21
No. Description
13 Load break switch
14 Oil drain valve
8.2 Cover Mounted Pressure Relief
This pressure relief is used to protect the transformer when there is a severe fault for the
transformer such as internal short circuit, the cover mounted pressure relief is to release the
pressure immediately under those fault conditions.
figure 8-2 Cover Mounted Pressure Relief
A large amount of gas generated by internal faults in the transformer is discharged
through the pressure relief valve. please remove the cover locking device on the
pressure relief valve.
8.3 Expulsion fuse
8.3.1 Bay-O-Net type
Bay o net fuse is placed receives the expulsion fuse, and it is accessible from the exterior of
the tank. The expulsion fuse acts in fault cases in the secondary side of pad-mounted
transformer or for overloads higher to the acceptable for the Norm NOM-J-409 and ANSI C-
57.91. To replace the fuse from the exterior, follow the next instructions:
User Manual 8 Components and Accessories
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