Product Description
General
The drop-out fuse and pull load drop-out fuse represent essential outdoor high-voltage protective solutions, meticulously crafted to safeguard electric systems. Positioned on the high-voltage side of distribution transformers or integrated within distribution lines, these fuses deliver robust protection against transformer and line short circuits, as well as overloads. They excel in managing open-circuit load currents. Their resilient construction incorporates an insulating bracket and fuse tubes; static contacts are firmly mounted on each end of the insulation bracket, while moving contacts are strategically placed at the fuse tube extremities. Ingeniously designed, the fuse tube features an internal arc tube surrounded by an outer phenolic paper tube or epoxy glass cloth tube. Optimized for superior performance, the pull load drop-out fuse is equipped with nimble auxiliary contacts and an arc chute, enhancing its operational versatility, especially when tackling open or co-load currents.
In routine operations, the drop-out fuse remains closed, maintaining tension in the fuse tube and fuse. When a system fault occurs, the fault current melts the fuse, creating an arc. The intense heat from the arc generates a gas outflow from the arc tube, increasing the pressure inside the tube. This initiates a vertical airflow along the pipeline, adeptly stretching and elongating the arc. As the fuse blows, the moving contact loses tension, triggering the locking mechanism to release the fuse tube, guiding it into the breaking position. For load pulling, an insulating rod is utilized to disengage the moving contact, initially keeping it connected to the static contact. Continued pulling with the rod causes the auxiliary contacts to disengage, forming and extending an arc within the hood slit. The gas from the arc cover aids in extinguishing the arc when the current reaches zero.
Use and Standards
This product stands out with a brilliant design perfectly suited for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It provides exceptional protection against overloads and short circuits, efficiently managing the separation and union of rated load currents.
Complying with exemplary standards, the product model aligns with JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is meticulously crafted to meet the rigorous GB15166.3-1994 high voltage fuses expulsion fuses standards. Should standards present ambiguities in defining critical parameters and configurations, precise adjustments are made in accordance with JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology.
Drop-out fuse cutouts and load switching fuse cutouts are pivotal for outdoor high voltage protection. Seamlessly integrated into incoming feeders of distribution transformers or distribution lines, they offer crucial defense against short circuits and overloads, efficiently managing on/off loading currents. The drop-out fuse cutout features insulating insulator supports and a fuse tube; static contacts are securely positioned on either side of the insulator support, and moving contacts sit at the ends of the fuse tube. The sophisticated design of the fuse tube includes an internal arc-extinguishing tube, encapsulated by an outer phenolic compound paper or epoxy glass tube. The load switching fuse cutout features robust elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring proficient management of on-off loading currents.
Under normal operating conditions, the fuse link ensures the fuse tube remains securely closed. When faults occur, fault currents quickly melt the fuse, creating an electric arc that heats the arc-extinguishing tube, releasing large amounts of gas. This high pressure propels the arc along the tube. Once the fuse link melts, the moving contact loses tension, activating the mechanism to lock, and the fuse tube drops out, transitioning the cutout to an open state. To switch off during cutout loading, operators use an insulating bar to pull the moving contact. Initially, the main contact and auxiliary static contact stay engaged, but further pulling disengages the auxiliary contacts, generating an electric arc that lengthens within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism releases gas, ensuring the arc is extinguished 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 shining beacon of excellence and innovation in the electrical integration industry. As a prestigious high-tech enterprise, we are dedicated to pioneering advancements, supported by a distinguished team of experts in R&D, production, and service. With a rich tapestry of over 15 years of experience, we are not merely participants in the industry but trailblazers setting new benchmarks for excellence.
Our diverse product range embodies our unwavering commitment to excellence, showcasing top-tier high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, and innovative gas-insulated switchgear. We also offer state-of-the-art substations, meticulously designed to meet a plethora of industry demands. Serving the dynamic energy and chemical sectors, robust metal smelting industries, and expansive electric power grids, our solutions redefine the possibilities of efficiency and reliability. Our advanced offerings play a crucial role in industrial manufacturing, esteemed universities, pioneering research entities, and the vibrant medical and pharmaceutical sectors. In municipal commerce, water conservancy, hydropower, road traffic systems, and a wide array of commercial and residential areas, our products stand as paragons of unmatched reliability and efficiency.
At Zhejiang ChaoTai, our steadfast commitment to technological innovation and a forward-thinking 'smart manufacturing' philosophy propels us to attract top-tier technical talent. This empowers us to elevate our core competitiveness, delivering extraordinary value to our clients and cementing our status as an industry leader. From our humble beginnings, we have embarked on an extraordinary journey of growth, embracing a contemporary business model underpinned by quality, market insight, and efficiency through meticulous management. Our ethos is anchored in prioritizing technology, adhering to standardized management practices, ensuring exceptional quality, and achieving unparalleled customer satisfaction. With integrity as our foundation, quality as our hallmark, and customer satisfaction as our perpetual mission, we strive to excel, innovate, and build a brand synonymous with trust. We extend our deepest gratitude to all our esteemed customers for their unwavering support and loyalty. Together with Senhang Technology, we are ready to craft 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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