Nidec LSA 49.1 Installation And Maintenance Manual

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Nidec LSA 49.1 Installation And Maintenance Manual Manual pdf 5 page image

2017.12 / p5Electric Power GenerationInstallation and maintenanceLSA 49.1Low Voltage Alternators - 4 pole3007 en -2 - TECHNICAL CHARACTERISTICS2.1 - Electrical characteristicsThis alternator is a machine withoutsliprings or revolving field brushes, woundas “2/3 pitch” ; 6 or 12-wire, with class Hinsulation and a field excitation systemavailable in either AREP or “SHUNT+PMG”version (see diagrams and AVRmaintenance manual).• Options- Stator temperature detection sensors- Space heaters- Terminal box with connector links formounting protection or measurement C.T.In order to conform to standard EN 61000-6.3, EN 61000-6.2, EN 55011, the R 791interference suppression kit is needed.2.2 - Mechanical characteristics- Steel frame- Cast iron end shields- Greasable ball bearings- Mounting arrangement: single-bearingwith feet and SAE flanges/coupling discs:twin-bearing with SAE flange and standardcylindrical shaft extension- Drip-proof machine, self-cooled- Degree of protection: IP 23• Options- Protection against harsh environments- Air inlet filter, air outlet labyrinth seals: IP 44To prevent excessive temperature risecaused by clogged filters, it is advisable tomonitor the stator winding with thermalsensors (PTC or PT100).AREP system with R 450SHUNT + PMG system with R 450T1 T2 T3T4 T5 T6Surge suppressor5+ 6-T7 T8 T9T10 T11 T12R 450Aux. windingsSTATOR : 12 wires (marked T1 to T 12)ExciterFieldArmatureMAIN FIELDVoltage referenceSTATOR : 6 wires (marked T1 to T6)T1 T2 T3T4 T5 T6Surge suppressor5+ 6-T7 T8 T9T10 T11 T12R 450PMGSTATOR : 12 wires (marked T1 to T 12)ExciterFieldArmatureMAIN FIELDVoltage referenceSTATOR : 6 wires (marked T1 to T 6)