Why generally the transformer primary is connected in star
& secondary in delta
Answer Posted / raul
its absolutely wrong dat most of d times the primary is
star connected and sec is delta connected...........the
connections depends upon d type of service
required........i.e star-delta is used as step down
transformer, delta-star as step up transformer.........star-
star is rarely used until required due to disturbance
caused in d neighbouring communication system .......
|Is This Answer Correct ?||4 Yes||1 No|
we have 3.5MVA-11/6KV transformer. how can we calculate earth fault current and NGR calculation?
which one is more efficient, torq, power & ecnomy with the same frame size AC motor / DC motor?
how are reversing the direction of dc motor
the winding of Generator and Motor is star or in delta ? and why
how we decide scurt (disc) of insulator with respect to kv rating
I PURCHASED A DEISEL GENARATOR SET OF AVR TYPE& RATING 125KVA BUT SOME TIMES THE OUTPUT VOLTAGE IS FLUCTUATING WHAT ARE THE PROBABLE REASONS GIVE ME
When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<
how to calculate percentage impedence at 75 deg C at normal tap
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
description with working of all parts of a Diesel generator???????
How Calculet The UPS AH In Load
how to get electrical supervisour certificate in gujarat
How can we connect additional batteries to three phase ups? What are parameters we have to check when connecting?
difrent between vcb acb sf6 and mccb breakers
what is the difference between single ratio, multiple core and multiple ratio, multiple core ? please explain.