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4.7 Fuse Installation
NOTICE
y USE bUSSMANN TPA TYPE FUSES ONLY.
y FUSES MUST CARRY A 10kA OR HIGHER INTERRUPT RATING.
Step 1. Ensure that connected loads are in the off position, then firmly insert a TPA
fuse of sufficient ampacity into the position to be fed (see Figure 12).
Step 2. Turn on the connected load.
4.8 Alarm Installation
NOTICE
WHEN DAISY CHAINING, THE ALARM MUST
bE MONITORED NORMALLY OPEN.
The TPA 250 series fuse panel has Form-C dry alarm contacts for remote alarm
monitoring. If alarm monitoring is required, (2) 8p8c (RJ-45) modular jacks are provided
for alarm connections. The (2) jacks support easy daisy chaining of panels.
The 8p8c modular jacks are located on the left side of the panel. Refer to mechanical
drawings found in Appendix A for more details.
Step 1. Plug in a UTP cable with a TIA/EIA T568B termination into the alarm jack (see
Figure 13). Refer to Table 4 for termination pinout information.
Step 2. Connect the cable to the site alarm monitoring system.
Step 3. If daisy chaining is required, connect a UTP cable with TIA/EIA T568B
termination into the second jack and connect the other end to the next panel
in the chain. Repeat this process until all panels are connected.
TAbLE 4. ALARM CONTACT PINOUT
PIN 1
PIN 2
PIN 3
Major COM
Major NC
Major NO Reserved
4.9 Installation Checklist
y Rack mount ears (19 or 23 in.)
y Ears mounted to panel and rack securely
y Chassis ground cable/lug securely tightened
y Input power cables/lugs and return cables/lugs securely bolted/connected to rear
of panel
y Heat shrink installed on cables
y Fuse fail alarm contacts wired to remote monitoring device (if required)
y Output connections secured
y Fuses sized as required for each load
y All safety covers attached
PIN 4
PIN 5
PIN 6
Reserved
Reserved
PIN 7
PIN 8
Reserved
Reserved
Figure 12. TPA Fuse Installation
Figure 13. Alarm Jacks
TPA 250 FUSE PANEL
SETUP AND OPERATION MANUAL
INSTALLATION - PAGE 7
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