Eaton Cutler-Hammer DHP-VR Series Instructions For Installation, Operation And Maintenance page 5

Vacuum replacement circuit breakers for dhp switchgear

Table of Contents

5-4

Interlocks ..........................................................................................................................................................................29

5-4.1

Breaker-Cell Coding Plates ..............................................................................................................................29

5-4.2

Levering-in Interlock .........................................................................................................................................29

5-4.3

Anti-Close Interlock ...........................................................................................................................................30

5-4.4

Floor Tripping and Closing Spring Release Interlocks .................................................................................30

5-4.5

Rail Latch ...........................................................................................................................................................30

5-5

Miscellaneous Items .......................................................................................................................................................32

5-5.1

Ground Contact .................................................................................................................................................32

5-5.2

MOC and TOC Switch Operations ...................................................................................................................32

5-5.3

Operations Counter ...........................................................................................................................................32

5-6

Levering Device ............................................................................................................................... 32

SECTION 6

INSPECTION AND MAINTENANCE

6-1

Introduction ......................................................................................................................................................................34

6-2

Frequency of Inspection .................................................................................................................................................34

6-3

Inspection and Maintenance Procedures .....................................................................................................................35

6-4

Vacuum Interrupter Integrity Test ..................................................................................................................................36

6-5

Contact Erosion and Wipe ..............................................................................................................................................36

6-6

Insulation ..........................................................................................................................................................................37

6-7

Insulation Integrity Check ...............................................................................................................................................37

6-8

Primary Circuit Resistance Check .................................................................................................................................38

6-9

Mechanism Check ...........................................................................................................................................................38

6-9.1

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Test ..................................................................................................................................................39

6-10

Lubrication .......................................................................................................................................................................43

6-11

Troubleshooting ...............................................................................................................................................................44

SECTION 7

RENEWAL PARTS

7-1

General .............................................................................................................................................................................47

7-1.1

Ordering Instructions ........................................................................................................................................47

Table

Title

1.1

Type DHP-VR

3.1

DHP-VR Weights ............................................................................................................................7

5.1

Typical Opening and Closing Times ........................................................................................................... 27

6.1

Vacuum Interrupter Integrity Test Voltage ................................................................................................. 36

6.4

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