Product Description
General
The drop-out fuse and pull load drop-out fuse represent essential outdoor high-voltage electrical protection. Positioned on the high-voltage side of distribution transformers or integrated into the distribution line as a Support Link, it ensures robust protection against short circuits, overloads, and seamlessly manages open and co-load currents. Meticulously crafted from reliable insulating brackets and fuse tubes, the structure features static contacts on both ends of the insulation bracket and moving contacts on the fuse tube ends. The fuse tube, an ingenious blend of an inner arc tube and an outer phenolic paper or epoxy glass cloth tube, forms the heart of the system. The pull load drop-out fuse is further enhanced with flexible auxiliary contacts and an arc chute, optimizing the management of open and co-load currents with superior efficiency.
In standard operation, the drop-out fuse remains in a secure closed position, maintained by the fuse tube's tension. Upon a system fault, the fault current instantly severs the fuse, generating an arc that ignites the arc tube. This activity releases significant gas volumes, developing high pressure inside the tube and creating a vertical airflow along the pipeline, swiftly elongating and quenching the arc. Once the fuse is blown, the loss of tension in the moving contact initiates a mechanism that releases and drops the fuse tube, achieving a definitive breaking position. During load disconnection, the insulating rod aids in pulling the moving contact. Despite initial contact between the moving and static contacts, further manipulation separates the auxiliary contacts, forming an arc between them. This arc is expertly managed within the hood slit, which, through gas generation, extinguishes the arc as the current reaches zero.
Use and Standards
This highly specialized product finds its application across 10 ~ 35KV distribution line branching lines and the primary side of distribution transformers. It is engineered to adeptly handle overload and short circuit protection while facilitating seamless Separation and Combination of the rated load current.
The product model adheres to JB/T8321-1996 Method for AC high-voltage fuses, with parameters crafted as per GB15166.3-1994 high voltage fuses Expulsion fuses standards. While these standards provide a foundation, some key parameters and configurations require refinement in accordance with JB/DQ2139-1986 regulations for 10 ~ 35KV outdoor high voltage drop fuses, ensuring cutting-edge performance and reliability.
Designed for outdoor use, the drop-out fuse cutout and load switching fuse cutout serve as crucial high voltage protective devices. They seamlessly connect with the incoming feeder of distribution transformers or lines, offering invaluable protection against short circuits and overloads. Engineered for superior on/off loading current management, these cutouts comprise insulate insulator supports, fuse tubes, and static contacts on each side of the insulator support. The moving contact is affixed to the fuse tube ends, featuring an inside arc-extinguishing tube supported by an outer phenolic compound paper or epoxy glass tube. The load switching fuse cutout is further equipped with enforced elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring efficient on-off loading current functionality.
Under normal conditions, the fuse link fortifies the fuse tube in a firm closed position. In the event of a system fault, the fault current promptly melts the fuse, generating an arc that activates the arc-extinguishing tube, releasing significant gas to create high pressure along the tube. Upon the fuse link melting, the moving contact loses its tensile strength, triggering a mechanism that drops the fuse tube, transitioning the cutout to an open position. For switching off during load cutout, an operator must utilize an insulating operating bar to maneuver the moving contact. Initially, the main and auxiliary static contacts remain in contact. Continued pulling separates the auxiliary contacts, generating an electric arc that lengthens within the arc-extinguishing enclosure gap. Simultaneously, the enclosure releases gas, extinguishing the arc as the current passes through 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
Welcome to Zhejiang ChaoTai Complete Equipment Co., Ltd., a pioneering high-tech enterprise at the forefront of electrical integration. With a rich legacy of over 15 years in the industry, we boast a team of skilled professionals dedicated to research and development, production, and top-tier service, all focused on delivering superior solutions to our clients.
Our impressive portfolio of products includes cutting-edge high-voltage solid-state soft starters, efficient capacitor cabinets, versatile high and low voltage switchgear, advanced gas-insulated switchgear, and robust substations. These products have found widespread application across critical sectors such as energy, chemical industries, metal smelting, and electric power grids. We proudly serve industrial manufacturing, esteemed universities, research institutions, as well as the medical and pharmaceutical sectors. Furthermore, our reach extends into municipal commerce, water conservancy, hydropower, road traffic solutions, and both commercial and residential domains, ensuring our technologies power a diverse range of industries.
At Zhejiang ChaoTai, we embody a culture of relentless technological innovation and embrace the philosophy of 'smart manufacturing.' By attracting top-tier technical talent, we continuously elevate our core competencies to provide unparalleled value to our customers. Our journey from inception to excellence is marked by steadfast progress and an unwavering commitment to quality. We follow a strategic business approach, prioritizing quality for survival, reputation for growth, and management for efficiency. Our guiding principles— 'technology as the guide, standardized management, excellent quality, and customer satisfaction'—drive us to increase market competitiveness and deliver exceptional service in China's electric power and grid sectors. Integrity is our foundation, quality is our promise, and customer satisfaction is our commitment. We relentlessly pursue excellence, fostering innovation and crafting a brand that earns trust and recognition. Your support fuels our ambition to advance, and we express heartfelt thanks to our loyal customers. Together with Senhang Technology, we eagerly anticipate a future built on partnerships that promise prosperity and 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.
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