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Dear All, Anybody can help me to find dioda siemens ssi k28 90 s4 08 datasheet ? Thnks

Thanks Waross, These my generator nameplat Marine Generator Type,Varistor and Rotating dioda has not been replace because already check and good condition, any 3 Unit Generator same type,parralel operation. Thnks for Your information

Thanks waross, every start up the current exciter up down 2-7 A samotimes until maxium current 10 A,but after running maybe around 10 Minutes the hunting Slowly up down, i megger winding using voltage 500 V, Thnks

Thnks waross, need to know,Winding Exciter already rewinding and insulation resistance is 100 M Ohm, whats normal value for resintance rotor winding and stator winding Exciter ?

Thanks Scotty I'am Already Check for the rotating dioda 6 Pcs ,all good condtion

Thnks Waross, I 'am Already check for the Prime mover factor when running test without load ,the RPM Stable AVR replace using Battery it should be stable for the output voltage, but Not with my generator

Thnks David, Because when no load& with load condition the voltage main stator/output Unstable and i see the current and voltage excitation unstable

Dear All, Please advice me,I have problem with my generator.the current excitation hunting around 2-7 A, I 'am already inject the exciter using 12 V battery and disconected source exciter from AVR but the voltage remains unstable help me please