4
EATON CORPORATION
www.eaton.com
Instructional Leaflet
IL01301037E
Effective December 2010
IMPORTANT
KEEP IN MIND THAT TO REMOVE AN ACCESSORY PLUG ON A FIXED
CIRCUIT BREAKER, THE APPROPRIATE FIXED SECONDARY TERMINAL
BLOCK MUST FIRST BE REMOVED. ONCE THE TERMINAL BLOCK IS
REMOVED, THE ACCESSORY CONNECTOR PLUG CAN BE UNPLUGGED
FROM THE BOTTOM OF THE TERMINAL BLOCK. REFER TO FIGURE 4 IN
SECTION 1 FOR ASSISTANCE WITH THE REMOVAL.
Step 8e:
Once all terminal blocks are securely mounted, replace
the front cover and secure it in place with the four mounting
screws previously removed in Step 1.
Section 3: Installation and removal of dra-
wout terminal blocks
IMPORTANT
KEEP IN MIND THAT SECONDARY TERMINAL BLOCKS ASSOCIATED
WITH DRAWOUT CIRCUIT BREAKERS ARE DIN RAIL MOUNTED ON
THE BREAKER’S DRAWOUT CASSETTE (FIGURE 11). ACCESSORY
SECONDARY PLUGS PLUG INTO A SECONDARY PLUG HOUSING
MOUNTED ON THE TOP FRONT OF THE CIRCUIT BREAKER (FIGURE 12).
AS SUCH, SECONDARY CONNECTIONS ARE AUTOMATICALLY MADE
OR DISCONNECTED DURING THE LEVERING (RACKING) PROCESS AS
THE SECONDARY PLUG HOUSING ON THE BREAKER ENGAGES OR
DISENGAGES THE SECONDARY TERMINAL BLOCKS MOUNTED ON THE
DRAWOUT CASSETTE. FOR THIS REASON, ACCESSORY SECONDARY
PLUGS DO NOT HAVE TO BE UNPLUGGED TO ADD OR REMOVE
TERMINAL BLOCKS. REFER TO FIGURES 3 AND 4 OF SECTION 1 AND
THE ASSOCIATED COPY FOR ASSISTANCE WITH CONNECTING OR
DISCONNECTING ACCESSORY SECONDARY PLUGS.
otee:
N
Many illustrations use the NF Frame cassette for
illustrative purposes only. The RF Frame cassette is handled in
a similar fashion.
Figure 11. Cassette-Mounted Terminal Blocks NF Frame
Figure 11a. Cassette-Mounted Terminal Blocks RF Frame
Figure 12. Secondary Plug Engaging Plug Housing
Proceed with the following 12 steps:
Step 1e:
Become familiar with the drawout terminal block
(
Figure 1
of Section 1) and the cassette’s DIN rail mounting
location.
otee:
N
The terminal block mounting locations have numerical
and descriptive laser-etched identifications (Figure 14).
In addition, a terminal block alignment bracket is bolted in
place to provide for proper alignment and separation of each
individual terminal block during the levering (racking) process.
Two alignment brackets are used with the RF Frame cassette
since two cradles are required to accommodate the additional
terminal blocks. The bracket’s separation teeth ensure this
alignment and separation (
Figure 13
). Terminal block align-
ment brackets must be removed to add or remove terminal
blocks. Brackets are supplied as part of the cassette and also
have etched numerical identifications.
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