| Marca | ROCKWILL |
| Serie | RHD |
Product Overview
The RHD Series Dead-Tank SF6 Circuit Breaker is engineered for 'customized high-voltage power system solutions', covering standard voltage grades from RHD-40.5 to RHD-550 and supporting 'non-standard voltage customization' to precisely match your unique grid upgrade or construction needs. As a dead-tank type, its grounded tank isolates high-voltage components, ensuring superior insulation performance and safety--making it the go-to choose for demanding high-voltage scenarios.
About customization
We offer full customization services for voltage classes, including single-phase, two-phase, and three-phase configurations, as well as non-standard voltage/current solutions. Examples of available voltage and current specifications include 1250 A 75 kV, 3200 A 46 kV, 60 kV, 69 kV, and 75 kV (we support customization ranging from 10 kV to 800 kV for voltage and 1250 A to 6300 A for current). Regardless of your power grid's voltage specifications, we tailor the circuit breaker for seamless integration.
All products are fully assembled and tested at our factory before being shipped directly to your site--no disassembly of key components is required. This eliminates the need for on-site high-voltage testing, significantly saving you time and costs.
Key features
1. Superior Seismic Resistance
Adopting a low-center-of-gravity design, the breaker can withstand an earthquake intensity of up to 9 degrees, ensuring stable performance in seismic-prone areas--consistent with the RHD series' proven anti-seismic capability.
2. Excellent Arc-Extinguishing Performance & Long Service Life
Leveraging the high arc-extinguishing efficiency of SF6 gas, the breaker achieves a rated short-circuit breaking current of ≥50kA. It boasts an electrical life of more than 20 operations and a mechanical life of up to 10,000 cycles, significantly reducing equipment replacement and maintenance costs.
3. Low SF6 Gas Leakage Rate
The hermetic metal tank structure minimizes SF6 gas leakage, with an annual leakage rate of ≤1%--far below industry averages. This design not only avoids safety hazards from gas leakage but also reduces environmental impact.
4. Modular Design & Flexible Expansion
It supports on-demand configuration of built-in current transformers (CTs), with up to 15 CTs available for measurement or protection purposes. The standardized module interface allows flexible combination to meet diverse substation design and layout requirements, especially suitable for space-constrained scenarios.
5. Strong Environmental Adaptability
The breaker operates stably in extreme conditions: ambient temperature ranging from -40℃ to +55℃, maximum daily temperature difference of 32K, altitude up to 3,000m, and air pollution level up to Class IV. It also resists wind pressure of 700Pa (equivalent to 34m/s wind speed) and icing thickness of up to 20mm.
6. Comprehensive Safety Protection
Equipped with anti-mis operation interlocking devices, it effectively prevents accidents caused by incorrect operations. Before delivery, the breaker undergoes lightning impulse tests to eliminate insulation discharge risks from production and assembly, ensuring reliable quality.
7. Maintenance-Free Operating Mechanism
It adopts a spring-operated mechanism that is oil-free, gas-free, and maintenance-free. This mechanism delivers stable performance, low noise, and high reliability, reducing long-term operational workload.
Technology Parameters
| Item | Unit | Parameters | |||
| customization of Rated Voltage | kV | 3.6 kV/4.76 kV/7.2 kV/8.25 kV/12 kV /13.2 kV/11kV/12kV/13.8kV/15kV/15.5 kV /17.5 kV/22kV/22.9 kV/24 kV/25.8 kV/27 kV/33kV/36 kV/38 kV/40.5 kV/44kV/60kV/63kV/66kV/69kV/88kV/115kV/123kV/125kV/126kV/132kV/138kV/145kV/ 150kV/170kV/184kV/204kV/220kV/225kV/230kV/245kV/275kV/330kV/345kV/400kV/765kV/800kV |
|||
| customization of Rated current | A | 1250 to 6300 | |||
| Rated frequency | Hz | 50/60 | |||
| 1min Power frequency withstand voltage | kV | Max to 750 | |||
| Lightning impulse withstand voltage | kV | Max to 1675 | |||
| First open pole factor | 1.5/1.3/1.55 | ||||
| Rated short circuit breaking current | kA | 16 to 63 | |||
| Rated short - circuit duration | s | 4,3 | |||
| Rated out - of - phase breaking current | 10 | ||||
| Rated cable charging current | 10/50/125 | ||||
| Rated peak value withstand current | kA | 80/100/125 | |||
| Rated making current (peak) | kA | 80/100/125 | |||
| Creepage distance | mm/kV | 25 - 31 | |||
| SF6 gas leakage rate (per year) | ≤1% | ||||
| Rated SF6 gas pressure(20℃ gauge pressure) | Mpa | 0.5/0.4,0.5,0.6 | |||
| Alarm/blocking pressure(20℃ gauge pressure) | Mpa | 0.45/0.4,0.35/0.33,0.45/0.40,0.55/0.50 | |||
| SF6 annual gas leakage rate | ≤0.5 | ||||
| Gas moisture content | Ppm(v) | ≤150 | |||
| Heater voltage | AC220/DC220 | ||||
| Voltage of control circuit | DC | DC110/DC220/DC230 | |||
| Voltage of energy - store motor | V | DC 220/DC 110/AC 220/DC230 | |||
| Applied standards | GB/T 1984/IEC 62271 - 100 | ||||
| Name | unit | Parameters | |||
| Opening time | ms | 27±3 | |||
| Closing time | ms | 90±9 | |||
| Minute and conjunction time | ms | 300 | |||
| Together--ivide the time | ms | ≤60 | |||
| Simultaneity of opening | ms | ≤3 | |||
| Closing simultaneity | ms | ≤5 | |||
| Moving contact stroke | mm | 150+2-4 | |||
| Contact contact stroke | mm | 27±4 | |||
| Opening speed | m/s | 4.5±0.5 | |||
| Closing speed | m/s | 2.5±0.4 | |||
| Mechanical life | times | 6000 | |||
| Operation sequence | O - 0.3s - CO - 180s - CO | ||||
| Note: The opening and closing speed and time are the characteristic values of the circuitbreaker when it is single divided and closed under rated conditions. The closing speed is theaverage speed of the moving contact from the rigid closing point to 10 ms before closing, andthe opening speed is the average speed of the moving contact within 10 ms from the justequinox to 10 ms after the separation. | |||||
Application Scenarios
Large Hub Substations
Ideal for 220kV+ key hub substations, the customized RHD breaker controls and protects main power circuits. Its non-standard voltage adaptability ensures seamless integration into existing or upgraded grid architecture.
New Energy Grid-Connection Systems
Suitable for high-voltage grid connections in wind and solar power bases. Custom voltage ratings ensure reliable integration of renewable energy into the main grid, even in projects with unique voltage requirements.
Industrial High-Voltage Power Systems
Perfect for heavy industries (metallurgy, chemicals) with specialized voltage needs. The breaker’s robust performance and customizability guarantee stable power supply for high-power industrial equipment.
Estructura Integral del Tanque: La cámara de extinción de arco, el medio aislante y los componentes relacionados están sellados dentro de un tanque metálico lleno de gas aislante (como hexafluoruro de azufre) o aceite aislante. Esto forma un espacio relativamente independiente y sellado, que previene eficazmente que los factores ambientales externos afecten a los componentes internos. Este diseño mejora el rendimiento aislante y la confiabilidad del equipo, haciéndolo adecuado para diversos entornos exteriores adversos.
Disposición de la Cámara de Extinción de Arco: La cámara de extinción de arco generalmente se instala dentro del tanque. Su estructura está diseñada para ser compacta, permitiendo una extinción de arco eficiente en un espacio limitado. Dependiendo de los diferentes principios y tecnologías de extinción de arco, la construcción específica de la cámara de extinción de arco puede variar, pero generalmente incluye componentes clave como contactos, boquillas y materiales aislantes. Estos componentes trabajan juntos para asegurar que el arco se extinga rápidamente y eficazmente cuando el interruptor interrumpe la corriente.
Mecanismo de Operación: Los mecanismos de operación comunes incluyen mecanismos accionados por resorte y mecanismos accionados hidráulicamente.
Mecanismo Accionado por Resorte: Este tipo de mecanismo es simple en estructura, altamente confiable y fácil de mantener. Impulsa las operaciones de apertura y cierre del interruptor a través del almacenamiento y liberación de energía en los resortes.
Mecanismo Accionado Hidráulicamente: Este mecanismo ofrece ventajas como alta potencia de salida y operación suave, lo que lo hace adecuado para interruptores de alta tensión y alta corriente.
1. Seleccione el interruptor de circuito correspondiente al nivel de voltaje según el nivel de la red eléctrica
El voltaje estándar (40,5/72,5/126/170/245/363/420/550/800/1100kV) se ajusta al voltaje nominal correspondiente de la red eléctrica. Por ejemplo, para una red de 35kV, se selecciona un interruptor de circuito de 40,5kV. Según las normas como GB/T 1984/IEC 62271-100, se asegura que el voltaje nominal sea ≥ el voltaje máximo de operación de la red eléctrica.
2. Escenarios aplicables para el voltaje personalizado no estándar
El voltaje personalizado no estándar (52/123/230/240/300/320/360/380kV) se utiliza para redes eléctricas especiales, como la renovación de redes antiguas y escenarios industriales de potencia específicos. Debido a la falta de un voltaje estándar adecuado, los fabricantes necesitan personalizar según los parámetros de la red eléctrica, y después de la personalización, se debe verificar el rendimiento de aislamiento y extinción del arco.
3. Las consecuencias de elegir el nivel de voltaje incorrecto
Elegir un nivel de voltaje bajo puede causar un fallo en el aislamiento, lo que lleva a fugas de SF y daños en el equipo; elegir un nivel de voltaje alto aumenta significativamente los costos, aumenta las dificultades operativas y también puede resultar en problemas de incompatibilidad de rendimiento.
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