Eaton MDS-632 User Manual

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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

Table of Contents

Questions and Answers:

S
Sheila WilliamsAug 7, 2025
What to do if the Eaton MDS-632 circuit breaker trips open?
- R
  Richard TerryAug 7, 2025
  If the Eaton Power Tool circuit breaker trips open, it could be due to several reasons. First, ensure the rating plug is installed and corresponds to the current sensors. If the breaker trips repeatedly due to transient current, allow the breaker and loads to cool before re-closing. Finally, an overload or fault current condition may be present. Use the status and fault indicators to locate and remove the overload or fault.
L
Laurie SandovalAug 21, 2025
Why does my Eaton Power Tool circuit breaker open if the fault trip indicator button is not out?
- G
  Gary DelgadoAug 21, 2025
  If your Eaton Power Tool circuit breaker opens and the fault trip indicator button is not out, several factors could be at play. It might be due to undervoltage release operation; in this case, check and correct the UVR supply voltage to be within 85-110% of the rated voltage. Alternatively, the shunt trip may be operating, so check the control signals to the shunt trip and correct if necessary. If neither of these is the cause, the trip latch may be defective, so inspect its condition and engagement before closing.

Eaton MDS-632 Specifications

General

Brand	Eaton
Model	MDS-632
Category	Power Tool
Language	English

Summary

SECTION 1: INTRODUCTION

SAFETY

Emphasizes adherence to safety codes and standards during operation.

1-2 SAFETY FEATURES

Details the built-in interlocks and safety features of the breakers.

1-3 SAFETY PRACTICES

Outlines essential safety practices for personnel.

SECTION 2: RECEIVING, HANDLING AND INSTALLATION

2-4 LIFTING CIRCUIT BREAKER

Details the correct procedures for lifting circuit breakers.

2-5 CIRCUIT BREAKER INSPECTION

Outlines steps for visually inspecting circuit breakers.

2-6 INSTALLING DRAWOUT CIRCUIT BREAKER

Explains the process of installing drawout circuit breakers.

2-6.2 CIRCUIT BREAKER POSITIONING

Details the four normal positions for drawout breakers.

2-6.3 LEVERING CIRCUIT BREAKER

Provides instructions on how to lever circuit breakers.

2-8 CIRCUIT BREAKER OPERATION

Explains how to perform initial operation checks.

SECTION 3: CIRCUIT BREAKER DESCRIPTION AND OPERATION

3-4 OPERATING MECHANISM

Describes the cam and spring operating mechanism.

3-4.1 MANUAL OPERATION

Explains how to manually operate the breaker.

3-4.2 ELECTRICAL OPERATION

Details electrical operation methods and options.

3-6 ELECTRONIC TRIPPING SYSTEM

Overviews the three-part electronic tripping system.

3-6.1 MICROPROCESSOR-BASED TRIP UNIT

Details the microprocessor-based trip unit features.

3-6.2 RATING PLUG

Explains the function and importance of the rating plug.

3-7 SECONDARY CONTACTS AND CONNECTION DIAGRAMS

Covers secondary connections and wiring diagrams.

3-8.1 PLUG-IN ELECTRICAL ACCESSORIES

3-8.2 INTERNAL ELECTRICAL ACCESSORIES

Motor Operator

3-9 MDSL LIMITERS/BLOWN LIMITER INDICATION

3-9.1 MDSL CURRENT LIMITERS

SECTION 6: INSPECTION AND MAINTENANCE

6-1 GENERAL

6-4 WHAT TO INSPECT

6-4.1 FUNCTIONAL FIELD TESTING

Details functional field testing procedures.

Trip Unit Overload Functional Test

Explains how to perform trip unit overload tests.

6-4.2 ARC CHUTE INSPECTION

6-4.3 PRIMARY CONTACT INSPECTION

6-5.1 RATING PLUG REPLACEMENT

6-5.2 CURRENT SENSOR REPLACEMENT

6-5.3 CURRENT LIMITER REPLACEMENT (MDSL)

SECTION 7: TROUBLESHOOTING

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