Product Description
General
Introducing the drop-out fuse and pull load drop-out fuse, the quintessential outdoor high-voltage protective devices. These are pivotal for safeguarding your electrical systems. Commonly installed on the high-voltage side of distribution transformers or as vital links in distribution lines, these fuses offer robust protection against transformer and line short circuits, overloads, and adeptly handle open-circuit load currents. They are meticulously constructed with an insulating bracket and fuse tubes; the static contact is securely affixed to both ends of the insulation bracket, while the moving contact is strategically mounted on the fuse tube ends. The innovative design of the fuse tube features an inner arc tube enveloped by a durable outer 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, providing unparalleled operational versatility when it comes to managing open or co-load currents.
In standard operation, the drop-out fuse stands firmly in a closed position, with the fuse tube and fuse held under tension. Upon encountering a system failure, the fault current swiftly melts the fuse, giving rise to an arc. This arc, in turn, heats the arc tube, which then releases copious amounts of gas, generating high pressure within the tube. This phenomenon creates a vertical wind along the pipeline, effectively stretching and elongating the arc. As the fuse blows, the moving contact loses tension and activates the locking mechanism, which releases the fuse tube, dropping it into the breaking position. To facilitate load pulling, an insulating rod is utilized to disengage the moving contact, maintaining initial contact with the static contact. Continuous pulling with the insulating rod leads to the separation of the auxiliary contacts, with an arc forming and elongating within the hood slit. The gas within the arc cover plays a crucial role in extinguishing the arc when the current diminishes to zero.
Use and Standards
This ingeniously crafted product is tailored for application in 10 ~ 35KV distribution lines, branching lines, and the primary side of distribution transformers. It offers exceptional protection against overloads and short circuits while efficiently handling the separation and combination of rated load currents.
The product model aligns with the rigorous JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is constructed in accordance with the esteemed GB15166.3-1994 high voltage fuses expulsion fuses standards. In cases where standards ambiguously define key parameters and configurations, meticulous corrections are applied in line with JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology, ensuring unparalleled compliance.
Drop-out fuse cutouts and load switching fuse cutouts are essential outdoor high voltage protective devices. Seamlessly integrating with the incoming feeder of distribution transformers or distribution lines, they provide indispensable protection against short circuits and overloads, while expertly managing on/off loading currents. The drop-out fuse cutout consists of insulate insulator supports and a fuse tube, with static contacts securely positioned on both sides of the insulator support and moving contacts adeptly installed at the fuse tube ends. The sophisticated architecture of the fuse tube includes an inner arc-extinguishing tube enveloped by a robust outer phenolic compound paper tube or epoxy glass tube. Meanwhile, the load switching fuse cutout is enhanced with reinforced elastic auxiliary contacts and an arc-extinguishing enclosure, adeptly managing on-off loading current with precision.
Under standard working conditions, the fuse link ensures the fuse tube remains securely in a closed position. When system faults arise, the fault current rapidly melts the fuse, forming an electric arc that heats the arc-extinguishing tube, releasing substantial gas to create high pressure that propels the arc along the tube. Once the fuse link melts, the moving contact loses its tension, causing the mechanism to lock, and the fuse tube to drop out, transitioning the cutout to an open position. For switching off during cutout loading, operators employ an insulating operating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but further pulling disengages the auxiliary contacts, generating an electric arc that elongates within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism releases gas to extinguish the arc as the current reaches zero, ensuring seamless operation and protection.
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. proudly leads the charge in electrical integration as an esteemed high-tech enterprise. With an illustrious team specializing in R&D, production, and service, we draw upon over 15 years of profound industry experience to constantly innovate and set new benchmarks of excellence.
Our product spectrum is truly unrivaled, featuring high-voltage solid-state soft starters, advanced capacitor cabinets, both high and low voltage switchgear, cutting-edge gas-insulated switchgear, and state-of-the-art substations. These solutions have been pivotal in transformative applications across diverse sectors. From the dynamic energy and chemical landscapes to the robust metal smelting and expansive electric power grids, our products meet the highest demands. Industrial manufacturing, esteemed universities, pioneering research institutions, and the thriving medical and pharmaceutical industries benefit from our innovative solutions. Moreover, our expertise extends to the vital municipal commerce, pivotal water conservancy, and hydropower sectors, as well as integral road traffic systems. Our comprehensive reach also serves a wide array of commercial and residential domains.
Driven by an incessant quest for technological advancement and a visionary 'smart manufacturing' ethos, we are committed to attracting top-tier technical talent. This dedication fortifies our core competitiveness, empowering us to deliver unequaled value to our clients, and propelling our ambition to become an industry leader. Since our founding, we have embarked on an extraordinary growth trajectory, evolving from modest origins to become paragons of industry excellence. Our business philosophy is anchored in innovation, embracing a modern framework that relies on quality for survival, market acuity for expansion, reputation for development, and efficiency through precise management. Our unwavering promise is to make technology our guiding star, adhere to stringent management standards, deliver exceptional quality, and ensure unparalleled customer satisfaction. This commitment bolsters our market presence and drives us to serve China's electric power and grid sectors with bold aspirations. Integrity is our bedrock, quality our hallmark, service our signature, and customer satisfaction our continuous pursuit. Our steadfast goals are the relentless pursuit of excellence, unwavering innovation, and crafting a trusted brand. Your endorsement empowers our journey, and we extend our deepest gratitude to all our esteemed customers for their unwavering support and loyalty. Together with Senhang Technology, we eagerly look forward to shaping a brighter future, hand in hand!
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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