Siemens
38-3AH3 38 kV
instruction manual
Typical for all three-phases
Permissible tripping delay Y
Wiring and terminals check
Maintenance
Current-path assembly
Handling procedure
Phase barriers
Setting
Cleanliness check
Replacement at overhaul
Auxiliary switch
Page 45
Maintenance
Figure 39: Operator mechanism lubrication
Klüber L32 or Klüber L32N
Typical for all
three-phases
45
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Image 45
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Contents
Answers for energy
Qualified person
Table of contents
Signal words Hazardous Procedures
Introduction
Introduction
Introduction
Field service operation and warranty issues
Introduction Receiving procedure
Receiving, handling and storage
Shipping damage claims
Receiving, handling and storage
Handling procedure
Indoor storage
Storage procedure
Outdoor storage
Space heating
Installation checks and functional tests
Inspections, checks and tests without control power
De-energizing control power in switchgear
Installation checks and functional tests
Type 38-3AH3 vacuum circuit breaker racking
Racking crank engagement procedure
Manual-spring charging check
Physical inspections
Split-plug jumper connected to circuit breaker
Final mechanical inspections without control power
Vacuum interrupter/ operator
Vacuum interrupters
Vacuum interrupter/ operator
Phase barriers
Primary disconnects
Stored-energy operating mechanism
Construction
Interrupter/operator module
Switching operation
Current-path assembly
Circuit-breaker pole
Vacuum interrupter
Type 38-3AH3 vacuum circuit breaker pole section
Stored-energy operating mechanism
Mode of operation
Auxiliary switch
Operating mechanism
Indirect releases tripping coils
Use of manual-spring operation crank
Closing
Opening
Trip-free functionality
Rapid auto-reclosing
Manual operation
62.2 62.5.2 50.3.1 53.0
Pawl roller 62.5.2 Close-latch pawl
Vacuum interrupter/ operator
Discharged
Closing
Standard
Undervoltage optional
Indirect releases dual-trip or
Secondary shunt release optional
54.2
Position a locked
Capacitor-trip device
Shock absorber
Secondary disconnect
Truck-operated cell TOC switch
Mechanism-operated cell MOC switch optional
Shutter-operating linkage Secondary disconnect Shutters
Rating interlock
Trip-free interlock
Circuit-breaker frame
Ground disconnect
Vehicle function and operational interlocks
Racking mechanism
Alignment
Interlocks Circuit breaker racking-interlocks
Racking interlocks Closed circuit breaker interlock
Automatic closing-spring energy release
Trip-free interlock position mechanical interlock
Introduction and maintenance intervals
Maintenance
Recommended hand tools
Maintenance
Inspection items and tests
Recommended maintenance and lubrication
Removal from switchgear
Checks of the primary power path
Cleanliness check
Circuit Number
Maintenance and lubrication
Inspection of primary disconnects
Checks of the stored-energy operator mechanism
Typical for all three-phases
Manual-spring charging and contact- erosion checks
Fastener check
Automatic spring-charging check control power required
Wiring and terminals check
Electrical-control checks
Secondary-disconnect check
Typical vacuum interrupter contact curve
Vacuum-interrupter mechanical check
Spring-charging motor checks
Vacuum-integrity check using dielectric test
High-potential tests
High-potential test voltages
Voltage Frequency withstand
Field-test voltage
Continuous Contact
Inspection and cleaning of circuit- breaker insulation
Rating a
Functional tests
Overhaul
Replacement at overhaul
Circuit-breaker overhaul
Circuit breaker Number Type
Overhaul
Vacuum interrupter replacement
Setting
Vacuum interrupter replacement illustration
Overhaul
Hydraulic shock absorber
Checking the contact stroke Open the circuit breaker
Sub-assembly Inspect for
Maintenance and troubleshooting
Problem Symptoms Possible causes and remedies
Maintenance and troubleshooting
Closed
Appendix
Appendix
Maximum design voltage
Permissible tripping delay Y
Values Voltage Voltage range factor K3 Insulation Withstand
Voltage levels Lightning-impulse BIL
Levels Voltage levels Lightning-impulse BIL
Rated Maximum design voltage
Rated Continuous4
Short-circuit at rated maximum design voltage I5, 6
Remarks
Appendix
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