Which is the voltage between Line and phase?

The voltage between R to Y or Y to B or B to R. In a power system, system voltage means line to line voltage. Refer to the Diagram, Example: our domestic power supply is three phases, 440 Volts. Here 440 volts means the phase to phase voltage is 440.

Which is the secondary transformer voltage, line to line?

Voltage in equations (KV) is the secondary transformer voltage, line to line. Base KVA is 10,000 in all examples. Only those components actually in the system have to be included, each component must have an X and an R value. Neutral size is assumed to be the same size as the phase conductors. See page 14 & 27 for example in Buss Book.

How to calculate SCA for a 3 phase system?

Only one calculation needs to be done for most 3 phase systems. This is for the per unit method. 3 Phase I SCA = KVA Base √3 KVLL total PUZ KVA Base = 10,000 Single Phase Two separate calculations must be done for single phase systems. I SCA = KVA Base ( KV line to line ) (total PUZ) I SCA = KVA Base (KV line to neutral) ( total PUZ)

Which is the measure of the current in one phase?

What is line current: The measure of current in one phase before the star or delta arrangement of the component is called line current (typically input current in motor or output current in the alternator). In three phase balanced system, it may be R phase current or Y phase current or B phase current. It is denoted by I L ampere.

How are voltages maintained in power transmission lines?

Voltage in Power Electric Lines. This level of voltage is increased at different suitable levels, it may be at 400 kV or 765 kV or 1000 kV. This high voltage or extra high voltage level is maintained to transmit the power to a long distant substation. It is call primary transmission of power.

What are the voltage levels in a generating station?

In generating station electrical power is generated at medium voltage level that ranges from 11 kV to 25 kV. This generated power is sent to the generating step up transformer to make the voltage level higher. From this point to the user end voltage level varies in different levels.

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Which is the transmission line equation in phasor form?

j j j j j z →= + = = = = = + θ θ θ θ θ θ θ θ θ θ Transmission-Line Equations ac signals: use phasors Transmission Line Equation in Phasor Form Derivation of Wave Equations Combining the two equations leads to: Second-order differential equation complex propagation constant attenuation constant (Neper/m) Phase constant

How to calculate the phase constant of a transmission line?

→= + = = = = = + θ θ θ θ θ θ θ θ θ θ Transmission-Line Equations ac signals: use phasors Transmission Line Equation in Phasor Form Derivation of Wave Equations Combining the two equations leads to: Second-order differential equation complex propagation constant attenuation constant (Neper/m) Phase constant

What are the equations for a transmission line?

Transmission-Line Equations ac signals: use phasors Transmission Line Equation in Phasor Form Derivation of Wave Equations Combining the two equations leads to: Second-order differential equation complex propagation constant attenuation constant (Neper/m) Phase constant Transmission Line Equation First Order Coupled Equations!