Eaton MDN-408 - User Manual

Double-wide Fixed
Standard Frame Fixed
Narrow Frame Fixed
Instructions for Installation, Operation and Maintenance of
Magnum DS, DSX and DSL Low Voltage Power Circuit Breakers
I.B. 2C12060H08 Supersedes I.B. 2C12060H07 dated April 2005
Effective May 2006
IB2C12060H08
For more information visit: www.EatonElectrical.com
www . ElectricalPartManuals . com

Summary

PURPOSE

Manual Scope

Explains the manual's scope, covering installation, operation, and maintenance of Magnum DS, DSX, and DSL breakers.

SAFETY

Safety Requirements

Emphasizes adherence to safety codes, standards, and regulations for installation, operation, and maintenance.

SECTION 1: INTRODUCTION

1-1 General Information

General overview of Magnum DS, DSX, and DSL breakers, types, ratings, and standards.

1-2 Safety Features

Built-in interlocks and safety features for personnel protection and proper operation.

1-3 Safety Practices

Essential safety practices for installation, operation, and maintenance personnel.

1-4 Qualified Personnel

Defines qualifications for personnel involved with the circuit breakers.

SECTION 2: RECEIVING, HANDLING AND INSTALLATION

2-1 General Information

General aspects of receiving and handling circuit breakers, including those shipped with assemblies.

2-4 Lifting Circuit Breaker

Details safe lifting procedures and precautions for circuit breakers using appropriate equipment.

2-6 Installing Drawout Circuit Breaker

Guides on installing drawout circuit breakers into cassettes and extension rails.

2-7 Fixed Circuit Breaker

Highlights differences between fixed and drawout breakers, noting absence of levering and disconnects.

SECTION 3: CIRCUIT BREAKER DESCRIPTION AND OPERATION

3-1 Introduction

Introduces Magnum DS, DSX, and DSL breakers, their configurations, and common features.

3-2 Basic Circuit Breaker Assembly

Describes the general construction of Magnum breakers, including frame housing and insulating properties.

3-4 Operating Mechanism

Explains the cam and spring design of the operating mechanism, its stored energy capability, and access.

3-6 Electronic Tripping System

Outlines the three-part electronic tripping system: trip unit, sensors, and trip actuator.

SECTION 4: DRAWOUT CIRCUIT BREAKER AND CASSETTE

4-1 General

Introduces features unique to drawout breakers and cassettes not covered in Section 3.

4-1.1 Drawout Cassette

Describes the drawout cassette's role, interfaces, and different cassette styles for various breaker configurations.

4-2 Drawout Circuit Breaker Dimensions

Refers to external documents for dimensional information on drawout circuit breakers.

SECTION 5: FIXED CIRCUIT BREAKER

5-1 General

Introduces features unique to fixed MDS/MDSX circuit breakers not covered elsewhere.

5-2 Fixed Circuit Breaker Dimensions

Refers to external documents for fixed circuit breaker dimensions and adaptor details.

SECTION 6: INSPECTION AND MAINTENANCE

6-1 General

Emphasizes the importance of inspection and maintenance for equipment life and reliability.

6-4 What to Inspect

Details what specific parts and areas of the breaker require inspection for wear and damage.

6-5 Circuit Breaker Modifications and Changes

Covers field modifications and maintenance tasks, excluding most accessory devices.

SECTION 7: TROUBLESHOOTING

7-1 Introduction

Introduces troubleshooting guide for breaker problems and directs to related publications for trip unit issues.

SECTION 8: RENEWAL PARTS

8-1 General

Provides guidance on ordering renewal parts, specifying required information for accurate identification.

Eaton MDN-408 Specifications