Eaton MDS-C32 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

Eaton MDS-C32 Specifications

General

Brand	Eaton
Model	MDS-C32
Category	Power Tool
Language	English

Summary

SECTION 1: INTRODUCTION

1-1 GENERAL INFORMATION

Overview of Magnum DS, DSX, and DSL circuit breakers, their types, applications, and general specifications.

1-2 SAFETY FEATURES

Details built-in interlocks and safety features for operating personnel and proper sequences.

1-3 SAFETY PRACTICES

Outlines essential safety practices for personnel working with circuit breakers.

1-4 QUALIFIED PERSONNEL

Defines the qualifications required for operating and maintaining circuit breakers.

SECTION 2: RECEIVING, HANDLING AND INSTALLATION

2-3 UNPACKING CIRCUIT BREAKER

Provides instructions for safely unpacking circuit breakers and inspecting for damage.

2-4 LIFTING CIRCUIT BREAKER

Details proper procedures and precautions for lifting circuit breakers.

2-6 INSTALLING DRAWOUT CIRCUIT BREAKER

Step-by-step guide for installing drawout circuit breakers into their cassettes.

2-6.1 REJECTION INTERLOCKS

Explains the function and importance of rejection interlock key plates.

2-6.2 CIRCUIT BREAKER POSITIONING

Describes the four normal positions for drawout circuit breakers: Remove, Disconnect, Test, Connect.

2-8 CIRCUIT BREAKER OPERATION

2-6.3 LEVERING CIRCUIT BREAKER

Details the process of levering circuit breakers into different positions within the compartment.

SECTION 3: CIRCUIT BREAKER DESCRIPTION AND OPERATION

3-1.1 MDSL APPLICATION/OPERATION

3-4 OPERATING MECHANISM

3-4.1 MANUAL OPERATION

3-4.2 ELECTRICAL OPERATION

3-6 ELECTRONIC TRIPPING SYSTEM

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

3-6.1 MICROPROCESSOR-BASED TRIP UNIT

3-6.2 RATING PLUG

Explains the function of the rating plug, its match to sensors, and NEC requirements.

3-6.3 CURRENT SENSORS

3-6.6 MAKING CURRENT RELEASE

3-8.1 PLUG-IN ELECTRICAL ACCESSORIES

3-9 MDSL LIMITERS/BLOWN LIMITER INDICATION

SECTION 6: INSPECTION AND MAINTENANCE

6-1 GENERAL

Emphasizes the importance of inspection and maintenance for breaker longevity and safety.

6-2 GENERAL CLEANING RECOMMENDATIONS

6-4 WHAT TO INSPECT

6-4.1 FUNCTIONAL FIELD TESTING

Describes functional tests for manually and electrically operated circuit breakers.

6-4.2 ARC CHUTE INSPECTION

6-4.3 PRIMARY CONTACT INSPECTION

Explains how to inspect primary contacts for wear using a contact wear indicator.

6-5 CIRCUIT BREAKER MODIFICATIONS AND CHANGES

6-5.1 RATING PLUG REPLACEMENT

Provides step-by-step instructions for replacing the rating plug on the trip unit.

6-5.2 CURRENT SENSOR REPLACEMENT

Details the procedure for replacing current sensors, including necessary pre-removal steps.

6-5.3 CURRENT LIMITER REPLACEMENT (MDSL)

Explains the procedure for replacing MDSL current limiters, noting size restrictions.

6-5.3.1 REPLACING TYPE MA AND MB CURRENT LIMITERS

6-5.3.2 REPLACING TYPE MD CURRENT LIMITERS

6-5.3.3 REPLACING TYPE MD CURRENT LIMITERS ON MDSL20 BREAKERS

SECTION 7: TROUBLESHOOTING

7-1 INTRODUCTION

Introduces troubleshooting guidance for circuit breaker problems and corrective actions.