Transformer Connections II

Front

This type of 3-phase connection has one end of each coil connected together and the other end of each coil left open for external connections.

Back

Wye

Front

This type of 3-phase connection has the wire from the ends of each coil connected end-to-end to form a closed loop.

Back

Delta

Front

Nominal voltage is the designed voltage level, not the actual voltage measured at the installation. True or False?

Back

True

Front

With regard to current values in delta systems, these two currents flowing through the windings are how many degrees out of phase?

Back

120

Front

The delta wiring configuration places each winding across the phase to phase source voltage, therefore, the voltage across the winding will equal what value?

Back

Line voltage

Front

How can you calculate Line voltage when two windings, attached at a common point, are connected to two separate phase line sources and are 120 degrees out of phase with each other?

Back

Line voltage equals winding voltage X 1.732

Front

When the power supply is 60 Hz AC, the second harmonic of the fundamental harmonic are what value?

Back

120 Hz

Front

Only singe-phase loads generate triplen harmonics.

Back

True

Front

The in-phase power component is known as what?

Back

True power

Front

Single-phase devices with rectifier power supplies, such as fluorescent lighting with electronic ballasts, computer, copiers, and other similar electronic devices, are a significant sources of harmonics. True or False?

Back

True