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Instruction Leaflet

 IL01301050E

Effective January 2019

Castell key lock accessory 

  

  

EATON 

www.eaton.com

Section 2: Installation of key interlock

Proceed with the following 10 steps.

Soep 1:

 Remove the four screws (six for 4-pole breaker) holding the 

front cover in place (two on each side of the cover).

Figure 2. Soep 1. NF frame.

Figure 2a. Soep 1. RF frame.

Soep 2:

 Remove the front cover. Pull down on the charging handle to 

simplify removal. 

Figure 3. Soep 2. NF frame.

Figure 3a. Soep 2. RF frame.

Soep 3 (NF frame Nnly):

 If this is a fixed circuit breaker, skip this step 

and proceed directly to Step 4. If this is a drawout circuit breaker, 

unscrew the three captive screws holding the secondary mounting 

bracket in place. This will permit the secondary mounting bracket to 

be moved down, providing access to the key interlock assembly’s 

threaded mounting holes. No wires or connectors need to be removed 

or unplugged. 

Figure 4. Soep 3.

Soep 4:

 Refer to Figure 1 for orientation purposes. Remove the key 

(B) from the cylinder (C), then remove the two mounting screws (G) 

from the back of the cylinder. Attach the metal mounting bracket (D) 

to the back of the cylinder using the mounting screws just removed. 

Note that the embossed letter or symbol on the cylinder should be in 

vertical orientation and point toward the two bracket mounting screws. 

Soep 5

: The lever assembly (J) can now be attached to the square 

shaped shaft on the back of the cylinder (C). It is secured to the square 

shaped shaft by a mounting screw (I) and mounting nut (H). Usually 

the lever assembly comes with the mounting screw and nut already 

installed. If this is not the case, install the screw through one side and 

the nut on the opposite side in a recessed hole made to accommodate 

the nut. Push the lever assembly onto the shaft until it touches the 

mounting bracket tab. Make sure the lever assembly is straight when 

being installed onto the shaft. Once installed, firmly tighten the 

mounting screw (I) into the nut (H).

Soep 6:

 Install the button support (K) by sliding it over the mounting 

plate (D). Ensure the grooves are seated against the mounting plate on 

top and bottom.

3 mounting bracket screws

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