Eaton MDS-816 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:

C
Christina Ramirez DDSAug 6, 2025
What to do if the Eaton MDS-816 circuit breaker trips open?
- B
  Brian PetersAug 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.
A
Angela WilliamsAug 22, 2025
Why does my Eaton Power Tool circuit breaker open if the fault trip indicator button is not out?
- K
  Kenneth RiggsAug 22, 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-816 Specifications

General

Brand	Eaton
Model	MDS-816
Category	Power Tool
Language	English

Summary

SECTION 1: INTRODUCTION

1-2 SAFETY FEATURES

Built-in interlocks and safety features for hazard reduction and proper sequences.

1-3 SAFETY PRACTICES

Essential safety procedures for personnel working with circuit breakers.

1-4 QUALIFIED PERSONNEL

Requirements for personnel operating and maintaining circuit breakers.

SECTION 2: RECEIVING, HANDLING AND INSTALLATION

2-6 INSTALLING DRAWOUT CIRCUIT BREAKER

Steps for installing drawout circuit breakers into their cassettes.

2-6.2 CIRCUIT BREAKER POSITIONING

2-6.3 LEVERING CIRCUIT BREAKER

SECTION 3: CIRCUIT BREAKER DESCRIPTION AND OPERATION

3-4.1 MANUAL OPERATION

3-4.2 ELECTRICAL OPERATION

3-6 ELECTRONIC TRIPPING SYSTEM

3-6.1 MICROPROCESSOR-BASED TRIP UNIT

3-6.2 RATING PLUG

Function and importance of the rating plug for trip unit configuration.

3-7 SECONDARY CONTACTS AND CONNECTION DIAGRAMS

3-7.1 CONNECTION DIAGRAMS

Visual representations of electrical connections for various breaker configurations.

SECTION 6: INSPECTION AND MAINTENANCE

6-1 GENERAL

Importance of inspection and maintenance for equipment longevity and safety.

6-2 GENERAL CLEANING RECOMMENDATIONS

6-4 WHAT TO INSPECT

6-4.1 FUNCTIONAL FIELD TESTING

Procedures for performing operational tests on the breaker.

6-5 CIRCUIT BREAKER MODIFICATIONS AND CHANGES

Field procedures for modifying or updating breaker components.

6-5.1 RATING PLUG REPLACEMENT

Steps for replacing the rating plug in the trip unit.

6-5.2 CURRENT SENSOR REPLACEMENT

Procedure for replacing current sensors within the breaker.

6-5.3 CURRENT LIMITER REPLACEMENT (MDSL)

Instructions for replacing current limiters in MDSL breakers.

SECTION 7: TROUBLESHOOTING

7-1 INTRODUCTION

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