Nidec Leroy-Somer TAL 042 Installation And Maintenance Manual

Also see for Leroy-Somer TAL 042: Installation and Maintenance

Contents

Nidec Leroy-Somer TAL 042 Installation And Maintenance Manual Manual pdf 16 page image

162019.04 / kElectric Power GenerationInstallation and maintenanceTAL 042Low Voltage Alternator - 4 pole5223 en -4.4 - Mechanical defectsFault ActionBearingExcessive overheating of one orboth bearings(bearing temperature 80°C abovethe ambient temperature)- If the bearing has turned blue or if the grease has turnedblack, change the bearing.- Bearing not fully locked (abnormal play in the bearing cage)- End shields incorrectly alignedAbnormaltemperatureExcessive overheating ofalternator frame (more than40° C above the ambienttemperature)- Air flow (inlet-outlet) partially clogged or hot air is beingrecycled from the alternator or engine- Alternator operating at too high a voltage (>105% of Un onload)- Alternator overloadedVibrationsToo much vibration - Misalignment (coupling)- Defective mounting or play in coupling- Rotor balancing fault (Engine - Alternator)Excessive vibration and hummingnoise coming from the machine - Phase imbalance- Stator short-circuitAbnormalnoiseAlternator damaged by asignificant impact, followed byhumming and vibration- System short-circuit- MisparallelingPossible consequences- Broken or damaged coupling- Broken or bent shaft end- Shifting and short-circuit of main field- Fan fractured or coming loose on shaft- Irreparable damage to rotating diodes/AVR, surge suppressor4.3 - BearingsThe bearings are permanently greased Approximate life of the grease (depending on use) = 20,000hours or 3 years.