Submitted Questions

Relay setting details

How to set the various setting value of a relay depend upon the electrical motors ?

Answered by: Nishant Choudhary on: Jun 3rd, 2011

its very simple first note the current rating of the motor on the name plate then adjust the current setting just above the name plate motor of the motor

Calculation of electrical cable size

Will u please give the formula, for selection of cable sizing (both copper and aluminium) depend upon the electrical loads...

Answered by: mahmoudp1 on: May 3rd, 2012

It depends on a lot of factors like current density for mm^2 temperature is the cable on cable trays or buried or inclosed in PVC is that a 3 phase cable multicore or what and also depends on the voltage but in general making a current density 2 A/mm^2 for copper for simple applications is good.

Answered by: Susanta ku.dwivedi on: Aug 16th, 2011

First we calculate the amp rating of the equipment.for cu we take 2.5A & for alu we take 1.5 to 1.7A for 1sqmm cable.