what is the difference between line & phase current in star delta connection motor?
Answer Posted / e. segovia
In 3ph star connections we can prove by means of drawings
or maths methods that Line current = SQRT(3)*Phase
current, and in delta connections Line current = Phase
current, that is why we use star-delta connection for
heavy motor startings. This means we can lower the current
at starting and then after having overcome the system
inertia we swap to delta connection. worth mentioning that:
In delta, Line voltage = Phase voltage
In star, Line voltage = SQRT(3)*Phase voltage.
Is This Answer Correct ? | 4 Yes | 1 No |
Post New Answer View All Answers
WHICH SIZE A.B.CABLE IS USED FOR 11KV.
What is the difference between shortcircuit current, rated current of cable & MCB with example? What will be the size of cable required for 5.5 KW motor (Full load current 10 Amps approx.), Starting current with DOL is 120 Amps. Aprrox. Short circuit current with LLLG fault is 2000 Amps Approx.
how was your last weekend.
for 5KW resistive load can anyone please suggest me whether to go for UPS/Inverter or Generator depending upon cost calulations
What does quality factor depend on in resonance?
What will be the voltage regulation of a full load and 0.80 power factor lagging load transformer when a two winding single phase transformer has a voltage regulation of 4.5% at full load and unity power factor?
What kind of Neutral CT can be placed in 11/0.433KV transformer to be used and what are its specification?
as a electrical student why should i hire you?
What is core CT & it's function?
What is true sine wave or pure sine wave inverter?? Is it sine wave or step wave?? If it is step wave, waves with how much step is considered as pure sine wave? Is it possible to produce pure sinewave using power electronics?
What is measurement?
In Designing the rating & accessories of a MCCB how to choose the type of releases..means what is the basis for selecting, thermal magnetic, electromagnetic & microprocessr based releases
Is phenomenon of resonance is harmfull fr the machine? if not or if yes please explain it?
What is star-delta transformer?
what is per unit calculation?looking for simple and strong explanation thk u