Table of Contents
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Instructions for the Eaton Type CM52
Network Protectors 800 to 4500 Amperes
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DESCRIPTION
Disclaimer of Warranties and Limitation of Liability................................................................................................................ii
Safety Pages...........................................................................................................................................................................................iii
Network Protector Rating Tables...................................................................................................................................................vii
Introduction...........................................................................................................................................................................................ix
1.1. Receiving..............................................................................................................................................................................1
1.2. Handling...............................................................................................................................................................................1
1.2.1.
1.2.2.
1.3. Storing..................................................................................................................................................................................1
2.0 General...............................................................................................................................................................................................2
2.1 CM52 Network Protector..................................................................................................................................................3
2.1.1
2.1.2
2.1.2.1
2.1.2.2
2.1.2.3
2.1.2.4
3.1 Procedure to Remove the Drawout Unit ....................................................................................................................4
3.1.1
3.1.2
3.2 Enclosure ..............................................................................................................................................................................5
3.2.1
3.2.2
3.2.3
4.1 Introduction..........................................................................................................................................................................6
4.2 B asic Circuit B reaker Assembly ....................................................................................................................................6
4.3 Pole Unit.................................................................................................................................................................................7
4.3.1
4.3.2
4.4 Electrical Operation...........................................................................................................................................................8
4.4.1
4.4.2
4.4.3
4.4.4
4.5 Arc Chambers......................................................................................................................................................................9
4.5.1
4.6 Electronic Tripping System .............................................................................................................................................9
4.7 Internal Electrical Accessories......................................................................................................................................10
Electrical Testing........................................................................................................................................................................11
Manual Closing of the CM52 B reaker.................................................................................................................................12
5.1 Renewal Parts list................................................................................................................................................................12
Diagrams................................................................................................................................................................................13-18
Addendum-Electrical Saf ety Interlock................................................................................................................................19
Addendum-Handle Change Instructions............................................................................................................................20
Addendum-Hardware Bag Kits.............................................................................................................................................22
Addendum-Maintenance Procedure.....................................................................................................................................24
Effective 11/05/08 (super cedes 11/19/03) IB 52-01-TE
TABLE OF CONTENTS
Lifting of Breaker..............................................................................................................................................1
Lifting of enclosure...........................................................................................................................................1
Frame ...................................................................................................................................................................3
Circuit B reaker Unit .......................................................................................................................................3
Arc Chutes .................................................................................................................................................3
Current Transformers ...........................................................................................................................3
Operating Mechanism ............................................................................................................................3
Control Module ........................................................................................................................................3
To Open the Door .............................................................................................................................................4
Levering the B reaker ......................................................................................................................................4
Outside Operating Handle .............................................................................................................................5
Mechanical Anti-Close Interlock .................................................................................................................6
Installing Network Protectors to Network Transf ormer ......................................................................6
Primary Moving Contacts...............................................................................................................................7
Primary Stationary Contacts.........................................................................................................................8
Procedure to Remove the Motor...................................................................................................................8
Anti-Pump Feature...........................................................................................................................................9
Anti-Close Feature............................................................................................................................................9
Trip and Lockout..............................................................................................................................................9
Arc Chutes...........................................................................................................................................................9
Instruction Booklet IB 52-01-TE
Effective October 2010
IB -52-01-TE
PAG E
EATON COrPOrATION www.eaton.com
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