Mid-mounted Solid-sealed Vacuum Load Switch-Fuse Combination Unit
Key attributes
| Brand | ROCKWILL |
| Model NO. | Mid-mounted Solid-sealed Vacuum Load Switch-Fuse Combination Unit |
| Rated voltage | 12kV |
| Rated normal current | 630A |
| Series | RMR |
Product descriptions from the supplier
Description
Product Introduction
RMR‑12 Series Center‑mounted Sealed Pole Vacuum Load Break Switch‑Fuse Combination Apparatus is a new‑generation vacuum switching device developed based on unique design concepts and market demands.It is widely used in indoor armored air‑insulated switchgears.It complies with the standards including GB 3804‑2004 and GB 16926‑1997.Under normal conditions and within its technical parameters,it can operate safely and reliably in power systems of the corresponding voltage level.
Operating Environment
- Ambient Temperature: Maximum +40°C, minimum -25°C.
- Ambient Humidity: Daily average relative humidity ≤ 95%; monthly average relative humidity ≤ 90%.
- Saturated Vapor Pressure: Daily average saturated vapor pressure ≤ 2.2×10⁻³ MPa; monthly average saturated vapor pressure ≤ 1.8×10⁻³ MPa.
- Altitude: Not exceeding 1500 m.
- Seismic Intensity: Not exceeding 8 degrees.
- Application Site: No dripping water, no flammable or explosive hazards, no chemically corrosive gases, and no severe dust.
- Special Note: If the product's operating environment exceeds the above specifications, users may negotiate with our company for confirmation.
Main Technical Parameters
| No. | Item | Unit | Parameter |
|---|---|---|---|
| 1 | Contact Opening Distance | mm | 8–10 |
| 2 | Contact Pressure Spring Stroke | mm | 3–5 |
| 3 | Phase-to-Phase Center Distance | mm | 150 / 210 / 275 |
| 4 | Opening/Closing Asynchronism | ms | ≤ 2 |
| 5 | Contact Bounce Time (Closing) | ms | ≤ 3 |
| 6 | Average Closing Speed | m/s | 0.4–0.8 |
| 7 | Average Opening Speed | m/s | 1.0–1.4 |
| 8 | Closing Time (at Rated Operating Voltage) | ms | ≤ 60 |
| 9 | Opening Time (at Rated Operating Voltage) | ms | ≤ 30 |
| 10 | Main Circuit Resistance | μΩ | ≤ 250 |
| 11 | Allowable Wear Thickness of Moving and Stationary Contacts | mm | 3 |
Technical Parameters
| No. | Item | Unit | RMR-12/T630-20 Vacuum Circuit Breaker | RMR-12/T630-20 Vacuum Circuit Breaker – Fuse Combination Equipment |
|---|---|---|---|---|
| 1 | Rated Voltage | kV | 12 | 12 |
| 2 | Power Frequency Withstand Voltage (Phase-to-Phase, Phase-to-Ground) | kV | 42 | 42 |
| 3 | Lightning Impulse Withstand Voltage (Phase-to-Phase, Phase-to-Ground) | kV | 75 | 75 |
| 4 | Rated Current | A | 630 | 160 (Fuse) |
| 5 | Rated Short-Circuit Breaking Current | kA | - | 50 (Fuse) |
| 6 | Rated Short-Time Withstand Current | kA | 20 | - |
| 7 | Rated Peak Withstand Current | kA | 50 | - |
| 8 | Rated Closing Switching Current | kA | 50 | - |
| 9 | Rated Cable Charging Breaking Current | A | 16 | - |
| 10 | Rated Making Current | A | - | 3150 |
| 11 | Breaking Capacity of Transformer | kVA | 1600 | - |
| 12 | Electrical Life | Cycles | 10,000 | - |
| 13 | Partial Discharge Quantity | pC | ≤ 5 | ≤ 5 |
Technical Data of Spring-Operated Mechanism
| Component Name & Code | Power Consumption (VA/W) | Remarks |
|---|---|---|
| Closing/Locking Electromagnet | Y1 | See notes |
| First Opening Trip Unit | Y2 | 220 |
| Closing Trip Unit | Y3 | 220 |
| Overcurrent Trip Unit | Y7–Y9 | / |
| Undervoltage Trip Unit | Y4 | / |
| Trolley Locking Electromagnet | Y0 | 3 |
Technical Data of Spring-Operated Mechanism
| Item | Unit | Data |
|---|---|---|
| Rated Voltage | V | AC 220, 110; DC 220, 110 |
| Motor Power | W | 90 |
| Energy Storage Time | s | ≤ 8 |
Outline and Mounting Dimensions
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