Vertiv™ NetSure™ 7100 Series -48 VDC Power System User Manual
Replacing a Bullet Nose Circuit Breaker
Procedure
NOTE!
Refer to Figure 5.3 as this procedure is performed.
1. Open the distribution cabinet’s front door by turning the latch in the counterclockwise position (system’s in a relay rack), or
open the system’s enclosure door.
2. Operate the defective circuit breaker to the OFF position.
3. Gently rock the defective circuit breaker up and down while pulling firmly outward until the breaker is free from the
distribution panel.
4. Ensure that the circuit breaker is in the OFF position, and is of the correct rating.
5. Orient the circuit breaker as shown in Figure 5.3. Insert the terminals on the rear of the circuit breaker into their
corresponding sockets on the distribution panel. Ensure the alarm contact on the back of the circuit breaker makes contact
with the alarm terminal on the spring strip. Push distribution device in firmly until fully seated in the distribution panel.
6. Operate the replacement circuit breaker to the ON position.
7. Verify no Circuit Breaker Alarms are active.
8. Close the distribution cabinet’s front door and turn the latch clockwise to secure the door (system’s in a relay rack), or close
the system’s enclosure door.
Figure 5.3 Replacing a Bullet Nose Circuit Breaker
I
ns
ert these terminals
into
corresponding sockets
on d
istrib
uti
on panel
.
Long
er Si
de
to the Bottom
S
hort
e
r S
id
e
to
th
e
Top
Lettering on
handle must be
right side up.
Turn o ff
before installing.
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