Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse stand as quintessential outdoor high-voltage electrical protection solutions. Strategically placed on the high-voltage side of distribution transformers or integrated into distribution lines, these devices are the frontline defense against transformer and line short circuits, and overload scenarios. They adeptly manage the opening and co-loading of current. Ingeniously crafted, each drop-out fuse comprises an insulating bracket and fuse tubes, with static contacts affixed at the bracket's ends and moving contacts on the fuse tube ends. The fuse tube's inner arc tube is complemented by an outer phenolic paper or epoxy glass cloth tube. The Pull Load Drop-out Fuse offers heightened adaptability with auxiliary contacts and an arc chute, meticulously engineered for seamless current load operations.
In regular operations, the drop-out fuse remains securely closed, with a tensioned fuse tube. However, when a system malfunction occurs, the fault current instantly blows the fuse, creating an arc. This arc ignites the arc tube, resulting in the decomposition of vast gas volumes that generate high pressure inside the tube and form a powerful vertical wind path. This sophisticated mechanism promptly stretches and elongates the arc. Following the fuse blowing, the moving contact releases tension and rotates outward, while the locking mechanism disengages, allowing the fuse tube to drop, achieving a breaking position. For load pulling, an insulating rod is utilized to draw the moving contact, maintaining its connection with the static contact. Continued effort causes the auxiliary contacts to separate, creating an arc between them, stretched within the hood slit. The arc cover supports arc extinguishment by containing the gas, bringing the current to zero.
Use and Standards
This distinguished product is tailored for deployment in 10 to 35KV distribution lines, including branching lines and on the primary side of distribution transformers. It provides robust protection against overloads and short circuits while ensuring efficient separation and combination of the rated load current.
The meticulous design of this product adheres to the JB/T8321-1996 Method for AC high-voltage fuse preparation, and the product parameters conform to GB15166.3-1994 high voltage fuses Expulsion fuses standards. Where standards lack detailed definitions of crucial parameters and configurations, adjustments 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 represent the pinnacle of outdoor high-voltage protective devices. Designed to connect with the incoming feeder of distribution transformers or lines, they are instrumental in protecting transformers and lines from short circuit incidents and overload conditions while managing the on/off load current. The drop-out fuse cutout features insulating insulator supports and a fuse tube, with static contacts secured on both insulator support sides and moving contacts installed at the fuse tube ends. The fuse tube incorporates an internal arc-extinguishing tube, complemented by an outer phenolic compound paper or epoxy glass tube. The load switching fuse cutout includes enforced elastic auxiliary contacts and an arc-extinguishing enclosure for efficient on-off load current switching.
Under normal operational circumstances, the fuse link ensures the fuse tube remains tensioned for a closed position. In the event of a fault, the fault current causes the fuse to melt immediately, generating an electric arc. This process heats the arc-extinguishing tube, releasing significant gas volumes, which create high pressure and elongate the arc within the tube. After melting, the moving contact loses tension, allowing the mechanism to lock and the fuse tube to drop out, transitioning to an open position. For load switching during cutout, operators utilize an insulating operating bar to manipulate the moving contact. Initially, the main contact stays engaged with the auxiliary static contact. As the auxiliary contact is further pulled, an electric arc forms between the auxiliary contacts, elongating within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to extinguish 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
Zhejiang ChaoTai Complete Equipment Co., Ltd. stands as a beacon of cutting-edge innovation and unparalleled excellence within the electrical integration industry. Renowned as a trailblazing high-tech enterprise, we proudly present a formidable team specializing in research and development, production, and service, honed by over 15 illustrious years of dedicated industry expertise.
Our diverse and comprehensive product portfolio features high-voltage solid-state soft starters, state-of-the-art capacitor cabinets, versatile high and low voltage switchgear, pioneering gas-insulated switchgear, and robust substations. These high-performance solutions are essential across a wide spectrum of industries, including energy, chemical, metal smelting, expansive electric power grids, and industrial manufacturing. Our products are also vital to the advancement of distinguished universities and research institutions. Furthermore, they empower the medical and pharmaceutical realms, support municipal commerce, enhance water conservancy and hydropower initiatives, optimize road traffic systems, and elevate both commercial and residential projects.
Our foundation is deeply rooted in a passionate commitment to technological advancement and the ethos of 'smart manufacturing.' We strive to attract exceptional technical talent, elevating our company's core competitive prowess. Our unwavering mission is to deliver unrivaled value to our clients and to establish the most revered brand in the industry. From our inception, we've persistently progressed from foundation to excellence, guided by an unwavering commitment to innovation and a forward-thinking business ethos. We emphasize quality as our lifeline, market orientation, reputation-driven growth, and management-driven efficiency. We remain resolute in our commitment to 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' as our guiding principles in quality and talent management, diligently enhancing our market presence. Our mission is to substantially advance China's electric power and grid transmission and distribution sectors with speed, strength, and ambitious growth. At our core, integrity is paramount, quality is inviolable, service is paramount, and customer satisfaction is our eternal mission. Our relentless pursuit of excellence, constant innovation, and commitment to building a trustworthy brand are our guiding principles. Your recognition propels our journey forward. We express our deepest gratitude to all our devoted clients for their steadfast support, and Zhejiang Chaotai eagerly anticipates partnering with you to create 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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