Answer / parag mohanty.

upper impedance is the impedance above which distance relay
will not operate and lower impedance is below which it will
not operate

Answer / bl meena

upper-above which not operate
lower-below which operate

Answer / srikrishna kumar

the operation of the relays depended upon the magnitude of
current or power in the protected circuit. however,there is
another group of relays in which the operation is governed
by the ratio of applied voltage to current in the protected
circuit. such relays are called distance or impedance
relays. in an impedance relay, the torque produced by a
current element is opposed by the torque produced by a
voltage element. the relay will operate when the ratio V/I
is less than a predetermined value.

Differentiate AC and Dc resistance

0 Answers  

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how will protect transformer agint overcurrent protection

6 Answers   MPSEB,

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for selection of transformer we will considering 5 to 6 times of starting current of higher rating motor connected to secondary side. according to process wise we will start the motors gradually suppose if we will start 15 to 20 motors at a time wat will happen?

1 Answers  

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air condition capacity for masjad having 50feet in circal and 35 feet high

3 Answers  

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what is the differation bewreen kwh & fundamental kwh in electronic trivector meters

0 Answers  

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For a Potential Transformer(PT), the primary neutral terminal must be grounded before energization. Why....? What will be heppend if we energize the PT without grounded the primary neutral point? Why..........?

2 Answers  

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why capacitance effect is predominant in underground cable transmission and inductance effect is predominant in over head line transmission?

0 Answers  

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why ht alternators gland plats using brass?

1 Answers   ONGC,

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what is different between grounding and earthings?

4 Answers  

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how can we chack a capacitor in acircuit

2 Answers  

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What can a fresh(without experience) electrical engineer contribute to NTPC( Or any PSU company) growth?

3 Answers   NTPC,

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To test Transformer we give HT side 440V to see wheather that it is producing 17.6V on LT to verify Voltage ratio is correct or not but when we give the 440V voltage to LT side then what will happen to HT voltage ?

3 Answers   Aditya Birla,

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