Eaton MDS-620 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
John DeanAug 7, 2025
What to do if the Eaton MDS-620 circuit breaker trips open?
- C
  Catherine GarciaAug 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.
W
William CalhounAug 22, 2025
Why does my Eaton MDS-620 circuit breaker open if the fault trip indicator button is not out?
- E
  Emily NguyenAug 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-620 Specifications

General

Brand	Eaton
Model	MDS-620
Category	Power Tool
Language	English

Summary

SAFETY

SECTION 1: INTRODUCTION

1-1 GENERAL INFORMATION

Covers Magnum DS, DSX, and DSL breakers, their types, frame sizes, ratings, and standards.

1-2 SAFETY FEATURES

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

1-3 SAFETY PRACTICES

Outlines essential safety codes, standards, and regulations for installation and operation.

1-4 QUALIFIED PERSONNEL

Defines personnel qualifications for operating, maintaining, and installing circuit breakers.

SECTION 2: RECEIVING, HANDLING AND INSTALLATION

2-5 CIRCUIT BREAKER INSPECTION

Instructs on visual inspection for damage and checking rating plug/sensor match.

2-6 INSTALLING DRAWOUT CIRCUIT BREAKER

Guides on placing drawout breakers onto extension rails and ensuring proper seating.

SECTION 3: CIRCUIT BREAKER DESCRIPTION AND OPERATION

3-6 ELECTRONIC TRIPPING SYSTEM

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

3-7 SECONDARY CONTACTS AND CONNECTION DIAGRAMS

Discusses secondary wiring points, plug-in connectors, and their protection.

3-9 MDSL LIMITERS/BLOWN LIMITER INDICATION

3-9.1 MDSL CURRENT LIMITERS

Details MDSL current limiters, their testing, approval, and replacement guidelines.

3-9.2 BLOWN LIMITER SENSING

Explains the blown limiter indicator and the circuit that trips the breaker when a limiter blows.

SECTION 4: DRAWOUT CIRCUIT BREAKER AND CASSETTE

SECTION 6: INSPECTION AND MAINTENANCE

6-4 WHAT TO INSPECT

Details inspection points for drawout breakers, primary disconnects, and fixed breakers.

SECTION 7: TROUBLESHOOTING

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