Product Description
Comprehensive Overview
Elevate your power distribution systems with the pinnacle of innovation: the Drop-out Fuse and Pull Load Drop-out Fuse. These outdoor high-voltage marvels serve as the ultimate guardians in electrical protection. Strategically positioned on the high-voltage side of distribution transformers or as pivotal support links within distribution lines, they offer an unmatched shield against transformer and line short circuits and overload scenarios, while ensuring seamless current management for opening and loading procedures. Crafted with precision, the drop-out fuse features an insulating bracket and fuse tubes, which secure static contacts at each end, with elegantly placed moving contacts at the ends of the fuse tube. The fuse tube itself showcases an advanced inner arc tube, expertly paired with a durable outer phenolic paper tube or an epoxy glass cloth tube. The Pull Load Drop-out Fuse enhances versatility with its auxiliary contacts and a meticulously designed arc chute, ensuring smooth transitions and impeccable current load management.
In normal conditions, the drop-out fuse stands firmly fastened, with the fuse tube held under calculated tension. Upon detection of system faults, the fault current instantly acts to blow the fuse, creating a dynamic arc that ignites the arc tube. This process decomposes a significant volume of gas, generating heightened internal pressure and establishing a vertical wind pathway that stretches and elongates the arc with finesse. As the fuse blows, the moving contact rotates outwardly with grace, and the locking mechanism disengages, allowing the fuse tube to drop into a definitive open position. For load pulling, an insulating rod is employed to extract the moving contact, maintaining its connection with the static contact. With continuous force, auxiliary contacts separate, producing an arc that stretches within the hood slit. The arc cover efficiently contains the gas, enabling swift arc extinguishment as the current nears zero.
Applications and Compliance Standards
This exemplary product is engineered for seamless integration into 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It offers steadfast protection against overloads and short circuits, while skillfully enabling the separation and combination of the rated load current, ensuring optimal performance and reliability.
Designed with precision and adherence to the highest standards, this product complies with the rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation. Its specifications are aligned with the esteemed GB15166.3-1994 standards for high voltage fuses and Expulsion fuses. Where explicit definitions are absent, adjustments are skillfully tailored according to the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses, ensuring reliability and compliance.
Discover the epitome of outdoor high-voltage protective devices with the Drop-out Fuse Cutout and Load Switching Fuse Cutout. Meticulously crafted to connect seamlessly with the incoming feeder of distribution transformers or lines, they play a vital role in protecting transformers and lines from short circuit incidents and overload conditions, while effectively managing the on/off load current. The drop-out fuse cutout comprises robust insulating supports and a sophisticated fuse tube, with static contacts fixed on both sides and moving contacts impeccably positioned at the ends of the fuse tube. The fuse tube is equipped with an advanced internal arc-extinguishing tube, paired with an outer phenolic compound paper tube or an epoxy glass tube. The load switching fuse cutout further incorporates high-performance, elastic auxiliary contacts, and an arc-extinguishing enclosure, providing efficient and reliable on-off load current switching.
In typical operations, the fuse link ensures that the fuse tube remains securely closed. When faults occur, the fault current rapidly melts the fuse, generating an electric arc that activates the arc-extinguishing tube. This heats the tube, releasing substantial gas volumes and creating high pressure to elongate the arc within the tube. Once the fuse melts, the moving contact loses tension, permitting the mechanism to lock, and the fuse tube to drop gracefully, transitioning to an open state. For cutout load switching, operators deftly employ an insulating operating bar to draw the moving contact. Initially, the main contact stays connected to the auxiliary static contact. As pulling continues, an electric arc forms between them, extending within the gap of the arc-extinguishing enclosure. Simultaneously, the arc-extinguishing mechanism expels gas to efficiently extinguish the arc as the current crosses zero, ensuring a seamless and safe operation.
Product Parameters
| Typ |
Rated Volatge (kv) |
Rated Current (A) |
Breaking current (kA) |
Impulse voltage (BIL) |
Power-frequency withstand voltage |
Leakage distance (mm) |
Weight (kg) |
| UD-1 |
12 |
100 |
6.3 |
110 |
40 |
250 |
5.8 |
| UD-1 |
12 |
200 |
8 |
110 |
40 |
250 |
5.8 |
| UD-2 |
15 |
100 |
10 |
125 |
45 |
320 |
6.9 |
| UD-2 |
15 |
200 |
12 |
125 |
45 |
320 |
6.9 |
| UD-3 |
24 |
100 |
8 |
150 |
65 |
530 |
10 |
| UD-3 |
24 |
200 |
10 |
150 |
65 |
530 |
10 |
| UD-4 |
15 |
100 |
10 |
125 |
45 |
350 |
4.15 |
| UD-4 |
15 |
200 |
12 |
125 |
45 |
350 |
4.15 |
| UD-5 |
12 |
100 |
6.3 |
110 |
40 |
250 |
6.3 |
| UD-5 |
12 |
200 |
8 |
110 |
40 |
250 |
6.3 |
| UD-6 |
15 |
100 |
10 |
125 |
45 |
320 |
10 |
| UD-6 |
15 |
200 |
12 |
125 |
45 |
320 |
10 |
| UD-7 |
24 |
100 |
8 |
150 |
65 |
540 |
10 |
| UD-7 |
24 |
200 |
10 |
150 |
65 |
540 |
10 |
| UD-7(F) |
33 |
200 |
12 |
170 |
70 |
720 |
4.4 |
| UD-8 |
33 |
100 |
10 |
170 |
70 |
720 |
11.6 |
| UD-8 |
33 |
200 |
12 |
170 |
70 |
720 |
11.6 |
Main product
Company Profile
Zhejiang ChaoTai Complete Equipment Co., Ltd. shines as an emblem of pioneering innovation and unmatched excellence in the vibrant field of electrical integration. As a dynamic high-tech enterprise, we proudly present an exceptionally skilled R&D, production, and service team. With more than 15 years of steadfast dedication and expertise, we are empowered to lead the industry with confidence and creativity.
Our diverse product portfolio includes advanced high-voltage solid-state soft starters, innovative capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and durable substations. These premium products are vital across numerous sectors, including the energy and chemical industries, metal smelting operations, expansive electrical power grids, and industrial manufacturing. We also support prestigious universities and research institutions. In addition, our innovative solutions invigorate the medical and pharmaceutical fields, bolster municipal commerce, enhance water conservation and hydropower projects, streamline road traffic systems, and elevate both commercial and residential developments.
Rooted in a steadfast commitment to technological innovation and the philosophy of 'smart manufacturing,' we are resolute in attracting top-tier technical talent to enhance our core competitive advantage comprehensively. Our unwavering dedication is to deliver unparalleled value to our clients, aspiring to create the industry's most esteemed brand. From our inception, we have made relentless progress, evolving into excellence. Our journey is driven by innovation and sustained by a modern business ethos where quality is our lifeline, market orientation is vital, reputation-driven growth is paramount, and efficiency is achieved through strategic management. We adhere steadfastly to the principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and technical talent management, diligently working to expand our market reach. Our mission is to serve China's electric power and grid transmission and distribution sectors with increasing speed, strength, and ambition. At our core, integrity is non-negotiable, quality is inviolable, service is sovereign, and customer satisfaction is our perennial creed. Our relentless pursuit of excellence, continuous innovation, and commitment to building a trustworthy brand remain our guiding principles. Your recognition propels our progress. We extend our heartfelt gratitude to all our loyal clients for their unwavering support, and Senhang Technology eagerly anticipates partnering with you to shape a brighter future together.
Our Advantages
Certifications
After Sales Service
FAQ
Q1. Are you a factory or trading company?
A.We are a factory.
Q2. Where is your factory located? How can I visit there?
A. Our factory is located in Wenzhou City, Zhejiang Province, China. You can fly to Longwan airport directly. All our clients,from home or abroad, are warmly welcome to visit us!
Q3. What's the payment term?
A. We accept TT. 30% deposit and 70% before shipment, Western Union, L/C At Sight is ok! We'll l show you the photos of the products and packages before you pay the balance.
Q4. Tell me the standard of package? What is your terms of packing?
A: Generally, we pack our goods in neutral white boxes and brown cartons, If vou have leaallyl registered patent, we can pack the goods in your branded boxes after getting your authorization letters.
Q5. Would you accept to use our logo?
A. If you have good quantity,it absolute no problem to do OEM.
Q6. How about the transport?
A. If the number of aoods is small we usually use TNT.DHL.FEDEX.EMS and some express voull offered. If the number of the goods is big usually we use the FWD you offered or we provided. Either by sea or by air is OK.
Q7. What is your Production lead time /delivery time?
A: Generally, it will take 25 to 30 days after receivina vour advance payment.
The specificl delivery time depends on the items and the quantity of your order. Silicone rubber's reqular product is 1,000/ week, Porcelain's need 2-3 weeks about 1000 pcs.
Q8. How do you make our business long-term and good relationship?
A:l. We keep aood auality and competitive price to ensure our customers benefit:
A: 2. We respect every customer as our friend and we sincerely do business and make friendsl with them, no matter where they come from.
A: 3.Most goods we have the type report according the IEC STANDARD
Q9. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the courier cost.
Q10. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.
Q11. What is your terms of delivery?
A: EXW, FOB, CFR, CIF.
Q12.What certificates do you have?
A:ISO9001,OHSAS18001,ISO14001 certificate and Type test report of product.
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