Product Description
General
The Drop-Out Fuse and Load-Break Drop-Out Fuse are quintessential for outdoor high-voltage electrical protection. These devices are strategically placed on the high-voltage side of distribution transformers or as part of distribution line support, offering robust protection against transformers and line short circuits, overloads, and facilitating co-load current operations. Constructed with an insulating bracket and fuse tubes, static contacts are mounted at each end of this bracket, while moving contacts are affixed to both ends of the fuse tube. The fuse tube itself is an engineering marvel, crafted from an inner arc tube and an outer phenolic paper tube or epoxy glass cloth tube. The load-breaking drop-out fuse is enhanced with auxiliary contacts and an arc chute, offering remarkable flexibility and efficiency in co-load current operations.
During normal operations, the fuse tube is held in a closed position by the fuse's tension. In the event of a system failure, the fault current swiftly blows the fuse, igniting an arc. This arc heats the arc-extinguishing tube, releasing large volumes of gas that generate high pressure within the tube, creating a vertical wind along the pipeline. The arc is swiftly stretched and elongated. Once the fuse blows, the moving contact loses its tension and disengages, triggering the release of the fuse tube, which drops to signify a breaking position. To pull the load, an insulating rod is utilized to disengage the moving contact. Initially, the moving and static contacts remain in touch, but as the insulating rod continues to pull, the auxiliary contacts separate. This separation results in an arc forming between the auxiliary contacts, which is elongated within the hood slit. The arc cover contains gas that extinguishes the arc as soon as the current reaches zero.
Use and Standards
This exceptional product is deployed in 10 ~ 35KV distribution lines, branching lines, and the primary side of distribution transformers, providing unparalleled protection against overloads and short circuits while adeptly managing the separation and combination of the rated load current.
The product model is meticulously crafted following the JB/T8321-1996 Method for AC high-voltage fuses. Its parameters are established based on the GB15166.3-1994 standards for high voltage expulsion fuses. Despite some standards not explicitly defining key parameters and configurations, adjustments are made in accordance with JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses, ensuring cutting-edge technology and precision.
Drop-Out Fuse Cutouts and Load-Switching Fuse Cutouts are indispensable outdoor high-voltage protective devices. They connect seamlessly with the incoming feeder of distribution transformers or distribution lines, providing robust protection against transformer or line short circuits and overloads, as well as ensuring efficient on/off loading currents. The Drop-Out Fuse Cutout comprises insulating supports and a fuse tube, with static contacts secured on the insulator support's two sides and moving contacts affixed at the fuse tube's two ends. The fuse tube features an interior arc-extinguishing tube, with an outer structure crafted from phenolic compound paper or epoxy glass tube. The load-switching fuse cutout is further enhanced with elastic auxiliary contacts and an arc-extinguishing enclosure, providing superior on-off load current operations.
Under normal working conditions, the fuse tube is held securely in a closed position by the tension of the fuse link. Should a system fault occur, the resulting fault current swiftly causes the fuse to melt, generating an electric arc. This arc heats the arc-extinguishing tube, causing it to emit substantial gas, creating high pressure that propels the arc along the tube. Once the fuse link melts, the moving contact loses its tension, unlocking the mechanism and allowing the fuse tube to drop out, marking the cutout's transition to an open position. For cutout load switching, operators use an insulating operating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain in contact; however, as the auxiliary contact is pulled, they separate, creating an electric arc that lengthens within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing enclosure emits gas to extinguish 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
Zhejiang ChaoTai Complete Equipment Co., Ltd. stands proudly as a pioneering high-tech enterprise at the forefront of electrical integration. With a dynamic team of professional R&D, production, and service experts boasting over 15 years of experience, we are dedicated to pushing the boundaries of innovation and excellence.
Our diverse range of advanced products includes sophisticated high-voltage solid-state soft starters, state-of-the-art capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These exceptional products find extensive applications across numerous sectors such as energy and chemical industries, metal smelting, electric power grids, industrial manufacturing, universities and research institutions, medical and pharmaceutical sectors, municipal commerce, water conservancy and hydropower, road traffic, and commercial and residential areas, illustrating our broad impact and commitment to excellence.
Guided by a philosophy of technological innovation and 'smart manufacturing,' we relentlessly pursue excellence by attracting high-level technical talent to bolster our core competitiveness. Our mission is to deliver unparalleled value to customers and establish ourselves as an industry-leading brand. Since inception, Zhejiang ChaoTai has thrived, transforming from humble beginnings to a beacon of industry excellence. We adhere to the principles of innovation and quality, emphasizing a modern business approach: quality as the foundation of survival, market orientation for growth, reputation for development, and management for efficiency. Committed to the ethos of 'technology as the guide, standardized management, superior quality, and customer satisfaction,' we enhance our competitiveness in the market, aiming to serve China's electric power and grid transmission sectors with superior goals. Integrity, quality, service, and customer satisfaction form the pillars of our philosophy. With an unwavering pursuit of excellence and continuous innovation, we strive to build a brand synonymous with trust. Your recognition fuels our journey. We extend heartfelt gratitude to our loyal customers for their unwavering support, and we at Senhang Technology look forward to collaborating to forge a brighter future together.
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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