Table Of Contents - Siemens 3AH Installation Operation & Maintenance

Vacuum Circuit Breaker Operator Module

Table of Contents

Table of Contents ...................................................................1
Table of Illustrations ..............................................................2
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
Installation Checks and Initial Functional Tests ..................5
Introduction ...............................................................................5
Inspections, Checks and Tests without Control Power .............5
Spring Discharge Check (Figure 1) ............................................5
Manual Spring Charging Check ................................................5
As-Found and Vacuum Check Tests ...........................................5
Automatic Spring Charging Check ............................................5
Final Mechanical Inspections without Control Power ...............5
Vacuum Interrupter/Operator Description ..........................6
Introduction ...............................................................................6
Vacuum Interrupters .................................................................7
Primary Disconnects (Figure 4) .................................................7
Phase Barriers ..........................................................................7
Stored Energy Operating Mechanism ......................................7
Vacuum Interrupter/Operator Module .....................................7
Construction (Figures 1, 2, 5, 6a,and 6b) ..................................8
Circuit Breaker Pole (Figure 5) ..................................................8
Current-Path Assembly (Figure 5) ............................................8
Vacuum Interrupter (Figure 5) ..................................................8
Switching Operation (Figure 5 and 6a) ....................................8
Operating Mechanism .............................................................8
Construction ........................................................................... 11
Motor Operating Mechanism (Figure 6a) ................................11
Mode of Operation ..................................................................11
Charging ..................................................................................11
Closing (Figures 6a, 6b and 7a - 7d) ........................................11
Trip Free Operation (Figures 6a and 6b) ..................................11
Opening (Figure 6a) ................................................................ 11
Rapid Auto-Reclosing ..............................................................15
Manual Operation ...................................................................15
Manually Charging the Closing Spring (Figures 9a and 9b) ....15
Manual Closing (Figure 6a) .....................................................15
Manual Opening (Figure 6a) ....................................................15
Close coil (52SRC) ...................................................................17
Trip coil (52T) ...........................................................................17
Indirect Releases (Secondary Shunt Release
(Dual Trip) (52T1) or Undervoltage (27)).............................. 17
Secondary Shunt Release (52T1) (Figure 11) ......................... 17
Undervoltage Release (27) (Figures 10 and 11) ..................... 17
Construction and Mode of Operation of Secondary Shunt
Release and Undervoltage Release
(Figures 11, 12 and 13) ....................................................... 17
Capacitor Trip Device ...............................................................18
Shock Absorber .......................................................................18
Auxiliary Switch (52a/b) ..........................................................18
Spring Charging Motor (88) ....................................................18
Maintenance .........................................................................
Introduction and Maintenance Intervals ..................................19
Recommended Hand Tools .......................................................19
Recommended Maintenance and Lubrication .........................19
Checks of the Primary Power Path ...........................................20
Cleanliness Check ....................................................................20
Inspection of Flexible Connectors ............................................20
Checks of the Stored Energy Operator Mechanism ................20
Maintenance and Lubrication ..................................................20
Fastener Check .........................................................................22
Manual Spring Charging and Contact Erosion Checks ............22
Electrical Control Checks ..........................................................23
Check of the Wiring and Terminals ...........................................23
Automatic Spring Charging Check
(Control Power Required) ......................................................23
Electrical Close and Trip Check
(Control Power Required) ......................................................25
Checks of the Spring Charging Motor (88) ...............................25
Vacuum Interrupters .................................................................25
Vacuum Integrity Check (using Mechanical Test) (Figure 18)....25
High-Potential Tests ..................................................................25
Vacuum Integrity Check (using Dielectric Test) .........................25
High Potential Test Voltages .....................................................25
Vacuum Integrity Test Procedure ..............................................26
As-Found Insulation and Contact Resistance Tests .................26
Insulation and Contact Resistance Test Equipment .................26
Insulation and Contact Resistance Test Procedure ..................27
Inspection and Cleaning of Circuit Breaker Insulation .............27
Functional Tests ........................................................................27
Overhaul ................................................................................
Introduction ..............................................................................28
Circuit Breaker Overhaul ..........................................................28
Replacement at Overhaul ........................................................28
Replacement of Vacuum Interrupters ......................................28
Hydraulic Shock Absorber ........................................................31
Maintenance and Troubleshooting .....................................
Appendix ...............................................................................
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Cover SGIM-9918-01
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