Breaking Capacity: | 12kv 630A-25ka Circuit Breaker |
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Operation: | Energy-storage Type |
Speed: | Normal Type Circuit Breaker |
Arc-extinguishing Medium: | Vacuum |
Installation: | Insert |
Structure: | MCCB |
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No. | Name | Unit | Data | ||||
1 | rated voltage | kV | 12 | ||||
2 | rated frequency | Hz | 50/60 | ||||
3 | rated insulation level | 1 min power frequency withstand voltage | pole to ground, between poles |
kV | 42 | ||
between port | 50 | ||||||
rated lighting impluse withstand voltage | pole to ground, between poles |
75 | |||||
between port | 85 | ||||||
4 | rated current | A | 1250 | 3150 | 4000 | ||
5 | rated short circuit breaking current rated thermal stability current(virtual value) |
kA | 40 | 40 | 50 | ||
6 | rated short circuit closing current(peak value) rated dynamic stability current(peak value) |
kA | 110 | 110 | 137 | ||
7 | rated short-time withstand current duration | s | 2 | ||||
8 | DC component of rated short circuit breaking current | % | 75 | ||||
9 | rated out-of-step symmetry breaking current | kA | 20(DC%≤20%) | ||||
10 | rated out-of-step dissymmetric breaking current | kA | 20(DC%≤75%) | ||||
11 | rated out-of-step symmetry breaking current(peak value) | kA | 28.3 | 35.4 | |||
12 | rated loading current opening time | cycle | 50 | ||||
13 | breaking operations of rated short circuit breaking current | cycle | 5 | ||||
14 | system resource TRV | expected TRV rising rate | kV/μs | 2 | |||
peak voltage | kV | 22 | |||||
coefficient of first opened phase | 1.5 | ||||||
15 | rated operating sequence | CO-30min-CO | |||||
16 | mechanical endurance | cycle | 10000 |
No. | Name | Unit | Data |
1 | contact clearance | mm | 11±1 |
2 | contact stroke | mm | 3.5±0.5 |
3 | contact bouncing duration closing operation | ms | ≤2 |
4 | out of simultaneity of CO operations of three pole | ms | ≤2 |
5 | average opening speed | m/s | 1.45±0.25(contact opened 6mm) |
6 | average closing speed | m/s | 1±0.2(4mm before contact closing) |
7 | opening time | ms | 20~50 |
8 | closing time | ms | 35~70 |
9 | allowed wear thickness of moved and fixed contact | mm | ≤3 |
10 | main circuit resistance of each phase | μΩ | ≤35(1250A)≤25(3150,,4000A) |
rated current(A) | 1250 | 1250 | 4000 |
rated short circuit breaking current(kA) | 40 | 40 | 50 |
matched diameter size of fixed contact | φ79 | φ109 | |
matched size of fixed&moving contact is 15~25mm Min,the primary distance between phases is 275mm | |||
recommended matched size of switchgear room is1000mm |
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