WHY WE USE CABLE JUNCTION AFTER BETWEEN TANSMISSION LINE
AND TRANSFORMER
Answer Posted / pritish
junction cable is placed in between the trans. and a sub station due to the following reasons.
when a high voltage surge fall on the transmission line it propagates to the either side of the tr. line. we know that the surge impedance of a transmission line is nearly 400 ohm and the surge impedance of a cable is 40 ohms. hence when a surge comes to the sub station from tr. line, the magnitude of surge voltage decreases to a great extent on the cable side due to voltage divider rule. hence the equipments in the SS can be protected.
for details contact :pritish.nath@gmail.com
Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
stand by earth fault protection (51G) for transformer rating 2000 kVA,Dyn11,33/0.400 V. LV NCT ratio and necessary resistor and metrosil values how to calculate
what kind of quetions will ask in BHEL in interview? Plz help me?
what is fault level of power system ?
If I want to replace a 26KW Slip ring Motor with a Squirrel Cage motor & Drive (for a Hoist Application). How can I approximate the Motor & Drive HP required in new Setup.
wish of these transformer uses oil?
sir i applied for hpcl(electrical).i want to know from which subjects most of the technical que will b asked.and pattern of the written test.pls help me
Why do we need a separate control desk & PLC control panel in Boiler plant or coal handling plant? Can we provide cost effective Control desk cum PLC panel. Is there is an specific need for control desk.. kindly advice.
explain supply side and demand side energy management with advantages & disadvantages
before synchronizing an alternator,power factor is leading ,why?
How i can calculate current of cable according to ares?
What is the Minimum winding resistance of motors ( small & big)? referance range
What is mean by hot and cold loop testing?
how can i use REF and diffrencial relay both in 1 CT core for transformer protection?
write a program that prints prime numbers from 1-20 in digonal form
sir& friends i want the collection of recent quetions asked in interview of top most companies please send me on my email san.jsr@hotmail.com