Three Phase understanding

Which configuration gives us two values of voltage?

• Star

• Delta

• Star two-phase

• Delta four-wire

Measuring across two lines of a star-connected three-phase four-wire

supply system from the local substation would have a voltage of:

• 230V

• 400V

• 25kV

• 132kV

A load connected to phase and neutral of a star-connected three-phase four-wire supply system from the local substation would have a voltage of:

• 230V

• 400V

• 25kV

• 132kV

The phase voltage of a star-connected load is 100 V. The line voltage will be:

• 57.73V

• 100V

• 173.2V

• 230V

The phase voltage of a delta-connected load is 100 V. The line voltage will be:

• 57.73V

• 100V

• 173.2V

• 230V

The phase current of a star-connected load is 100 A. The line current will be:

• 57.73A

• 100A

• 173.2A

• 230A

The phase current of a delta-connected load is 100 A. The line current will

be:

• 57.73A

• 100A

• 173.2A

• 230A