Product Description
General
The drop-out fuse and pull load drop-out fuse are indispensable outdoor high-voltage protective devices, providing critical defense for electrical systems. They are typically positioned on the high-voltage side of distribution transformers or act as essential links in distribution lines. These fuses offer comprehensive protection against transformer and line short circuits, overloads, and effectively manage open-circuit load currents. Their construction features an insulating bracket and fuse tubes. The static contact is securely attached to both ends of the insulation bracket, while the moving contact is mounted at the ends of the fuse tube. The fuse tube is meticulously crafted with an inner arc tube wrapped by an outer phenolic paper tube or an epoxy glass cloth tube. The pull load drop-out fuse is enhanced with flexible auxiliary contacts and an arc chute, which enhance operational flexibility when engaging open or co-load currents.
During standard operations, the drop-out fuse is maintained in a closed state, with the fuse tube and fuse under tension. In the event of a system failure, the fault current swiftly melts the fuse, generating an arc. The arc tube, subjected to the arc's intense heat, releases significant gas volumes, forming a high-pressure environment within the tube. This action results in a vertical wind along the pipeline, effectively stretching and elongating the arc. When the fuse blows, the moving contact loses its tension, triggering the locking mechanism and releasing the fuse tube, which drops into the breaking position. To disconnect the load, an insulating rod is utilized to disengage the moving contact while maintaining initial contact with the static contact. Continued pulling of the insulating rod separates the auxiliary contacts, with an arc forming and elongating within the hood slit. Gas within the arc cover assists in extinguishing the arc when the current reaches zero.
Use and Standards
Crafted with expertise, this product is tailored for application in 10 ~ 35KV distribution lines, branching lines, and the primary side of distribution transformers. It stands out with its exemplary protection against overloads and short circuits, while adeptly managing the separation and combination of rated load currents.
The model of this product aligns with the JB/T8321-1996 Method for preparing type AC high-voltage fuses. It meets the rigorous standards of the GB15166.3-1994 high voltage fuses expulsion fuses. Where standards leave key parameters and configurations ambiguous, corrections are made following the JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology.
Drop-out fuse cutouts and load switching fuse cutouts are vital outdoor high voltage protective devices. They seamlessly integrate with the incoming feeder of distribution transformers or distribution lines, offering essential protection against short circuits and overloads, while adeptly managing on/off loading currents. The drop-out fuse cutout consists of insulate insulator supports and a fuse tube, with static contacts firmly secured on both sides of the insulator support and moving contacts installed at the ends of the fuse tube. The architecture of the fuse tube includes an inner arc-extinguishing tube, enveloped by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout boasts enforced elastic auxiliary contacts and an arc-extinguishing enclosure to proficiently manage on-off loading current.
Under normal working conditions, the fuse link ensures the fuse tube is firmly secured in a closed position. When system faults occur, the fault current quickly melts the fuse, producing an electric arc that heats the arc-extinguishing tube and releases substantial gas, creating high pressure that propels the arc along the tube. Upon the melting of the fuse link, the moving contact loses its tension, the mechanism locks, and the fuse tube drops out, transitioning the cutout to an open position. To switch off during cutout loading, operators use an insulating operating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but further pulling disengages the auxiliary contacts, generating an electric arc that elongates within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism releases 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. is an illustrious leader in electrical integration, renowned as a prestigious high-tech enterprise. With an exceptional team in research, development, production, and service, we harness over 15 years of rich experience to drive innovation and excellence across the industry landscape.
Our portfolio is a testament to innovation, featuring a remarkable range of products including high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, pioneering gas-insulated switchgear, and cutting-edge substations. Our innovative solutions seamlessly integrate into various sectors such as the dynamic energy and chemical industries, robust metal smelting, expansive electric power grids, and trailblazing industrial manufacturing. We extend our expertise to esteemed universities, forward-thinking research institutions, the thriving medical and pharmaceutical sectors, as well as municipal commerce. Additionally, we are pivotal in water conservancy and hydropower sectors, road traffic systems, and cater to a broad spectrum of commercial and residential domains.
Driven by an unwavering commitment to technological innovation and a visionary 'smart manufacturing' philosophy, we are devoted to attracting top-tier technical talent. This strategic focus sharpens our core competitiveness, empowering us to deliver unparalleled value to our clients and aiming to catapult our brand to the forefront of the industry. From our inception, we have embarked on an extraordinary growth trajectory, evolving from modest beginnings to achieving industry excellence. Our guiding principles are rooted in innovation, following a contemporary business model that relies on quality for survival, market-focus for growth, reputation for development, and efficiency through meticulous management practices. We pledge to prioritize technology as our guiding principle, adhere to standardized management systems, deliver superior quality, and ensure customer delight. This robust foundation fortifies our market presence and propels us to set ambitious goals in serving China's electric power and grid sectors. Integrity is our bedrock, quality is our strength, service is our hallmark, and customer satisfaction is our enduring ethos. Our steadfast objectives are the relentless pursuit of excellence, continuous innovation, and crafting a brand that commands trust. Your recognition propels our journey, and we extend our profound gratitude to all our esteemed customers for their steadfast support and loyalty. Together, with Senhang Technology, we eagerly anticipate forging a brighter future, collaboratively!
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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