Answer / dr. surekha

Bolts are observer on the cover. these bolts are used to
hold poles. where as AC motors have smooth surface.

Presence of commutator at one of the end is s second
difference.

Answer / umang

1.For the same rating of motor , size of DC machine is
larger than AC machine
2.DC machine is identified by commutator
3.DC motors contains brush arrangement which sq.cage motor
is not having .

Answer / ankamsreekar

1.All DC machines are can be identified with commutator.

2.By seeing the cooling arrangement. since MOST of the DC
machines are provided with air blower for cooling. in case
of the AC machine end fan is provided.

Answer / karthick

dc machine can be identified by commmutator and bold net
arrangement


ac an be identified by slip ring or brush arrangement

Dear Sir/Madam, I have one questions we have three steam turbines and one Gas turbine and our industry linked with the public network, we have protection system one of the protection is reverse power we can export just four MW only i would like to ask about how to calculate the reverse power. Thank you in advance best regards

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