Product Description
General
The drop-out fuse and pull load drop-out fuse are crucial outdoor high-voltage protective devices, meticulously designed to safeguard your electrical systems with utmost reliability. These fuses, typically positioned on the high-voltage side of distribution transformers or as vital components in distribution lines, ensure unparalleled protection against transformer and line short circuits, overloads, and facilitate open-circuit load currents. Featuring an insulating bracket paired with fuse tubes, the static contact is securely affixed to both ends of the insulation bracket, while the moving contact is strategically mounted on the ends of the fuse tube. The fuse tube itself is masterfully crafted from an inner arc-extinguishing tube, enveloped by an outer phenolic paper tube or a robust epoxy glass cloth tube. The pull load drop-out fuse is enhanced with flexible auxiliary contacts and an arc chute, offering superior operational flexibility, particularly when managing open or co-load currents.
In normal operational conditions, the drop-out fuse dutifully remains in a closed position, with the fuse tube and fuse under precise tension. Upon encountering system failures, the fault current swiftly melts the fuse, generating a potent arc. This intense heat stimulates the arc tube to release significant volumes of gas, creating high pressure within the tube. The resulting vertical wind along the pipeline effectively stretches and elongates the arc. As the fuse blows, the moving contact loses its tension, triggering the locking mechanism to release the fuse tube, which gracefully transitions into the breaking position. For load pulling, an insulating rod is employed to skillfully disengage the moving contact, initially retaining contact with the static contact. Continued pulling using the insulating rod seamlessly separates the auxiliary contacts, where an arc forms and elongates within the hood slit. The gas within the arc cover aids in extinguishing the arc as the current reaches zero, ensuring safe and efficient operation.
Use and Standards
This product is expertly engineered for deployment in 10 ~ 35KV distribution lines, branching lines, and the primary side of distribution transformers. It delivers exceptional protection against overloads and short circuits, while efficiently managing the separation and combination of rated load currents with precision and reliability.
The product model is meticulously aligned with the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is crafted in strict accordance with the GB15166.3-1994 high voltage fuses expulsion fuses standards. In instances where standards ambiguously define crucial parameters and configurations, corrections are meticulously carried out following the JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology.
Drop-out fuse cutouts and load switching fuse cutouts serve as integral outdoor high voltage protective devices, seamlessly integrated with the incoming feeder of distribution transformers or distribution lines. They offer indispensable protection against short circuits and overloads, while adeptly managing on/off loading currents. The drop-out fuse cutout consists of insulated insulator supports and a robust fuse tube, with static contacts securely fastened on both sides of the insulator support and moving contacts strategically installed at the ends of the fuse tube. The fuse tube's design showcases an inner arc-extinguishing tube encased in an outer phenolic compound paper tube or a sturdy epoxy glass tube. The load switching fuse cutout incorporates reinforced elastic auxiliary contacts and an arc-extinguishing enclosure, proficiently managing on-off loading current with precision and efficiency.
Under typical working conditions, the fuse link ensures the fuse tube is meticulously secured in a closed position. When system faults arise, the fault current swiftly melts the fuse, producing a dynamic electric arc that heats the arc-extinguishing tube, releasing substantial gas and creating high pressure to propel the arc along the tube. Upon the melting of the fuse link, the moving contact loses its tension, triggering the mechanism to lock, allowing the fuse tube to drop out and transit the cutout to an open position. During cutout loading, operators utilize a specialized insulating operating bar to deftly pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but further pulling adeptly disengages the auxiliary contacts, generating an 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 approaches zero, ensuring optimal safety and performance.
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. epitomizes excellence and innovation in electrical integration as a leading high-tech enterprise. Our esteemed team, rich with over 15 years of industry-defining experience, excels in research, development, production, and customer service. We continuously push the boundaries of innovation to maintain our prestigious status in the industry.
Our portfolio is a testament to our commitment to excellence, featuring an exceptional array of products such as high-voltage solid-state soft starters, capacitor cabinets, advanced high and low voltage switchgear, and cutting-edge gas-insulated switchgear. We also offer sophisticated substations. Across diverse sectors, our innovative solutions make a powerful impact, from the dynamic energy and chemical industries to robust metal smelting operations, expansive electric power grids, and the forefront of industrial manufacturing. Our influence extends to esteemed universities, groundbreaking research institutions, the burgeoning medical and pharmaceutical fields, as well as municipal commerce. Our expertise is pivotal in the essential water conservancy and hydropower sectors, efficient road traffic systems, and a wide range of commercial and residential applications.
Driven by an unwavering pursuit of excellence in technological innovation and guided by a visionary 'smart manufacturing' philosophy, we are committed to attracting top-tier technical talent. This strategic focus strengthens our core competitiveness, allowing us to deliver unparalleled value to our clients and positioning our brand as a leader in the industry. From our inception, we have embarked on an extraordinary growth journey, transforming from modest beginnings to achieving industry prominence. Our ethos is deeply rooted in innovation, with a modern business model that thrives on delivering quality as the cornerstone of survival, market orientation as the catalyst for growth, reputation as the key to development, and efficiency through meticulous management. Our steadfast commitment is to leverage technology as our guiding light, adhere to standardized management practices, deliver outstanding quality, and prioritize customer satisfaction. This empowers us to reinforce our market leadership and aspire to ambitious goals within China's electric power and grid sectors. Integrity is our foundation, quality is our strength, exceptional service is our signature, and customer satisfaction is our enduring ethos. Our unwavering pursuits include the quest for excellence, continuous innovation, and building a trusted brand. Your recognition propels our journey forward, and we extend heartfelt gratitude to all our valued customers for their unwavering support and loyalty. Together with Senhang Technology, we eagerly anticipate a brighter future, united in success!
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.
Audited Supplier 
){kind=link}