Why transformer used in UPS??

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1.Z transform always lies around ? a) origin b) pole c) zero d) z=1. Multiples Mcqs which is bother me can’t find answers on internet. Some help required with little explanation . Note: this is not homework or related to any test. Thanks

0 Answers   CCP,

what is meant by impulse voltage?

0 Answers   Masseera,

how system voltage affect the power factor or vice-versa.

4 Answers  

Explain about retrofitting of machine tool.

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what about electrical pannel.? What is meant by plc pannel.?

0 Answers   TATA,

1. Can a 12v DC choke operate a 60v/12w PL lamp ? 2. Can a 230v ballast fire / operate a 60v/12w PL lamps.

0 Answers   ICS Integrated Computer Solutions,

if a damaged 500kva transformer with %impedance 2.6 is replaced by two transformers of 250Kva with different % impedance will they be able to catter the load. what will be the ratio of load on the two transformers if the % impedance is in the ratio 1:2

2 Answers   Siemens,

how do we know the LT or HT panel trip by some broblem which indication willshow

2 Answers   TATA,

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.

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what is the use of power transformer in GSS.

0 Answers   DLF, TCS, College School Exams Tests,

Is phenomenon of resonance is harmfull fr the machine? if not or if yes please explain it?

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why we use end termination kit for ht xlpe cables

1 Answers  

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