COMEM CRS IEEE Manual De Instrucciones página 7

Troubleshooting
Fault
Oil loss from the flange of the bushing
There are hissing noises at the flange
There are hissing noises at the
connection in air
Electric discharge at the air end outside
the bushing
Abnormal distribution of temperatures
in the bushing.
Table 4
If the problem is not mentioned in the cases above, please contact COMEM
(S.R. 11 Signolo, 22 36054 Montebello Vicentino (VI) -Italy Tel +039 0444 449311
E-mail: customerservice@it.comem.com
Physical phenomenon
Leakage
Corona effect
Corona effect
Electric discharge
Thermal effect
Solutions
Tighten the stud bolts to the recommended torque of 25 Nm.
Check correct positioning of the gasket.
Check the surface of the tank to ensure no uneven parts or
excessive roughness.
The ground wire is not grounded.
The ground wire is not connected correctly because the contact
surfaces are insulated (i.e. check whether the contact surfaces are
painted).
Check whether the conductor connected to the bushing has any
edges that cause increased electric field density.
Check the connection at the air end of the bushing.
Check the connections applying the torque recommended in Table 3.
Check that the section of the conductors for connection to the
bushing is correct
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