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Question
what is "pu" in electrical engg.
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
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.
 
Is This Answer Correct ?    23 Yes 3 No
G.sunil Kumar
 
Answer
# 2
PU refers to per unit sysytem 
Is This Answer Correct ?    8 Yes 1 No
Shalini
 
 
 
Answer
# 3
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
 
Is This Answer Correct ?    9 Yes 2 No
Mahmud
 
Answer
# 4
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.
 
Is This Answer Correct ?    4 Yes 0 No
Murali
 

 
 
 
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The initial current is very large at the time of starting for almost all DC motors. SO WE USE STARTER FOR A SAFE STARTING but at our homes we donít see any starters in our coolers, motors.WHY DONíT WE NEED STARTERS FOR THESE APPLIANCES?   1
What is the diference between increased saety motors and non sparking motors?   1
In a star(primary) to delta(secondary) transformer,how you take the neutral point? HLL 2
What is the difference in Line PT & Bus PT. Bhel 1
Will The Rated Capacity of 20 MVA ,220/6.6 KV, ONAN cooling Power Tranformer be increased up to 25 MVA with respect to its %Impedence by ONAF cooling with same rating..? Ambuja 2
What is the use of Surge Capacitor in LAVT?   1
cause of failure of transformer bushes   2
why double earthing is required for welding machine & electrical tools.   4
what do you mean by the "bay" in a switchyard? how to determine exact number of bays in a substation? L&T 5
What are the condition for parallel operation of transformers? Alfanar 2
 
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