Dynaset HG 1, Руководство пользователя, Страница: 55 / 72

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55
HYDRAULIC GENERATORS
MAINTENANCE
FAILURE
REASON CORRECTIVE ACTION
OUTPUT VOLTAGE
INSTABILITY
Instable rotation speed of
generator.
Check generators hydraulics including
automatic frequency control valve.
Make an adjustment if necessary.
Check that the hydraulic oil flow is
constant.
Check whether the hydraulic fluid flow
and pressure are not excessive. Adjust
when necessary.
Check the hydraulic motor for
possible leakage. Replace the motor if
necessary.
FAILURE REASON CORRECTIVE ACTION
LOW OUTPUT VOLTAGE
AT LOAD
The generator is being
overloaded.
Reduce the load and check the current
I (A) to ensure that the proper load is
being applied.
GENERATOR
CONSUMES
ABNORMAL AMOUNT
OF HYDRAULIC FLUID
Failure of axial sealing
of generators hydraulic
motor. External indication
- hydraulic oil outflow from
ventilation grids.
Axial sealing of hydraulic motor
broken by reason of excessive
pressure in return line (T). Rebuild
the return line (T). Maximum allowed
pressure in return line is 5 bar. Replace
axial sealing of generator’s motor.
Oil leakage from hydraulic
motor.
Hydraulic motor worn out and have to
be replaced.
GENERATOR
CONSUMES
ABNORMAL
HYDRAULIC PRESSURE
AT NO LOAD
Winding failure.
One ore more stator winding is in
short circuit. Replace generator.
A MILD ELECTRIC
SHOCK FROM
HYDRAULIC
GENERATOR
Poor hydraulic generator
grounding.
Ensure proper grounding cable
installation.
ABNORMAL NOISE
FROM GENERATOR
Bearing failure. Replace broken/worn bearing.
Broken fan. Replace broken/worn fan.