I try to check the three phase voltage in multimeter, in 125A isolator switch incommer. first i touch R phase, and then i touch Y phase using multimeter, the moment i touched, it blasts and that moment i got blindness. multimeter selector position is correct(750V AC MODE AND RED PROBE WASS IN v AND BLACK PROBE WASS IN COM. MODE. COULD ANYBODY GIVE ANSWER FOR THIS TO AVOID FURTHER ACCIDENTS PLEASE?

2 Answers  

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Please help me regarding my one concern. - During earth pit testing we noticed that the Clean earth pit and dirty earth pit showing continuity (Resistance value - 5ohm) . I want to know that if both earth pit have separate location and there is not internal looping between PIT then why such continuity is showing on it . Because of this issue the field side all earthing point showing short. In PLC panel we are providing two types of earthing cable which is coming from separate earth pit (Clean and Dirty earth pit) because of earth PIT showing short our PLC is not complying spec . please help regarding this issues.

0 Answers  

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how to find out speed of single phase motor

6 Answers   BARC,

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why we use REF and Differential Protection in one transformers?my doubt is both protections are operated in internal fault only.why we want to use 2 protections?please clarify.

7 Answers  

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what is the tolerance for the magnetic balance test conducted on the distribution transformer?

0 Answers  

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why do we prefer VCB over OCB? what are the advantages of Vaccum Ckt. Breaker over Oil Ckt. Breaker?

2 Answers  

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when the flux enters into saturation mode then what will be the secondary voltage of the normal t/f?....high or low ? explain ...how?

1 Answers  

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give me name of current and volatge control device

1 Answers  

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when we start the tube light, then it takes initially 1100 volt, after glow it takes 120 volt?(when we give 220 volt a.c.)

3 Answers  

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Which loss in DC machine is maximum?

1 Answers   IFFCO,

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What is the function of Antipumping Relay and Lockout Relay?

1 Answers  

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What is the diff. between single compression and double compression gland

0 Answers   ASL,

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