CLOSED, STOPPED AND UNPLUGGED MACHINE

• Measure partial discharge off-line

• Measure insulation resistance i.r
  according to UQ602011C standard

• Determine polarization index i.p.
  according to ieee std 43-2000 standard

• Measure tangent of loss angle tan δ in winding insulation and its variation in δ tan δ
  based on voltage: 0.2 – 0.4 – 0.6 – 0.8 – rated voltage

• Measure μf capacity of electrical windings respect to the mass,
  compared with same voltage present in the previous point

• Test ground voltage
  according to UQ602010C standard

• Test balance of phases through ohmic resistance
  according to UQ602012C standard

• Test balance of phases through impedance z ohm
  according to ieee std 56-1977 standard

• Internal check up through endoscopy with fiber optic lighting

• Check up motor space heaters and thermoelements

 

ROTOR INSIDE STATOR

• measure insulation resistance i.r
  according to UQ602011C standard

• check total static ohm resistance
  according to UQ602012C standard

• check total static z ohm impedance
  according to ieee std 56-1977 standard