Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are essential outdoor high-voltage protective devices designed for electrical systems. These fuses are primarily installed on the high-voltage side of distribution transformers or at the distribution line support links, providing vital protection against transformer and line short circuits, overloads, and enabling open, co-load current operations. The Drop-out Fuse comprises an insulating bracket and fuse tubes, with static contacts at each end of the bracket and moving contacts at each end of the fuse tube. The fuse tube features an inner arc tube and an outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse includes enhanced flexibility with auxiliary contacts and an arc chute, ensuring efficient open, co-load current management.
During normal operations, the Drop-out Fuse's tube, under tension, maintains a closed position. When a system fault occurs, the fault current swiftly blows the fuse, creating an arc. This arc triggers the arc tube to decompose, releasing large gas volumes that generate high pressure within the tube, promoting a vertical wind along the pipeline. This process swiftly stretches and elongates the arc. Once the fuse is blown, the moving contact loses tension, triggering the locking mechanism to release the fuse tube, resulting in a breaking position. To pull the load, an insulating rod is used to manipulate the moving contact. Initially, the moving and static contacts remain engaged. With continued manipulation, the auxiliary contacts separate, producing an arc between them. This arc stretches within the hood slit, while the arc cover releases gas. As the current reaches zero, the arc extinguishes.
Use and Standards
This product is designed for application in 10 to 35KV distribution line branches and the primary side of distribution transformers, serving as overload and short circuit protection. It is adept at facilitating the separation and combination of the rated load current, ensuring robust and reliable performance.
The product model is crafted in accordance with JB/T8321-1996 Method of type AC high-voltage fuses. The product parameters align with the GB15166.3-1994 high voltage fuses Expulsion fuses standards. Where the standards lack specific parameter and configuration definitions, adjustments are made following the JB/DQ2139-198610 ~ 35KV outdoor high voltage drop fuse interim technology requirements, ensuring precision and compliance.
Drop-out Fuse Cutout and Load Switching Fuse Cutout are state-of-the-art outdoor high voltage protective devices. They seamlessly connect with the incoming feeder of distribution transformers or lines, offering paramount protection against transformer and line short circuits and overloads, while managing on/off loading current efficiently. These devices consist of insulate insulator supports and a fuse tube, with static contacts secured on the insulator support's sides and moving contacts positioned on the fuse tube's ends. The fuse tube is crafted with an inside arc-extinguishing tube, enclosed by an outer phenolic compound paper tube or epoxy glass tube. The Load Switching Fuse Cutout is equipped with enforced elastic auxiliary contacts and an arc-extinguishing enclosure, enhancing its switching on-off loading current capabilities.
In typical operation, the fuse link's tension secures the fuse tube, forming a closed position. Should a system fault occur, the consequent fault current promptly melts the fuse, generating an electric arc. This action heats the arc-extinguishing tube, producing copious gas amounts, elevating pressure, and directing a powerful blow along the tube. Upon the fuse link melting, the moving contact loses tension, locking the mechanism and causing the fuse tube to drop, initiating an open position. For cutout loading requiring switch-off, an operator uses an insulating operating bar to pull the moving contact. Initially, main and auxiliary static contacts remain engaged. As the operator continues, the auxiliary contacts separate, producing an electric arc which elongates within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing process releases gas to extinguish the arc as the current reaches 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 as a beacon of innovation in the realm of electrical integration. As a high-tech enterprise, we boast an exceptional R&D, production, and service team, enriched with over 15 years of profound industry expertise.
Our extensive product line features high-voltage solid-state soft starters, cutting-edge capacitor cabinets, versatile high and low voltage switchgear, sophisticated gas-insulated switchgear, and robust substations. These advanced solutions are integral to a myriad of sectors, including energy and chemical industries, metal smelting, power grids, industrial manufacturing, academia, healthcare, municipal commerce, water conservancy and hydropower, road traffic, and both commercial and residential domains.
Firmly committed to innovation and the philosophy of 'smart manufacturing,' we aggressively recruit top-tier technical talents to bolster our core competitiveness. Our mission is to deliver unparalleled value to our customers while aspiring to be the benchmark brand in the industry. Since our inception, we have made significant strides, transforming from humble beginnings to industry excellence. Our commitment to innovation is unwavering, guided by a modern business strategy grounded in quality for survival, market orientation, reputation for development, and management for efficiency. Our pledge is to leverage technology as our compass, implement standardized management, ensure superior quality, and achieve customer satisfaction, thus amplifying our market competitiveness. We are dedicated to advancing China's power and grid sectors with ambition and vigor. Integrity is our foundation, quality is our hallmark, service is our priority, and customer satisfaction is our ultimate goal. We relentlessly pursue excellence and foster continuous innovation, striving to establish a brand synonymous with trust. Your recognition fuels our passion. We extend our heartfelt gratitude to all our valued customers for their unwavering support and loyalty. Zhejiang Chaotai eagerly anticipates collaborating with you to forge a brighter 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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