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Help CenterCurrent Limiting Fuse RW11-12KV, for High and Low Fault Current Interruption
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As a professional manufacturer of electrical protection equipment, Jinhua Dika Electrical Equipment Co., Ltd. is proud to introduce our RW11-12KV Current Limiting Fuse. Engineered for reliability in demanding power distribution networks, this fuse is a critical component for safeguarding electrical systems against both high and low magnitude fault currents. With over a decade of experience and a commitment to quality, evidenced by our robust manufacturing certifications, we deliver products that meet the precise needs of utilities and industrial clients worldwide. Our RW11 fuse represents a blend of advanced design and proven technology, offering a dependable and cost-effective solution for overcurrent protection.
The core value of the RW11-12KV fuse lies in its precise current-limiting action. When a fault occurs, it interrupts the circuit rapidly, significantly limiting the peak let-through current and the thermal energy (I²t) let-through. This capability is crucial for protecting downstream equipment like transformers, capacitors, and switchgear from severe damage, thereby minimizing downtime and repair costs. Our manufacturing process, supported by a comprehensive quality management system, ensures each fuse delivers consistent, predictable performance.
Key Features and Technical Advantages:
- Dual Fault Protection: Specifically designed to reliably interrupt a wide range of fault currents, from relatively low values to the maximum interrupting rating, ensuring comprehensive system protection.
- Precision Current Limitation: The fuse element's design ensures a very fast clearing time for high fault currents, dramatically reducing the stress on protected equipment.
- High Voltage Rating: Rated for 12KV systems, making it suitable for primary side protection in distribution substations, industrial plants, and renewable energy installations.
- Robust Construction: Available with a high-strength polymer or porcelain housing that provides excellent mechanical strength, weather resistance, and arc-quenching capabilities.
- Clear Indication: Many variants feature a striker pin or indicator for clear visual confirmation of fuse operation, aiding in quick maintenance and system restoration.
- Flexible Mounting: Can be supplied in drop-out (expulsion) or fixed mount versions to suit different switchgear and application requirements.
The following table outlines some typical specifications for the RW11-12KV Current Limiting Fuse. Please note that specific parameters can be customized based on your project requirements.
| Parameter | Typical Specification / Description |
| Rated Voltage (Ur) | 12 kV |
| Rated Current (Ir) | Available in a range from 6.3A to 200A (customizable) |
| Interrupting Rating | High, designed to meet or exceed standard requirements (e.g., 50kA symmetrical) |
| Power Frequency Withstand Voltage | 42 kV (1 min, dry) |
| Impulse Withstand Voltage | 75 kV (Lightning impulse) |
| Time-Current Characteristic | Standard TCC curves (K, T, etc.) available; can be tailored |
| Operating Temperature Range | -40°C to +85°C |
Benefits for Your Operations:
- Enhanced System Reliability: By preventing fault currents from reaching destructive levels, our fuse helps avoid catastrophic failures, leading to higher overall system availability.
- Reduced Total Cost of Ownership: Protects expensive capital equipment, lowering lifetime maintenance and replacement costs. The fuse itself is a cost-effective protective device.
- Improved Safety: Limits the arc energy and potential for equipment rupture, creating a safer environment for personnel and facilities.
- Selective Coordination: Well-defined time-current characteristics allow for easy coordination with upstream and downstream protection devices, ensuring only the faulty section is isolated.
- Global Application Suitability: Designed to be compatible with various international electrical standards, facilitating use in projects across our main markets from North America to Southeast Asia.
Jinhua Dika Electrical backs the RW11-12KV fuse with a solid foundation of manufacturing excellence. Our company operates with multiple international quality and management system certifications, ensuring a controlled and professional production environment. With an annual export value reflecting our global reach and a dedicated team of 11-50 professionals, we have the capacity and expertise to support your projects. We ship from major Chinese ports like Shanghai, Tianjin, Guangzhou, and Ningbo, ensuring efficient logistics to destinations worldwide. Choose our current limiting fuse for a protection solution that combines technical performance with the reliability of an established manufacturer. Contact us today to discuss your specific requirements or to request detailed technical documentation.
Frequently Asked Questions (FAQ)
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What is the primary difference between a current limiting fuse and a standard expulsion fuse?
A current limiting fuse interrupts a fault within the first quarter cycle of the prospective current, drastically limiting the peak current and thermal let-through energy. A standard expulsion fuse may take longer to clear, allowing a higher let-through current, which can cause more stress on protected equipment. -
Can the RW11-12KV fuse be used for transformer protection?
Yes, it is commonly used for the primary side protection of distribution transformers. Its current-limiting characteristic is particularly beneficial in limiting the stress from through-fault currents on the transformer windings. -
How do I select the correct rated current for my application?
The selection depends on the full load current of the protected circuit and the required overload capability. It's crucial to consider the transformer inrush current, motor starting currents, and ambient temperature. Our technical team can assist you with the selection based on your system data. -
Is the striker pin feature standard on all models?
The striker pin or indicator is a common feature but may be optional depending on the specific model and configuration. Please specify your requirement for a indicating function when inquiring. -
What standards does this fuse comply with?
Our fuses are designed to meet common international standards such as IEC 60282-1 or relevant ANSI/IEEE standards. The specific standard compliance can be confirmed based on your order specifications and target market. -
What is the typical lead time for an order?
Lead times vary based on order quantity, customization requirements, and current production schedule. Standard configurations typically have shorter lead times. We provide estimated timelines upon receipt of your detailed inquiry. -
Do you provide technical support for system coordination studies?
Yes, we can provide the necessary time-current characteristic (TCC) curves and data sheets to assist your engineering team in performing protection coordination studies for your electrical system. -
Can you produce fuses with custom time-current characteristics?
We have the capability to tailor certain characteristics based on project needs. Customization options are available upon request and require detailed technical discussions.
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