6
Section 1: Introduction
Series NRX with PXR – Type NF Low Voltage Power (Air) Circuit Breaker Instruction Manual
MN013001EN May 2015 www.eaton.com
Figure 2A . Series NRX Type RF - Frame Cassette Catalog Numbering System .
NF Cassette Catalog Numbering System
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 .
Position 8
Door Frame Gasket and Rejection Kits
B
Door Kit Included (Default)
Position 9
TOC Switches (Truck Operated Cell)
N
Not Included (Default)
Position 10
Shutters
N
Not Included (Default)
S
Included
Position 11
Secondary Contact Terminals Installed
N
None
F
Full Complement
B
Defined by Breaker
C
Common Options
Position 12
Future Use
N
None
Position 13
Future Use
N
None
Position 14
Cassette Shipping
C
Cassette Only
B
Breaker Shipped in Cassette
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 .
Positions
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16 17 18 19 20
