Product Description
General
Our Drop-out Fuse and Load Drop-out Fuse are cutting-edge solutions designed to ensure robust outdoor high-voltage electrical protection. These devices, meticulously crafted for installation on the high-voltage side of distribution transformers or as a Support Link on distribution lines, provide essential short circuit and overload protection. Constructed with a durable insulating bracket and a high-performance fuse tube, each unit features static contacts securely installed at each end of the insulation bracket and moving contacts on the fuse tube. The fuse tube itself is a marvel of engineering, comprising an inner arc tube and an exterior made from phenolic paper or epoxy glass cloth. Our Pull Load Drop-out Fuse further enhances functionality with flexible auxiliary contacts and an arc chute, offering superior performance in opening and closing load currents.
During standard operations, the drop-out fuse remains in a closed position, maintained by the tension of the fuse tube. Upon a fault in the system, the fault current swiftly blows the fuse, creating an arc. This electrifying event activates the arc tube, releasing large volumes of gas and generating high pressure. This pressure crafts a powerful vertical wind, elongating and extinguishing the arc rapidly. Once the fuse is blown, the moving contact loses its tension, triggering the locking mechanism to release the fuse tube, thus dropping it to create an open circuit. For load operations, an insulating rod is used to manipulate the moving contact. Initially, the moving and static contacts remain engaged, but further pulling separates the auxiliary contacts, establishing an arc that is quickly managed by the arc chute. The gas within the arc cover aids in extinguishing the arc when the current reaches zero.
Use and Standards
Our cutting-edge product is tailored for use in 10 to 35KV distribution line branching and on the primary side of distribution transformers. It offers exceptional protection against overload and short circuit conditions, ensuring reliable Separation and Combination of the rated load current.
Crafted in accordance with JB/T8321-1996 standards for AC high-voltage fuses, our product is engineered with precision to meet the stringent demands of GB15166.3-1994 standards for high voltage expulsion fuses. While these standards may not explicitly define parameters and configurations, we adhere to JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses, ensuring superior performance and reliability.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are vital outdoor high-voltage protective devices. They seamlessly connect with the incoming feeder of distribution transformers or lines, offering essential protection against short circuits, overloads, and managing on/off loading currents. Each cutout is designed with insulated support and a fuse tube, featuring static contacts affixed firmly on either side of the insulator support and moving contacts at both ends of the fuse tube. The fuse tube is designed with an innovative arc-extinguishing inner tube and an outer layer made from phenolic compound paper or epoxy glass. The load switching fuse cutout boasts enforced elastic auxiliary contacts and an arc-extinguishing enclosure, excelling in switching on and off loading currents.
Under normal working conditions, the fuse link ensures the fuse tube remains securely closed. In the event of a fault, the fault current instantly melts the fuse, generating an electric arc that heats the arc-extinguishing tube, leading to the release of a vast amount of gas. This results in high pressure and a blow of the arc along the tube. With the fuse link melted, the moving contact loses its tension, locking the mechanism, and the fuse tube drops, transitioning the cutout to an open position. During load switching, operators use an insulating bar to maneuver the moving contact, initially maintaining contact with the auxiliary static contact. As the auxiliary contact separates, an arc forms and extends within the arc-extinguishing enclosure. Meanwhile, the gas explodes to extinguish the arc as the current zeros out.
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 pinnacle of innovation in the realm of electrical integration, proudly carrying the badge of a high-tech enterprise. Our esteemed organization boasts a formidable R&D, production, and service team, fortified by over 15 years of rich industry experience, shaping our reputation as pioneers in our field.
Our product portfolio is a testament to advanced engineering, featuring high-voltage solid-state soft starters, capacitor cabinets, an array of high and low voltage switchgear, cutting-edge gas-insulated switchgear, and state-of-the-art substations. These products have found their indispensable place across a multitude of sectors including energy and chemical industries, metal smelting, expansive electric power grids, industrial manufacturing, prestigious universities and research institutions, the dynamic medical and pharmaceutical sectors, municipal commerce, water conservancy, hydropower sectors, road traffic management, and both commercial and residential developments.
Embracing the spirit of innovation, we at Zhejiang ChaoTai adhere steadfastly to the philosophy of 'smart manufacturing,' propelling us to recruit top-tier technical talent to bolster our core competitive edge. Our mission is clear: deliver unparalleled services to our clientele while aspiring to establish the industry’s premier brand. Our journey from inception to excellence has been driven by relentless progress, underpinning our commitment to quality as we carve a modern business path that thrives on market orientation, reputation-based development, and efficiency achieved through strategic management. Our guiding principle remains technology-driven leadership, standardized management, superior quality, and above all, customer satisfaction. These principles enhance our market competitiveness as we aim to serve China’s electric power grid transmission and distribution sectors with unprecedented speed, strength, and ambition. Integrity forms our foundation, quality is our priority, and service excellence is our hallmark, ensuring that customer satisfaction remains our eternal pursuit. Zhejiang ChaoTai is dedicated to consistent excellence, continuous innovation, and establishing itself as a trustworthy brand—a goal that remains unyielding in our path. Your trust propels us forward, and we extend our heartfelt gratitude to all our esteemed customers for their unwavering support. With Senhang Technology, we envision a collaborative journey toward a brighter, shared 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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