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Fused Retrofill Breaker
Danger
There are two types of fused breakers; WPF-08, 800 ampere frame and WPF-16, 1600
ampere frame. Except for the open fuse lockout device and the integrally mounted fuses
on the upper studs, the WPF-08 and WPF-16 breakers are identical to the unfuse WP-08
and WP-16 models. Overcurrent trip devices are the same for both types.
39 - Fuse size and mounting
Figure 73
Table 6 lists the range of fuse sizes available for these breakers. The Class L fuses are
mounted as shown in Fig.51. Other than the 800A size, which has a single mounting hole
per tang, each Class L fuse tang has two holes sized for one-half inch diameter bolts.
Class J fuses rated 300 thru 600A have one mounting hole per tang. The 300, 350 and
400A sizes require copper adapter bars per Fig. 52. All 1/2-13 fuse mounting bolts should
be torqued to 200-350 in.-Ib. The 5/8-11 bolts which attach the C shaped fuse adapters
to the breaker studs should be torqued to 300-525 in.-Ib.
71
Ensure only qualified personnel install, operate, service, and maintain all electrical
equipment.
lt must be ensured that the supply power to the
compartment is turned off/ compartment is
denergized for all the incoming and outgoing
circuits of the LVS prior to any work being
conducted on it..
During the installation and related work on the
equipment, it must be ensured that the operator
is using the prescribed PPE for the specified
tasks
TYPICAL MOUNTING CLASS L FUSES
C
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