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Step 5 Check fluid level.
• Refer to the equipment manufacturer’s instruction book for correct oil level.
• The fluid level in the transformer should be approximately at the base of the protruding
plastic threads of the Bay-O-Net housing at 25° C (77° F) with the transformer on a level
surface. (See "figure 8-10 Check fluid level").
figure 8-10 Check fluid level
Inadequate oil in the tank can result in a dielectric failure of the transformer
causing an outage, damage to the transformer, fire or explosion. If the transformer
has excess oil, spillage may result when the Bay-O-Net fuse holder is removed.
Step 6 Install fuse holder
• Pull pressure relief valve, keeping it held open until audible pressure evacuation stops
and then hold open for another 5 seconds.
• Attach end of fuse holder assembly to hot stick and insert holder assembly firmly into the
Bay-O-Net housing.
• Twist the locking handle so that the latch engages the Bay-O-Net housing’s shoulder and
the steel washer seats tightly on the end of the tube of the Bay-O-Net holder assembly.
(See "figure 8-10 Check fluid level").
The last 6 to 8 inches (152 to 203 mm) of movement are critical to the Bay-O-Net
successfully switching the transformer on. Movement in this region should be as
fast and smooth as possible. If the movement is slow or interrupted, damage to the
Bay-O-Net assembly could result.
Visually inspect the entire fuse holder assembly to be sure it is installed correctly.
Ensure that the fingers of the latch are entirely under the latch ring of the housing.
This ensures that the contacts inside the assembly are fully engaged. If the
contacts are not fully engaged, damage and eventual failure of the fuse holder and
cartridge will result.
User Manual 8 Components and Accessories
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