Siemens DTU3005-B Especificaciones descargar pdf (Pagina 14)

Linear Loads It is important at this point to discuss the differences between a

linear and nonlinear load. A linear load is any load in which

voltage and current increase or decrease proportionately.

Voltage and current may be out of phase in a linear load, but the

waveforms are sinusoidal and proportionate. Motors, resistive

heating elements, incandescent lights, and relays are examples

of linear loads. Linear loads can cause a problem in a

distribution system if they are oversized for the distribution

system or malfunction. They do not cause harmonic distortion,

which will be discussed later.

Nonlinear Loads When instantaneous load current is not proportional to

instantaneous voltage the load is considered a nonlinear load.

Computers, television, PLCs, ballested lighting, and variable

speed drives are examples of nonlinear loads. Nonlinear loads

can cause harmonic distortion on the power supply. Harmonics

will be discussed later in the course.

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 87 88

Sin comentarios

Siemens DTU3005-B Especificaciones Pagina 14