| Marca | ROCKWILL |
| Série | 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.
Estrutura do Tanque Integral: A câmara de extinção de arco, o meio isolante e os componentes relacionados estão selados dentro de um tanque metálico preenchido com gás isolante (como hexafluoreto de enxofre) ou óleo isolante. Isso forma um espaço relativamente independente e selado, efetivamente impedindo que fatores ambientais externos afetem os componentes internos. Este design aumenta o desempenho de isolamento e a confiabilidade do equipamento, tornando-o adequado para vários ambientes externos adversos.
Disposição da Câmara de Extinção de Arco: A câmara de extinção de arco geralmente é instalada dentro do tanque. Sua estrutura é projetada para ser compacta, permitindo uma extinção de arco eficiente em um espaço limitado. Dependendo dos diferentes princípios e tecnologias de extinção de arco, a construção específica da câmara de extinção de arco pode variar, mas geralmente inclui componentes-chave como contatos, bocais e materiais isolantes. Esses componentes trabalham juntos para garantir que o arco seja rapidamente e efetivamente extinto quando o disjuntor interrompe a corrente.
Mecanismo de Operação: Mecanismos de operação comuns incluem mecanismos acionados por mola e mecanismos acionados hidraulicamente.
Mecanismo Acionado por Mola: Este tipo de mecanismo tem uma estrutura simples, é altamente confiável e fácil de manter. Ele impulsiona as operações de abertura e fechamento do disjuntor através do armazenamento e liberação de energia das molas.
Mecanismo Acionado Hidraulicamente: Este mecanismo oferece vantagens como alta potência de saída e operação suave, tornando-o adequado para disjuntores de classe de alta tensão e alta corrente.
1. Selecione o disjuntor correspondente ao nível de tensão com base no nível da rede elétrica
A tensão padrão (40,5/72,5/126/170/245/363/420/550/800/1100kV) é compatível com a tensão nominal correspondente da rede elétrica. Por exemplo, para uma rede de 35kV, seleciona-se um disjuntor de 40,5kV. De acordo com normas como GB/T 1984/IEC 62271-100, a tensão nominal é garantida para ser ≥ a tensão máxima de operação da rede.
2. Cenários aplicáveis para tensões personalizadas não-padrão
Tensões personalizadas não-padrão (52/123/230/240/300/320/360/380kV) são usadas para redes elétricas especiais, como a renovação de redes antigas e cenários industriais específicos. Devido à falta de tensões padrão adequadas, os fabricantes precisam personalizar de acordo com os parâmetros da rede, e após a personalização, o desempenho de isolamento e extinção do arco deve ser verificado.
3. As consequências da seleção de um nível de tensão incorreto
Escolher um nível de tensão baixo pode causar quebra de isolamento, levando a vazamento de SF e danos ao equipamento; Escolher um nível de tensão alto aumenta significativamente os custos, dificulta a operação e pode resultar em problemas de incompatibilidade de desempenho.
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