Write the expression for power factor in a balanced 3Φ circuit Compare balanced and unbalanced network Let the three phase circuit consists of loads Z1, Z2 & Z3. If all the loads are equal both in magnitude & phase angle and connected to a balanced supply, it is called a balanced network. If all the loads are different, it is called an unbalanced network even if the supply system is balanced. State the advantages of three phase system. All electric power generated and distributed is in 3 50 HZ. So when 1 or 2 Φ, Φ Φ supply is required, they can be taken from 3 system rather than generating Φ independently. For the same amount of to be produced, the 3 system is more economical Φ than 1 system. Φ 3 motors are easily started than 1 motors. Φ Φ 3 motor or 3 generator produces more output than 1Φ motor or 1 generator. Φ Φ Φ To transmit a given amount of power over a given length, 3 transmission circuit Φ requires less conductor size than 1 system. Φ What will be the readings of the two wattmeters used for the measurement of in a three phase circuit at unity power factor? i.e Both the wattmeters readings are equal and each will read half of the total power Write the relation between phase & line quantities in a delta connected system In Delta network, Write the relation between phase & line quantities in a delta connected system In star network, When do the two wattmeters read equal in the two wattmeter method of three phase power measurement?
Write the expression for power factor in a balanced 3Φ circuit Compare balanced and unbalanced network Let the three phase circuit consists of loads Z1, Z2 & Z3. If all the loads are equal both in magnitude & phase angle and connected to a balanced supply, it is called a balanced network. If all the loads are different, it is called an unbalanced network even if the supply system is balanced. State the advantages of three phase system. All electric power generated and distributed is in 3 Φ, 50 HZ. So when 1 Φ or 2 Φ supply is required, they can be taken from 3 Φ system rather than generating independently. For the same amount of to be produced, the 3 Φ system is more economical than 1 Φ system. 3 Φ motors are easily started than 1 Φ motors. 3 Φ motor or 3 Φ generator produces more output than 1Φ motor or 1 Φ generator. To transmit a given amount of power over a given length, 3 Φ transmission circuit requires less conductor size than 1 Φ system. What will be the readings of the two wattmeters used for the measurement of in a three phase circuit at unity power factor? i.e Both the wattmeters readings are equal and each will read half of the total power Write the relation between phase & line quantities in a delta connected system In Delta network, Write the relation between phase & line quantities in a delta connected system In star network, When do the two wattmeters read equal in the two wattmeter method of three phase power measurement?
CT_QB.docx