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.

1000 W bulb takes 4.16 Amps at 240 volt then what will be the KWH & if i am using 1000 W bulb at 180 Volt the amps will be 5.55 then what will be KWH????????????????

2 Answers  

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We have three 33kv substations. All of them energised by same source.When i am checking the phase sequence between one substation to other substation (like R Phase to R Phase) by multimeter i am getting some voltage.Near to LT panels UPS panels are there. Can u explain whether any possible to happen like that. In Phase SEquencemeter is showing correctly in both substations. How is it happen. Explain me.Explain me communication signal will produce Phase difference on this case.

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what is mean by dry frequency

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what is tertiary winding in transformer?What is its purpose?

18 Answers   Bhel,

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1 Answers  

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how can we choose the size of road crossing pipe for power cables

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What is meant by coupling capacitor?

0 Answers  

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do any one help me to get "C" license,, i have doubts ,,, if mediators ter pls call me,, my no is 8056640042

0 Answers  

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Can we use Motor protection CB while we use the VFD for Speed control?? if not means please tell the reason!!!

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what are the values to be accepted on 3 core 185sq mm for 11000volts on insulation resistance between conductors and between conductors and earthed?

3 Answers  

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How to checked frequency drive output voltages?

0 Answers  

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