Answer / a.sripathi reddy

In addition to above answer,Cable rating /size selection
based on 1.voltage drop 2.Voltage level 3.Cost

Answer / santosh

Cable Sizing to be selected based upon many factors, some of
these are:
1. Total connected load to be considered with 25% spare
and maximum demand current in AMPS to be calculated. This
will be maximum ampacity.
2. Derating factors such as length of cable to be laid,
Type of installation of cable in medium ( In air, Duct,
Directly buried in earth).
3. Thermal resisivity of soil at 2.5 deg C/m, correction
factor for cables, no of cables laid.

Answer / murad

cables are used for carrying power to desired
destinations.manufacturers of cables provide apmere rating
tolerance for each cable with their booklet.for someone's
use one should follow the tables and desired amperer and
corresponding cable.

Answer / ritesh khimani

in addition to above answer i think distance upto which
cable has to csrry the power and also atmospheric condition
of the site at where the cable will be installed is also a
very important factor.

how we can select a transformer based on a particular load. suppose we have 4 motors of rating 40 h.p , 50 h.p, 80 h.p & 100 h.p. then what rating of transformer we can select. urgent. pls reply

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function of soft starter .

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in 6.6 kv vaccum circuit breaker vaccum bottole vaccum capacity ????

0 Answers   Divis Laboratories,

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what is the meaning of 5% droop or 7% droop in AVR?

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what is the contact resistance of Air circuit breaker??

1 Answers  

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How to calculate pitch, gauge of winding wire, and No. of turns for 30HP, 3 phase, 4 poles 50Hz, 380V induction motors

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What is difference between metal clad & metal enclosed switchgear?

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What is meant by cold loop test in instrument

0 Answers   Transnet,

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We all have seen transmission and Distribution lines In transmission lines the voltage is high and current is low(to reduce I^2r loss) and in distribution lines voltage is low but current is high however the size of transmission wires is bigger than that of distribution wires even though the amount of current carried by the distribution lines is more than that of transmission lines why?

4 Answers  

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What is power factor? Whether it should be high or low ? why?

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How we can determine short circuiting current any plant and for example a plant which power generation is 415 volts and plant load is 500 kw.

0 Answers  

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PLS SEND THE RRB CHENNAI MODEL QUESTION PAPER my email id is ganesan98655@rediffmail.com

0 Answers   RRB,

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