Answer / riaz ahmed khan

OLTC-On Load tap Changer is used in transformers for voltage level step up or step down in load condition.

Answer / murthy ark

OLTC- On Load Tap Changer is used in Power Transformers for voltage level step-up or step-down in Load condition either at Local or at Remote / Auto or Mannual operation

Answer / tarun pradhania

OLTC - open load tap changer
OLTC is used in transformers for voltage level step up or step down.

What happened when we give 2 phase supply to a 1 phase equimpent. It's effect on equipment's efficiency and life?

5 Answers  

---

what happen when transformer connect on dc supply.

5 Answers  

---

Which types of Gases occure when mineral oil burnt

1 Answers  

---

why EMF IS INDUCED IN A CONDUCTOR WHEN FLUX LINKING WITH IT CHANGES ACCORDING TO FARADAYS LAW.

0 Answers   Sail,

---

from 33kv to 440v 2mva transformer how much full load current will be at ht side and lt side and which range of ctpt will be used?

1 Answers  

---

1.where in India the maximum transmission voltage is operated? 2.what the methods are used to cool down the transformer?give the specific ratings of the transformer & specific cooling process. 3.how zero & negative sequence reactances are formed in a rotating machine when fault occur in the system?

2 Answers   IES,

---

what is 400kv doble circuit quadpole tower?

0 Answers  

---

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?

0 Answers   Siemens,

---

Is it true that IPT are more accurate than CVT for Measuring purpose?

2 Answers  

---

how to calculate cable bending angle in a trench?

2 Answers   Eastern Cement,

---

In an electrical power supply,why if neutral phase of a 3phase supply fail over current occur but if it's single phase supply neutral phase fail low current occur? 

1 Answers  

---

what r the main parts of central chiller plant in Air conditioner ? explain the function of each?

12 Answers   ITC Infotech,

---