Siemens 38-3AH3 38 kV instruction manual Appendix

Page 63

Appendix

Table 10: Type 38-3AH3 vacuum circuit breaker weight in lbs (kg)1, 2, 3

Continuous current

 

Circuit breaker type

 

 

 

 

 

A

38-3AH3-31

38-3AH3-40

38-3AH3-1500

 

 

 

 

1,200

800 (364)

850 (387)

800 (364)

 

 

 

 

2,000

900 (409)

950 (432)

900 (409)

 

 

 

 

3,000

1,000 (455)

1,050 (478)

1,000 (455)

 

 

 

 

Footnotes:

1.Weight estimates are for circuit breaker only. Add 125 lbs (57 kg) for packaging.

2.Weight and dimensions are approximate..

3.Approximate circuit breaker dimensions in inches (mm) (W x D x H):

Net 44" (1,117 mm) x 46" (1,168 mm) x 51" (1,294 mm)

Packed for shipment separate from switchgear: 48" (1,218 mm) x 48" (1,218 mm) x 60" (1,522 mm).

Table 11: Circuit breaker operating times (type 3AH3 operator)

Spring charging time

 

 

 

 

 

 

Close time from energizing close coil at rated

 

38 kV

control voltage to contact touch (last pole)

 

 

 

 

 

 

 

Opening time from energization trip coil

 

5-cycle interrupting time (83 ms)

38 kV

at rated control voltage to contact part

 

 

 

 

3.5-cycle interrupting time (58 ms)

38 kV

(last pole), not including arcing time

 

 

 

 

 

3-cycle interrupting time (50 ms)

38 kV

 

 

 

 

 

 

≤10 s

≤70 ms

≤56 ms

≤43 ms

≤38 ms

63

Page 62 Page 64
Image 63
Page 62 Page 64
Contents Answers for energy Qualified person Table of contents Signal words Hazardous Procedures IntroductionIntroduction Introduction Field service operation and warranty issuesIntroduction Receiving procedure Receiving, handling and storageShipping damage claims Receiving, handling and storage Handling procedureSpace heating Storage procedureIndoor storage Outdoor storageInstallation checks and functional tests Inspections, checks and tests without control powerDe-energizing control power in switchgear Installation checks and functional tests Type 38-3AH3 vacuum circuit breaker racking Racking crank engagement procedureManual-spring charging check Physical inspectionsSplit-plug jumper connected to circuit breaker Final mechanical inspections without control powerVacuum interrupter/ operator Vacuum interrupters Vacuum interrupter/ operatorPhase barriers Primary disconnectsStored-energy operating mechanism Construction Interrupter/operator moduleVacuum interrupter Current-path assemblySwitching operation Circuit-breaker poleType 38-3AH3 vacuum circuit breaker pole section Stored-energy operating mechanism Indirect releases tripping coils Auxiliary switchMode of operation Operating mechanismUse of manual-spring operation crank ClosingManual operation Trip-free functionalityOpening Rapid auto-reclosing62.2 62.5.2 50.3.1 53.0 Pawl roller 62.5.2 Close-latch pawl Vacuum interrupter/ operator Discharged Closing Standard 54.2 Indirect releases dual-trip orUndervoltage optional Secondary shunt release optionalPosition a locked Capacitor-trip device Shock absorberSecondary disconnect Truck-operated cell TOC switch Mechanism-operated cell MOC switch optionalShutter-operating linkage Secondary disconnect Shutters Ground disconnect Trip-free interlockRating interlock Circuit-breaker frameInterlocks Circuit breaker racking-interlocks Racking mechanismVehicle function and operational interlocks AlignmentRacking interlocks Closed circuit breaker interlock Automatic closing-spring energy release Trip-free interlock position mechanical interlock Introduction and maintenance intervals MaintenanceRecommended hand tools MaintenanceInspection items and tests Recommended maintenance and lubricationRemoval from switchgear Checks of the primary power pathCleanliness check Checks of the stored-energy operator mechanism Maintenance and lubricationCircuit Number Inspection of primary disconnectsTypical for all three-phases Manual-spring charging and contact- erosion checks Fastener checkSecondary-disconnect check Wiring and terminals checkAutomatic spring-charging check control power required Electrical-control checksTypical vacuum interrupter contact curve Vacuum-interrupter mechanical check Spring-charging motor checksVacuum-integrity check using dielectric test High-potential testsHigh-potential test voltages Voltage Frequency withstand Field-test voltageFunctional tests Inspection and cleaning of circuit- breaker insulationContinuous Contact Rating aCircuit breaker Number Type Replacement at overhaulOverhaul Circuit-breaker overhaulOverhaul Vacuum interrupter replacementSetting Vacuum interrupter replacement illustration Overhaul Hydraulic shock absorber Checking the contact stroke Open the circuit breakerSub-assembly Inspect for Maintenance and troubleshootingProblem Symptoms Possible causes and remedies Maintenance and troubleshootingClosed Appendix Appendix Voltage levels Lightning-impulse BIL Permissible tripping delay YMaximum design voltage Values Voltage Voltage range factor K3 Insulation WithstandShort-circuit at rated maximum design voltage I5, 6 Rated Maximum design voltageLevels Voltage levels Lightning-impulse BIL Rated Continuous4Remarks Appendix

38-3AH3 38 kV specifications

The Siemens 38-3AH3 is a high-voltage circuit breaker designed for medium voltage applications, particularly in substations and industrial environments. This device operates at a voltage level of 38 kV, showcasing Siemens' commitment to innovation and reliability in electrical engineering.

One of the main features of the Siemens 38-3AH3 is its advanced interruption technology, which employs the proven hybrid design combining both gas-insulated and air-insulated technologies. This hybrid approach not only enhances the breaker's performance and reliability but also minimizes its footprint, making it an ideal choice for space-constrained environments.

The Siemens 38-3AH3 uses vacuum interruption technology, allowing for efficient switching with minimal wear and tear. The vacuum interrupters are highly reliable and provide excellent performance under various operating conditions. This technology ensures that the circuit breaker can handle short circuits and overloads effectively, thus protecting the entire electrical system.

Additionally, the Siemens 38-3AH3 incorporates intelligent monitoring systems. These digital technologies provide real-time data on breaker status, operational performance, and maintenance needs. This predictive maintenance capability helps operators to identify potential issues before they develop into significant problems, ultimately leading to reduced downtime and maintenance costs.

Another notable characteristic of the Siemens 38-3AH3 is its high insulation strength. Thanks to its robust design and development, this circuit breaker can withstand adverse environmental conditions, making it suitable for use in diverse geographical locations and climates. Its components are designed to resist contamination and corrosion, ensuring long-term reliability.

The Siemens 38-3AH3 also offers enhanced safety features. It includes protective relays and automatic fault detection systems that isolate faults quickly, preventing damage to downstream equipment. Furthermore, the design allows for easy maintenance, with components that are accessible without the need for extensive disassembly.

In summary, the Siemens 38-3AH3 38 kV circuit breaker is a leading solution in high-voltage protection and control, characterized by its advanced interruption technology, integrated monitoring systems, high insulation strength, and user-friendly maintenance features. Its innovative design and engineering make it a trusted choice for utilities and industrial facilities aiming to enhance the reliability and safety of their electrical systems.
Top Page Image Contents