Home Electrical Engineering Forum General Discussion CALCULATING POWER LOSSES IN A TRANSFORMER,VFD AND MOTOR.

This topic contains 1 reply, has 2 voices, and was last updated by  pradeepkumar 3 weeks, 4 days ago.

Viewing 2 posts - 1 through 2 (of 2 total)
  • Author
    Posts
  • #16686

    nvrsrinivas100
    Participant

    Dear sir,

    In our cement plant,We are having a RABH fan for which we connected a 730KW motor.The details of the motor are Make:Crompton Greaves Limited. KW:730. Volts:690V.Rotor Amps:0.Rotor Voltage:0. RPM:990. Amps:730A Efficiency:95.8%.Frame:BTPC500F .Year of Mfg.03/2009.

    This motor is connected to a ABB VFD.ACS800-04-1060-7. 730KW.

    The power is fed to VFD through a transformer.The details of the transformer are Make:PETE Transformers.KVA:1000.HV voltage:6600.LV1 voltage:690V.LV2 Voltage:690V.HV Amps:87.5A.LV1 Amps:418.4 Amps.LV2 Amps:418.4A, 3Phase,50Hz,Connection Symbol:DYN11d).Impedance:4.48We have measured KW at different points.KW at HT braker of Transformer:726.2 KW.KW at the input to VFD:695KW.KW at the output of the VFD:647.65KW.Motor RPM at that time=925.8RPM.We want to increase motor speed further ,at least to 960-970 RPM.But,we are not sure whether motor withstands or not.The power meter at the transformer incoming is showing 726.2 KW.Please help me as my production can be improved if we can run the motor at higher speeds. Thanks,NVRSrinivas

    #18439

    pradeepkumar
    Participant

    The loss in a transformer compares the input, or primary power, to the output, or secondary power. Most transformer data show their input and output voltages and the current ratings of both sides.

Viewing 2 posts - 1 through 2 (of 2 total)

You must be logged or registered in to reply to this topic.

Electrical engineering Community is proudly powered by WordPress
Entries (RSS) and Comments (RSS) and license Creative Commons License