Answer / appar

above mentioned is ok. we should take distance also in an
account bcoz if there is a long length cable voltage drop
is also increase for that we increase the sqmm of the
cable..

Answer / sreenu

Based on KW/HP value the current rating can be caluculated
and based on current rating of Mains & cable size can be
caluculated.

for example.
HP of the motor is :A HP
KW of load is :A HP/735.5*Efficiency(E).
Generally eddicieny of the motor can be asuumed 0.8 to 0.9
Current(C) is :A HP/735.5*E*(1.73*V* cosQ)
Cos Q generally asumed as 0.8 to 0.9

If the value of current is C, the current capacity of cable
reuired is Appx. 1.5*C.

Based on cable catalogue provided by the cable manufacturer
the size of the cable can be selected.

For eample. If you use al. cable, the size of cable is
bigger than copper cable.

Rating of mains: 1.5* C, but fuse arting is C only.

how will you find out the fuse failure by remote operation?

1 Answers  

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Anybody tell me about modbus hex address of l&t trivector meter er300p??I want to read voltage,current,kwh etc via rs485...If anybody have a manual then send on my mail..Brijeshmodi18@gmail.Com

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what is the relation between currebt & voltage.

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Advantages of using bundled conductors ?

3 Answers  

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Since phi is the angular displacement between V & I, then why we use phi in power triangle ie. when showing active, reactive & apperent power in triangular manner & if it is ok then where is V & I in the triangle.

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Why do u join toreent power ?

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Differentiate between ideal and non-ideal voltage sources?

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how many types of ACB breakers, describe briefly..?

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A TRANSFORMER 440/400V,DELTA/STAR CONNECTED.THE NEUTRAL CONNECTED WITH GROUND CABLE THAT IS DIRECTLY CONNECTED TO THE PANEL,FROM PANEL IT IS CONNECTED EARTH PIT.IS IT RIGHT? IF IT IS RIGHT LEAKAGE CURRENT AFFECTED.SECONDATY IS PROTECTED WITH EARTH LEAKAGE RELAY.

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Importance of fault current in power transformers and how to monitor the same? How is it different from winding temperature?

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Is it possible to obtain 480v or 550v in single phase output by giving the input to 230v to a single phase torodial type transformer without using a stepup transformer?

0 Answers  

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