
NetSure
™
-48V DC Power System
User Instructions, UM582127000 (Issue AD, January 20, 2014)
Spec. No: 582127000
Code: UM582127000
Model No: 721
NPBB
Issue AD, January 20, 2014
[23]
Replacing a Bullet Nose Circuit Breaker
PROCEDURE
Note:
Refer to
as this procedure is performed.
1.
Open the distribution cabinet’s front door by turning the
latch in the counterclockwise position.
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
. 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. Turn the latch
clockwise to secure the door.
Figure 14.
Replacing a Bullet Nose Circuit Breaker
Replacing a TPH Fuse
PROCEDURE
Note:
Refer to
as this procedure is performed.
1.
Open the distribution cabinet’s front door by turning the
latch in the counterclockwise position.
2.
Remove the fuse carrier from the mounted fuseholder
body by grasping its handle and pulling straight out.
3.
Remove the open fuse from the fuse carrier and replace it
with the same type and rating.
4.
Push the fuse carrier securely back into the mounted
fuseholder body.
5.
On the distribution panel, locate the open alarm fuse
associated with the TPH fuse being replaced. Replace the
alarm fuse with the same type and rating. Ensure that a
plastic safety cover is installed on the alarm fuse.
6.
Close the distribution cabinet’s front door. Turn the latch
clockwise to secure the door.
Figure 15.
Replacing a TPH Fuse
Replacing a TPL-B Fuse
PROCEDURE
Note:
Refer to
as this procedure is performed.
1.
Open the distribution cabinet’s front door by turning the
latch in the counterclockwise position.
2.
Remove the fuse case from the mounted fuse block by
grasping its handle and pulling it straight out.
3.
Open the fuse case.
4.
Remove the open fuse from the fuse case and replace it
with the same type and rating.
Insert these terminals
into corresponding sockets
on distribution panel.
Longer Side
to the Bottom
Shorter Side
to the Top
Lettering on
handle must be
right side up.
Turn off
before installing.
Fuse
Fuse Carrier
Fuseholder Body