Siemens 3AH Instructions, Installation, Operation, Maintenance - Page 3

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Siemens 3AH Instructions, Installation, Operation, Maintenance
Vacuum Circuit Breaker Operator Module

Table of Contents

Introduction and Safety ........................................................ 3
Introduction .............................................................................. 3
Qualified Person ....................................................................... 3
Signal Words ............................................................................ 3
Dangerous Procedures ................................................. 3
Field Service Operation ............................................................ 3
Receiving, Handling and Storage ......................................... 4
Introduction .............................................................................. 4
Receiving Procedure ................................................................ 4
Shipping Damage Claims (when applicable) ............................ 4
Handling Procedure .................................................................. 4
Storage Procedure ................................................................... 4
Introduction .............................................................................. 5
Manual Spring Charging Check ................................................ 5
Automatic Spring Charging Check ........................................... 5
Interrupter/Operator Description ......................................... 6
Introduction .............................................................................. 6
Vacuum Interrupters ................................................................ 7
Primary Disconnects (Figure 4) ................................................ 7
Phase Barriers .......................................................................... 7
Stored Energy Operating Mechanism ...................................... 7
Interrupter/Operator Module .................................................... 7
Construction (Refer to Figures 1, 2 and 5) ............................... 8
Breaker Pole (Figure 5) ............................................................. 8
Current-Path Assembly (Figure 5) ............................................ 8
Vacuum Interrupter (Figure 5) .................................................. 8
Switching Operation (Figure 6) ................................................ 8
Operating Mechanism ............................................................. 8
Construction .......................................................................... 10
Indirect Releases (Tripping Coils) (Figure 6) ........................... 10
Motor Operating Mechanism (Figure 6) ................................. 10
Auxiliary Switch (Figure 6) ...................................................... 10
Mode of Operation ................................................................. 10
Charging ................................................................................. 10
Closing (See Figure 6) ............................................................ 10
Trip Free Operation (Figure 6) ................................................ 10
Opening (Figure 6) ................................................................. 10
Rapid Auto-Reclosing ............................................................. 12
Manual Operation .................................................................. 12
Manual Closing (Figure 6) ...................................................... 12
Manual Opening (Figure 6) ..................................................... 12
Secondary (Shunt) Release .................................................... 12
Undervoltage Release ............................................................ 13
(See Figures 9, 10 and 11) .................................................. 13
Capacitor Trip Device ............................................................. 13
Shock Absorber ...................................................................... 14
Auxiliary Switch ...................................................................... 14
Maintenance ......................................................................... 15
Introduction and Maintenance Intervals ................................. 15
Recommended Hand Tools .................................................... 15
Recommended Maintenance and Lubrication ....................... 15
Checks of the Primary Power Path ........................................ 16
Cleanliness Check .................................................................. 16
Maintenance and Lubrication ................................................. 16
Fastener Check ...................................................................... 17
Electrical Control Checks ....................................................... 18
Check of the Wiring and Terminals ........................................ 18
(Control Power Required) .................................................... 18
(Control Power Required) .................................................... 20
Checks of the Spring Charging Motor .................................... 20
Vacuum Interrupters .............................................................. 20
High-Potential Tests ............................................................... 20
High Potential Test Voltages .................................................. 20
Vacuum Integrity Test Procedure ........................................... 21
Functional Tests ..................................................................... 22
Overhaul ............................................................................... 23
Introduction ............................................................................ 23
Circuit Breaker Overhaul ........................................................ 23
Replacement at Overhaul ...................................................... 23
Replacement of Vacuum Interrupters .................................... 23
Hydraulic Shock Absorber ...................................................... 25
Maintenance and Troubleshooting .................................... 27
Appendix ............................................................................... 30
Cover SGIM-9918-01
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