Answer / chander, ak

High impedance principle means that protective relay has a
such a large series impedance that even the largest through
fault current occuring during transient condition does not
start an un-necessary relay operation.High impedance relay
is one in which all CTs must have the same ratios. it is
employed in The differential protection of generators, bus
bars, motors and reactors.
Low impedance relays do not have any additional series
impedances and are usually employed for transformers
differential protection.

Answer / rsn

i am also search answer

Answer / grv

Find the perfect answer herehttps://www.linkedin.com/grp/post/1801744-5938258109569986560

Answer / premsns

Boss , may i know the relay operation in which transients
occurred in Low impedance protection

how do we calculate cable sq mm size,that if 50 A load

2 Answers   GTL, PowerTech,

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what are tpes of insulaors& its uses

1 Answers   ABC,

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2 Answers   APCPDCL, PTCL, Rolls Royce, Siemens,

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why power generated only 11KV not more than???????? and why power up/down is multification of 11*?=??.??? foe Example 11/33,11/66,66/11KV etc,

8 Answers   Essar,

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There are two nos of 33Kv/11Kv 5MVA transformers conecting through HT cable from substation having metering at substation itself.One transformer used at a time another remains stand by.Further 11 nos of 11Kv/440V transformers are attached on it and each transformer is having its own Power factor correction panel.Now one 33/11Kv transformer at no load condition/Stand by condition is having power factor in leading side upto 0.21 and while when another tranformer at same situation have power factor in lagging 0.42. Now one thing is clear that transformer one is having 1.5 Km long 33kv cable due to that PF goes in leading side and another is having only 250 mtr length remains him lagging. Now i want to know that how i can maintain the Power factor at no load/ stand by position though both are behaving in seperate manner.

1 Answers  

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Is electro plating what type of load whether resistive, inductive or capacitive loads

0 Answers   Apollo,

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what is AH of battery

6 Answers   NSIC,

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difference between circuit breaker and switchgear?

6 Answers   L&T,

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1 Answers  

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As per BIS, Earth pit resistence value?

4 Answers  

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Why Power factor is different - different in all three phase of a 3 phase nduction motor.

2 Answers  

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which type of material is used for making motor encloser

3 Answers  

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