Answer / srirama

due to airgap between the lines

Answer / raja

in practicaly if the pin insulator losses its insulation
also it will happen
loose conection between two pin insulator also it happens
and due corona effect also it happens

Answer / sunil.dutta

all answers are wrong. Please understand question carefully.

Humming noise in tr. lines is due to charging and
discharging of lines under very high voltage.

Answer / sudharsan

Due to the production of faint yellowish gas around the
conductor ...(due to ionisation of gas ) called corona.

Answer / guest

because of hysteresis losses

Answer / durgaprasad

Because of transfer the high voltage & current

What is the real use of reactive power in a electrical system other than loss (inductive &capacitive).I want to know its real physical significance.

0 Answers  

Why we should use delta connection in primary and star connection in an distribution transformer, which converts 400v a.c. voltage to 33kv.

15 Answers   ABC, Kirloskar, Sify,

the question is about buchloz relay why we called it buchloz relay

7 Answers   HIL,

Pls mail me utility & Dg related question with answer

0 Answers  

what is accuracy ? in any meters , coils accuracy . how can u defined that ?

0 Answers   Adani,

Brief difference btween aluminium & copper conductor

2 Answers  

how many types of grounding?

7 Answers  

we have one pumping station and 4.6 MW 7 no.s synchronous motors.so there is no required HT capacitor to improve power factor.But we have two no.s of 25 Mva power transformer connect to distribute the power for motors connect with 220 kv line.So i have required the HT capacitor to improve power factor at HT side i mean power transformer bus side.So please suggest how much HT capacitor banks required for same.

1 Answers  

CAN WE CALCULATE THE NEGATIVE SEQUENCE AND ZERO SEQUENCE REACTANCE OF A GENERATOR USING ONLY ITS RATED VOLTAGE, KW, PF AND SYNCHRONOUS REACTANCE??? IF YES, THEN HOW??

0 Answers  

How to find Cable size? Caterpillar generator produce (Two generators) 127*2=254 amp at 11 kv . What would be the cable size (XLPE) to supply 256 amp at 11 kv? Air or surrounding Temperature is 32 degree C. Cable will go under ground at 2.5 feet depth. Group Rating Factors is 3 cables. Clearance between cables is 7 cm. Soil Temperature (Ambient) 28o C Soil Thermal Resistivity is 1.2 K.m/W I would like to use 3 separate single core instead of using 3 core cable. Some says I should use three separate single core 120RM cables. Some says 70RM .some says 95. I m totally confused. Is there ant specific rule to determine cable size? What would be the LT cable size to flow 500 Amp current? Ifte My e mail address is ifte13@yahoo.com Anyone please send me the answer to my e mail address, i will be very glad.

1 Answers  

why we are not earthing ht cable at both the ends(sending & receiving end)?

5 Answers   Essar,

Can VFD step up to 60 Hz if it is designed to receive 50 Hz input?

3 Answers