Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage electrical protection solutions. These advanced devices are expertly positioned on the high-voltage side of distribution transformers or integrated as vital support links within distribution lines. They act as indispensable guardians against transformer and line short circuits, and overload conditions, while also facilitating the safe opening and co-loading of current. Ingeniously designed, the drop-out fuse features an insulating bracket and fuse tubes, with static contacts securely affixed at both ends of the bracket and moving contacts precisely attached to the fuse tube ends. The fuse tube's construction boasts an inner arc tube ingeniously paired with an outer phenolic paper or epoxy glass cloth tube. The Pull Load Drop-out Fuse provides superior flexibility through its auxiliary contacts and an arc chute, all specifically engineered for flawless current load operations.
During routine operations, the drop-out fuse remains firmly held in a closed position with the fuse tube meticulously tensioned. However, when system malfunctions occur, the fault current rapidly blows the fuse, generating a fierce arc. This arc ignites the arc tube, causing it to decompose and release large volumes of gas, creating high pressure within the tube, and generating a powerful vertical wind path. This remarkable process swiftly stretches and lengthens the arc. Once the fuse is blown, the moving contact releases tension and rotates outwards, allowing the locking mechanism to disengage, letting the fuse tube drop to a breaking position. When it’s time to pull the load, an insulating rod comes into play to pull the moving contact, ensuring continued contact with the static contact. With continued effort, the auxiliary contacts separate, creating an arc that stretches within the hood slit. The arc cover, filled with gas, assists in extinguishing the arc as the current reaches its zero crossing.
Use and Standards
This exceptional product is meticulously engineered for deployment in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It offers robust protection against overloads and short circuits, while simultaneously facilitating the efficient separation and combination of the rated load current.
This product's design follows the rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation, while its parameters align with the GB15166.3-1994 High Voltage Fuses Expulsion Fuses standards. When the standards lack detailed definitions of critical parameters and configurations, adjustments are made according to the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high-voltage drop fuses.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are preeminent outdoor high-voltage protective devices. Designed to seamlessly connect with incoming feeders of distribution transformers or lines, they play a crucial role in safeguarding transformers and lines from short circuit incidents and overload conditions while proficiently managing the on/off load current. The drop-out fuse cutout consists of insulating insulator supports and a fuse tube, with static contacts securely fixed on both sides of the insulator support and moving contacts expertly installed at the ends of the fuse tube. The fuse tube features an internal arc-extinguishing tube, complemented by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout includes robust elastic auxiliary contacts and an arc-extinguishing enclosure for efficient on-off load current switching.
In standard operational scenarios, the fuse link ensures the fuse tube is tightly secured to maintain a closed position. Upon encountering faults, the fault current causes the fuse to melt instantly, giving rise to an electric arc. This significant event causes the arc-extinguishing tube to heat and expel a substantial volume of gas, creating high pressure and extending the arc throughout the tube. Once the fuse link melts, the moving contact loses its tension, enabling the mechanism to lock, allowing the fuse tube to drop, thereby switching to an open position. For load switching during cutout, operators must skillfully use an insulating operating bar to pull the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact is further manipulated, an electric arc forms between the auxiliary contacts, extending within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism expels gas to extinguish the arc as the current transitions 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 as a beacon of innovation and excellence in the world of electrical integration. As a dynamic high-tech enterprise, we are proud to offer a seasoned R&D, production, and service team, enriched with over 15 years of dedicated industry expertise.
Our extensive array of products includes high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These high-performance solutions are vital to a diverse range of sectors, such as energy and chemicals, metal smelting, expansive electric power grids, industrial manufacturing, and esteemed universities and research facilities. Additionally, our innovative solutions empower the medical and pharmaceutical sectors, strengthen municipal commerce, enhance water conservancy and hydropower projects, optimize road traffic systems, and enrich both commercial and residential developments.
Driven by an unwavering commitment to technological innovation and guided by the philosophy of 'smart manufacturing,' we are dedicated to attracting top-tier technical talent to enhance our company's core competitive edge. We are passionately committed to delivering unmatched value to our clients and aspire to create the most esteemed brand in the industry. Since our inception, we have made relentless progress, evolving from the ground up to reach new heights. Our journey is marked by a dedication to innovation, sustained by a modern business ethos that emphasizes quality as our lifeline, market orientation, reputation-driven development, and management-driven efficiency. We consistently adhere to our guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction,' diligently working to enhance our market presence. Our mission is to serve China's electric power and grid transmission and distribution sectors with increasing speed, strength, and ambition. At our core, integrity is non-negotiable, quality is sacred, service reigns supreme, and customer satisfaction is our eternal creed. Our unwavering pursuit of excellence, relentless innovation, and dedication to building a trustworthy brand remain the cornerstones of our philosophy. Your recognition is the catalyst for our progress. We extend our sincere gratitude to all our loyal clients for their enduring support, and Zhejiang Chaotai Complete Equipment Co., Ltd. eagerly anticipates collaborating with you 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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