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Eaton MDS-816 - User Manual

Eaton MDS-816
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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.

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

Eaton MDS-816 Specifications

General IconGeneral
BrandEaton
ModelMDS-816
CategoryPower Tool
LanguageEnglish

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