37
8.1.2 Brushes
Check the free move of the brushes. Probably, it is required the replacement of the brush.
Check the contact surface is smooth. Probably, it is required the replacement of the Variac.
Check the pressure over the winding through the spring is correct. Probably, it is required the
replacement of the brush spring.
In case it is needed to take actions in an equipment, call to our Service and Technical
Support.
8.1.3 Maintenance for Oil Cooled stabilizer
SR.
NO.
Inspection
Frequency
Items to be inspected Inspection Notes
Action reqd. if inspection
shows
unsatisfactory
conditions
1
Monthly
i. Oil level in SVS
ii. Connections
Check Oil level
Check tightness
If low, top up with dry
oil. Examine SVS for leaks If
loose, tighten
2
Quarterly
i.
Terminals
ii.
Oil level in SVS
Examine for cracks and dirt
deposits.
Clean or replace
3
Half-yearly
Casketed
Joints,
Gauges and general
paint work
Check of moisture under
cover inspects.
Improve ventilation, check
oil.
4
Yearly
i. Oil in SVS
ii. Megger Value
Check for
dielectric Strength
More than 10Mohm
Take suitable action to
restore quality of oil. If value
is less than 10Mohm,
