12KV 31.5KA Indoor VCB Panel upto 2500A
Advantages of Vacuum over other interrupting media :
1) Highest dielectric strength over a small contact gap
2) Constant Iow contact resistance
3) Fastest recovery strength
4) Lowest arc energy dissipation
5) Lowest drive energy requirements
6) Minimum contact erosion
7) No fire hazards or explosion risks
8) Least number of moving parts and hence highest reliability
Construction
The 3AH5 compact and re liable vacuum circuit breakers consist of three poles incorporating the vacuum interrupters housed in insulated shell. These poles are then covered with insulated pole cover from behind to make the design completely enclosed. The moving contacts of the vacuum interrupter a reconnected to the drive mechanism through insulated connecting rods. Operating mechanism is of stored energy type and suitable for auto reclosing duty. The operation can be manual / electrical as desired. 3AH5 Vacuum Circuit Breaker is housed inside 2 mm thick powder coated sheet metal with fu fly safety interlocked door & bushings for taking further connections by the Partner.
Salient features of 3AH03 Vacuum Circuit Breaker
1) Conforms to IEC 62271-100 and is fully type tested
2) Simple and compact design
3) lnterrupters housed inside an enclosed insulated pole
4) Totally restrike free
5) Suitable for rapid auto reclosing
6) Highly reliable operation
7) Long maintenance free life
8) High switching capability
9) Fully established for all applications
10) Matching drive and interrupter characteristics
11) Trolley mounted for the ease of handling
Partner's Benefits
1) Modular design, enabling Partner's ease for further panel development
2) Fully type tested switchgear
3) Most compact design
4) Lower design cost
5) Maintenance free new generation interrupters from Siemens
Technical Data
Ivac with 3AH5 Vacuum Circuit Breaker |
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Rated Voltage |
upto 12kV |
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One minute power frequency withstand voltage (rms) |
28kV |
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1.2/50 micro second lightening impulse withstand voltage |
75kVp |
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Rated current |
1250A / 2500A |
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Short Time Withstand current (3 sec) |
31.5KA |
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Short Circuit Breaking current |
31.5KA |
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Rated making capacity |
78.75KA |
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Rated Operating sequence |
O-0.3sec-CO-3min-CO |
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Single capacitor bank breaking current |
400A |
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Cable charging breaking current |
25A |
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Guaranteed number of operations for vacuum interrupter at rated current |
10,000 |
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Guaranteed number of operations for drive mechanism |
10,000 |
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Is CB restrike free |
Yes |
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Type of operating mechanism |
Motor Spring Reserve Drive (M.S.R.D.) |
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Switching Application
Ivac with 3AK6 VCB is well suitable for medium voltage power distribution applications like transformer feeder, line feeder in various industries, infrastructure projects and power utilities.