Answer / g.sunil kumar

Pu stands for per unit and this will be used in power
system single line diagram there it is like a huge
electrical circuit with no of componenets (generators,
transformers, loads) with different ratings (in MVA and
KV). To bring all the ratings into common platform we use
pu concept in which, in general largest MVA and KV ratings
of the component is considered as base values, then all
other component ratings will get back into this basis.Those
values are called as pu values.

Answer / shalini

PU refers to per unit sysytem

Answer / mahmud

the per unit value of any quantity is defined as the ratio
of the quantity to it's base value es pressed as decimal.


p.u=actual value/base value

Answer / murali

the pu system simply th concept in electrical engg. once
the base value is defined, we can easily visualise each
parameters.
this makes the calculation very simple.

Give details of your interested designation, the post you are interested to serve the company better and explain why you think you can serve the company better in such position if employed?

0 Answers  

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What happen if you keep open the Neutral Grounding Switch in open condition of the HT Generator at starting and again on load if it open then?

1 Answers  

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We have .ht motor which is 60Hz.we run on 50Hz.so that it's speed reduce but we had one prob.that motor winding temp increase up to 135 deg.we want reduce this temp.what to do?we arrange ext.cooling fan but not much effect.we want reduce this temp. Inhouse without affecting much.cost. also don't want reWINDING OF MOTOR?

3 Answers  

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why should small green grass ans small plant should not be there inside the transformer Yard in the factories

0 Answers   Riddhi Siddhi,

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What is an electric arc?

3 Answers  

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Natural frequency in the control system represents nature of a. Transient response b. Oscillations c. Overshoot d. Speed of responce

1 Answers  

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why transformer not used to starter

1 Answers  

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FOR 3 PHASE DISTRIBUTION,WHY WE USE ONLY THE VOLTAGE LEVEL OF 440 VOLTS

1 Answers   AITM,

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On wat basis TSM & PSM are set? Example.TSM=30% n PSM=2.5A....Hw they are set and how we come to know that the particular relay should be set to this value only?

2 Answers  

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How much must be gape bitween 2 cable on cable tray?

1 Answers   El Seif,

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is there any chart showing the suitable cable size according to AMP and length ? for three phase motors

0 Answers  

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Please let me know when replacing electromechanical Relays for protection of generators with sr489 multilin Relay, then there is no need to use 86 master trip relay Too. I am wondering this multilin relay has no contact to Stop breaker reclosing as 86 does

1 Answers   Neucel,

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