Eaton NRX Series Instruction Manual

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Series NRX with PXR – Type NF Low Voltage Power (Air) Circuit Breaker Instruction Manual MN013001EN May 2015 www.eaton.com
Table of Contents
SECTION 1: INTRODUCTION .........................................1
Purpose .............................................................1
Safety ..............................................................1
Qualified Personnel ....................................................1
General Information ....................................................1
Product Labeling and Identification ........................................2
Breaker Overview .....................................................6
Drawout Breaker and Cassette ...........................................6
Fixed Circuit Breaker ...................................................6
SECTION 2: RECEIVING, HANDLING, AND INSTALLATION ................ 11
Suggested Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Circuit Breaker Unpacking and Inspection ..................................11
Storing Circuit Breaker ................................................13
Circuit Breaker Inspection ..............................................14
Installing the Drawout Circuit Breaker ....................................14
Rejection Interlocks ...................................................15
Circuit Breaker Positioning .............................................15
Installing Fixed Circuit Breaker ..........................................17
Operating Mechanism .................................................18
SECTION 3: BREAKER GENERAL OPERATION CIRCUIT BREAKER
DESCRIPTION AND OPERATION .....................................18
Introduction .........................................................18
Basic Circuit Breaker Assembly .........................................19
Pole Units ..........................................................19
Operating Mechanism .................................................19
Manual Operation ....................................................19
Electrical Operation ...................................................20
Anti-pump Feature ....................................................20
SECTION 4: CIRCUIT BREAKER FEATURES AND ACCESSORIES ...........20
Introduction .........................................................20
Arc Chambers .......................................................20
Electronic Tripping System ..............................................20
Microprocessor-based Trip Unit ..........................................20
Rating Plugs (No Longer Required with PXR Trip Units) .......................21
Current Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
General Wiring Notes .................................................23
Accessory Devices ...................................................24
Accessory Tray Devices ................................................24
Left Accessory Tray ...................................................24
Right Accessory Tray ..................................................24

Eaton NRX Series Specifications

General

Brand	Eaton
Model	NRX Series
Category	Circuit breakers
Language	English