Siemens DTU3005-B Especificaciones descargar pdf (Pagina 17)

Sags and undervoltage can be caused when high current loads,

such as large motors are started. Undervoltage may also occur

when a power utility reduces the voltage level to conserve

energy during peak usage. Undervoltage is also commonly

caused by overloaded transformers or improperly sized

conductors.

Swells and overvoltage can be caused when high current loads

are switched off, such as when machinery shuts down.

Overvoltage may occur on loads located near the beginning of a

power distribution system or improperly set voltage taps on a

transformer secondary.

Voltage and Voltage unbalance occurs when the phase voltages in a three-

Current Unbalance phase system are not equal. One possible cause of voltage

unbalance is the unequal distribution of single-phase loads. In

the following illustration loads are equally divided.

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 87 88

Sin comentarios

Siemens DTU3005-B Especificaciones Pagina 17