Annual Report 2011-2012

Annual Research Report 2011-2012
Along with the manufacturing process, NRI has fulfilled all required quality control
tests during the manufacturing stages such as those related to the materials used and noload
electrical tests which might be listed as below:
• Tests carried out on insulators, steel used in shafts and copper in windings.
• Insulation tests including: pre-manufacturing over-voltage tests on stator coils
and insulation resistance tests on both stator and rotor.
• Supervising the stator/rotor cores manufacturing process and fulfilling the
required tests on nominal magnetic flux in stator cores.
• No-load, speed and temperature rise tests on windings and bearings.
Pre-installation insulation resistance test on stator
coils
Nominal magnetic flux test
Installation of stator winding coils
Over-voltage test after installing the stator winding
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