Breaker Overview; Drawout Breaker And Cassette; Fixed Circuit Breaker - Eaton NRX Series Instruction Manual

Section 1: Introduction
Figure 2A . Series NRX Type RF - Frame Cassette Catalog Numbering System .
1 2
Positions
Position 1-2 Cassette Family and Breaker Frame
NQ UL 1066 N-Frame
NY UL 489 N-Frame
NG IEC 60947-2 N-Frame - Global
NA IEC 60947-2 N-Frame - China
Position 3-4 Continuous Ampere Range
08 800 A (UL 1066)
12 800 - 1200 A (UL 489)
16 630 - 1600 A (IEC)
Position 5 Poles, Phasing (Facing Front of Breaker)
3 3-pole, ABC
4 4-pole, NABC
Position 6 Load Terminal Connections
F With Flat Tapped Pads Only
G With Vertical/Horizontal Bus Adaptor Kit (Short Style)
H With Front Connected Kit
N No Flat Tapped Pads or Cassette Stabs Inter Unit Only)
Position 7 Arc Hood
A Arc Hood Installed (Default)

Breaker Overview

Figures 3 through 6 highlight the main components that
make up a Series NRX breaker .

Drawout Breaker and Cassette

A drawout circuit breaker is used in combination with a dra-
wout cassette (Figures 3 and 4) . Mounted on the drawout
breaker are the primary finger clusters and levering mecha-
nism . These components are located on the breaker to
allow Users easy access when performing product inspec-
tion or maintenance . The cassette provides all the neces-
sary drawout circuit breaker interfaces, including primary
and secondary connections . Standard flat terminal pads
on the rear of the cassette provide for a variety of primary
connection configurations . Optional primary adapters are
available for front and rear bus or cable connections . For
specific details and mounting instructions for primary adapt-
ers, refer to www .Eaton .com/seriesnrx .
Refer to Section 5 for mounting and installation dimensional
information . Electronic files of dimensional drawings for
customer use are available for download at www .eaton .
com/seriesnrx .
6
Series NRX with PXR – Type NF Low Voltage Power (Air) Circuit Breaker Instruction Manual MN013001EN May 2015 www.eaton.com
NF Cassette Catalog Numbering System
3 4 5 6 7 8 9 10 11 12 13
Position 8
B
Position 9
N
Position 10
N
S
Position 11
N
F
B
C
Position 12
N
Position 13
N
Position 14
C
B

Fixed Circuit Breaker

A fixed circuit breaker is rigidly mounted in its structure with
no drawout feature . The circuit breaker is available in front
and rear-connected configurations (Figure 5) .
The breaker can be mounted on a suitable horizontal mount-
ing surface using left and right-side mounting feet . A stan-
dard fixed circuit breaker is supplied with flat primary termi-
nal pads on the rear of the breaker that will accommodate a
variety of primary connection configurations .
14 15 16 17 18
Door Frame Gasket and Rejection Kits
Door Kit Included (Default)
TOC Switches (Truck Operated Cell)
Not Included (Default)
Shutters
Not Included (Default)
Included
Secondary Contact Terminals Installed
None
Full Complement
Defined by Breaker
Common Options
Future Use
None
Future Use
None
Cassette Shipping
Cassette Only
Breaker Shipped in Cassette
19 20