For testing 33kv cable hipot testing. How much kv we have to
Apply .Give in details.

Answer Posted / yousaf

D.C. voltage equal to 3 x U0 shall be applied for 15 minutes. The standard is 1EC5840.

57KV FOR 15 MIN.

Is This Answer Correct ?    9 Yes 5 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Are Refrigerators & Deep Freezers the Inductive load ? How to calculate the Power Factor & hence the Output Power for them ?

4743


Don't you have similar question banks related to Oral Certification Examination conducted by Mercantile Marine Departments / Directorate of Shipping, Ministry of Shipping for Electro Technical Officer?

1310


What is a copper loss or i2r loss pc?

814


why actual valve timing diagram is different than ideal valve timing digram of a 4 stroke engine?

5161


Why are the cores of large transformers built up of circular transactions ?

1638






What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works?

1605


1. A 380 / 220 V r.m.s. 3-phase 4-wire circuit carries loads of 8 + j8.1 ohm; 4 + j4.1 ohm; and 2 +j2.1 ohmin the three phases respectively. The length of the circuit is 100 m, and the resistivity of the phase conductors is 0.0005 Ω/m. The neutral conductor is of the same size as the phase conductors. a) Select a reference angle 0for the first phase. Then write down the three phase voltages in both polar format and complex number format. b) Make appropriate assumptions, and take temperature effects on resistance is insignificant. Calculate the currents in the three phases. (Note: Determine conductor resistance, and apply Kirchhoff’s Voltage Law) Based on the result, suggest a main switch rating for the circuit. c) Show your preferred direction of neutral current in a diagram, and then determine its value. (Note: Apply superposition principle, and Kirchhoff’s Current Law) Use its magnitude to show that in this circuit, the unbalanced load may increase the voltage drop in some of the phases. (Note: Also observe the common volt drip in neutral) State your assumptions, if there are any. d) Suddenly the neutral wire of the circuit is broken. Estimate the new currents in the first phase, i.e. Phase L1. State your assumptions, if there are any.

1599


how to calculate kvar in Akiva

1557


why we use single core 630mm2 cable for transformer secondary side

572


During Starter Panel Com missing I Found The Main Incomer 40Amp MCB 10KA Trip When Motor Change Star To Delta Motor Rating 20HP BUT When We Use Same MCB To Other Motor It Does Not trip Or What Is Necessaries for Star Delta Starter MCB SFU MPCB OR MCCB And What are The Breaking Capacity of MCCB in the Motor above 15HP

1517


We normally make oil soak pits under Transformers. Oil from soak pit goes to collection pit. We provide granules/pebbles under transformers. My question is weather granules/ pebbles to be filled in soak pit or not? if yes upto what level?

10005


Why IR value of the (HT cable Plus synchronous motor) is less while individually having IR values in GΩ?

1445


does a DG set has low fault level as compared to that of a transformer.If yes then why.

1631


TCS IS IT COMPANY THEN WHY DO THEY NEED ELECTRICAL &ELECTRONICS ENGINEERS?

1571


What is FTA card? How it works?

1840