Vertiv | NetSure 7100 Series -48V DC Power System Installation Manual (IM582127000) | Rev. BB
Installing Bullet Nose Type Circuit Breakers
CAUTION! A circuit breakers and fuses can be used without a space provided the continuous operating
current in each 100 A device does not exceed 64 A. A 175 A or greater circuit breaker shall have an
empty mounting position between it and any other overcurrent protective device.
Refer to SAG582127000 for any other restrictions.
Refer to the following procedure and install appropriately sized bullet nose type circuit breakers into the proper
mounting positions in the distribution cabinet.
Procedure
NOTE!
Refer to
Figure 25
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. Ensure that the circuit breaker is in the OFF position and is of the correct rating. Orient the circuit
breaker as shown in Figure 25. 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.
3. Record all circuit breaker sizes on the label provided on the shield.
4. 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 25:
Installing a Bullet Nose Type Circuit Breaker
In
sert th
ese termi
nals
into
corresponding so
ckets
on dis
tribution panel.
Longer Si
de
to t
he Bottom
Shorter Side
to the Top
Lettering on
handle must be
right side up.
T
urn o ff