Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are unparalleled solutions for outdoor high-voltage electrical protection. These cutting-edge devices are meticulously positioned either on the high-voltage side of distribution transformers or as vital links in distribution lines. They act as indispensable guardians against transformer and line short circuits and overload conditions, while also enabling seamless current operations. Ingeniously designed, the drop-out fuse combines an insulating bracket with fuse tubes, featuring static contacts firmly affixed at both bracket ends and moving contacts at the fuse tube's tips. The tube's innovative construction includes an inner arc tube complemented by an outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse offers increased flexibility through specially designed auxiliary contacts and an arc chute, ensuring effortless current load management.
During routine operation, the drop-out fuse maintains its closed position with the fuse tube tensioned securely. Should a system issue arise, the fault current swiftly blows the fuse, initiating arc generation. This arc triggers the arc tube, resulting in the production of large gas volumes that create high pressure within the tube, forming a vertical wind path. This extraordinary mechanism rapidly stretches and elongates the arc. Once the fuse has blown, the moving contact releases tension and swings outward, with the locking mechanism disengaging, allowing the fuse tube to drop to a breaking position. For load pulling, an insulating rod is used to maneuver the moving contact, ensuring contact with the static contact is maintained. Through continuous effort, auxiliary contacts separate, generating an arc stretched within the hood slit. The arc cover, rich in gas, assists in extinguishing the arc precisely as the current reaches zero.
Use and Standards
This exclusive product is meticulously crafted for application in 10 to 35KV distribution lines, encompassing both branching lines and the primary side of distribution transformers. It provides robust defense against overloads and short circuits while ensuring the effective separation and integration of the rated load current.
The sophisticated design of this product is in strict compliance with the JB/T8321-1996 Method for AC high-voltage fuse preparation. Additionally, product parameters align with GB15166.3-1994 high voltage fuses Expulsion fuses standards. In instances where standards lack detail on key parameters and configurations, adaptations are made following 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 stand as premier solutions for outdoor high-voltage protection. Expertly designed to connect with the incoming feeder of distribution transformers or lines, they play a pivotal role in shielding transformers and lines from short circuits and overload conditions while adeptly managing on/off load current. The drop-out fuse cutout comprises insulating insulator supports and a fuse tube, with static contacts securely fixed on both sides and moving contacts installed at the fuse tube's ends. The tube boasts an internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout further includes robust elastic auxiliary contacts and an arc-extinguishing enclosure for efficient load current switching.
In standard operational conditions, the fuse link ensures the fuse tube stays tightly closed. When faults occur, the fault current immediately melts the fuse, creating an electric arc that heats the arc-extinguishing tube, releasing a substantial gas volume, generating high pressure, and elongating the arc through the tube. Following the fuse link's melting, the moving contact loses tension, enabling the mechanism to lock and the fuse tube to drop out, transitioning to an open position. For cutout load switching, operators utilize an insulating operating bar to draw the moving contact. Initially, the main contact stays engaged with the auxiliary static contact. As the auxiliary contact is further drawn, an electric arc forms between the auxiliary contacts, extending within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism expels gas, efficiently extinguishing the arc as 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 as a beacon of cutting-edge innovation and unparalleled excellence in the field of electrical integration. As a vibrant and forward-thinking high-tech enterprise, we are proud to have a highly experienced R&D, production, and service team, enriched by over 15 years of unwavering dedication to the electrical industry. Our team's expertise represents the pinnacle of industry knowledge.
Our diverse and comprehensive product portfolio encompasses high-voltage solid-state soft starters, state-of-the-art capacitor cabinets, advanced high and low voltage switchgear, innovative gas-insulated switchgear, and resilient substations. These high-performance solutions are crucial to a wide array of industries, including the dynamic energy and chemical sectors, the intricate world of metal smelting, expansive electric power grids, and the innovative landscape of industrial manufacturing. Furthermore, our products support esteemed universities and research institutions, energize the medical and pharmaceutical industries, facilitate municipal commerce, enhance water conservancy and hydropower endeavors, streamline road traffic systems, and elevate both commercial and residential development projects.
Anchored by an unwavering commitment to technological innovation and guided by the philosophy of 'smart manufacturing,' we strive to attract top-notch technical talent to elevate our company's core competitive strengths. Our dedication to delivering unmatched value to our clients is steadfast, and we are driven by the aspiration to establish the most prestigious brand in the industry. From our very inception, we have pursued excellence with relentless determination, navigating a journey marked by continuous innovation. Our path is shaped by a modern business ethos, emphasizing quality as our cornerstone, market orientation, reputation-driven growth, and efficiency through effective management. We firmly adhere to the principles of 'technology as our guide, standardized management, superior quality, and customer satisfaction' as the tenets of our quality and talent management strategy. Our mission is to serve China's electric power and grid transmission and distribution sectors with increasing vigor and ambition. At our core, integrity is essential, quality is revered, service is paramount, and customer satisfaction is our perpetual pledge. Our relentless pursuit of excellence, innovative spirit, and commitment to building a brand synonymous with trust are the cornerstones of our philosophy. Your recognition fuels our journey forward. We extend heartfelt gratitude to our loyal clients for their enduring support. Senhang Technology looks forward with great anticipation to collaborating with you to create a brighter and more prosperous 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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