in the directional overcurrent and earthfault protection,normally we are setting the angle 45 deg lead for phase fault overcurrent and -45 deg lead for earthfault fro forward direction.but both the fault are operating on the same angle region only.why?how the relay will response?

0 Answers  

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if 20 hp motor starts directly delta connection.motor what will be the effect.

3 Answers   HP,

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WHAT IS THE MEANING OF 'UPF'&'LPF'.... HOW CAN WE DEFINE IT? WHAT IS THE VALUE/RANGE OF EARTH WIRE RESISTANCE USED PARTICULARLY IN HOME....

2 Answers  

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what is the meaning of cable Glanding can you explain brifly?

2 Answers  

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power formula

1 Answers  

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1)why the transformer rating in KVA insted of KW 2)why the secondary of ct is shorted and why the PT secondary is open

3 Answers  

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why, when birds sit on transmission lines or current wires doesn't get shock?

36 Answers   College School Exams Tests, Infosys,

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How to know Resistance and Reactance value of main and aux winding of single phase capacitor start capacitor run induction motor to find capacitor value?

0 Answers   Siemens,

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How to calculate the size of window A.C. for 200 Sq. ft room?

4 Answers   UltraTech, Voltas,

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i have gear oil pump with single phase motor.some time its motor starts running in reverse direction rather than forward direction...whats the reason behind this issue. 1- either capacitor is week? 2- or winding is week?

0 Answers  

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What is the basic principal of Diesel genarator?

3 Answers   Juniper Networks, MRF,

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How frequency meter measuring frequency? What is the principle of frequency meter?

2 Answers  

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