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Help Center7.2KV 12KV 24KV 36KV High Voltage Fuse 3.15A~25A 31.5A 40A 50A 63A 80A 100A 125A 150A 160A 200A 250A Full Range
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Jinhua Dika Electrical Equipment Co., Ltd. is a specialized manufacturer of high-voltage protection components. Our 7.2kV–36kV Full Range High Voltage Fuse series is engineered for reliable overcurrent protection in medium-voltage distribution systems. With a broad current range from 3.15A to 250A and voltage classes covering 7.2kV, 12kV, 24kV, and 36kV, these fuses offer versatile solutions for transformer protection, switchgear, and capacitor banks. Backed by our ISO-certified quality management system and export experience to over 10 global markets, each fuse delivers consistent performance and safety.
Our full range design ensures complete overcurrent interruption from minimum melting current up to the rated breaking capacity, eliminating partial range gaps. The fuses are manufactured using high-purity ceramic tubes, precision-wound silver or copper fuse elements, and quartz sand arc quenching media. This construction guarantees low power dissipation, fast response, and high short-circuit withstand capability.
Key Features & Benefits
- Full Range Protection: Interrupts both low overloads and high short-circuit currents, meeting the requirements of IEC 60282-1 and similar standards.
- Wide Voltage/Current Selection: Available in 7.2kV, 12kV, 24kV, and 36kV with current ratings from 3.15A up to 250A to match various system configurations.
- High Breaking Capacity: Capable of interrupting fault currents up to 50kA symmetrical, ensuring robust performance under severe fault conditions.
- Low Power Dissipation: Optimized element design reduces heat generation, improving the lifespan of surrounding equipment.
- Compact & Lightweight: Ceramic tube construction offers mechanical strength and excellent insulation properties while keeping dimensions compact for easy installation.
- Striker/Trip Indicator Options: Optional striker pin or mechanical indicator provides visible or electrical signaling of fuse operation.
Technical Specifications (Typical Values)
| Parameter | Value |
|---|---|
| Rated Voltage | 7.2 / 12 / 24 / 36 kV |
| Rated Current Range | 3.15A, 6.3A, 10A, 16A, 20A, 25A, 31.5A, 40A, 50A, 63A, 80A, 100A, 125A, 150A, 160A, 200A, 250A |
| Breaking Capacity (Sym.) | Up to 50 kA (depending on voltage) |
| Peak Withstand | Typically 2.5 x rated current (full range) |
| Operating Temperature | -25°C to +55°C |
| Mounting Position | Any (recommended horizontal for striker) |
| Fuse Tube Material | High strength ceramic (Alumina) |
| Fuse Element Material | Silver or copper alloy |
| Standards | IEC 60282-1, DIN VDE 0670 (available upon request) |
Why Choose Jinhua Dika High Voltage Fuses?
Our manufacturing facility in Jinhua, Zhejiang, China, employs advanced production lines and rigorous testing procedures. Each fuse undergoes routine inspection for resistance, power dissipation, and breaking capacity. With an annual export value of US$1–1.5 million, we serve customers in North America, South America, Europe, Southeast Asia, the Middle East, Africa, and Oceania. Our quality management system is certified under ISO9001, ISO14000, OHSAS18001, and other recognized standards, ensuring consistent product reliability.
We offer flexible packaging and shipping from major ports (Shanghai, Tianjin, Guangzhou, Ningbo). Custom labeling, special striker configurations, and bulk packaging are available upon request. For high-volume or project-based orders, our engineering team can provide technical support and fuse coordination studies.
Invest in Jinhua Dika high voltage fuses for dependable protection of your medium-voltage assets. Contact us today for a quote or sample request. Our dedicated sales and support team is ready to assist with your specific voltage and current requirements.
Frequently Asked Questions (FAQ)
Q1: What is the difference between a full range fuse and a backup fuse?
Full range fuses can safely interrupt all currents from the minimum melting current up to the rated breaking capacity, providing complete overcurrent protection. Backup fuses require a separate overload protection device for low overcurrents.
Q2: Can I use a 24kV rated fuse on a 12kV system?
Yes, a higher voltage rated fuse can be used on a lower voltage system, but the breaking capacity and I²t characteristics should be verified for the application. A 24kV fuse on 12kV will have lower arc energy and may not clear properly in some cases; we recommend selecting the same voltage class as the system.
Q3: What is the typical time-current curve range?
Our full range fuses offer steep melting curves (high-speed, normal, or slow-blow depending on element design). Specific TCC data can be provided upon request for coordination studies.
Q4: Do these fuses have a striker pin for trip indication?
Striker pin or mechanical indicator is available as an optional feature. Please specify when ordering if you require a striker for switchgear alarm circuits.
Q5: What is the ambient temperature correction factor?
For temperatures above 40°C, a derating factor of 0.8% per °C is recommended. Consult our technical sheet for exact values.
Q6: Are replacement fuses available for older switchgear models?
We produce fuses with standard dimensions (e.g., DIN 43625 or other). Please provide the overall length, diameter, and rated current of your existing fuse, and we can confirm compatibility.
Q7: How are the fuses packaged for export?
Standard packaging includes individual foam padding in cartons, with 10–50 pieces per carton depending on size. Special export wooden crates are used for bulk orders to prevent damage during shipping.
Q8: What certifications do your fuses hold?
Our manufacturing facility is certified under ISO9001, ISO14000, OHSAS18001, and other standards. Product certifications such as CB, CE, or UL are available upon request and subject to specific project requirements.
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