Siemens 1D Series - 4.5.3 Electric cause II

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Product documentation 1D 3.8.en Rev. E, 10/13 page 35/42
4.5.3 Electric cause II
Breakdown
Possible cause Remedy precaution
Generator voltage < UN
Uneven load distribution
during parallel operation
Difference of voltage
among individual phases
Overheating
Part of winding is
overheated
Fluctuation of output
•
Overload Reduce load
•
Break of outer wires Check outer wires
•
Short-circuit of stator
winding
Measure winding and insulation
resistance, consult producer and
repair
•
Overload Reduce load
•
Uneven load Adjust load
•
Short-circuit of stator
winding
Measure winding and insulation
resistance, consult producer and
repair
•
Fluctuation of turning
moment
Check driving machine
•
Potentiometer of statics is
reset
In generator equipped with statics
module-set potentiometer of
statics according to operational
instructions
•
Break or short-circuit of lead
from statics current
transformer T to statics
Eliminate short-circuit, in case of a
break check current transformer
Tab. 11 Electric causes II