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Indoor high voltage vacuum circuit breaker (circuit breaker) is suitable for indoor switchgear of 12kv power system. As a protection and control unit for power grid equipment and industrial and mining enterprise power design, it is suitable for switching various loads of different nature, frequent operations, and multiple interruption of short-circuit current.
The product adopts a new type of circuit breaker operating mechanism,
1. The primary part of VSC can use solid-sealed pole poles of international brands, and the vacuum interrupter and main conductive circuit parts can be solid-sealed into a whole
2. Protect the interrupter from impact, dust and condensation
3. Strong environmental adaptability, greatly reducing operation and maintenance costs
4. The operating mechanism is integrated with the circuit breaker body, which has been verified by type tests
5. With E2 electrical life, M12 mechanical life
Environmental requirements
1. Ambient temperature: highest temperature + 4O℃, lowest temperature -15℃
2. Environmental humidity: daily average relative humidity ≤95%, monthly average relative humidity: ≤90%, daily average vapor pressure ≤22×10-3MPa, monthly average vapor pressure ≤1.8×10-3MPa.
3. Altitude: not more than 1000m;
4. The earthquake intensity does not exceed 8 degrees;
5. The surrounding air is not significantly polluted by dust, smoke, corrosive and/or flammable gas, steam or salt spray.
Note: If it exceeds the requirements of the above normal use environmental conditions, it is necessary to negotiate with the manufacturer.
Item | Unit | Data | |||
1 | Rated voltage | 12 | |||
2 | Maximum working voltage | kv | 12 | ||
3 | Rated current | A | 630 1250 | 630 1250 | |
4 | Rated short-circuit break current | kA | 20/25 | 31.5 | |
5 | Rated short-circuit close current (peak value) | kA | 50/63 | 80 | |
6 | Rated withstand current (peak value) | kA | 50/63 | 80 | |
7 | 4S Rated little withstand current | kA | 20/25 | 31.5 | |
8 | Rated insulation level | Industrial frequency withstand voltage | kA | 42/48 | |
Thunder impulse withstand voltage | 75/85 | ||||
9 | Rated operation order | Off-0.3S on and off-180S-on and off | |||
10 | Mechanical life | times | 10000 | ||
11 | Rated short-circuit current break and close time | times | 50 | ||
12 | Speak and move organization amount assign the current of the floodgate(DC) | V | AC.DC.110,220 | ||
13 | Speak and move organization amount equal to the current of the floodgate(DC) | V | AC.DC 110,220 | ||
14 | Switching distance of the contact | mm | >11 | ||
15 | Ultra journey(touches the head spring and compress length) | mm | 4+/-0.5 | ||
16 | Three-phase breaking into shut floodgate sex of the same period | ms | <2 | ||
17 | Touch the head and shut a floodgate of time of bouncing | ms | <2 | ||
18 | Average speed of breaking brake | m/s | 0.9~1.7 | ||
19 | Average speed of closing brake | m/s | 0.6~1.0 | ||
20 | Time of breaking brake | Operate it under the voltage highest | s | <0.05 | |
Operate it under the voltage lowest | <0.08 | ||||
21 | Time of closing brake | s | <0.1 | ||
22 | Each the resistance of main return circuit | u Ω | <45 | ||
23 | Allowance abrasion cumulated thickness of the moving and stationary contact | mm | 3 | ||
