Installation Manual
| DCPDU2B Series Power Distribution Units
16
+1 (208) 635-6400 | www.transtector.com
12.0 INSTALLING CIRCUIT BREAKERS
The DCPDU2B Series employs pluggable circuit breakers that can be easily installed, removed
or replaced using the supplied puller tools. This operation is carried out without the need to
dismount the unit from it’s installation.
Installation, removal or replacement of a circuit breaker and connection or disconnection of a
load circuit should be carried out only by only by qualified technical persons who are trained
in the use of power systems and are well aware of the hazards involved.
Although it may be necessary on some occasions to carry out this operation while power
remains applied to the panel, it is always preferable to switch off the power if possible before
proceeding.
12.1 Removing the cover plate.
To remove the cover plate undo the two knurled retaining
screws at the left and right side of the unit and pull forward.
12.2 Removing a breaker or blanking panel.
To remove a breaker pull the toggle switch
handle using the supplied puller tool until the breaker comes free. To remove a
blanking panel lever it out at the top or bottom using a flat bladed screwdriver.
12.3 Installing a breaker or blank panel.
To insert a breaker carefully push the breaker
firmly into the socket and make sure that it is fully seated. To fit a blanking panel use
the two supplied retaining screws to fit it into position.
Repeat the above procedure from 12.2 to 12.3 for all positions and then replace the
cover plate.
12.4 Conditions for breaker positioning.
For thermal reasons, when operating the panel
continuously at the current ratings stated in note (2) on page 15, the circuit breaker
current shall not exceed the continuous rating as defined in the table.
Adjoining gaps on each side of the circuit breaker must be provided for current ratings
70A to 200A. None are required for 2.5A to 60A.
Circuit Breaker Gap Requirements
CB Current
Rating
Number
Poles
Max. Continuous
Load
Adjoining Gap
(each side)
2.5A to 60A
1
80% of CB rating
(70% @ 70°C)
NO
70A to 100A
1
75% of CB rating
(50% @ 70°C)
YES
125A to 200A
2
62.5% of CB rating
(37.5% @ 70°C)
YES
