Product Description
General
The drop-out fuse and the pull load drop-out fuse are indispensable outdoor high-voltage protective devices, crucial for safeguarding the integrity of electrical systems. These fuses are strategically installed on the high-voltage side of distribution transformers or as pivotal links within distribution lines. Their primary function is to provide robust protection against transformer and line short circuits and overloads, while efficiently managing open-circuit load currents. Each fuse is meticulously crafted with an insulating bracket and fuse tubes. The static contact is securely positioned at both ends of the insulation bracket, while the moving contact is precisely mounted on the ends of the fuse tube. The construction of the fuse tube features an inner arc-resistant tube, gracefully encased by an outer phenolic paper tube or an epoxy glass cloth tube, ensuring maximum durability and performance. Furthermore, the pull load drop-out fuse is enhanced with flexible auxiliary contacts and an arc chute, optimizing operational flexibility for opening or co-load currents.
In normal operational conditions, the drop-out fuse maintains a closed position, with the fuse tube and fuse under precise tension. However, when a system failure occurs, the fault current swiftly melts the fuse, producing a formidable arc. The intense heat of the arc activates the arc tube, releasing substantial volumes of gas, thereby generating high pressure within the tube. This creates a vertical wind along the pipeline, expertly stretching and elongating the arc. Once the fuse blows, the moving contact loses tension, triggering a meticulously designed locking mechanism that releases the fuse tube, causing it to drop into the breaking position. To facilitate load pulling, an insulating rod is utilized to skillfully disengage the moving contact, which initially maintains contact with the static contact. Continued pulling with the insulating rod results in the separation of the auxiliary contacts. Consequently, an arc forms and elongates within the hood slit, while the gas within the arc cover efficiently extinguishes the arc when the current reaches zero.
Use and Standards
This state-of-the-art product is brilliantly engineered for seamless application in 10 ~ 35KV distribution lines, branching lines, and the primary side of distribution transformers. It offers exemplary protection against overloads and short circuits, while adeptly managing the separation and combination of rated load currents, ensuring unparalleled reliability and performance.
Adhering to the highest standards of quality and engineering excellence, the product model complies with the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It also meets the rigorous GB15166.3-1994 high voltage fuses expulsion fuses standards. In instances where standards ambiguously define key parameters and configurations, precise corrections are made in alignment with JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology, ensuring precision and reliability.
Drop-out fuse cutouts and load switching fuse cutouts are essential outdoor high voltage protective devices that provide unmatched protection and seamless integration with the incoming feeder of distribution transformers or distribution lines. They deliver indispensable protection against short circuits and overloads, while adeptly managing on/off loading currents. The drop-out fuse cutout is composed of durable insulator supports and a robust fuse tube, with static contacts firmly secured on both sides of the insulator support and moving contacts skillfully installed at the ends of the fuse tube. The sophisticated architecture of the fuse tube features an inner arc-extinguishing tube, elegantly encased by an outer phenolic compound paper tube or epoxy glass tube, ensuring optimal performance and longevity. Additionally, the load switching fuse cutout is equipped with reinforced elastic auxiliary contacts and a state-of-the-art arc-extinguishing enclosure to efficiently manage on-off loading current.
Under standard operating conditions, the fuse link ensures that the fuse tube is securely locked in a closed position. When system faults arise, the fault current rapidly melts the fuse, creating an electric arc that heats the arc-extinguishing tube and releases substantial gas, generating high pressure that drives the arc along the tube. As the fuse link melts, the moving contact loses its tension, activating the locking mechanism and causing the fuse tube to drop out, transitioning the cutout to an open position. To effectively switch off during cutout loading, operators utilize an insulating operating bar to disengage the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but further pulling results in the disengagement of the auxiliary contacts, generating a dynamic electric arc that elongates within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism releases gas to efficiently extinguish the arc as the current passes zero, ensuring safe and reliable operation.
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. is esteemed as a leading beacon in the realm of electrical integration, standing tall as a prestigious high-tech enterprise. With a distinguished team dedicated to research and development, production, and exemplary service, we harness over 15 years of rich experience to innovate and achieve excellence in the industry.
Our product portfolio is truly exceptional, featuring a wide range of high-performance solutions including high-voltage solid-state soft starters, sophisticated capacitor cabinets, both high and low voltage switchgear, advanced gas-insulated switchgear, as well as state-of-the-art substations. These solutions have garnered significant application across a plethora of sectors, including the dynamic energy and chemical industries, robust metal smelting operations, expansive electric power grids, and the forefront of industrial manufacturing. Our influence extends to esteemed universities, pioneering research institutions, the vibrant medical and pharmaceutical sectors, and municipal commerce. Additionally, our expertise is a beacon for the crucial water conservancy and hydropower sectors, road traffic systems, and a myriad of commercial and residential areas.
Driven by an unwavering pursuit of technological advancement and a visionary 'smart manufacturing' philosophy, we are committed to attracting top-tier technical talent. This dedication enhances our core competitiveness, allowing us to deliver unmatched value to our clients while striving to position our brand as an industry leader. Since our inception, we have charted an extraordinary path of growth, transforming from humble beginnings to achieving industry superiority. Our ethos is deeply rooted in innovation, with a contemporary business model that thrives on quality for survival, market focus for expansion, reputation for development, and heightened efficiency through meticulous management. Our resolute promise is to prioritize technology as our guiding star, adhere to standardized management, provide exceptional quality, and ensure customer satisfaction. These principles bolster our market presence and propel us towards ambitious goals within China's electric power and grid sectors. Integrity is our foundation, quality is our strength, service is our hallmark, and customer satisfaction is our enduring ethos. Our unwavering objectives are the pursuit of excellence, continuous innovation, and the crafting of a brand that commands trust. Your recognition propels our journey forward, and we extend our heartfelt gratitude to all our esteemed customers for their unwavering support and loyalty. Together with Senhang Technology, we eagerly anticipate building 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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