Product Description
General Information
The Drop-out Fuse and Pull Load Drop-out Fuse are the epitome of excellence in outdoor high-voltage electrical protection. Skillfully designed, these devices are strategically placed either on the high-voltage side of distribution transformers or serve as pivotal support links in distribution lines. Acting as vigilant guardians, they provide indispensable protection against transformer and line short circuits, overload conditions, and efficiently facilitate the opening and co-loading of current. The drop-out fuse is masterfully crafted with an insulating bracket and fuse tubes, featuring static contacts fixed at both ends of the bracket and moving contacts at the ends of the fuse tube. The fuse tube construction includes an inner arc tube, elegantly paired with an outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse offers superior adaptability with auxiliary contacts and an arc chute, specifically engineered for smooth current load operations.
During routine operations, the drop-out fuse is firmly secured in a closed position with the fuse tube under tension. In the event of a system malfunction, the fault current swiftly causes the fuse to blow, creating an arc. This arc ignites the arc tube, leading to the decomposition of large gas volumes, which in turn generates high pressure inside the tube and a vertical wind path. This ingenious mechanism rapidly stretches and elongates the arc. Once the fuse has blown, the moving contact releases its tension and rotates outward as the locking mechanism disengages, allowing the fuse tube to drop and achieve a breaking position. When the load needs to be pulled, an insulating rod is used to draw the moving contact while it maintains contact with the static contact. With continued effort, the auxiliary contacts part, generating an arc between them which is extended within the hood slit. The gas-contained arc cover aids in extinguishing the arc as the current reaches zero.
Use and Standards
This exceptional product is meticulously crafted for application in 10 to 35KV distribution lines, including branching lines and on the primary side of distribution transformers. It provides formidable protection against overloads and short circuits, while facilitating the efficient separation and integration of the rated load current.
The precision design of this product adheres strictly to the JB/T8321-1996 Method for AC high-voltage fuse preparation, and its parameters align with GB15166.3-1994 high voltage fuses Expulsion fuses standards. In instances where the standards offer limited definitions of crucial parameters and configurations, necessary 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 out as premier solutions for outdoor high-voltage protection. They are designed to integrate with the incoming feeder of distribution transformers or lines, playing an indispensable role in defending transformers and lines from short circuits and overload conditions while adeptly managing the on/off load current. The drop-out fuse cutout features insulating insulator supports and a fuse tube, with static contacts firmly fixed on either side of the insulator support, and moving contacts at the ends of the fuse tube. The fuse tube boasts an internal arc-extinguishing tube, accompanied by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is augmented with robust elastic auxiliary contacts and an arc-extinguishing enclosure to ensure efficient on-off load current switching.
In regular operational environments, the fuse link secures the fuse tube in a tightened, closed position. When faults arise, the fault current swiftly melts the fuse, resulting in the generation of an electric arc. This ignites the arc-extinguishing tube, which heats up and releases copious amounts of gas, creating high pressure and extending 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, transitioning to an open position. For cutout load switching, 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, which extends within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism expels gas to effectively 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. stands as a beacon of innovation and mastery in the electrifying world of electrical integration. We are a cutting-edge high-tech company, proudly featuring an adept R&D, production, and service team, underpinned by over 15 exhilarating years of industry experience.
Our expansive range of products showcases high-voltage solid-state soft starters, capacitor cabinets, versatile high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and formidable substations. These high-performance marvels serve an array of sectors, from the energy and chemical industries to the realms of metal smelting, sprawling electric power grids, and industrial manufacturing. We also power the esteemed corridors of universities and research institutions, uplift the medical and pharmaceutical industries, support municipal commerce, enhance water conservancy and hydropower initiatives, refine road traffic systems, and elevate both commercial and residential developments.
Anchored in our unwavering commitment to technological innovation and the ethos of "smart manufacturing," we strive to attract elite technical talent, elevating our core competitive strength. We are passionately dedicated to providing extraordinary value to our clients and aspire to establish the most prestigious brand in the industry. From our inception, we've relentlessly marched towards excellence, our path illuminated by innovation and sustained by a modern business ethos. We prioritize quality as our essence, market alignment, reputation-driven growth, and management efficacy as our guiding lights. We adhere to our principles of "technology-led guidance, standardized management, superior quality, and customer satisfaction" in quality and talent management, working diligently to enhance our market prominence. Our mission is to energize China's electric power and grid transmission and distribution sectors with unmatched speed, vigor, and ambition. At our core, integrity is paramount, quality is revered, service is paramount, and customer satisfaction is our eternal mantra. Our steadfast pursuit of excellence, unyielding innovation, and dedication to crafting a trustworthy brand guide us forward. Your recognition fuels our journey. We extend our sincere gratitude to all our loyal clients for their unwavering support. Senhang Technology looks forward to collaborating with you to shape a brilliant 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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