Answer / samir

RCCB is nothing but only a current transformer which
detects the difference of incoming and outgoing
current,while in phase wire draws 1 amp and 1 amp returns
in neutral the net current of of CT secondary will nil,but
when Phase wire draws 1 amp and neutral will return 900 ma
(in case of leackage due to bad insulation of equipment) so
net difference of 100ma will be detected by the CT and its
secondary connected with coil and plunger,plunger will
actuate and it will trip RCCB mechanically.

Answer / nagesh.patwari

Yes, it works on Single phase.

Draw a circuit diagram in which if button is open we can use socket and bulb as a series test circit and if button is close than simple we can use socket as any load purpose.

0 Answers  

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why in power staions distriution r like 11kv,33kv,66kv in india?

4 Answers  

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There are a Transformer and an induction machine. Those two have the same supply. For which device the load current will be maximum? And why?

4 Answers  

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why motor range is available 22kv,30kv,37kv,45kv and so on? why motor range is not available 21kv,24,25,26,27kv and so on?

0 Answers   Government, PSU,

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please describe the Transformer setting, Motor setting, I/C setting, Tie setting

0 Answers  

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Dear all, how we select the cable size according  to current with or without including different correction factor , is there any direct method for sizing of cable... 

0 Answers   Kharafi National,

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What will happen if primary of transformer is fed with Square wave instead of sinsoidal wave ?Will it operate or Not?

3 Answers   Areva,

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i have a 4 Mva transformer 34.5 kv / 480-277 v and i used 2 parallel 3200 amp bus duct for the secondary feeder using 3 ply of bus bar ( 3/8" x 5" ) as a common where the flexible link terminated and 6300 amps breaker for the main, the lower bus duct reaches 70 degrees and the upper bus duct reaches 55 degrees when i used thermal scanner. why the temperature is not balance when the load reaches 3600 amps.

0 Answers   SCM,

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The size and construction of bushings in a transformer depend upon?

0 Answers  

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Can double compression glands be used with regular cables?

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3 Answers  

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What is OLTC in transformers and what is its function?

4 Answers  

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