The 12kV Indoor High Voltage Vacuum Circuit Breaker is specifically designed for use in 12kV power systems. It serves as an essential component for indoor switchgear applications, providing efficient protection and control for power grid equipment, as well as industrial and mining enterprises. This circuit breaker excels in switching various loads with different characteristics, making it suitable for frequent operations and the ability to interrupt short-circuit currents.
Description
Key Features:
- Rated Voltage: 12kV
- Frequency: 50/60Hz
- Integrated Design: The breaker adopts an integrated design of the operating mechanism, making it robust and reliable.
- Environmental Protection: The circuit breaker is designed to protect the interrupter from impact, dust, and condensation.
- Strong Environmental Adaptability: It can adapt to various environmental conditions, reducing operation and maintenance costs.
- Integrated Operating Mechanism: The operating mechanism is integrated with the circuit breaker body, verified by type tests.
- Long Service Life: It has an E2 electrical life and M12 mechanical life, ensuring longevity and reliability.
Environmental Requirements:
- Ambient Temperature: -15°C to +40°C
- Environmental Humidity: Daily average relative humidity not exceeding 95%, monthly average relative humidity not exceeding 90%.
- Altitude: Not exceeding 1000m
- Earthquake Intensity: Does not exceed 8 degrees
- Environmental Purity: The surrounding air should not be significantly polluted by dust, smoke, corrosive, flammable gases, steam, or salt spray.
Technical Specifications:
| 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 | ||
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