Answer / sudhakar lanka

my friend, you r looking for reduce the output voltage from 420 volts,
case1: try to keep the primary tap position on maximum voltage
for example ur receiving 11.5kv , if in your transformer there is a tap voltage which is more than these value i.e 11.6kv or else apply 11.5kv on that tap position.
same as above u can try on secondary side also
case2: if u have done all the these exercise, then when u connected to load on transformer there will be voltage drop
check at that time may be ur required voltage i.e rated voltage on motor or machine when it is running on load

other wise u can check with grid supply or substation to get required voltage

Answer / k.prakashchandra

Both the voltages are 5 % higher than the normal voltages ,that means tap position is for normal primary voltage . Check the name plate details

Answer / s.b.giri

you have to reduce the turn of lv coil

Answer / k.prakashchandra

From the data furnished by you ,it appears that Tap No.1 is
the normal position as there is 5% rise in both primary and
sec voltages, for 11KV/400V Tr

is 60hz freq better than 50 hz?&why?

1 Answers  

---

while doing the excitation current test on power transformer what is the value of voltage to be applied? Nomonal rated voltage or 10% of rated voltage? Is it necessary to apply on high voltage side?

1 Answers   ACC,

---

How can get electrical "c" licence.I am complited in Deee.Passing year of 1993.Working in pvt cocern lt Line.Please advise me .Cell no 9994786021

59 Answers   Apollo Power, Chemplast, Christy Quality Foods, ITI, Mani Associates, Microtech Engineering, TAFE, Tamil Nadu Power Company, TechSun Energies, Thermax,

---

what is the acceptable limit value for Desolve Gas Analysis/

0 Answers  

---

In the N-series schneider reclosers. What is the difference between current during fault time and current at tripping? This appears in the Event log in an event of a trip out.

0 Answers   Kaytech,

---

can we use transformer for 70 Hz?

6 Answers  

---

why did lightening arrester rod probe sharp?

2 Answers  

---

types of transformer ?

3 Answers   CG, JLL,

---

why a tester wont shock while testing the power in house

0 Answers   Tessolve,

---

For Synchronisation of DG Sets Sometimes we people use NIC (Neutral Isolation Contactor) Instead of 4-pole ACB or any switchgerar..Please guide me why is it so????

4 Answers   Piramal Glass Limited,

---

what is interlocing and what is the purpose of this?

4 Answers   L&T,

---

Define bibo stability.

0 Answers  

---