Answer / rcf

Usual megger tester once set to range already have value,
to check if the tester is OK, connect to tested equipment
the Ground probe then the other one to Earth. Reading must
be ZERO.

Answer / sarkars

If this is an insulation Megger tester,short both terminal momentarily for a short duration and check it's pointer shows zero or not.If it is zero then it is o.k. otherwise not.For checking correctness of Megger reading you have to compare with standard one.

How to check the specific gravity of the two 12 V batteries connected in series to a 24 V UPS and inverter ? will we have to disconnect all the connections and turn off the UPS and inverter or not ? will we have to check specific gravities in each cell of the two batteries ? what is the name of the instrument that is used to check the specific gravity and whats the procedure to check the specific gravity with it ? thanks

2 Answers  

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Is neutral transformer can be called as control transformer?

0 Answers  

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in elevator industries , how to calculate the required KVA for the elevator (elevator spec- 40A module , motor of 13.5KW, 20A)

1 Answers   DLF, Tata Steel Limited,

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What will happen if 40W and 60W Bulb is Connected in Series.

2 Answers  

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1)how to reduce the value of tan delta of trasformer and CB,bushing,CT&PT,CVT ? 2)how to reduce the resistance of CB contact and its operating time? 3)plz.....send me the project report on conditioning and monitoring of substation equipment on my email id (gusaiyogendra03@gmail.com)

0 Answers   L&T, PK,

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In a transformer ,when voltage decreases current increases. but this is a violation of oms law.why?

15 Answers  

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What are the advantages of stationary armature and rotating field system?

0 Answers  

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A 230V dc shunt wound motor has an armature resistance of 0,15Ω.When operating on no load at 650 rev/min the armature current is 6A . The motor takes a full load current of 85A. Calculate the full load speed if the field flux is (i) maintained constant (ii)reduced by 0,03

0 Answers  

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What happens if the secondary of the transformer is shorted?

2 Answers  

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EXPLAIN WHY THE SURGE CURRENT RATING OF AN MCCB OR CIRCUIT BREAKER DECREASES WITH INCREASE IN THE RATING OF MCCB OR CIRCUIT BREAKER.

0 Answers  

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How to put breaker in service / test position.

1 Answers   KSEB, L&T, Siemens,

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Why overhead transmission line in triangular shape?

2 Answers  

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