Product Description
General
The drop-out fuse and pull-load drop-out fuse are vital outdoor high-voltage protection devices for electrical systems. Strategically installed on the high-voltage side of distribution transformers or as key components in distribution lines, they serve to safeguard transformers and lines by providing short circuit and overload protection, as well as facilitating the opening and closing of co-load currents. These fuses are ingeniously crafted with an insulating bracket and fuse tubes. The static contacts are securely positioned at both ends of the insulation bracket, while the moving contacts are adeptly installed on each end of the fuse tube. The fuse tube itself is an engineering marvel, comprising an inner arc tube and an outer shell made from either a phenolic paper tube or an epoxy glass cloth tube. The pull-load drop-out fuse is further enhanced with flexible auxiliary contacts and an arc chute, allowing it to operate seamlessly in managing open and co-load currents.
In normal operation, the drop-out fuse maintains a secure closed position thanks to the tension in the fuse tube. However, in the event of a system fault, the fault current rapidly blows the fuse, triggering the formation of an arc. This arc ignites the arc tube, resulting in the decomposition of vast amounts of gas that create a high-pressure environment within the tube. This pressure generates a powerful vertical wind along the pipeline, swiftly stretching and elongating the arc. Once the fuse blows, the moving contact loses its tension, and the mechanism releases the fuse tube, which drops, forming a breaking position. For load-switching, an insulating rod is used to pull the moving contact. Initially, the moving and static contacts maintain contact. As the insulating rod continues to pull, the auxiliary contacts separate, creating an arc that stretches within the hood slit. This arc is extinguished when the current reaches zero, thanks to the gas within the arc cover.
Use and Standards
This exceptional product is specifically designed for use in 10 to 35KV distribution line branching lines and on the primary side of distribution transformers. It is engineered to provide robust overload and short circuit protection while adeptly managing the separation and combination of the rated load current.
The product models have been meticulously developed following the JB/T8321-1996 Method for type AC high-voltage fuses. Parameters are meticulously crafted according to the GB15166.3-1994 standards for high voltage expulsion fuses. To ensure precision, any ambiguities in the standards are clarified using the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses.
Drop-out fuse cutouts and load-switching fuse cutouts are pivotal outdoor high-voltage protective devices. They are seamlessly integrated with the incoming feeder of distribution transformers or distribution lines, offering essential protection against short circuits and overload, while managing the on/off loading currents. The drop-out fuse cutout is ingeniously constructed with insulated insulator supports and a fuse tube. Static contacts are securely fixed on both sides of the insulator support, while moving contacts are installed at both ends of the fuse tube. The fuse tube features an inner arc-extinguishing tube and an outer layer made from phenolic compound paper or epoxy glass tube. The load-switching fuse cutout is enhanced with enforced elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring efficient management of switching on-off loading currents.
In normal operation, the fuse link tightly secures the fuse tube in a closed position. Should the system encounter a fault, the fault current swiftly melts the fuse link, triggering an electric arc. This arc heats the arc-extinguishing tube, causing it to release a significant amount of gas. This results in high pressure that blows below the arc along the tube. Once the fuse link melts, the moving contact loses its tension, locking the mechanism and causing the fuse tube to drop out, transitioning to an open position. During load cutout switching, operators use an insulating operating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged. As the auxiliary contact is further pulled, it separates, resulting in an electric arc between the auxiliary contacts. This arc elongates within the arc-extinguishing enclosure gap, where the arc-extinguishing gas blows it off when the current reaches zero.
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. stands at the forefront of electrical integration as a distinguished high-tech enterprise. With a seasoned professional team dedicated to research, development, production, and exceptional service, we boast over 15 years of invaluable industry expertise.
Our extensive product repertoire encompasses high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, advanced gas-insulated switchgear, and robust substations. These cutting-edge solutions are extensively utilized across a diverse array of sectors, including the dynamic energy and chemical industries, the robust metal smelting sector, expansive electric power grids, and sophisticated industrial manufacturing. We also cater to the pioneering universities and research institutions, the innovative medical and pharmaceutical sectors, as well as municipal commerce. Our products serve the intricate water conservancy and hydropower systems, enhance road traffic infrastructure, and meet the demands of commercial and residential areas, ensuring top-notch performance and reliability.
Driven by a steadfast commitment to technological innovation, we embrace the philosophy of 'smart manufacturing', actively recruiting top-tier technical talent to significantly fortify our core competencies. Our mission is to deliver the utmost value to our clientele, aspiring to establish the premier brand in the industry. Since our inception, we have relentlessly progressed, transforming from a fledgling venture to a benchmark of excellence. Our ethos of innovation is underscored by a contemporary business model that prioritizes quality for survival, market sensitivity for growth, reputation for development, and management efficiency for productivity. Our dedication to guiding technology, standardized management, superior quality, and unwavering customer satisfaction is the bedrock of our quality assurance and talent management strategies. This enhances our competitive edge in the marketplace, empowering us to serve China's electric power and grid sectors with unparalleled speed, strength, and ambition. At Zhejiang ChaoTai, integrity forms our foundation, quality is our creed, service is our hallmark, and customer satisfaction is our perpetual pursuit. Our unwavering objectives are to pursue excellence, foster continuous innovation, and cultivate a brand synonymous with trust. Your recognition fuels our endeavors. We extend heartfelt gratitude to our loyal clientele for their enduring support and partnership. Senhang Technology eagerly anticipates a collaborative future with you, as together, we forge a path to a brighter tomorrow.
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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