Eaton MDS-C4N 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:

J
Joanne NormanAug 6, 2025
What to do if the Eaton Power Tool circuit breaker trips open?
- T
  Thomas ThomasAug 6, 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.
E
Elizabeth GarciaAug 21, 2025
Why does my Eaton MDS-C4N circuit breaker open if the fault trip indicator button is not out?
- H
  hutchinsondonaldAug 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-C4N Specifications

General

Brand	Eaton
Model	MDS-C4N
Category	Power Tool
Language	English

Summary

Section 1: Introduction

1-2 Safety Features

Details built-in interlocks and safety features for Magnum DS, DSX, and DSL circuit breakers.

1-3 Safety Practices

Outlines essential safety practices for personnel working with Magnum circuit breakers.

1-4 Qualified Personnel

Defines the qualifications required for personnel operating and maintaining Magnum circuit breakers.

Section 2: Receiving, Handling and Installation

2-5 Circuit Breaker Inspection

2-6 Installing Drawout Circuit Breaker

Describes the process of installing drawout type Magnum circuit breakers into their cassettes.

Section 3: Circuit Breaker Description and Operation

3-4 Operating Mechanism

3-5 Arc Chambers

3-6 Electronic Tripping System

Describes the three-part electronic tripping system used in Magnum circuit breakers.

3-8 Accessory Devices

3-9 MDSL Limiters/Blown Limiter Indication

Provides information on MDSL circuit breaker current limiters and blown limiter indication.

Section 6: Inspection and Maintenance

6-3 When to Inspect

6-4 What to Inspect

6-5 Circuit Breaker Modifications and Changes

6-5.1 Rating Plug Replacement

Provides instructions for replacing the rating plug on the trip unit.

6-5.2 Current Sensor Replacement

Details the procedure for replacing current sensors in Magnum circuit breakers.

6-5.3 Current Limiter Replacement (MDSL)

Explains how to replace current limiters on MDSL circuit breakers.

Section 7: Troubleshooting

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