A Bay-O-Net fuse is not recommended for fault closing.
Do not re-energize suspected failed equipment; serious
personal injury may result. Internal fault conditions can
cause the transformer to rupture or the cover to blow off.
Always energize transformer from a remote upstream
source.
When replacing a blown fuse, the feed circuit should be
opened and closed from a remote location. The Bay-O-Net
fuse should be replaced using the procedure described
below and re-energized from a remote upstream source. If
equipment is re-fused while energized, the fuse could close
in on the system’s maximum fault current. Any equipment
that has a suspected failure should not be closed in with
the fuse.
For additional information on Eaton’s Cooper Power series
Bay-O-Net fuse assembly, including loadbreak ratings,
refer to catalog section CA132015EN, Service Information
MN132003EN, and Service Information MN132002EN.
Current sensing, dual sensing, dual element, and high
ampere overload links can be used in a Bay-O-Net fuse
assembly. For additional information on these links, including
interrupting ratings, see catalog sections CA132009EN,
CA132010EN, CA132011EN, and CA132007EN respectively.
Bay-O-Net fuse re-fusing instructions
Remove fuse holder
Step 1 - Relieve tank pressure.
Use a hotstick to perform the following steps:
1. Pull ring on pressure relief valve to open valve. Hold the
valve open for 30 seconds after pressurized air can no
longer be heard hissing through the valve.
2. Close pressure relief valve and wait 30 seconds.
3. Pull pressure relief valve open. Hold the valve open until
hissing stops, and then for another 5 seconds. Pulling
the valve open again allows any residual pressure to be
released from tank.
Step 2 - Unlock fuseholder and break seal.
Use a hotstick to perform the following steps:
1. Stand to one side of the Bay-O-Net being removed.
2. Attach hotstick to fuseholder eye.
3. Twist hotstick to unlock fuseholder (see Figure 9).
4. Turn fuseholder 90° in the Bay-O-Net housing to break
seal between seal gasket and Bay-O-Net housing (see
Figure 10).
Step 3 - Draw fuseholder out.
Use a hotstick to perform the following steps:
1. Draw fuseholder out quickly 8 to 10 inches to interrupt
load (see Figure 10).
2. Wait several seconds for fluid to drain from fuseholder.
Step 4 - Remove fuseholder from Bay-O-Net housing.
1. Remove fuseholder from Bay-O-Net housing.
2. Wipe off fuse cartridge holder and fuse cartridge (see
Figure 11).
Figure 9. Unlock and turn fuseholder 90° in the Bay-O-
Net housing.
CAUTION
If tank pressure has not been released, the fuse holder
may be forced out of the Bay-O-Net housing. Maintain
control of fuse holder at all times.
CAUTION
If fluid is coming out of the Bay-O-Net assembly, open
the pressure relief valve again to equalize pressure
inside the tank.
8
Three-phase pad-mounted compartmental type installation and maintenance instructions
MN202001EN August 2015