in indoor type circuit breakers why only the corner breaker trips specially during cold season. What is the reason.

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Meter p.t. ratio= 3×230/400 , c.t.ratio = 3×1 (2) A what is m.f.

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what is the basic need of domestic loads 1- voltage 2- current

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Can anyone explain me the operating principle of the megger tester?( I just know that its diflection relates with the ratio of currents of control & diflecting coil. I need more information as breif as possible)

1 Answers   TCS,

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

2 Answers   GTL, PowerTech,

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how to find the transformer neutral copper earthing size 

1 Answers  

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What is meant by reverse polarity and how it can be fixed?

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why battery dc voltage become Half when we check with respect to ground for example 120volts + and - terminals and when we check + terminal with Earth thats 60volts why 60volts same result on 24Volts and with ground 12Volts only expert answer that thanks we can not ground the battery.

2 Answers   Etimaad,

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hello!my name is sheikh iam preparing for indian engineering servieces,please send me the old question papers..to sheikhshaazforjobs@gmail.com

0 Answers   APCPDCL, apspdcl,

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In our plant we have installed new MCC with ELR and CBCT which is detecting some leakage current in the system but it leading to some confusion when to check that in which feeder which is drawing current we put off the whole panel itself but still CBCT detecting some leakage current so can anybody ans me , where i am going wrong or how to detect whether its actual leakage or CBCT malfunctioning.

0 Answers   Saint Gobain,

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for high freq ac,why we first convert AC to DC and then DC to high freq.AC

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What is triac?

3 Answers   NTPC,

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