COMEM CRS Manual De Instrucciones página 8

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 5
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: [email protected]
8
Physical phenomenon Solutions
Tighten the stud bolts to the recommended torque of 30 Nm.
Leakage 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.
Corona effect
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
Corona effect
increased electric field density.Check the connection at the air end of the bushing.
Check the connection at the air end of the bushing.
Check the studs length (MAX 40 mm). Verify the presence of stud sharp edges
Electric discharge
and remove them (a possible solution should be to apply a second nut to avoid
the sharp edges in the top part of the studs (for more details contact COMEM)
Check the connections applying the torque recommended in Table 2 and 3.
Thermal effect
Check that the section of the conductors for connection to the bushing is correct
COMBINED RESIN SILICON BUSHINGS CRS