Eaton MDS-516 - User Manual

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

Summary

Section 1: Introduction

1-2 Safety Features

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

1-3 Safety Practices

Outlines essential safety practices for installation, operation, and maintenance.

1-4 Qualified Personnel

Defines the necessary qualifications for personnel working with the equipment.

Section 2: Receiving, Handling and Installation

2-5 Circuit Breaker Inspection

2-6 Installing Drawout Circuit Breaker

Step-by-step guide for installing drawout circuit breakers.

2-6.1 Rejection Interlocks

2-6.2 Circuit Breaker Positioning

2-6.3 Levering Circuit Breaker

2-8 Circuit Breaker Operation

Section 3: Circuit Breaker Description and Operation

3-4.1 Manual Operation

3-4.2 Electrical Operation

3-4.3 Anti-Pump Feature

3-6 Electronic Tripping System

Describes the three-part electronic tripping system.

3-6.1 Microprocessor-Based Trip Unit

Information on the Digitrip RMS trip units.

3-6.2 Rating Plug

Details the function and importance of the rating plug.

3-6.3 Current Sensors

Describes the location and function of current sensors.

3-6.4 Trip Actuator

Explains the electromagnetic trip actuator.

3-6.6 Making Current Release

Details the safety feature preventing closing on a faulted circuit.

3-6.7 High Instantaneous Trip Option (Magnum DS Only)

Explains the high instantaneous trip option for specific breakers.

3-7 Secondary Contacts and Connection Diagrams

3-7.1 Connection Diagrams

3-8.1 Plug-In Electrical Accessories

3-8.2 Internal Electrical Accessories

3-8.3 Mechanical Accessories

3-9 MDSL Limiters;Blown Limiter Indication

Information on MDSL current limiters and blown limiter indication.

3-9.1 MDSL Current Limiters

Specifics on MDSL current limiters and their application.

3-9.2 Blown Limiter Sensing

Explains the blown limiter indicator and its function.

Section 4: Drawout Circuit Breaker and Cassette

4-1.1 Drawout Cassette

Section 6: Inspection and Maintenance

6-1 General

6-2 General Cleaning Recommendations

6-3 When to Inspect

6-4 What to Inspect

6-4.1 Functional Field Testing

Procedures for performing functional tests in the field.

6-4.2 Arc Chute Inspection

Instructions for inspecting arc chutes and chambers.

6-4.3 Primary Contact Inspection

6-5.1 Rating Plug Replacement

Steps for replacing the rating plug.

6-5.2 Current Sensor Replacement

Procedure for replacing current sensors.

6-5.3 Current Limiter Replacement (MDSL)

Instructions for replacing MDSL current limiters.

Section 7: Troubleshooting

Eaton MDS-516 Specifications