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why is the transmission voltage is multiple of 11?

voltage can be selected for other class also for
transmission, but for standarisation & convenience for
calculations, multiple of 11 is being used.

 Is This Answer Correct ? 2 Yes 8 No

Determine the BTU size of an aircon for 20 sq metre room

1023

Is there any standard guidelines/Criteria to design NGR/NGT.?

1950

kVA rating of ordinary transformer is increased when connected as an auto transformer because A transformation ratio increased B secondary voltage increased C energy is transferred both inductively and conductively D secondary current increased

1659

what is the mechanical safety of DG ?

962

lenz law application and define

1748

What will happened if the neutral of the (star connected secondry) Xformer disconnected? (if its Above KVA rated one)

1293

During Testing of Maintenance Free Earthing, How deep should be the Spikes of Earth Test Meter should be inserted in the soil(one spike is 15 Meter & Other spike is 30 Mtrs away from the Main Earth Electrode. Because, recently, we observed that when spike is inserted 3-4 Inch in the earth- results are better, If spike is inserted 1 feet deep than results are increasing.

1025

HOW TO DESIGN THE body EARTH cable(Copper Conductor) size for 60KVA UPS?

1102

1- What is the Polarization Index number be good for 15KV 3c#500MCM electrical cable? 2- Can I use the IEEE Std 43-2000 to perfom the PI test? Thanks

2433

what are the 4 rules to start the motor?

1275

A 11KV, 1200 A breaker combination fixed in a cubicle for HT motor.Is normally for 11 KV motor fuse is using? if Yes, What range fuse is required?

1090

if grounding is notdone at regular intervals for long distance transmission, will the load connected at distribution end receive voltage during negativehalf cycle of the sine wave?

1117

How to calculate ht side cable of 630 kva oil cooled outdoor transformer?

609

How to synchoronize the generator (with gcb,GT) to grid????? ????? from Grid iam getting power (rated 400kv/20kv) through GT and its goes to UAT.,,ST.,, now my generator(rated 20kv ) ready.,, now iam closing my GCB.,, in GT iam suddenly giving 20kv on that Gt.,, what will happend

1105

My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I -    is the value of AC fault current. t -    is the operating time of disconnecting device in seconds. K –  is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.

1081