can we use the step down transformer to step up transformer
- 6 Answers
- 6865 Views
- I also Faced
- E-Mail Answers
Answer Posted / akatugba
On the issue of reversing step down as step up....Do you
ever put the 4poles into consideration..What now happen to
the grounding for protection, is the 4th pole for grounding
going to be on the 11kV outgoing? or on the incoming
415volts
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
how to carried out DAR test in 11 KV Alternator ?
why we get 2 differnet values for power factor in 2 watt meter method in 3 phase
We have drive feeding an output contactor for a 5000 hp motor @ 5kV application. The motor FLA is 629amps x 1.25% service factor = 786.25 amps The cable that we current have in place between the drive and the output contactor is 350kcmil- MV-105 (parallel cables). Per the NEC table 310.60 (C) (69). This show the cable ampacity is at 615 amps per cable for a rating of 1230 amps. We have derated the cable for the cable tray and the multiple cables application and our calculations show that after the correction factor factor we are at 922amps. 1230 amps x .75% correction factor factor = 922.5 amps. The customer is driving us to then use another safety factor of .25% off of the already derated cable. Can you please provide a longhand calculation for your solution on this application?
how do i commission a distribution transformer knowing all its ratings and transformation ratios?d
Can we put 3 layers of cable tray while installing tray
Explain the working of variable frequency transformer?
how can we understand that where we have to use ac or dc coil for solenoid valve and why?what is the different between coil of ac and dc explain please.
What is dielectric loss?
I WANT YHE TECHNICAL AND ELECTRICAL SPECIFICATIONS OF 2x4MW 11KV 2x10MW 11KV 2x25MW 11KV 2x100MW 11KV HYDEL POWER PLANT i.e PROTECTION SYSTEM,MONITORING,CONTROL SYSTEM,GENERATION,SYNCHRONISATION,METERING PLEASE SEND THE DETAILS TO MY MAIL ID SPRAVEEN_222@YAHOO.CO.IN
Pl. brief about break-down maintenance of machine tool.
1. What is differential relay? How it operates? 2.How to calculate the Short Circuit Impedance in Transformer? 3.What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works? 4. While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply? 5. What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer? 6. Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example? 7. Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient? 8. What should be the minimum and maximum ohmic value for earthing? 9. Why DC Currents are not used in transformer? 10. What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?
how to measure the transformer resistance values(dyn11)?and howmuch the minimum value?
Define liftable weight of a transformer? Does the total weight of transformer include oil weight?
in non technical way how can u define POWER FACTOR??
WHAT IS THE MEANING OF BALANCED / UNBALANCED IN STABILIZER TYPES.
