Siemens 1D Series - 4.5.2 Electric causes I

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Product documentation 1D 3.8.en Rev. E, 10/13 page 34/42
4.5.2 Electric causes I
Breakdown
Possible cause Remedy precaution
Generator voltage < UN
UN
cannot be set by means
of potenciometer VOLT
Gen
erator voltage app.0,1
UN (remanent voltage)
Generator voltage >1,1 UN cannot be set by means of
control device
Outside control device
with no function
Current and voltage
drifting
•
Too high number of speeds Check speeds of drive
•
Too low number of speeds Check speeds of drive
•
Oscillation of number of speeds Check speeds of drive
• •
Defect on rotating rectifier
Check diodes, exchange diode
module
•
Defective varistor or diodes Exchange varistor or diodes
•
Break in circuit Check wires
•
Break in regulator feeding
Check wires from auxiliary
winding to regulator
•
Defect on fuse F1 Exchange fuse
•
Break in exciting circuit
Check wires from regulator to
exciter
• • •
Defective voltage regulator Exchange regulator
•
Stability potentiometer reset
New adjustment of
potentiometer, stability according
to operational instructions of
regulator
•
Frequency potentiometer reset
New adjustment of
potentiometer, frequency
according to operational
instructions of regulator
•
Breakdown in circuit of planned
values, short-circuit in leads
Eliminate short-circuit
• •
Breakdown in circuit of planned
values, interruption in leads
Eliminate interruption
•
During operation of
potentiometer of planned
values bridge is missing
Input bridge or attach external
potentiometer with planned
value
Tab. 10 Electric causes I