GE GL 311 F3/4031 P/VE

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INSPECTION AND MAINTENANCE

80 / 146 OI 250 (EN) REV7 /REV3

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Table of Contents3
Introduction7
Safety11
Safety Instructions11
Handling Sulfur Hexafluoride13
Safety Precautions When Handling SF613
Oxygen Displacement13
Mechanical Handling13
Frostbite14
Safety Precautions When Handling Used SF615
Transport at the Installation Site16
Components Supplied17
Scope of Supply (Standard)17
Scope of Supply (Optional)18
Transport and Storage19
Transport and Handling19
Storage20
Installation21
Preparing for Installation21
Documentation21
Checklist21
Materials and Equipment to be Provided by Customer24
Use of Auxiliary Materials and Supplies24
Unpacking the Transport Units24
Pole Column25
Unpacking Pole Column with Composite Insulator26
Unpacking Pole Column with Porcelain Insulators27
Operating Mechanism29
Lattice Supports30
Assembling the Lattice Supports30
Premounting the Lattice Supports31
Aligning the Lattice Supports32
Mounting the Connecting Brackets33
Mounting the Density Monitor and Filler Block to Pole B35
Mounting the Mechanism on Pole B36
Installing the Pole Columns39
Erecting the Pole Columns39
Positioning the Pole Columns41
Connecting the Drive Rod to the Drive Lever42
Connecting the Operating Mechanisms and Pole Columns43
Aligning the Pole Columns Using a Tire Lever (if Required)44
Mounting the High Voltage Terminal Pads45
Connecting the Cables46
Earthing (Grounding) the Circuit Breaker47
Commissioning49
Density Monitor49
Connecting the Cable49
Gas Piping50
Installing the Gas Piping for Circuit Breaker with One Density Monitor (Standard Configuration)51
Installing the Gas Piping for Circuit Breaker with Three Density Monitors (Optional Configuration)53
Checking the Operating Points54
Connecting the Gas Piping to the Pole Columns55
Filling the Breaker with Gas56
Checking the Anti-Condensation Heater58
Connecting the Supply and Control Cables58
Functional Testing59
Test Operations59
Measuring the Running Time of the Charging Motor59
Measuring the Contact Resistance60
Measuring the Operating Times60
Checking Manual Operation61
Manually Charging the Closing Spring62
Checking the Anti-Pumping System63
Check Synchronized Operation63
Checking the Functional Lockout63
Operations Counter63
Final Tasks64
Troubleshooting65
Electrical Switching Commands Are Not Correctly Executed65
Mechanism Reconditioning Procedures66
Replacing the Charging Motor66
Replacing the Closing and Opening Coil67
Replacing the Operations Counter68
Replacing the Motor Limit Switch And/Or the Auxiliary Switch69
Replacing the Density Monitor71
Replacing a Gas Connection73
Inspection and Maintenance75
Ordering Accessories and Replacement Parts77
Inspection77
Visual Inspection77
Anti-Condensation Heater77
Checking Gas Pressure77
Maintenance78
Checking the Cable Connections78
Checking the Connecting Linkage78
Checking the Control Circuits78
Checking the Gas Quality79
Checking the Contact Resistance79
Checking the Operating Times79
Checking the Threaded Connections79
Reconditioning81
Reconditioning the Interrupter Chamber82
Disconnecting the Interrupter Chamber from the Post Insulator82
Removing the Double Motion System84
Removing the Guide Shaft85
Disconnecting the Making and Breaking Units86
Reconditioning the Movable Contact System86
Reconditioning the Fixed Contact87
Lubricating the Interrupter Unit87
Connecting the Making and Breaking Units88
Mounting the Guide Shaft90
Reconditioning the Holder91
Installing the Double Motion System92
Adjusting the Double Motion System94
Connecting the Interrupter Chamber to the Post Insulator95
Replacing the Adsorption Filter97
Final Operations98
Disassembling the Post Insulator and Crankcase98
Disassembling the Opening Springs99
Disassembling the Crankcase100
End-Of-Life Management103
Special Equipment (Optional)105
Easycheck Density Monitor Unit105
Functional Description106
Operating Condition107
Test Condition108
Flexlink-Gas Connection109
Setup of the Flexlink-Gas Connction109
If Flexlink Gas Piping Is Already Installed110
Flexlink Gas Piping Still Needs to be Installed111
Exchange of Flexlink Gas Connections112
A1 Description of the Equipment115
A1.1 Purpose115
A1.2 Main Components115
A1.3 Operation115
A2 Tools and Auxiliary Equipment117
A2.1 Customer-Supplied Materials and Equipment for Installation117
And Commissioning117
A2.2 Materials117
A2.3 Hoisting and Climbing or Lifting Equipment117
A2.4 Tools, Test Equipment and Auxiliary Equipment117
A2.4.1 Tool Recommendations118
A2.5 Greases for Installation, Commissioning and Maintenance121
A2.6 Locking Adhesives for Installation, Commissioning and Maintenance122
A2.7 Measuring Devices for Checking Gas Quality122
A2.8 Tools for Reconditioning123
A2.9 Auxiliary Materials and Supplies124
A3 Replacement Parts and Accessories125
A3.1 Servicing Equipment126
A3.2 Replacement of Arcing Contacts127
A3.3 Replacement Parts for Installation Work on Post Insulator and Crankcase127
A4 Handling Used Sulfur Hexafluoride129
A5 Technical Description131
A5.1 Technical Data: Circuit Breaker131
A5.2 Technical Data: Spring Operating Mechanism132
A6 Slow Operation for Maintenance Purposes133

GE GL 311 F3/4031 P/VE - Page 80

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