Product Description
General
Introducing the drop-out fuse and pull-load drop-out fuse, an essential outdoor high-voltage protection device. Designed for installation on the high-voltage side of distribution transformers or as a support link for distribution lines, this robust equipment offers superior short circuit and overload protection. Its construction features an insulating bracket, static contacts at both ends, and a dynamic moving contact on the fuse tube, which comprises an inner arc tube and an outer tube made of phenolic paper or epoxy glass cloth. The pull-load drop-out fuse is enhanced with flexible auxiliary contacts and an innovative arc chute for seamless operation under load current.
In standard operation, the drop-out fuse remains securely closed by the fuse tension. Upon system failure, the fault current instantly blows the fuse, generating an arc. This initiates a reaction in the arc tube, decomposing gases and building high pressure to stretch the arc along the pipeline, ensuring rapid extinguishment. Once the fuse is blown, tension releases, activating the locking mechanism and allowing the fuse tube to drop, transitioning to a breaking position. For load operations, an insulating rod is used to manipulate the moving contact. Initially, there's contact between moving and static components, but with further pulling, the auxiliary contacts disengage, forming an arc that stretches and extinguishes as the current reaches zero.
Use and Standards
This cutting-edge product is perfect for 10 to 35KV distribution line branches and primary sides of distribution transformers, offering unmatched overload and short circuit protection while smoothly managing rated load currents.
Designed in accordance with the JB/T8321-1996 method for AC high-voltage fuses, this product adheres to the GB15166.3-1994 expulsion fuses standards. Although these standards do not define all critical parameters and configurations, adjustments are made per the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses.
The drop-out fuse cutout and load switching fuse cutout are indispensable high-voltage protective devices for outdoor use. Connecting with incoming feeders of distribution transformers or lines, they offer premier protection against short circuits and overloads, as well as efficient on/off loading. Constructed from durable insulator supports and fuse tubes, they feature static contacts securely fixed at each end, with dynamic moving contacts at the tube's extremities. These fuse tubes are crafted from an inner arc-extinguishing tube and an outer phenolic or epoxy glass tube, with load-switching models featuring reinforced auxiliary contacts and an arc-extinguishing enclosure for optimal performance.
In typical operation, the fuse link maintains the fuse tube in a closed position. When system faults occur, the resulting fault current swiftly melts the fuse, causing an electric arc that heats the arc-extinguishing tube, releasing a flood of gas and producing high pressure that propels the arc along the tube. Once the fuse melts, the moving contact loses tension, the mechanism locks, and the fuse tube disengages, leaving the cutout in an open position. To switch off under load, operators use an insulating rod to pull the moving contact. Initially, main and auxiliary contacts remain engaged, but as the auxiliary contact separates, an arc forms and extends within the arc-extinguishing enclosure. This process effectively extinguishes the arc as the current drops to 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
Introducing Zhejiang Chaotai Complete Equipment Co., Ltd., a pioneering high-tech enterprise at the forefront of electrical integration. Boasting an exceptional team in R&D, production, and service, we leverage over 15 years of rich industry experience to deliver unparalleled solutions.
Our diverse product portfolio encompasses high-voltage solid-state soft starters, innovative capacitor cabinets, versatile high and low voltage switchgear, and cutting-edge gas-insulated switchgear and substations. Our solutions are indispensable across various sectors, including the energy and chemical industries, metal smelting, electric power grids, industrial manufacturing, and more. Whether in universities and research institutions, the medical and pharmaceutical sectors, municipal commerce, water conservancy and hydropower, road traffic, or commercial and residential zones, our products deliver exceptional reliability and performance.
Driven by a passion for technological innovation and a commitment to 'smart manufacturing,' we strategically attract top-tier technical talents to fortify our core competitiveness. This approach not only elevates our market positioning but also ensures we deliver invaluable services and build an industry-leading brand. From our inception, Zhejiang Chaotai has transformed vision into reality, achieving excellence through relentless progress. We embrace a modern business philosophy, thriving on quality, reputation, and management efficiency to drive market success. Our commitment to 'technology as the guide, standardized management, excellent quality, and customer satisfaction' shapes our quality and technical management strategies, enhancing our competitive edge. We aspire to lead in China's electric power and grid sectors with unparalleled speed, strength, and ambition. Upholding integrity, prioritizing quality, and delivering exceptional service are our guiding principles. Customer satisfaction fuels our pursuit of excellence, continuous innovation, and trustworthy brand development. Your support is our inspiration, and we extend heartfelt gratitude to all our customers. Together, with Senhang Technology, we eagerly anticipate co-creating a brighter, more prosperous future.
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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