Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse stand as the pinnacle of excellence in outdoor high-voltage electrical protection. Masterfully crafted, these devices are precisely placed on the high-voltage side of distribution transformers or serve as pivotal components within distribution lines. They stand as vigilant protectors against transformer and line short circuits, manage overloads with finesse, and enable smooth current management for opening and loading. With a design that radiates innovation, the drop-out fuse features an insulating bracket and fuse tubes, securely anchored static contacts at each end, while elegantly attached moving contacts enhance the ends of the fuse tube. The fuse tube is equipped with an advanced inner arc tube, coupled with a durable outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse is notable for its exceptional versatility, featuring auxiliary contacts and a meticulously designed arc chute to enable smooth current load transitions.
Under normal circumstances, the drop-out fuse is securely fastened in a closed position, with the fuse tube held under precise tension. When system faults occur, the fault current promptly acts, blowing the fuse and igniting an arc. This vigorous arc activates the arc tube, decomposing a significant volume of gas and creating high pressure to skillfully extend and elongate the arc. As the fuse blows, the moving contact releases, elegantly rotating outwards while the locking mechanism disengages, allowing the fuse tube to descend gracefully to reach a definitive breaking position. When load pulling is required, an insulating rod is used to draw out the moving contact while maintaining a connection with the static contact. With continued force application, auxiliary contacts separate, generating an arc that stretches gracefully within the hood slit. The arc cover efficiently contains the gas, facilitating effective arc extinguishment as the current approaches zero.
Applications and Compliance Standards
This distinguished product is meticulously designed for implementation in 10 to 35KV distribution lines, covering branching lines and the primary side of distribution transformers. It provides steadfast protection against overloads and short circuits while ensuring efficient separation and combination of the rated load current.
The precision-engineered design of this product adheres to the rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters align seamlessly with the esteemed GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In cases where specific definitions are not provided, 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 epitomize high-performance outdoor high-voltage protective devices. Expertly crafted to connect with the incoming feeder of distribution transformers or lines, they play a critical role in safeguarding transformers and lines from short circuit incidents and overload conditions while adeptly managing the on/off load current. The drop-out fuse cutout consists of robust insulating supports and a fuse tube, with static contacts strategically secured on both sides and moving contacts carefully affixed at the ends of the fuse tube. The fuse tube features a sophisticated internal arc-extinguishing tube, complemented by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also includes high-performance, flexible auxiliary contacts and an arc-extinguishing enclosure for effective on-off load current switching.
In typical operational scenarios, the fuse link ensures the fuse tube remains securely closed. Upon detecting faults, the fault current swiftly melts the fuse, creating an electric arc that heats the arc-extinguishing tube, releasing a substantial volume of gas and creating high pressure to elongate the arc within the tube. Once melted, the moving contact loses tension, allowing the mechanism to lock, and the fuse tube to gracefully drop out, shifting to an open position. For cutout load switching, operators skillfully utilize 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 pulled, an electric arc forms between them, extending gracefully within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to efficiently extinguish the arc as the current passes 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. emerges as a shining exemplar of cutting-edge innovation and unmatched excellence in the ever-evolving sphere of electrical integration. Proudly positioned as a dynamic high-tech enterprise, we boast a formidable team of research and development, production, and service professionals, all equipped with over 15 years of steadfast dedication and profound expertise in the field. Our unwavering commitment to innovation sets us apart.
Our extensive suite of products includes high-voltage solid-state soft starters, meticulously crafted capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These top-tier offerings are vital across diverse sectors, providing critical solutions to the energy and chemical industries, metal smelting, expansive power grids, and industrial manufacturing. Moreover, they support esteemed universities, advance research institutions, invigorate the medical and pharmaceutical sectors, facilitate municipal commerce, and enhance water conservation and hydropower initiatives. They further optimize road traffic systems and contribute to commercial and residential advancements.
Rooted in a steadfast commitment to technological advancement and the guiding ethos of 'smart manufacturing,' we are dedicated to attracting premier technical talent, thereby amplifying our core competitive edge. Our devotion to delivering unparalleled value to our clients fuels our aspiration to establish the industry's most esteemed brand. Our evolution from inception to excellence is marked by relentless progress, driven by a modern business ethos where quality is paramount, market focus is essential, growth is reputation-driven, and efficiency thrives through strategic management. We adhere strictly to the principles of 'technology-led guidance, standardized management, superior quality, and ultimate customer satisfaction' in our quality and technical talent management, as we diligently expand our market presence. Our mission is to serve China's electric power and grid transmission and distribution sectors with escalating speed, power, and ambition. At our essence, integrity remains paramount, quality is sacrosanct, service reigns supreme, and customer satisfaction is our eternal creed. Our relentless pursuit of excellence, ceaseless innovation, and dedication to building a brand of trust propel us forward. Your appreciation fuels our journey. We express our deepest gratitude to our loyal clients for their unwavering support, and Senhang Technology is poised to collaborate with you in shaping a promising 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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