The deflection of galvanometer connected in series with the resistance to be measured gives a measure of the insulation resistance. Classify the cables according to their sheathing. Armoured cables Unarmoured cables. Name the leads present in megger. Earth lead Line lead Guard lead. How resistance is measured by using ohm meter method. Series ohm meter method Shunt ohm meter method. How resistance is measured in loss of charge method. In this method a capacitor is charged and discharged for a specific time period and from this resistance is measured. State the balance equation used in bridge methods. The product of opposite branch resistances are equal. the advantages of price’s guard wire method. In this method leakage current does not flows through the meter and therefore it gives accurate reading. How the earth resistance is measured. By using earth megger the value of surface earth resistance can be measured. State the use of ac bridges. AC bridges are used for the m/s of self and mutual inductance and capacitance. State the balance equation used in ac bridges. The product of opposite branch impedances are equal. Name the bridge circuits used for the m/s of self inductance. Maxwell‟s bridge Maxwell-Wein Bridge Anderson bridge Hay‟s bridge.
The deflection of galvanometer connected in series with the resistance to be measured gives a measure of the insulation resistance. Classify the cables according to their sheathing. Armoured cables Unarmoured cables. Name the leads present in megger. Earth lead Line lead Guard lead. How resistance is measured by using ohm meter method. Series ohm meter method Shunt ohm meter method. How resistance is measured in loss of charge method. In this method a capacitor is charged and discharged for a specific time period and from this resistance is measured. State the balance equation used in bridge methods. The product of opposite branch resistances are equal. the advantages of price’s guard wire method. In this method leakage current does not flows through the meter and therefore it gives accurate reading. How the earth resistance is measured. By using earth megger the value of surface earth resistance can be measured. State the use of ac bridges. AC bridges are used for the m/s of self and mutual inductance and capacitance. State the balance equation used in ac bridges. The product of opposite branch impedances are equal. Name the bridge circuits used for the m/s of self inductance. Maxwell‟s bridge Maxwell-Wein Bridge Anderson bridge Hay‟s bridge.
unit-1-n-2-m-n-i-notes.docx