Answer / pillay

i assume your question is how to take transformer oil for
breakdown voltage test.
the sample is taken from the oil drain cork. the containers
and any other equipment used for this job must be ensured it
is dry and not contaminated or this contamination will
influence the oil test results.
1. The sample is connected from the drain cork through a
small hose to a syringe. the initial oil is not taken. from
the syringe the oil is transfered to a sample bottle slowly
without forming air bubbles or too much external atmospheric
contact.this oil is used to test for the dielectic breakdown
voltage in a special tester.the minimum breakdown voltage
depends on the operating systems voltage and local
regulations.

Answer / shaikh

Hi Pillay! can you explain why initial sample of oil is not
taken and what amount of oil is requied for testing?

i need the curve duty cycle and amper for (150 kva @50% dyty cycle) transformer turn ratio :19 and vin 400

0 Answers  

---

placement paper samples of mspl company

0 Answers   MSPL,

---

What is Reactance & Impedance? what is diffrence between these?

2 Answers  

---

what must be the mf for a meter with the following conditions. line ct ratio-100/1 line pt ratio- 220kv/110v meter pt ratio- 3X63.5V meter CT ratio- -/1 A

1 Answers  

---

why we use perllel conection system in the wiring?

4 Answers   Airtel,

---

what should be the acceptrd value of winding resistance for 2.5MVA transformer

0 Answers  

---

In constant power region of 3-phase IM torque-speed characteristics, if frequency increases voltage A does not alter B decreases C increases D none of above

1 Answers  

---

why hv current transformers have big size ?

5 Answers   RailTel, TCS,

---

what do you mean by cl PS CTs? What are technical details required for it's manufacturing?

1 Answers  

---

considering the 3phase and single phase ac system the load applied and the volage given is same...will the current differs for both the cases are it wil remain same?

5 Answers  

---

how can i use REF and diffrencial relay both in 1 CT core for transformer protection?

0 Answers  

---

how many load we can take for lighting

0 Answers   ABB,

---