Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are quintessential solutions for outdoor high-voltage electrical protection. Strategically positioned on the high-voltage side of distribution transformers or as essential links in distribution lines, these devices are indispensable safeguards against transformer and line short circuits, overload conditions, and they expertly facilitate the opening and co-loading of current. Ingeniously crafted, the drop-out fuse features an insulating bracket and fuse tubes, with static contacts affixed at both ends of the bracket and moving contacts attached to the ends of the fuse tube. The construction of the fuse tube is exceptional, featuring an inner arc tube coupled with an outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse offers enhanced flexibility, thanks to auxiliary contacts and an arc chute, designed for seamless current load operations, making it an ideal choice for reliable performance in the field.
During standard operations, the drop-out fuse is securely held in a closed position with the fuse tube tensioned. Upon a system malfunction, the fault current promptly blows the fuse, generating an arc. This arc ignites the arc tube, causing substantial gas volume decomposition, creating high pressure inside the tube, and generating a vertical wind path. This remarkable mechanism quickly stretches and elongates the arc. Once the fuse has blown, the moving contact releases tension and rotates outwards, while the locking mechanism disengages, allowing the fuse tube to gracefully drop and achieve a breaking position. When it becomes necessary to pull the load, an insulating rod is employed to pull the moving contact, maintaining contact with the static contact. With continued effort, the auxiliary contacts separate, creating an arc between them that is stretched within the hood slit. The arc cover, which contains gas, facilitates arc extinguishment as the current reaches zero, ensuring safe and effective load management.
Use and Standards
This distinguished product is specially engineered for deployment in 10 to 35KV distribution lines, including branching lines and on the primary side of distribution transformers. It provides robust protection against overloads and short circuits while enabling efficient separation and combination of the rated load current, ensuring the highest standards of safety and performance.
The meticulous design of this product adheres to the JB/T8321-1996 Method for AC high-voltage fuse preparation, while the product parameters conform to GB15166.3-1994 high voltage fuses Expulsion fuses standards. In instances where the standards lack detailed definitions of critical parameters and configurations, adjustments are meticulously made following the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses, ensuring comprehensive compliance and reliability.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are premier outdoor high-voltage protective devices. Designed to connect with the incoming feeder of distribution transformers or lines, they play a crucial role in safeguarding transformers and lines from short circuit incidents and overload conditions while managing the on/off load current with precision. The drop-out fuse cutout comprises insulating insulator supports and a fuse tube, with static contacts fixed on both sides of the insulator support and moving contacts installed at the ends of the fuse tube. The fuse tube features an internal arc-extinguishing tube along with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout includes enforced elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring efficient on/off load current switching and supreme operational dependability.
In normal operational scenarios, the fuse link ensures the fuse tube is tightened to maintain a closed position. When faults occur, the fault current causes the fuse to melt immediately, generating an electric arc. This causes the arc-extinguishing tube to heat and release a significant volume of gas, creating high pressure and elongating the arc throughout the tube. After the fuse link melts, the moving contact loses its tension, allowing the mechanism to lock and the fuse tube to drop out, switching to an open position. For load switching during cutout, operators must 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 pulled, an electric arc forms between the auxiliary contacts, elongating within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to extinguish the arc as the current passes through zero, ensuring efficient and safe load management.
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 within the electrical integration industry. This vibrant high-tech enterprise is powered by an accomplished team of R&D, production, and service experts, drawing on a rich tapestry of over 15 years of dedicated industry experience to deliver top-tier solutions.
Our diverse and dynamic product portfolio includes cutting-edge high-voltage solid-state soft starters, sophisticated capacitor cabinets, both high and low voltage switchgears, advanced gas-insulated switchgear, and durable substations. These high-performance offerings are pivotal across a wide range of sectors, from the energy and chemical industries to metal smelting and expansive electric power grids. They are indispensable in industrial manufacturing, prestigious universities, and research institutions. Further, our innovative solutions empower the medical and pharmaceutical sectors, reinforce municipal commerce, enhance water conservancy and hydropower projects, streamline road traffic systems, and enrich both commercial and residential developments with unparalleled efficiency and reliability.
With unwavering dedication to technological innovation and the ethos of 'smart manufacturing,' we are committed to attracting premier technical talent to comprehensively elevate our company's core competitive advantages. Our dedication to delivering unmatched value to our clients is relentless, as we strive to establish the industry's most esteemed brand. From our very inception, we've pursued excellence with tenacity, guided by a modern business philosophy that hails quality as our lifeline and champions market-oriented, reputation-driven growth with management-fueled efficiency. Our steadfast adherence to the principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' forms the backbone of our quality and technical talent management strategies, as we diligently work to enhance our market footprint. Our mission is to serve China's electric power and grid transmission and distribution sectors with greater speed, strength, and ambition. At the heart of our operations, integrity is non-negotiable, quality is paramount, service is sovereign, and customer satisfaction remains our perpetual creed. Our relentless pursuit of excellence, continuous innovation, and unwavering commitment to building a reputable brand are our guiding lights. Your recognition propels us forward. We offer our heartfelt gratitude to all our loyal clients for their unwavering support, and Senhang Technology is excited to collaborate with you in crafting a future brimming with possibilities.
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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