Product Description
General
The drop-out fuse and its load-bearing counterpart are indispensable outdoor high-voltage electrical protections. Expertly installed on the high-voltage side of distribution transformers or as a pivotal component in distribution line supports, these fuses provide unmatched short circuit and overload protection while managing open and co-load current. This robust system features an insulating bracket paired with fuse tubes. Static contacts are strategically placed at both ends of the bracket, while moving contacts are positioned at the fuse tube's extremities. The tube itself boasts an inner arc tube and is encapsulated by an outer layer of phenolic paper tube or epoxy glass cloth, ensuring durability and reliability. The pull-load drop-out fuse, enhanced with flexible auxiliary contacts and an arc chute, guarantees superior performance in managing open and co-load currents.
In typical operation, the fuse tube, under tension from the fuse, remains securely in a closed position. However, in the event of a system failure, the fault current swiftly melts the fuse. This action rapidly generates an arc, which ignites the arc tube, resulting in the decomposition of gases and creating high pressure within the tube. This process swiftly elongates the arc along the pipeline. Upon fuse failure, the moving contact loses its tension, triggering the locking mechanism to release the fuse tube, which then drops, establishing a breaking position. When it becomes necessary to pull the load, an insulating rod is employed to manipulate the moving contact. Initially, the moving and static contacts remain engaged. Continued pulling with the insulating rod separates the auxiliary contacts, generating an arc between them. This arc stretches within the hood slit, where the arc cover contains gases that extinguish the arc when the current reaches zero.
Use and Standards
This innovative product finds its purpose in 10 ~ 35KV distribution line branches and at the primary side of distribution transformers. It is expertly designed for overload and short circuit protection, ensuring seamless separation and combination of the rated load current.
The product model is meticulously crafted according to JB/T8321-1996 standards for AC high-voltage fuses. Its parameters align with the GB15166.3-1994 high voltage expulsion fuses standards. Although some parameters and configurations lack clear definitions, they are adjusted according to JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses, ensuring the highest level of precision.
Drop-out fuse cutouts and their load-switching counterparts stand as vital outdoor high voltage protective devices. Seamlessly connected with the incoming feeder of distribution transformers or distribution lines, they serve as guardians against short circuits and overloads, efficiently managing on/off loading currents. These cutouts comprise insulator supports and fuse tubes, with static contacts affixed to the insulator's sides and moving contacts installed at the ends of the fuse tube. The fuse tube itself features an inner arc-extinguishing tube, while outer layers are constructed of phenolic compound paper or epoxy glass. The inclusion of load-switching fuse cutouts with enforced elastic auxiliary contacts and arc-extinguishing enclosures ensures optimal performance in switching on-off loading currents.
During normal operation, the fuse link secures the fuse tube, maintaining a closed position. In the event of a fault in the system, the fault current instantaneously melts the fuse link, generating an electric arc. This heats the arc-extinguishing tube, causing it to release a substantial amount of gas. This action creates high pressure and propels the arc along the tube. Once the fuse link melts, the moving contact loses its tension, the mechanism locks, and the fuse tube drops out, transitioning the cutout to an open position. To switch off during cutout loading, an operator uses an insulating operating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged. As the auxiliary contact is further pulled, it separates, producing an electric arc between the auxiliary contacts. This arc extends within the arc-extinguishing enclosure gap, where it is extinguished by the gas explosion as the current transitions 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
Zhejiang ChaoTai Complete Equipment Co., Ltd. emerges as a beacon of innovation and expertise in the realm of electrical integration. As a prestigious high-tech enterprise, we boast a dedicated R&D, production, and service team enriched with over 15 years of profound industry experience.
Our distinguished product line includes cutting-edge high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and robust substations. Currently, our solutions are pivotal in powering diverse sectors such as energy, chemical industries, metal smelting, power grids, industrial manufacturing, prestigious universities, leading research institutions, as well as the medical, pharmaceutical, municipal commerce, water conservancy, hydropower, road traffic, and thriving commercial and residential areas.
Rooted in a philosophy of relentless innovation and 'smart manufacturing,' we eagerly attract top-tier technical talent to propel our core competitiveness to new heights. Our mission is to furnish esteemed clients with unparalleled service while pioneering the industry’s most revered brand. From our inception, we have tirelessly evolved, transforming from a nascent entity into a paragon of excellence. We are committed to a forward-thinking business approach: quality as our foundation, market-driven strategies, reputation-building development, and efficiency through astute management. Our commitment to 'technology leadership, standardized management, premium quality, and ultimate customer satisfaction' bolsters our market prowess, aiming to excel in China's electric power and grid sectors with unmatched speed, strength, and ambition. At the heart of our philosophy lies integrity, supreme quality, dedicated service, and the relentless pursuit of customer satisfaction. Our unwavering ambition is to pursue excellence, foster continuous innovation, and cultivate a brand synonymous with trust. Your endorsement fuels our passion. We extend our heartfelt gratitude to our cherished new and longstanding patrons for their unwavering support and trust. Zhejiang ChaoTai looks forward to a bright future of collaboration and success, hand in hand with you.
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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