Table 1.
The DC applied during the insulation resistance IR testing (Guidelines from IEEE Std. 43).
Table 2.
From the IEEE Std. 43, the overall minimum IR values in MΩ at 40 °C.
Table 3.
The recommended P.I value based on the IEEE standard [19].
Fig 1.
Currents during A. C. voltage supply and dissipation factor (Tan Delta) angle.
Table 4.
Dielectric dissipation factor (maximum value) of single bars and coils in new condition with guard ring electrodes up to a rated voltage of Un = 21 kV [22].
Fig 2.
Sources of partial discharge in a stator winding insulation, as in (EC&M Oct.
18, 2018).
Table 5.
Review summary on HV Motor Testing Technique.
Table 6.
Parameters, weightage for respective parameters, scoring, and their description.
Table 7.
Proposed criteria for conditional Factor CF calculation.
Table 8.
Description to examine the physical condition of the motor.
Table 9.
Summary of the weightage, scoring and scoring description.
Table 10.
Summary overall proposed HV Motor Health Index assessment.
Fig 3.
The proposed overall health index OHIM assessment of the HV motors based on electrical testing and conditional factors.
Table 11.
Comparison of existing HV motor HI assessment approaches and OHIM.
Fig 4.
GM-151B is an HV Motor used to run pump G-151B, the Boiler Feed Water name Plate Details.
Table 12.
GM-151B Maintenance Record Obtained from Case Study for Health Index Calculations.
Table 13.
Results converted into Health Index scoring table for motor GM-151B.
Table 14.
GM-151B Maintenance Record Obtained for Conditional Factor Calculations.
Table 15.
Results Converted into Conditional Factor Scoring Table for GM-151B.
Fig 5.
CM-01004 is an HV Motor used to run C-1004, Nitrogen Off Gas Compressor name Plate Details.
Table 16.
CM-01004 maintenance record obtained from case study for health index Calculations.
Table 17.
Results converted into Health Index scoring table for motor CM-01004.
Table 18.
GM-151B maintenance record obtained for conditional factor calculations.
Table 19.
Results converted into conditional factor scoring table for GM-151B.
Fig 6.
GM-0651B is an HV Motor used to run pump G-06501B, Sea Water Pump (a) Site Picture of HV Motor (b) Name Plate Details.
Table 20.
CM-01004 maintenance record obtained from case study for health index calculations.
Table 21.
Results converted into Health Index scoring table for motor CM-01004.
Table 22.
GM-151B maintenance record obtained for conditional factor calculations.
Table 23.
Results converted into conditional factor scoring table for GM-151B.
Fig 7.
The OHIM Results patterns of HV Motor GM-151B (a) HI tests assessment (b) Conditional factor CF calculation.
Fig 8.
The OHIM Results patterns of HV Motor CM-01004 (a) HI test assessment (b) Conditional factor CF calculation.
Fig 9.
The OHIM Results patterns of HV Motor GM-06501B (a) HI test assessment (b) Conditional factor CF calculation.