ÷ I
Single-phase AC power formula:
P (watts) = V (volts) × I (amps) × Power Factor
V (volts) = P (watts) ÷ [I (amps) × Power Factor]
I (amps) = P (watts) ÷ [V (volts) × Power Factor]
Power Factor = P (watts) ÷ [V (volts) × I (amps)]
Three-phase AC power formula:
P3∅ (watts) = V (volts) × I (amps) × Power Factor × 1.732
V (volts) = P3∅ (watts) ÷ [I (amps) × Power Factor × 1.732]
I (amps) = P3∅ (watts) ÷ [V (volts) × Power Factor × 1.732]
Power Factor = P3∅ (watts) ÷ [V (volts) × I (amps) × 1.732]
Power factor:
PF = cosine (phase angle) × 100
PF = Power (watts) ÷ [V (volts) × I (amps)]
PF = Real Power ...
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