On-line measurements fOr generatOrs and large mOtOrs

The condition of the electrical insulation system is the most important factor as to the life time of generator, motor and trans-former. With proper measuring techniques, defaults can be predicted. Measurements are performed on-line during operation or off-line during outages.

• Partialdischargemeasurementtodetermineconditionoftheinsulation system of stator winding

• Shaftvoltageanalysistodetermineconditionof rotor winding and excitation system

• Groundingshaftvoltageandcurrentanalysisto determine harmful leakage currents

• Rotorwindingimpedancevsrotationspeedandrotorfluxtodetermine condition of rotor winding

Off-line measurements fOr generatOrs and large mOtOrs

• Partialdischargemeasurementforstatorwinding, also slot specific measurements

• Lossfactormeasurements• Insulationresistanceandwindingresistance

measurements• Highvoltagetests• Statorsteelcoretest;ELCID

Electrical condition management performed both on-line during operation and off-line during outages extends the life time of the equipment and guarantees its performance.

Fortum Power and Heat Oy, Turbine and Generator SolutionsP.O.Box100, 00048 FortumKeilalahdentie 2-4, Espoo, Finlandwww.fortum.com/powersolutions

Vesa Kylmälä +358 50 454 6323 vesa.kylmala@fortum.comOlli Lindgren +358 50 453 4763 olli.lindgren@fortum.com

2/20

18

electrical Condition management

COnditiOn mOnitOring fOr eleCtriCal mOtOrs

For high performance The condition monitoring of electric motors, at power plants and industrial facilities, guarantees their performance in all condi-tions.Ourconditionmonitoringconceptcoversseveralhighlyspecialised monitoring methods starting form critical analysis, planning of condition management programme, commissioning measurement, condition audits and condition management out-age test during operation.

Our concepts enable the execution of different condition moni-toringactionsfromroutinecheck-upstoadvancedspecialmeas-urements, both mechanical and electrical, and failure analysis.

COnditiOn mOnitOring fOr transfOrmers

For lower risks and longer life• Weperformelectricalconditionmonitoringoftransformers

for detecting and follow-up of failures and predicting the consequences and results.

• Ourconditionmonitoringcoverselectricalwiring,core,coiland conductor, the solid paper insulation and insulation oils.

• Wealsoperformcommissioningmeasurementsandexpertservicesforfactoryacceptancetests.

The regular condition monitoring analysis and optimised main-tenance decrease the transformer failures and the risks for opera-tion outages and lengtden the life cycle of transformers.

Benefits • Longer life of the equipment• Guaranteed performace of the equipment• Reduction of failures• Lower risks for operation outages