Interested to Buy Any Domain ? << Click Here >> for more details...
What are formula we can apply to determine the HT/LT current of 11KV/433V transformer except KVA/LV×√3. ?
- 2 Answers
- 37672 Views
- I also Faced
- E-Mail Answers
Answer Posted / pradyumna171
Fourmela No 1 power in one phase/Voltage in one phase(I.e phase voltage)
example there is a 300 KVA 11KV/433 V transfomula. Power in one phase 300KVA/3 =100KVA both in HT & LT side, Phase voltase in HT side 11/√3 = 6351Volt .Phase voltage in LT side 433/√3 = 250 Volt.
According to formula HT side current 100,000/6351 = 15. 7 amps. and LT side current 100,000/250 = 400 amps
Formula No 2 for HT side transformer in kVA/20 and for LT side KVA×4/3. field lineman are using this formula.
According to this formula 300 KVA transformer's HT side current 300/20 =15 amps apporximately +5℅ may added for big size to accurate value. And LT side current 300×4/3 = 400 amps apprx.
In general formula for 300 KVA 11KV/433V transformer HT side current KVA/LV×√3 i.e 300000/11000×1.732 = 15.7 amps .LT side current 300000/433×√3 = 400 amps
PRADYUMNA CHANDRA PANDA
mob No 943
7917849
| Is This Answer Correct ? | 4 Yes | 6 No |
Post New Answer View All Answers
what is the generator rating for 40 amp load of 3phase motor.?? 400v voltage of generator... plz tell me with formula its urgent...plzzz... and also tell me that this 40 amp at all phases mean 40 amp on red,40 amp on yellow,40 amp on blue...... or the total sum of that 3phase is 40 amp....
what are the major & minor faults that occur in an inverter and in UPS ? And how to repair and resolve them ?
can i connect wavetrap in 2 different phase in EHV line?
What is difference between unity power factor wattmeter and upper power factor wattmeter? In short circuit test of transformer the wattmeter used is unity power factor type or upper power factor type wattmeter?
what is the function of statics switch in ups and tell me parts
What are the basic elements used for modeling mechanical rotational system?
my b-tech percentage is 50%. what answer will satisfy the hr ?
i want to know about torque of slip ring induction motor
How o select the electrical fuse?.What are its characteristics.How to select the material od fuse?
What is inrush current?
at what base you will tell the direction of rotation of dc motors and generators?
ow can i get certificate of competency as electrical supervisor and my diploma in electrical engineering from jalgaon.
How many energy meters can be connected on a 15VA Voltage transformer. please send a calculation sheet.
is ac supply can store
If the line voltage is reduced to 75% of its rated value then by what percentage current will reduce ?? 75% 25% 50% no change and why ?
