I = V / R

R = V / I

V = R x I

P = V x I

P = R x I^{2}

P = V^{2} / R

I = P / V

I = √P / R

I = V / R

V = P / I

I_{T} - Series = I_{1} + I_{2} + ... I_{n}

I_{T} - Parallel = I_{1} + I_{2} + ... I_{n}

1 /R_{T} - Parallel = 1/R_{1} + 1/R_{2} + ... 1/R_{n}

V_{T} - Parallel = V_{1} + V_{2} + ... V_{n}

R_{T} - Series = R_{1} + R_{2} + ... R_{n}

V_{T} - Series = V_{1} + V_{2} + ... V_{n}

W = I^{2} x R

Pf = kW / kVA

I = W / V x Pf

E = W / I X Pf

W = V x I x Pf

Pf = W / E x I

P = I^{2} R

Q = I^{2} X

Q = V^{2} / X

S = I^{2} Z

S = IV

Efficiency = Power Output / Power Input

L_{T} - Series = L_{1} + L_{2} + ... L_{n}

1 / I_{T} - Parallel = I_{1} + I_{2} + ... I_{n}

Z = V / I

Z = √R^{2} + X^{2}

Z = √R^{2} + (X_{L} - X_{c})^{ 2}

Capacitance (C) = Colombus (Q) / Volts (V)

1 /C_{T} - Series = 1/C_{1} + 1/C_{2} + ... 1/C_{n}

Inductive Reactance(X_{L}) = 2 x Frequency (F) x Inductance (L)

X_{L} = 6.28 x F x L

X

Capacitive Reactance (X_{c}) = 1 / 2 x Frequency (F) x Capacitive (C)

X_{c} = 1/6.28 x F x C

X

Reactance (X) = Capacitive Reactance (X_{c}) - Inductive Reactance (X_{L})

Max Length = Voltage drop x Kemil / (1.732 or 2*) x Current x Resistance factor.

*If single-phase, use 2. If three-phase, use 1.73

*If single-phase, use 2. If three-phase, use 1.73

Max Current = Voltage Drop x Kemil / (1.732 or 2*) x Length x Resistance factor

*If single-phase, use 2. If three-phase, use 1.73

*If single-phase, use 2. If three-phase, use 1.73

Voltage Drop = 2 x (Length/Kemil) x Current x Resistance factor

Voltage Drop = 2 x Length x Current x Resistance factor / Kemil

Voltage Drop = 2 x Length x Current x Resistance factor / Kemil

Voltage Drop = 1.732 (Length/Kemil) x Current x Resistance factor

Voltage Drop = 1.732 x Length x Current x Resistance factor / Kemil

Voltage Drop = 1.732 x Length x Current x Resistance factor / Kemil

- Details
- Written by Yanis O.

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