1. 3AH5 Vacuum Circuit-Breaker For Standard Applications
Siemens Medium Voltage
© Siemens AG 2009
Sector Energy, Business Unit Medium Voltage

2. 3AH5 Vacuum Circuit-Breaker Directory
Technical Data
Portfolio
Product Features
Details
Applications
September 2009

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)
September 2009

4. 3AH5 Vacuum Circuit-Breaker 2. Portfolio
September 2009

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
Your Benefit
Usage for all standard application in medium voltage
Compact dimensions
Maintenance free up to 10,000 operating cycles
September 2009

6. 3AH5 Vacuum Circuit-Breaker 3. Product Features
Column construction
Vacuum interrupters are vertically arranged
Free convection possible
Solid insulation material is minimised as far as possible
Your Benefit
High mechanical stability
Compact dimensions
No forced-cooling up to 2500 A
Very low fire load
Easy access to all parts
September 2009

7. 3AH5 Vacuum Circuit-Breaker 4. Details
Hand crank
coupling
Push button “ON”
Indicator „Closing spring charged“
Counter for “Operating cycles”
Push button “OFF”
Indicator „Closed/Open“
September 2009

8. 3AH5 Vacuum Circuit-Breaker 4. Details
Operating unit
Cooling element
Auxiliary switch
Gearbox
Shunt release
Opening magnet
Closing spring
September 2009

9. 3AH5 Vacuum Circuit-Breaker 4. Details
Secondary equipment
Basic equipped
Fully equipped
September 2009

10. Comparison: Use of Insulation and Plastics
3AH5 Vacuum Circuit-Breaker 4. Details
Comparison: Use of Insulation and Plastics
3AH5 column construction
SION shell construction
Competition embedded pole
12 kV
4 kg
13 kg
17 kg
14 kg
23 kg
2500A
Phase barrier drive
10 kg
PMA 160 mm
Phase barriers
17,5 kV
16 kg
PMA 150/160 mm
Phase barrier
contact arms
September 2009

11. Applications for 3AH5 5. Switching of Standard Applications
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
Industry Application “Refinery”
September 2009

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September 2009