Answer / minal

150/20 is the rating of voltages indicated on the surge
arrester.
It means that the surge arresters step down the high
voltage of 150 to 20.

Answer / ashish

I Am Not getting u r Question Actually The Surge Arrestor
For Medium & High Voltage Substation is as
Voltage Rating Of LA ( KV )= 0.8* LINE Volgage of the
Substation.

here 0.8 is earthing coefficent factor for solidely
grounded system.....

Answer / k.p.sharma

It's known as VARIASTER and 150 is supply voltage across it
we can connect and 20 is diameter in mm since Variaster is
in round in shape.

Difference between induction motor and synchronous motor? i Think Synchronous motors operate at synchronous speed (RPM=120f/p) while induction motors operate at less than synchronous speed (RPM=120f/p – slip). Slip is nearly zero at zero load torque and increases as load torque increases am a right pls guide & send Other Comments

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