Table of Contents
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PowerVac
With ML-18 or ML-18H Mechanism
Table of Contents
Description
1.1
Safety .............................................................................. 4
1.2
Maintenance ................................................................... 4
2.1
General............................................................................ 5
2.2
Summary Description ...................................................... 5
3.1
Receiving ........................................................................ 5
A. Equipment Packages ................................................. 5
B. Inspecting for Damage .............................................. 5
C. Filing a Claim ............................................................. 5
3.2
Handling .......................................................................... 5
3.3
Storage............................................................................ 5
4.1
Safety Precautions........................................................... 6
4.2
Interlocks ......................................................................... 6
4.2.1
Rating Interference Plate................................................. 6
4.2.2
Closing Spring Interlock ................................................... 7
4.2.3
Negative Interlock............................................................ 7
4.2.4
Positive Interlock Bar....................................................... 7
4.2.5
Closing Spring Gag Interlock............................................ 7
5.1
General............................................................................ 8
5.2
Close Spring Charging ..................................................... 8
5.3
Closing Operation............................................................ 8
5.4
Opening Operation.......................................................... 9
5.5
Trip-free Operation .......................................................... 9
7.1
Visual Inspection.............................................................. 9
7.2
Closing Spring Charging .................................................. 10
7.3
Closing Spring Gag .......................................................... 10
7.4
Slow Closing.................................................................... 10
7.5
Gag Plate Removal.......................................................... 10
8.1
Primary Contact Erosion .................................................. 11
8.2
ML-18 Wipe Spring Compression.................................... 11
8.3
ML-18H Wipe Spring Compression ................................. 11
8.4
Contact Gap .................................................................... 11
8.5
Coil Plunger Gap.............................................................. 11
8.6
Control Switch Adjustment.............................................. 12
8.6.1
LCS and SM/LS Switch Adjustment................................. 12
8.6.2
CL/MS Switch Adjustment .............................................. 12
8.6.3
IL/MS Switch Adjustment................................................ 13
2
Vacuum Circuit Breaker
Page
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................................................ 5
...................................................... 5
....................................................... 6
................................................... 8
........................................ 9
......................................... 9
.......................... 11
Description
9.1
Electrical Operation ......................................................... 14
9.2
High Potential Test.......................................................... 14
9.2.1
Primary Circuit................................................................. 14
9.2.2
Secondary Circuit ............................................................ 14
9.3
Primary Circuit Resistance .............................................. 14
9.4
Vacuum Interrupter Integrity Test.................................... 14
9.5
Insulation Test ................................................................. 15
11.1
General ........................................................................... 17
11.1.1
PowerVac Interrupter ...................................................... 17
11.1.2
Trouble Reporting ........................................................... 17
11.2
Service Conditions .......................................................... 17
11.3
Fault Interruptions ........................................................... 17
11.4
Contact Erosion ............................................................... 17
11.5
Transfer Finger Wear ...................................................... 17
11.6
Mechanism ..................................................................... 17
11.7
Primary Insulation Parts ................................................... 17
11.8
Lubrication ...................................................................... 18
11.9
Recommended Maintenance.......................................... 18
14.1
General ........................................................................... 21
14.2
Replacement of Interrupter Assemblies ......................... 21
14.3
Primary Disconnect Fingers ............................................ 21
14.4
Mechanism ..................................................................... 21
14.5
Control Switches ............................................................. 21
14.6
Trip Coil Replacement..................................................... 21
14.7
Closing Coil Replacement ............................................... 22
14.8
Auxiliary Switch Replacement......................................... 22
14.9
Motor Replacement........................................................ 22
14.10
"Y" Relay Replacement ................................................... 22
15.1
Ordering Instructions....................................................... 23
16.1
General ........................................................................... 23
16.2
Wipe Adjustment ............................................................ 23
16.3
Contact Gap Adjustment ................................................. 23
16.4
Trip Coil Plunger.............................................................. 24
16.5
Close Coil Plunger........................................................... 24
16.6
Close Latch Stop Bolt...................................................... 24
16.7
Closing Spring Discharge Interlock .................................. 24
16.8
Negative Interlock ........................................................... 24
........................................................................................ 37
Trouble Reporting Form................................................................ 39
Page
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... 20
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