Breaking Capacity: | High Voltage Circuit Breakers |
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Operation: | Electric Type |
Speed: | Normal Type Circuit Breaker |
Arc-extinguishing Medium: | Vacuum |
Installation: | Insert |
Type: | Circuit Breaker |
Customization: |
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Main technical parameter | Value |
Rated voltage | 12kV |
Rated current | 630A |
Rated frequency | 50Hz |
Rated short-time power frequency withstand voltage (1 min) | 42kV |
Rated lightning impulse withstand voltage | 75kV |
Rated short-time withstand current | 20KA |
Rated duration of short-circuit | 4 s |
Rated peak withstand current | 50KA |
Rated short-circuit making current (peak) | 50kA |
Rated active load breaking current | 630A |
Rated closed-loop breaking current | 630A |
Rated cable-charing breaking current | 10A |
Rated breaking current of single capacitor bank | 400A |
Circuit resistance at lowest rated contact force | ≤45μΩ |
Closing force due to bellow and atmosphere | 70±40N |
Force required to hold contacts open at full storke | 120±40N |
Contacts limit erosion | 3mm |
Mechanical endurance | 10000 times |
Weight of movable parts | ≤0.6kg |
Storage life | 20 years |
MECHANICAL DATA RQUIRED FOR THE MATCHEDVACUUM SWITCHGEAR | Value |
Clearance between opening contacts | 8±1mm |
Average opening speed | 1.0±0.2 m/s |
Average closing speed | 0.6±0.2 m/s |
Rated contacts pressure | 900±500N |
Contacts bouncing duration at closing operation | ≤2ms |
Synchronism of three phases | ≤2ms |
Contacts re-bouncing clearance at opening operation | ≤3mm |
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