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PowerVac
5kV Vertical Lift
®
Table of Contents
Chapter 9. Electrical Checks
9-1
Electrical Operation ............................................................................................... 28
9-2
High Potential Test ................................................................................................ 28
Primary Circuit ....................................................................................................... 28
Secondary Circuit .................................................................................................. 28
9-3
Primary Circuit Resistance.................................................................................... 28
9-4
Vacuum Integrity Test ............................................................................................ 28
9-5
Insulation Tests ..................................................................................................... 29
Chapter 10. Maintenance
10-1 General .................................................................................................................. 30
10-2 Service Conditions ................................................................................................ 31
10-3 Fault Interruptions ................................................................................................. 31
10-4 Contact Erosion ..................................................................................................... 31
10-5 Transfer Finger Wear ............................................................................................. 31
10-6 Mechanism ............................................................................................................ 31
10-7 Primary Insulation Parts ........................................................................................ 31
10-8 Lubrication ............................................................................................................ 32
10-9 Recommended Maintenance ................................................................................ 32
10-10 Breaker Timing and Speed Check ........................................................................ 32
Chapter 11. Mechanical Adjustments
11-1 General .................................................................................................................. 35
11-2 Wipe Adjustment ................................................................................................... 35
11-3 Contact Gap Adjustment ....................................................................................... 36
11-4 Trip Coil Plunger ................................................................................................... 37
11-5 Close Coil Plunger ................................................................................................ 38
11-6 Control Switch Adjustment .................................................................................. 39
11-7 Adjustment of MOC Switch .................................................................................. 39
11-8 Positive Interlock ................................................................................................... 40
Chapter 12. Repair and Replacement
12-1 General .................................................................................................................. 44
12-2 Replacing Interrupters ........................................................................................... 44
12-3 Primary Bushing .................................................................................................... 45
12-4 Mechanism ............................................................................................................ 45
12-5 Control Switches ................................................................................................... 45
12-6 Trip Coil Replacement .......................................................................................... 45
12-7 Closing Coil Replacement .................................................................................... 47
12-8 Auxiliary Switch Replacement .............................................................................. 47
12-9 Motor Replacement ............................................................................................... 49
12-10 "Y" Relay Replacement ........................................................................................ 49
Chapter 13. Renewal Parts
13-1 Ordering Instructions ............................................................................................ 51
Chapter 14. Stationary Cubicle Subassembly
14-1 Introduction ........................................................................................................... 53
14-2 Major Components ............................................................................................... 53
14-3 Testing and Inspection .......................................................................................... 54
14-4 Compartment Maintenance ................................................................................... 58
Courtesy of NationalSwitchgear.com
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