Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse stand as paragons of outdoor high-voltage electrical protection, meticulously engineered for excellence. These devices are expertly placed on the high-voltage side of distribution transformers or act as pivotal support links within distribution lines. They are the stalwart protectors against transformer and line short circuits, adeptly managing overload situations, and facilitating current regulation for efficient opening and loading. With a design that exudes cutting-edge innovation, the drop-out fuse comprises an insulating bracket and fuse tubes, which securely hold static contacts at each end, while the elegantly designed moving contacts are seamlessly affixed to the ends of the fuse tube. The fuse tube itself is a marvel, boasting an advanced inner arc tube, paired with a robust outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse is notably versatile, featuring auxiliary contacts and an intricately crafted arc chute, ensuring smooth transitions during current loads.
During standard operations, the drop-out fuse remains firmly secured in a closed configuration, with the fuse tube under precise tension. Upon detection of system faults, the fault current promptly acts, blowing the fuse and igniting a vigorous arc. This arc enlivens the arc tube, decomposing substantial gas volumes and generating high pressure within the tube, crafting a vertical wind path that adeptly stretches and elongates the arc. As the fuse blows, the moving contact is released, rotating gracefully outward, while the locking mechanism disengages, allowing the fuse tube to drop and achieve a decisive open position. For load pulling, an insulating rod is utilized to extract the moving contact while maintaining engagement with the static contact. With sustained force, auxiliary contacts separate, creating an arc within the hood slit. The arc cover proficiently contains the gas, facilitating efficient arc extinguishment as the current nears zero.
Applications and Compliance Standards
This exceptional product is precisely crafted for use in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It provides steadfast protection against overloads and short circuits, while ensuring effective separation and recombination of the rated load current.
The precision-engineered design of this product adheres to the rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters are firmly aligned with the esteemed GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In instances where detailed definitions are absent, tailored adjustments are made in accordance with the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout epitomize high-performance outdoor high-voltage protective devices. Expertly crafted to seamlessly connect with the incoming feeder of distribution transformers or lines, they play a vital role in safeguarding transformers and lines from short circuit incidents and overload conditions, while adeptly handling the on/off load current. The drop-out fuse cutout comprises robust insulating supports and a fuse tube, with static contacts strategically fixed on both sides and moving contacts expertly affixed at the ends of the fuse tube. The sophisticated fuse tube features an advanced internal arc-extinguishing tube, complemented by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also incorporates high-performance, elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring efficient on-off load current switching.
In standard operational scenarios, the fuse link ensures the fuse tube remains securely closed. When encountering faults, the fault current promptly melts the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing substantial gas volumes and creating high pressure to elongate the arc within the tube. Once melted, the moving contact loses tension, allowing the mechanism to lock, and the fuse tube to gracefully drop out, transitioning to an open position. For cutout load switching, operators skillfully utilize an insulating operating bar to draw the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact is further pulled, an electric arc forms between them, extending within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas, efficiently extinguishing the arc as the current passes through 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
Step into the future of electrical integration with Zhejiang Chaotai Complete Equipment Co., Ltd., where innovation and excellence harmonize to redefine industry standards. As a vibrant, forward-thinking high-tech enterprise, we proudly present an exceptional R&D, production, and service team. Our experts boast over 15 years of unwavering dedication and unrivaled expertise, driving innovation at the forefront of the industry.
Discover our expansive array of premium products, including high-voltage solid-state soft starters, advanced capacitor cabinets, and versatile high and low voltage switchgear. Our cutting-edge gas-insulated switchgear and robust substations stand as indispensable solutions across diverse sectors. From the energy and chemical industries to metal smelting and expansive power grids, our offerings are esteemed by industrial manufacturers and academic institutions alike. Our solutions also energize the medical and pharmaceutical fields, bolster municipal commerce, enhance water conservation and hydropower projects, optimize road traffic systems, and elevate both commercial and residential developments with precision and reliability.
Rooted in an unwavering commitment to technological advancement and 'smart manufacturing,' we passionately attract top-tier technical talent to bolster our core competitiveness. We are committed to delivering unrivaled value and aspire to create the most revered brand in the industry. Our journey from inception to excellence is marked by relentless progress, innovation, and a modern business ethos. Quality is our lifeline, market orientation is our compass, reputation-driven growth is our ambition, and strategic management unlocks efficiency. Adhering to the principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction,' we diligently expand our market presence in quality and technical management. Our mission is to accelerate growth in China's electric power and grid transmission sectors, with integrity, quality, service, and customer satisfaction as our guiding tenets. Your recognition fuels our journey, and we express profound gratitude to our loyal clients for their enduring support. At Zhejiang Chaotai, we eagerly anticipate partnering with you to illuminate 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.
Audited Supplier 
){kind=link}