Dear Respected sir how to test ABB REX521 protection relay by relay tester.

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If the line voltage is reduced to 75% of its rated value then by what percentage current will reduce ?? 75% 25% 50% no change and why ?

0 Answers  

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why don't we use the generator as a motor? and what will happen?

0 Answers  

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In legging current reactive power is arise but in leading current which power will be arise ? and in this case, is active power more than rated ?

3 Answers  

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what is means of ALF,kPV(min),lexc(max)at Vk,Rct@75 degree centrigate ohm in current transformer name plate?

2 Answers  

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solar energy light efficiency & disadvantages?

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we convert 66kv to 33 kv to 11kv to 440v. why can't we directly convert 33kv to 440 ?

9 Answers   EMC, Jakson, L&T,

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If the soil resistivity is more large, how can we earthing our 11 k.v. transmission line?

2 Answers  

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When are the directional relays used?

0 Answers  

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Why motor initial starting current is high?

9 Answers   Pennar,

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what is the difference between earthing and grounding?

6 Answers   Bhel, Wipro,

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What is difference between A.C & D.C Resistance ?

4 Answers  

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