Answer / sanket

YWY- IT MEAN COPPER CONDUCTOR,Y- PVC SHEATH,W-SINGLE ROUND
WIRE ARMOUR Y- PVC INSULATED CABLE..

AFWY DONT KNOW BUT U CAN FIND LIKE THIS

IF THERE IS NO MENTION FIRST IT MEAN COPPER CONDUCTOR(1)
A- ALLUMINIUM COND.(1 CHARACTER)COPPER OR ALU.CONDUCTOR
Y- PVC SHEATH (2)
F- SINGLE ROUND WIRE ARMOUR (3)EITHER F,W OR FF,WW
W- SINGLE STRIP ARMOUR (3)
FF-DOUBLE ROUND WIRE ARMOUR (3)
WW-DOUBLE STRIP ARMOUR (3)
Y - PVC INSULATED(4)

A 3 phase motor operating off 415V system is developing 20Kw at an efficiency of 0.77 and power factor of 0.73. determine:- a)the line current. b)the phase current if winding are delta connected. c)the phase voltage if winding are star connected.

1 Answers  

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what is buffer resistance starter.?.What is the working principle and where it is used..?

0 Answers  

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1hp single phase load = howmuch 3 phase load

0 Answers  

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Sir, I have applied for the of Jr.engineer(Electrical & Electronics) & ASST. LOCO PILOT at ALL RRB BOARDS. please send me all RRB Boards solved papers in the year of 2001 tO till date. i requested send me the papers to my id as soon as possible (jet_0991@yahoo.com). (This is very urgent) Thank You,

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One amps in HT is equal to how manys amps in LT

5 Answers  

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why occ curve is not tracing back when we are bringing rheostat back in reverse direction?

0 Answers  

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Is there any rule to select the voltage of motor based on KW rating? What is the rating above which lt motor becomes the HT motor?.

0 Answers   DAE,

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following are the questions asked in interviews: 1) Considering the short circuit fault, which switchgear is preferable, SFU OR MCCB? Which operates faster? whicg one is popular in Indian Market and why? 2)Define SCPD. What is type2 coodination? 3)Why the contactor rating is higher for the fuseless selection than for fuse selection? whether the ratinf of SFU or MCCB remains the same in both the cases? 4)If the HP rating is known then can you calculate the ratings of L.V Switchgear(SFU/MCCB, contactor, OLR) without using the selection chart?

0 Answers  

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Why we are using Ohm's law? where it is applicable? explain.

10 Answers   Pyramid Saimira, TCS,

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If Polarization index of motor 8.75 at 500volts of medium voltage 4.16 KV motor what this mean winding good or bad pl answer if any reffrence book give me the link

0 Answers   Marafiq,

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Can anybody post questions asked in Engineers India Limited Interview? Thanks in advance.

0 Answers   Engineers India Limited,

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what will happen if i will done heart shape hole in transformer core?

1 Answers   Bhel, ONGC,

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