Answer / rumna

a ckt breaker consists of two parts- a fixed part and a moving part. under normal operating conditions these two parts remain in contact. when fault occurs the trip coils of the ckt breaker gets energised and the moving part are pulled apart by some mechanism thereby opening the circuit.

we are having 110 Kv,250mA Electrostatic precipitators for coal fired boilers. what will be static voltage and current after discharge and what time it will remain before earthing?

0 Answers   Siemens,

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A genarator is connected through a 20MVA ,13.8/138 KV stepdown transformer to a transmission line. at the reciving end of the line a load is supplied through a step down transformer of 10MVA,138/69 KV rating .A 0.72 PU load evaluated on load side transformer ratings as base values ,is supplied from the above system for system base values of 10 MVA and 69 KV in load circuit the value of the load in generator circuit will be ...........

1 Answers  

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what are the installation procedure of high voltage power transformer,CT,CB&PT?

0 Answers   Siemens,

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Why CT secondary should not be kept open?

7 Answers   Anna University,

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single phase brower fan with control starter. *problem is when operate it.It will be trip.

1 Answers  

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I find that underground strip-armoiured,4core,LT PVC cables in an earthed power distribution sytem are occasionly found in charred condition-with no trace of it except ash. Is this because of no proper earth connection/continuity (giving rising to high armour resistance)in the joint enroute or because of insufficient capability (again due to high armour resistance)of cable-armour to carry fault current or due to neglected /unprotected overloading of the cable or due to high armour currents caused by power thefts where only phase(s) are unauthorisely tapped & at the point of poer consumption earth terminal is established by burring underground a not so good earthing rod (or using an underground water pipe for the purpose)

1 Answers  

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In scott connected transformer number of turns in the primary winding of teaser transformer is % of number of primary turns of main transformer A 86.6 B 57.7 C 14.4 D 33.3

1 Answers  

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IN HT MOTOR HT REFERS TO HIGH TENSION OR HIGH TRANSMISSION?

11 Answers  

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what are your career plans upon completion of the programme and the relevance of recity generation to your professional development?

0 Answers  

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Why is the starting current high in a DC motor?

2 Answers  

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what is relation between HP & BHP

3 Answers   Usha Martin,

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HOW TO REDUCE POWER PLANT AUXILIARY POWER CONSUMPTION?

0 Answers   TATA,

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