The porcelain housed fuse cutout disconnects circuits when current exceeds specified values by melting the fuse link through its own heat. Widely deployed in high and low voltage distribution systems, it provides overload and short circuit protection for transformers, lines, and electrical equipment. Manufactured to ISO9001 standards and compliant with IEC and NEMA specifications, the device offers high breaking capacity and reliable performance across diverse electrical environments.
The structure comprises three components: a porcelain insulator body that isolates conductive parts from supports, a fuse holder (insulating tube) containing replaceable elements that drops to indicate disconnection, and the fuse link itself that melts during overcurrent conditions. This design ensures both protection and visible confirmation of circuit interruption.
Fuse link characteristics depend on material selection: low melting point metals like lead suit lower breaking capacities with larger cross-sections, while high melting point materials like copper and silver enable higher breaking capacities with smaller cross-sections and reduced vapor. Filamentous or banded shapes with variable sections allow customized melt characteristics for specific protection requirements.
Technical specifications include rated voltages from 10kV to 36kV, rated currents of 100A or 200A, creepage distances from 250mm to 720mm, power frequency withstand voltages between 40kV and 95kV, and impulse withstand voltages up to 200kV. Breaking capacity reaches 12,000A across different models and applications.
Trusted Porcelain Housed Fuse Cutout Supplier with 21 Years of Expertise
The RaxPower Porcelain Housed Fuse Cutout is an electrical protection device that disconnects a circuit by causing the fuse link to melt when overcurrent occurs, ensuring system safety. It features the following:
- A robust porcelain body for insulation
- A fuse holder that drops to indicate operation
- A replaceable fuse link for easy maintenance
This product is widely used in high and low voltage distribution networks to protect transformers, capacitors, and other equipment from short circuits and overloads.
RaxPower is an experienced manufacturer specializing in fuse cutout production, with 21 years of expertise since its establishment in 2003. Based in Hebei Province, China, our company operates from 17,000 square meters of production workshops and 5,000 square meters of warehouses, supported by a team of over 170 professionals. Our advanced manufacturing processes, including hot forging for enhanced strength and precise sizing, directly contribute to the durability and reliability of our Porcelain Housed Fuse Cutouts. We offer a comprehensive range from 11kV to 33kV, with thousands of units sold globally, backed by strict quality control such as raw material selection, multi-stage testing, and compliance with international standards. This customer-focused approach ensures high performance and long service life for all our products.
Contact us for purchases or to resolve any technical problems.
| Type | Rated Voltage (kV) | Rated Current (A) | Breaking Current (A) | Impulse Withstand Voltage (kV) | Power-Frequency Withstand Voltage (kV) | Creepage Distance (mm) | Weight (kg) | Standards |
|---|---|---|---|---|---|---|---|---|
| RW12-12 | 12 | 100 | 10000 | 110 | 50 | 250 | 7.3 | IEC, NEMA |
| RW12-12 | 12 | 200 | 12000 | 110 | 50 | 250 | 7.3 | IEC, NEMA |
| RW12-24 | 24 | 100 | 10000 | 150 | 70 | 350 | 8.8 | IEC, NEMA |
| RW12-24 | 24 | 200 | 12000 | 150 | 70 | 350 | 8.8 | IEC, NEMA |
| RW12-24 | 24 | 100 | 10000 | 150 | 70 | 540 | 8.8 | IEC, NEMA |
| RW12-24 | 24 | 200 | 12000 | 150 | 70 | 540 | 8.8 | IEC, NEMA |
| RW12-36 | 36 | 100 | 10000 | 170 | 95 | 600 | 15.5 | IEC, NEMA |
| RW12-36 | 36 | 200 | 12000 | 170 | 95 | 600 | 15.8 | IEC, NEMA |
| RW12-36 | 36 | 100 | 10000 | 200 | 95 | 720 | 16.0 | IEC, NEMA |
| RW12-36 | 36 | 200 | 12000 | 200 | 95 | 720 | 16.4 | IEC, NEMA |
Frequently Asked Questions (FAQS)
What is a porcelain housed fuse cutout and how does it operate?
A porcelain housed fuse cutout is an electrical device that disconnects a circuit when current exceeds a specified value. It consists of a fuse link, a porcelain insulator body, and a fuse holder. During a fault, the fuse link melts due to overcurrent, producing an arc that is extinguished by the fuse tube. The fuse holder then drops and hangs from a hinge, providing visible indication of circuit disconnection. It can also be operated manually using a hot stick. Widely used in high and low voltage distribution systems, it protects against overload and short circuits.
What are the technical specifications?
The rated voltage ranges from 10kV to 36kV, with rated current options of 100A and 200A. Power frequency withstand voltage ranges from 40kV to 95kV depending on the model. Minimum creepage distance ranges from 250mm to 720mm to ensure adequate insulation. The fuse cutout body is made of porcelain, the fuse tube from phenolic compound paper or epoxy glass, and contacts are silver-to-silver for reliable conductivity. The product complies with IEC 60282-2 and NEMA standards.
What quality assurance and experience does RaxPower offer?
RaxPower employs ISO9001-certified quality control with strict raw material selection, multi-stage testing, and load tests to ensure reliability and complete standards compliance. With over 21 years of manufacturing experience, we have supplied thousands of units worldwide, with products passing authoritative tests like SGS, making us a trusted partner for large-scale utility grid expansions and renewable energy installations.
Do you provide customization and support for project-specific requirements?
Yes, RaxPower offers dedicated technical support and customization options to meet specific project needs, including applications for railway electrification and telecommunications. We utilize automated manufacturing and efficient processes for fast production times, competitive pricing through a robust supply chain, and on-time delivery for bulk orders, making us reliable for EPC contractors and distributors.
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