Product Description
General
Introducing our cutting-edge Drop-out Fuse and Pull Load Drop-out Fuse, engineered for superior outdoor high-voltage electrical protection. Specifically designed for installation at the high-voltage side of distribution transformers or within the Support Link of distribution lines, these fuses provide robust protection against short circuits and overloads. Our Drop-out Fuse features an insulating bracket and a fuse tube with strategically placed static and moving contacts. The fuse tube is composed of an inner arc tube and an outer casing, which can be made of phenolic paper or epoxy glass cloth. The Pull Load Drop-out Fuse is enhanced with flexible auxiliary contacts and an arc chute to manage current co-loads efficiently.
During normal operation, the Drop-out Fuse forms a closed position, maintained by the tension of the fuse tube. In the event of a system fault, the fault current quickly blows the fuse and generates an arc. The arc heats the arc tube, releasing significant gas that creates high pressure and vertical wind within the tube, effectively elongating and extinguishing the arc. Once the fuse blows, the moving contact loses tension and disengages, triggering the locking mechanism and releasing the fuse tube, which drops to indicate an open position. For load handling, use an insulating rod to pull the moving contact, separating it from the static contact. This action stretches an arc between auxiliary contacts, which is then extinguished as gas within the arc cover acts when the current reaches zero.
Use and Standards
Designed for 10 ~ 35KV distribution lines and transformer primary sides, this product offers reliable overload and short circuit protection, ensuring safe load separation and combination at rated currents.
Our product adheres to JB/T8321-1996 standards for AC high-voltage fuses and is crafted in compliance with GB15166.3-1994 standards for expulsion fuses. Where these standards lack specificity, adjustments are made in accordance with JB/DQ2139-1986 for 10 ~ 35KV outdoor high voltage drop fuses, ensuring up-to-date technical excellence.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are advanced outdoor high voltage protective devices. Ideal for connection with incoming feeder lines of distribution transformers or lines, they safeguard against transformer or line short circuits and overloads, while managing on/off load current seamlessly. The Drop-out Fuse Cutout is constructed with insulator supports and a fuse tube featuring static contacts on either side. Moving contacts are fitted to the ends of the fuse tube, which includes an arc-extinguishing tube and an outer structure made from phenolic paper or epoxy glass. Our load switching fuse cutouts come with additional elastic auxiliary contacts and an arc-extinguishing enclosure for proficient current management.
In standard operations, the fuse tube, secured by a fuse link, maintains a closed position. Upon system faults, the fault current melts the fuse, creating an electric arc that heats and expands the arc-extinguishing tube, releasing gases to generate high pressure and extinguish the arc. When the fuse link melts, the moving contact loses tension, triggering the mechanism to release the fuse tube, moving the cutout to an open position. For load switching, use an insulating operating bar to pull the moving contact. Initially, the main contact and auxiliary contacts remain connected. As the pulling continues, separation of auxiliary contacts occurs, forming an arc that is elongated within the arc-extinguishing enclosure, where gases extinguish the arc as the current passes 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 beacon of innovation in the realm of electrical integration. Our high-tech enterprise stands tall with a dedicated team of R&D, production, and service experts, boasting over 15 years of rich industry expertise. We are committed to leading the way in technological advancements, offering unparalleled excellence and cutting-edge solutions in the electrical sector.
Our flagship offerings encompass a diverse array of sophisticated products, including high-voltage solid-state soft starters, capacitor cabinets, dynamic high and low voltage switchgear, versatile gas-insulated switchgear, and state-of-the-art substations. These products are the cornerstone of various industries, effectively serving the energy and chemical sectors, metal smelting operations, power grids, industrial manufacturing, educational and research institutions, as well as the medical and pharmaceutical fields. Additionally, our solutions are integral to municipal commerce, water conservancy, hydropower projects, road traffic systems, and both commercial and residential infrastructures.
At Zhejiang ChaoTai, our commitment to technological innovation is unwavering, guided by our philosophy of 'smart manufacturing.' We continually attract and nurture top-tier technical talent to solidify our competitive edge, delivering unmatched value to our clientele. Our journey, from inception to a pinnacle of success, is marked by relentless progress and excellence. Our business ethos emphasizes quality as the foundation for survival, reputation as a catalyst for development, and efficient management as a key to success. We are steadfast in our mission to champion 'technology-led operations, streamlined management, superior quality, and customer satisfaction.' This approach enhances our market standing while propelling our service to China's power transmission and distribution sectors with unparalleled speed, strength, and ambition. Integrity, quality, and service form the pillars of our philosophy, with customer satisfaction being our perpetual goal. We are dedicated to continuous innovation and aspire to cultivate a brand synonymous with trust and excellence. Your trust inspires us, and we extend our heartfelt gratitude to loyal and new customers alike. Together with Senhang Technology, we eagerly anticipate forging 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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