Product Description
General
The drop-out fuse and pull load drop-out fuse are indispensable outdoor high-voltage protection devices, meticulously engineered to serve as the ultimate guardians of electrical systems. Strategically installed on the high-voltage side of distribution transformers or within distribution lines, these powerful fuses provide a formidable shield against transformer and line short circuits and overloads, while expertly managing open-circuit load currents. Their robust and durable construction includes an insulating bracket and fuse tubes; static contacts are securely mounted at each end of the insulation bracket, and moving contacts are strategically positioned at the extremities of the fuse tube. Ingeniously designed, the fuse tube features an inner arc tube surrounded by an outer layer of phenolic paper or epoxy glass cloth tube. Crafted for operational excellence, the pull load drop-out fuse is equipped with agile auxiliary contacts and an arc chute, significantly enhancing its operational flexibility, particularly in managing open or co-load currents.
In typical operations, the drop-out fuse ensures a closed position, maintaining the fuse tube and fuse in a taut state. When a system fault occurs, the fault current melts the fuse rapidly, creating an intense arc. The arc's heat generates an outflow of gas from the arc tube, escalating the pressure inside the tube. This process initiates a vertical airflow along the pipeline, skillfully stretching and lengthening the arc. As the fuse blows, the tension of the moving contact is released, triggering the locking mechanism, which subsequently releases the fuse tube, guiding it into the breaking position. For load pulling, an insulating rod is employed to disengage the moving contact, initially maintaining its connection with the static contact. Continued pulling with the insulating rod causes the auxiliary contacts to detach, forming an arc within the hood slit. The arc cover's gas aids in extinguishing the arc as the current reaches zero, ensuring seamless and safe operations.
Use and Standards
This product stands out with its ingeniously tailored design, specifically crafted for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It serves as a stalwart protector against overloads and short circuits, while effortlessly managing the separation and union of rated load currents with unparalleled efficiency.
Adhering to exemplary standards, this product model aligns with the JB/T8321-1996 Method for type AC high-voltage fuses preparation, ensuring top-tier quality and reliability. It is meticulously crafted to meet the stringent GB15166.3-1994 high voltage fuses expulsion fuses standards. In instances where standards leave room for ambiguity in defining crucial parameters and configurations, precise adjustments are executed following the JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology, guaranteeing superior performance and compliance.
Drop-out fuse cutouts and load switching fuse cutouts are quintessential for outdoor high voltage protection. Seamlessly integrated into the incoming feeder of distribution transformers or distribution lines, they provide essential defense against short circuits and overloads, efficiently managing on/off loading currents. The drop-out fuse cutout showcases insulative insulator supports and a fuse tube; static contacts are firmly placed on either side of the insulator support, with moving contacts resting at the ends of the fuse tube. The intricate design of the fuse tube includes an inner arc-extinguishing tube, meticulously encapsulated by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is fortified with robust elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring proficient management of on-off loading currents with unparalleled precision.
Under standard operating conditions, the fuse link ensures that the fuse tube remains securely closed. When faults occur, the fault currents swiftly melt the fuse, creating an electric arc that heats the arc-extinguishing tube, releasing a significant amount of gas. This high pressure propels the arc along the tube efficiently. Once the fuse link melts, the tension on the moving contact is released, triggering the mechanism to lock, and the fuse tube drops out, transitioning the cutout to an open state. For switching off during cutout loading, operators utilize 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 elongates within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism releases gas, ensuring the arc's extinction as the current reaches zero, facilitating seamless switching operations.
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 innovation and excellence in the realm of electrical integration. As a prestigious high-tech enterprise, our commitment to pioneering innovation is unparalleled. Backed by an exceptional team that excels in cutting-edge R&D, precision-driven production, and customer-centric service, we have become a force to reckon with in the industry. With over 15 years of rich and transformative experience, we are not only revolutionizing the industry but setting new benchmarks of excellence and innovation.
Our outstanding product portfolio is a powerful testament to our unwavering commitment to excellence. It features only the finest high-voltage solid-state soft starters, and sophisticated capacitor cabinets, along with versatile high and low voltage switchgear. Our cutting-edge gas-insulated switchgear and state-of-the-art substations are meticulously tailored to meet a diverse array of industry needs. Our solutions are redefining capabilities across dynamic energy and chemical sectors, robust metal smelting operations, and expansive electric power grids. Furthermore, our advanced offerings play an integral role in the realms of industrial manufacturing, esteemed universities, pioneering research entities, and thriving medical and pharmaceutical sectors. In the municipal commerce sector, water conservancy and hydropower, road traffic systems, as well as a myriad of commercial and residential areas, our products deliver unparalleled reliability and efficiency that set us apart.
At Zhejiang ChaoTai, our unwavering dedication to technological innovation and our forward-thinking 'smart manufacturing' philosophy fuels our drive to attract top-tier technical talent. This strategic approach empowers us to enhance our core competitiveness and deliver unparalleled value to our clients, solidifying our esteemed position as an industry leader. From our humble beginnings, we've embarked on an extraordinary journey of growth, embracing a modern business model that is built on quality, market foresight, and efficiency through diligent management. Our ethos is firmly grounded in the prioritization of technology, adherence to standardized management practices, delivering exceptional quality, and ensuring customer satisfaction. With integrity as our foundation and quality as our strength, customer satisfaction remains our continuous mission. Our aim is to excel, innovate, and build a brand that commands trust and loyalty. We extend our heartfelt gratitude to all our esteemed customers for their unwavering support and loyalty as, together with Senhang Technology, we are poised to craft a brighter and more successful 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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