Answer / surendra verma

Winding insulation class denotes the dielectric strenght of
the insulation material used for winding.

Winding insulation class denotes the limit of temperature
rise on load condition.

Answer / a.hanumathu

winding insulation class is related to the capability of
short ckt of winding with other conducting part like
stator.and wndg temp class is related to ability of
conducting without melting or loose of insulation.

Answer / rvg

winding insulation classification is nothing but a group of
materials arranged in the order of insulation resistivity
in terms of Kv per mm.

winding temp. class is related to temperature withstand
capability of winding insulation.

Answer / koppu chowdaiah

winding insulation gives electrical&mechanical stability to the winding. based on the temperature class in winding the insulation will be provided.suppose temperature will be increased highly due to high currents,the winding will be damage.

Answer / sridharan

winding insulation class gives mechanical &electrical
stability to the machines whereas winding temperature class
sive warning to the machine

Answer / anand

insulation strength is associated with voltage rating

temperature class is associated with currents.bcoz here due to current losses increase n so temperature

WHAT IS LIGHTNING,HOW TO CALCULATE LIGHTNING DESIGN CALCULATION?

2 Answers   L&T,

defult setting in p220 micom motor proction relay for 11kv,640kw,f.l.a.-40a,1440rpm ht motor?

0 Answers  

How to decide the rating of CBCT? We have 6.6Kv switchgear & having 50/1 cbct ,i want to know how this 50/1 A came? On what basis we decide CBCT reting?

1 Answers   Cross,

WHAT IS DGA TEST FOR THE TRANSFORMERS.

3 Answers   ABB,

Main CT ration is 400/5, meter CT ratio is open type: -/5A. What is the Multiplying factor of the meter, considering same PT ratio.

1 Answers  

how many kw = one ton air condition?

2 Answers  

Technical requirement of Copper earthing over GI earthing.

1 Answers  

We use ACB in LT and VCB in HT.But if we use VCB in LT and ACB in HT that what will be the effect on the system or any power range?

6 Answers   Honda,

Why does the rotor rotate?

0 Answers   Elin, OPTCL,

what is skin effect?

6 Answers   MPSEB,

Energy metering: On the property I am renting, the supply voltage is 2 x 110 volts. These 2 x phases enter a energy meter which then exit the meter to over head lines to my house. Question 1. The meter is single phase 240 volts but is being used as 2 x phase(2 x 110volt), is this acceptable? if not, please give me the reasons. The meter details are as follows: 60Hz 15amp Imax 100 amp Kd 3,6 Wh/R 1 fase 3 hilos Model FX 231. I think it was manufactured in Brasil From this meter, the cables run along over head aluminum conductors,I estimate the cross sectional area to be 25mm diameter, but the neutral is only about 10mm square diameter, which cover a distance of 170 meters and then terminate with an underground cable of 65 meter length, total length = 235 meters. There must be a huge voltage drop over this length. This line is protected with 2 x 200 amp aluminum fuses after the meter, there is no main switch in the distribution board. These 2 phases connect directly onto 2 busbars. Surely the neutral should be the same size as the conductors if not more? Question2. What are your thoughts about this installation, should there be better protection, is the neutral too small? During the night, the lights dim then brighten all the time, this cannot be good for my electrical appliances. In my home, I only have a small electric geyser and fridge, my stove works off gas. But when i use other appliances like the washing machine or microwave oven, the light dim. The internal wiring of this house is done with solid hard drawn copper wires and of course, they have to be under rated. I am a retired electrician by trade, but not on the metering and over head mains side, my experience is on the factory maintenance side of things. Your expertise on these matters will be greatly appreciated. Please inform me how to rectify or make any improvements Kind regards, my power bill is very expensive, so I need to know how to bring it lower. Kind regards, Brian

1 Answers  

state types of reflectors in illumination engg. ???????

0 Answers