Product Description
General
Introducing the Drop-out Fuse and Pull Load Drop-out Fuse – your ultimate allies in outdoor high-voltage electrical protection! Expertly engineered for installation on the high-voltage side of distribution transformers or as vital components within distribution lines, these devices are paramount for shielding against transformer and line short circuits, as well as overload scenarios. Their ingenious design ensures seamless opening and co-loading of current. The drop-out fuse showcases a brilliant combination of an insulating bracket and fuse tubes, with static contacts securely placed at both ends of the bracket, complemented by moving contacts affixed to the ends of the fuse tube. Its robust construction features an inner arc tube paired with a resilient outer phenolic paper tube or epoxy glass cloth tube. Elevating performance, the Pull Load Drop-out Fuse is equipped with auxiliary contacts and an arc chute, artfully designed for smooth current load operations.
During routine operations, the drop-out fuse remains firmly closed, with the fuse tube under tension. Upon encountering a system fault, the fault current rapidly melts the fuse, sparking an arc. This arc activates the arc tube, leading to substantial gas decomposition and high-pressure formation inside the tube, creating a vertical wind path that remarkably stretches and elongates the arc. Once the fuse is blown, the moving contact releases tension, swings outward, and the locking mechanism disengages, allowing the fuse tube to drop into a breaking position. For load pulling, an insulating rod is used to draw the moving contact, maintaining contact with the static contact. With continued effort, the auxiliary contacts gently separate, forming an arc between them that stretches within the hood slit. The arc cover, filled with gas, aids in extinguishing the arc as the current reaches zero.
Use and Standards
This exceptional product is meticulously crafted for use in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It delivers steadfast protection against overloads and short circuits while facilitating the effortless separation and combination of the rated load current.
The sophisticated design of this product strictly complies with the JB/T8321-1996 Method for AC high-voltage fuse preparation, while adhering to product parameters that meet the GB15166.3-1994 high voltage fuses Expulsion fuses standards. In cases where standards lack specific definitions for vital parameters and configurations, adjustments are made in accordance with 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 stand as premier outdoor high-voltage protective devices. Engineered to seamlessly connect with the incoming feeder of distribution transformers or lines, they play a pivotal role in safeguarding transformers and lines from short circuit events and overload conditions, managing the on/off load current with precision. The drop-out fuse cutout consists of insulating insulator supports paired with a fuse tube, where static contacts are securely affixed on both sides of the insulator support, and moving contacts are installed at the fuse tube's ends. The fuse tube is equipped with an internal arc-extinguishing tube, complemented by a robust outer phenolic compound paper tube or epoxy glass tube. Similarly, the load switching fuse cutout features enforced elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring efficient on-off load current switching.
Under normal operational conditions, the fuse link maintains the fuse tube in a tightened, closed position. When faults arise, the fault current instantaneously melts the fuse, igniting an electric arc. This heats the arc-extinguishing tube, releasing a large volume of gas that creates high pressure and elongates the arc throughout the tube. After the fuse link melts, the moving contact loses tension, allowing the mechanism to lock and the fuse tube to drop out, transitioning to an open position. For load switching during cutout, operators utilize 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 pulled, an electric arc forms between the auxiliary contacts, elongating within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism expels 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 and excellence in the realm of electrical integration. As a dynamic high-tech enterprise, we are proud to present a seasoned R&D, production, and service team, enriched by an impressive journey of over 15 years of dedicated industry expertise.
Our extensive product portfolio features high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These high-performance products are pivotal to an array of sectors, such as the energy and chemical industries, metal smelting, vast electric power grids, industrial manufacturing, and prestigious universities and research institutions. Moreover, our solutions empower the medical and pharmaceutical sectors, bolster municipal commerce, enhance water conservancy and hydropower projects, optimize road traffic systems, and enrich commercial and residential developments.
Firmly rooted in a steadfast commitment to technological innovation and the philosophy of "smart manufacturing," we dedicate ourselves to attracting top-tier technical talent, aiming to holistically elevate our company's core competitive edge. We are fervently devoted to delivering unparalleled value to our clients and aspire to forge the most esteemed brand within the industry. Since our inception, we have made relentless strides, transforming from inception to excellence. Our journey is paved with a commitment to innovation and is sustained by a modern business ethos, emphasizing quality as our lifeline, market orientation, reputation-driven development, and management-driven efficiency. We steadfastly uphold our commitment to "technology as the guide, standardized management, exceptional quality, and customer satisfaction" as our guiding tenets in quality and technical talent management, diligently working to bolster our market presence. Our mission is to serve China's electric power and grid transmission and distribution fields with increasing speed, strength, and ambition. At our core, integrity is non-negotiable, quality is sacrosanct, 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 our guiding principles. Your recognition is the catalyst that fuels our progress. We extend our heartfelt gratitude to all our loyal clients for their enduring support, and Senhang Technology 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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