What is the base voltage?
The base voltage is chosen as the nominal rated voltage of the system. All other base quantities are derived from these two base quantities. Once the base power and the base voltage are chosen, the base current and the base impedance are determined by the natural laws of electrical circuits.
What is the mathematical formula for voltage?
Ohm’s law equation (formula): V = I × R and the power law equation (formula): P = I × V. P = power, I or J = Latin: influare, international ampere, or intensity and R = resistance. V = voltage, electric potential difference Δ V or E = electromotive force (emf = voltage).
What is the be voltage between base and emitter?
As the first figure shows, for any decently large base current the voltage drop between the base and the emitter will be around 0.6 to 0.7 V. Mathematically, this means that the BE voltage is the log of the current.
How to calculate the value of voltage per unit?
For example, if the base value of voltage had been selected as 13,800 V and the present value is 11,000 V, the value of voltage per unit is VPU = 11,000 ÷ 13,800 = 0.797 PU, or VPU = 0.797 (100) = 79.7% PU Often, nameplate values are taken as base values but this need not be the case.
What is the difference between base voltage and MVA?
Whereas with single-phase equipment the base voltage and MVA are phase values, in the case of three-phase equipment the rated voltage is usually the line-to-line voltage and rated MVA the three-phase value. Taking these now as the base values gives as in the single-phase case, but now the base current is given by
What should the base voltage of a transistor be?
It appears that base-emitter voltage (Vbe) in transistor is always assumed as 0.6 V in circuit analysis. I’ve seen one figure (see attached image). It seems over the wide range of base current (Ib), Vbe doesn’t change much. Thus we can interpret this as it is safe to assume Vbe of 0.6 V.