Section 1: General information

A maximum of 27 terminal blocks providing 54 secondary

contact points are available in one cradle on the NF Frame

circuit breaker. The RF Frame circuit breaker is available with

a maximum of 46 terminal blocks providing 92 secondary

contact points in two individual cradles. The number of termi-

nal blocks mounted depends on a number of considerations,

mounted and hence contact positions may be empty.

For drawout circuit breakers, secondary terminal blocks are

DIN rail mounted on the top front portion of the drawout cas-

sette. A cross connector can be used to tie adjacent contacts

together for drawout configurations (Figure 1).

Figure 1. Drawout Terminal Block

(RF Frame) for an applicable connection diagram, other spe-

cific wiring, and additional secondary contact information for

all Series NRX circuit breakers.

Section 2: Installation and removal of xed

terminal blocks

illustrative purposes only. The RF Frame circuit breaker is handled

in a similar fashion.

Proceed with the following eight steps:

Step 1: Remove the four screws holding the front cover in

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

Figure 14a. Step 1 (RF Frame)

Step 2: Remove the four mounting screws holding the termi-

nal block alignment bracket in place.

Figure 15. Step 2

Figure 18. Step 5

back into position by sliding it back into the DIN rail mounted

terminal blocks.

Step 10: To remove already mounted terminal blocks, first

remove the terminal block alignment bracket by performing

block as shown, and gently pry down to release and remove

the block from the DIN rail.

Figure 23. Step 11

Step 12: After all terminal blocks to be removed are removed,

perform Steps 7, 8, and 9 in this section to complete the

removal process.

EATON. THE CONTENTS OF THIS DOCUMENT SHALL NOT

BECOME PART OF OR MODIFY ANY CONTRACT BETWEEN

THE PARTIES.

In no event will Eaton be responsible to the purchaser or user in

contract, in tort (including negligence), strict liability, or otherwise

or claims against the purchaser or user by its customers resulting

from the use of the information, recommendations, and descrip-

The information contained in this manual is subject to change

without notice.