Answer / pswin

The purpose of insulation resistance tester is to test the condition of insulation. On three phase motors, we need to do the insulation test between winding to windings and windings to ground. Before the testing, we need to take out the connections(star or delta). Choose 500 V scale on meter and proceed to test.Full scale will be 100 Mega Ohm. Minimum will be 0.5 Mega Ohm and if lower than this result, motor cannot be used.

Answer / lenovouser

Very simple. Measure ir between

r-y,y-b, b-r r-e,y-e,b-e

We have laid the single core Armoured cable 7 nos ( 2 each phase & 1 neutral ) to cater our electrical load . the issue is though we have Glanded the cable both the end also givan the earthing to the panel both the end we are facing a heavy sparking at the gland side. what could be the reason.

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WHAT IS THE CURRENT CARRYING CAPACITY OF 2.5/3 CORE HI TUFF CABLE,WILL IT SAFLEY CARRY 8.6 AMPS OVER 120 METRES,CAN YOU ALSO ANSWER WITH FORMULA FOR WORKINGS OUT ,THANK YOU 3RDYR APPRENTICE.

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Reduction in supply voltage by 10% will change the torque of the motor by ___.

1 Answers   UGVCL Uttar Gujarat Vij Company Ltd,

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