Answer / sheikh

this is not possible that without any reason motor going to
be off . your star delta control or power circuit may be
wrong other wise motor may be faulty.

Answer / ashok

Control circuit wire is loose conection..
Check the control circuit wire,in adanblock and
Coil side...

Answer / sl singh

May be main supply is cut

Answer / zeeshanakbarz

it can be off on process interlock.

Answer / shiva

check the olr its may trip inside the panel board..

Answer / dinesh kumar

check the load amps of the motor and bearing conditions of the motor and the olr current settings and check the terminal loose connections

Answer / sakthivel k

Check the load current there may be a chance due load side issues. Also check for the motor noise is there any noise in bearing / housing. You may also check the load coupled/connected with this drive.

Answer / julhash ali ahmed

Check the relay capacity. Motor may be stakes.Relay range will be 14 to 18

The neutarl to earth voltage in system is 7volts on Electricity power but it lowers to 1.3volts when load transfered to DG power.what may be the reason.

3 Answers  

Dear Respected sir how to test ABB REX521 protection relay by relay tester.

1 Answers  

which is best ac or dc

3 Answers  

in dc suppy frequency is zero why? if dc frequency is zero how to exist dc transients and ac transients

1 Answers   Siemens,

Why Capacitor & ignator used in MH lamp

2 Answers   Bell,

what is the difference between ac and dc?which one is more efficient?and what r their advantages

1 Answers  

How relay coordination has to be done? what are the inputs are required for this? Please explain this with calculation method?

1 Answers   Elektrotek,

can u light up bulb with out useing neutral

12 Answers  

what condition there autotransformer will fail?

2 Answers  

what is the function of generator exciter

11 Answers   NTPC,

give me a clear defination of inductance,and how can u calculate inductance of a motor

1 Answers  

acsr dog conductor specification

1 Answers