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we are operating GE frame 9 gas turbine. During 88QE DC motor availability checks during startup, the current rises below set point for the high current set point alarm which is normal. But when the speed begins to build to normal, the current drops to 12amps and gradually builds to 28amps AND REMAINS THERE which is below 30amps limit for low limit alarm set point. This prevent startup of the turbine.
I have checked the starting resistor the readings are ok. I have checked the transducer it is ok. Please can it be brushes, commutator, field, or armature winding problems? The motor type is LSK1804 cvl,75KW,125VDC.
Please help.
I have checked the starting resistor the readings are ok. I have checked the transducer it is ok. Please can it be brushes, commutator, field, or armature winding problems? The motor type is LSK1804 cvl,75KW,125VDC.
Please help.