Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse stand as the pinnacle of outdoor high-voltage electrical protection, showcasing a masterpiece of engineering designed for excellence. Strategically located on the high-voltage side of distribution transformers or serving as indispensable support links in distribution lines, they are formidable shields against transformer and line short circuits, and overload situations. These marvels of innovation not only enable seamless current management for opening and loading but also represent a triumph in design and functionality. Each drop-out fuse is crafted with a robust insulating bracket, dynamic fuse tubes, and secure static contacts, elegantly complemented by moving contacts at the ends of the fuse tube. The fuse tube, a crowning achievement, features an advanced inner arc tube of the highest caliber, encased in a resilient outer phenolic paper tube or epoxy glass cloth. The Pull Load Drop-out Fuse elevates its versatility with auxiliary contacts and a meticulously engineered arc chute, ensuring smooth current load transitions.
During standard operations, the drop-out fuse is steadfastly secured in a closed position, with the fuse tube held under precise tension. As system faults arise, the fault current swiftly activates, blowing the fuse and igniting an arc. This dynamic arc triggers the arc tube, which breaks down to release a considerable volume of gas, forging high pressure to create a vertical wind path that masterfully stretches and elongates the arc. Upon the fuse's activation, the moving contact is released, gracefully rotating outward as the locking mechanism disengages, permitting the fuse tube to descend to a definitive open position. For load pulling operations, an insulating rod is skillfully employed to extract the moving contact, maintaining connection with the static contact. With consistent force, the auxiliary contacts separate, causing an arc that elegantly extends within the hood slit. The arc cover efficiently contains the gas, promoting effective arc extinguishment as the current nears zero.
Applications and Compliance Standards
Meticulously designed for ultimate deployment, this product excels within 10 to 35KV distribution lines, spanning branching lines and the primary side of distribution transformers. It delivers unwavering protection against overloads and short circuits while ensuring effective separation and combination of the rated load current, exemplifying reliability at its core.
The precision-engineered design of this product is a testament to excellence, meticulously adhering to the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters impeccably align with the prestigious GB15166.3-1994 standards for high voltage fuses, known as Expulsion fuses. In scenarios lacking detailed definitions, adjustments are expertly tailored following the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses, ensuring superior performance.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout epitomize the zenith of high-performance outdoor high-voltage protective devices. With meticulous design, they seamlessly connect with the incoming feeder of distribution transformers or lines, serving a crucial role in safeguarding transformers and lines from short circuit incidents and overload conditions, while expertly managing the on/off load current. The drop-out fuse cutout is composed of robust insulating supports and a dynamic fuse tube, with static contacts strategically fixed on each side and moving contacts adeptly affixed at the tube's ends. The fuse tube features a sophisticated internal arc-extinguishing tube, enhanced by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also integrates high-performance, elastic auxiliary contacts and a state-of-the-art arc-extinguishing enclosure, facilitating efficient on-off load current switching.
In typical operational scenarios, the fuse link ensures the fuse tube remains securely closed. Upon fault detection, the fault current acts with precision, swiftly melting the fuse and generating an electric arc that heats the arc-extinguishing tube. This results in the release of substantial volumes of gas, creating high pressure to elongate the arc within the tube. Once melted, the moving contact loses tension, triggering the mechanism to lock and allowing the fuse tube to gracefully drop out, transitioning to the open position. For cutout load switching, operators skillfully use an insulating operating bar to draw the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact is further withdrawn, an electric arc forms between them, extending within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to efficiently extinguish the arc as the current reaches zero, ensuring seamless operation.
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. is a beacon of innovation and excellence in the ever-evolving world of electrical integration. As a dynamic high-tech enterprise, we proudly present a seasoned R&D, production, and service team equipped with over 15 years of steadfast dedication and industry expertise.
Our extensive product catalog includes high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and durable substations. These top-tier products are vital across diverse sectors, powering the energy and chemical industries, metal smelting, expansive electrical grids, industrial manufacturing, and esteemed universities and research institutions. Additionally, our innovative solutions energize the medical and pharmaceutical domains, bolster municipal commerce, enhance water conservation and hydropower projects, optimize road traffic systems, and elevate both commercial and residential developments.
Rooted in a steadfast commitment to technological advancement and the philosophy of 'smart manufacturing,' we are dedicated to attracting premier technical talent to significantly bolster our core competitive edge. Our mission is to provide unparalleled value to our clients, striving to establish the most prestigious brand in the industry. From our inception, our journey has been one of relentless progress, driven by innovation and sustained by a modern business ethos. Quality is our lifeline, market orientation is critical, reputation-driven growth is paramount, and efficiency is achieved through strategic management. We strictly adhere to the principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and talent management, diligently expanding our market footprint. Our mission is to serve China's electric power and grid transmission and distribution sectors with increasing speed, vigor, and ambition. Integrity, quality, service, and customer satisfaction are our unwavering commitments. Our relentless pursuit of excellence, continuous innovation, and dedication to building a trusted brand are our guiding forces. Your recognition fuels our journey. We extend our deepest gratitude to our loyal clients for their steadfast support, and Senhang Technology looks forward to partnering with you to create 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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