[vc_row full_width=”stretch_row” default_id=”themesflat_1524534705″][vc_column][themesflat_title_section title_position=”center” title_font_size=”35px” title_font_weight=”400″ title_line_height=”48px” show_line=”1″ content_line_height=”24px” title_color=”#111111″ content_color=”#aaaaaa” title=”Services We Provide” class=”center” top_title=”One Stop For All Your Motor Needs”][/themesflat_title_section][themesflat_spacer desktop=”33″ mobile=”25″ smobile=”20″][vc_row_inner][vc_column_inner][themesflat_imagebox icon_type=”icomoon” icon_icomoon=”icon-settings2″ show_readmore=”” style=”style4″ icon_font_size=”53px” icon_size=”25%” default_id=”themesflat_1524467305″ title=”REPAIR AND REFURBISHMENT OF AC INDUCTION MOTORS”]

  • Perform these tests on the stator windings and record the results:
  • Insulation resistance and polarization index
  • Winding resistances (terminal-to-terminal resistances)
  • Rotate the rotor manually, and check for any defects in the bearings and shaft.
  • Run the motor at no load. Measure and record the currents, vibration, bearing temper- atures, and temperature rises.
  • Measure and record the rotor end play (axial and radial)
  • Dismantle the motor and remove the rotor.

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  • Clean the windings, using low-pressure steam, if they are contaminated with dust, oil, or grease.
  • Inspect the motor cable insulation for cracks, overheating, and brittleness.
  • Inspect the stator insulation for cracks, brittleness, and puffiness.
  • Inspect the slot wedges and bracing system in the stator for looseness.
  • Inspect the laminations in the stator core for looseness, damage due to rotor rubbing, localized overheating, and blockage of the vent ducts.
  • If there are no defects in the core or windings of the stator, perform these tests on the stator windings and record the results
  • Insulation resistance and polarization index tests
  • Terminal-to-terminal resistances (winding resistances)
  • DC high-potential test
  • Surge test

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  • Inspect the bearings for cracks, wear, etc.

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  • Perform a visual and a functional check for all resistance temperature detectors and thermocouples used in the winding or bearings of the motor.

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  • All defective components should be repaired or replaced.

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  • If the windings of the motor have serious damage, the motor should be rewound.

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