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3AH5 Vacuum Circuit-Breaker For Standard Applications
Siemens Medium Voltage
Sector Energy, Business Unit Medium Voltage© Siemens AG 2009
Sector Energy, Business Unit Medium Voltage© Siemens AG 2009
September 2009Slide 2
1. Technical Data
2. Portfolio
3. Product Features
4. Details
5. Applications
3AH5 Vacuum Circuit-Breaker Directory
Sector Energy, Business Unit Medium Voltage© Siemens AG 2009
September 2009Slide 3
3AH5 Vacuum Circuit-Breaker 1. Technical Data
Rated voltage up to 36 kV
Short-circuit breaking current up to 31,5 kA
Operating current up to 2500 A
Mechanical operating cycles 10,000 (M2)
Electrical operating cycles 10,000 (E2, C2)
Sector Energy, Business Unit Medium Voltage© Siemens AG 2009
September 2009Slide 4
3AH5 Vacuum Circuit-Breaker 2. Portfolio
Sector Energy, Business Unit Medium Voltage© Siemens AG 2009
September 2009Slide 5
3AH5 Vacuum Circuit-Breaker 3. Product Features
Main Data
12, 17,5, 24 & 36 kV
800 to 2500 A
13,1 to 31,5 kA
Up to 10,000 mechanical operating cycles
Type tested according to IEC 62271-100
Your Benefit
Usage for all standard application in medium voltage
Compact dimensions
Maintenance free up to 10,000 operating cycles
Sector Energy, Business Unit Medium Voltage© Siemens AG 2009
September 2009Slide 6
3AH5 Vacuum Circuit-Breaker 3. Product Features
Your Benefit
High mechanical stability
Compact dimensions
No forced-cooling up to 2500 A
Very low fire load
Easy access to all parts
Product Features
Column construction
Vacuum interrupters are vertically arranged
Free convection possible
Solid insulation material is minimised as far as possible
Sector Energy, Business Unit Medium Voltage© Siemens AG 2009
September 2009Slide 7
3AH5 Vacuum Circuit-Breaker 4. Details
Push button “ON”
Push button “OFF”Counter for “Operating cycles”
Indicator „Closed/Open“
Indicator „Closing spring charged“
Hand crankcoupling
Sector Energy, Business Unit Medium Voltage© Siemens AG 2009
September 2009Slide 8
3AH5 Vacuum Circuit-Breaker 4. Details
Auxiliary switch
Gearbox
Cooling element
Operating unit
Shunt release
Closing spring
Opening magnet
Sector Energy, Business Unit Medium Voltage© Siemens AG 2009
September 2009Slide 9
Basic equipped Fully equipped
Secondary equipment
3AH5 Vacuum Circuit-Breaker 4. Details
Sector Energy, Business Unit Medium Voltage© Siemens AG 2009
September 2009Slide 10
3AH5column construction
SIONshell construction
Competitionembedded pole
12 kV 4 kg 13 kg 17 kg
12 kV 4 kg 14 kg 23 kg
2500A Phase barrier drive
12 kV 10 kg 13 kg 17 kg
PMA 160 mm Phase barriers
17,5 kV 10 kg 16 kg 17 kg
PMA 150/160 mm Phase barriers Phase barrier drive
Phase barriercontact arms
3AH5 Vacuum Circuit-Breaker 4. Details
Comparison: Use of Insulation and Plastics
Sector Energy, Business Unit Medium Voltage© Siemens AG 2009
September 2009Slide 11
Applications for 3AH55. Switching of Standard Applications
Industry Application “Refinery”
Requirements
Switching of transformers, drives, capacitors,
filter circuits, overhead lines and cables
Synchronising of parallel networks
Rapid load transfer of consumers to other
incoming feeder
Auto-reclosing in overhead lines to clear
transient faults or short-circuits
Switching of short-circuits
Sector Energy, Business Unit Medium Voltage© Siemens AG 2009
September 2009Slide 12
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