Siemens
38-3AH3 38 kV
instruction manual
Remarks
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 66
Appendix
Table 14: Remarks
66
Page 65
Page 67
Image 66
Page 65
Page 67
Contents
Answers for energy
Qualified person
Table of contents
Signal words Hazardous Procedures
Introduction
Introduction
Field service operation and warranty issues
Introduction
Introduction Receiving procedure
Receiving, handling and storage
Shipping damage claims
Handling procedure
Receiving, handling and storage
Outdoor storage
Storage procedure
Indoor 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
Racking crank engagement procedure
Type 38-3AH3 vacuum circuit breaker racking
Physical inspections
Manual-spring charging check
Final mechanical inspections without control power
Split-plug jumper connected to circuit breaker
Vacuum interrupter/ operator
Vacuum interrupter/ operator
Vacuum interrupters
Phase barriers
Primary disconnects
Stored-energy operating mechanism
Interrupter/operator module
Construction
Circuit-breaker pole
Current-path assembly
Switching operation
Vacuum interrupter
Type 38-3AH3 vacuum circuit breaker pole section
Stored-energy operating mechanism
Operating mechanism
Auxiliary switch
Mode of operation
Indirect releases tripping coils
Closing
Use of manual-spring operation crank
Rapid auto-reclosing
Trip-free functionality
Opening
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
Secondary shunt release optional
Indirect releases dual-trip or
Undervoltage optional
54.2
Position a locked
Capacitor-trip device
Shock absorber
Secondary disconnect
Mechanism-operated cell MOC switch optional
Truck-operated cell TOC switch
Shutter-operating linkage Secondary disconnect Shutters
Circuit-breaker frame
Trip-free interlock
Rating interlock
Ground disconnect
Alignment
Racking mechanism
Vehicle function and operational interlocks
Interlocks Circuit breaker racking-interlocks
Racking interlocks Closed circuit breaker interlock
Automatic closing-spring energy release
Trip-free interlock position mechanical interlock
Maintenance
Introduction and maintenance intervals
Maintenance
Recommended hand tools
Recommended maintenance and lubrication
Inspection items and tests
Removal from switchgear
Checks of the primary power path
Cleanliness check
Inspection of primary disconnects
Maintenance and lubrication
Circuit Number
Checks of the stored-energy operator mechanism
Typical for all three-phases
Fastener check
Manual-spring charging and contact- erosion checks
Electrical-control checks
Wiring and terminals check
Automatic spring-charging check control power required
Secondary-disconnect check
Typical vacuum interrupter contact curve
Spring-charging motor checks
Vacuum-interrupter mechanical check
Vacuum-integrity check using dielectric test
High-potential tests
High-potential test voltages
Field-test voltage
Voltage Frequency withstand
Rating a
Inspection and cleaning of circuit- breaker insulation
Continuous Contact
Functional tests
Circuit-breaker overhaul
Replacement at overhaul
Overhaul
Circuit breaker Number Type
Vacuum interrupter replacement
Overhaul
Setting
Vacuum interrupter replacement illustration
Overhaul
Checking the contact stroke Open the circuit breaker
Hydraulic shock absorber
Maintenance and troubleshooting
Sub-assembly Inspect for
Maintenance and troubleshooting
Problem Symptoms Possible causes and remedies
Closed
Appendix
Appendix
Values Voltage Voltage range factor K3 Insulation Withstand
Permissible tripping delay Y
Maximum design voltage
Voltage levels Lightning-impulse BIL
Rated Continuous4
Rated Maximum design voltage
Levels Voltage levels Lightning-impulse BIL
Short-circuit at rated maximum design voltage I5, 6
Remarks
Appendix
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