Product Description
General
The drop-out fuse and pull load drop-out fuse are indispensable outdoor high-voltage protective devices, meticulously engineered to safeguard electrical infrastructures. They are typically positioned either at the high-voltage side of distribution transformers or strategically integrated into distribution lines. Their primary function is to offer robust protection against transformer and line short circuits, as well as overloads, while adeptly managing the open-circuit load currents. These fuses are comprised of an insulating bracket and fuse tubes; the static contact is securely fastened to both ends of the insulation bracket, whereas the moving contact is affixed to the fuse tube ends. The fuse tube is intricately designed with an inner arc tube, skillfully enveloped by a durable outer phenolic paper tube or an epoxy glass cloth tube. The pull load drop-out fuse is optimally equipped with flexible auxiliary contacts and an arc chute, which significantly enhances operational flexibility during open-circuit and co-load current scenarios.
Under typical operational conditions, the drop-out fuse remains securely in a closed position, with the fuse tube and fuse maintained under optimal tension. In the event of a system failure, the rapid surge of fault current melts the fuse, creating a powerful arc. The arc tube, subjected to the arc's intense heat, expels large volumes of gas, generating elevated pressure within the tube. This pressure induces a vertical airflow along the pipeline, effectively stretching and elongating the arc. As the fuse blows, the moving contact loses its tension, activating the locking mechanism, which releases the fuse tube, transitioning it to the breaking position. In scenarios requiring load disconnection, an insulating rod is utilized to disengage the moving contact, while initially maintaining contact with the static contact. Continued pulling with the insulating rod results in the separation of the auxiliary contacts, causing an arc to form and elongate within the hood slit. The gas within the arc cover plays a crucial role in extinguishing the arc precisely when the current reaches zero.
Use and Standards
Ingeniously crafted for deployment in 10 ~ 35KV distribution lines, branching lines, and the primary side of distribution transformers, this product offers unparalleled protection against overloads and short circuits. It is adept at handling the separation and combination of rated load currents, ensuring seamless operation across various applications.
The product model is meticulously aligned with the JB/T8321-1996 Method for type AC high-voltage fuses preparation, adhering strictly to the GB15166.3-1994 high voltage fuses expulsion fuses standards. Where standard specifications leave room for interpretation, the product is fine-tuned according to the JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology guidance, ensuring precision and reliability.
Drop-out fuse cutouts and load switching fuse cutouts are critically important outdoor high voltage protective devices. Seamlessly integrated with the incoming feeder of distribution transformers or distribution lines, these devices provide essential protection against short circuits and overloads while managing on/off loading currents with precision. The drop-out fuse cutout is constructed with insulate insulator supports and a fuse tube; static contacts are firmly secured on both sides of the insulator support, with moving contacts installed at the fuse tube ends. The fuse tube's design features an inner arc-extinguishing tube, enveloped by an outer phenolic compound paper tube or an epoxy glass tube, ensuring robust performance. The load switching fuse cutout is equipped with enforced elastic auxiliary contacts and an arc-extinguishing enclosure to expertly manage on-off loading current scenarios.
Under typical working conditions, the fuse link keeps the fuse tube secured in a closed position. In the event of system faults, the fault current swiftly melts the fuse, producing an electric arc that heats the arc-extinguishing tube, releasing significant gas volumes, which in turn create high pressure to propel the arc along the tube. Upon the melting of the fuse link, the moving contact loses tension, engaging the locking mechanism, and the fuse tube drops out to transition the cutout to an open position. During cutout loading disconnection, operators utilize 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 efficiently releases gas to extinguish the arc as the current passes through zero, ensuring a safe and 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. epitomizes excellence in electrical integration as a prestigious, high-tech enterprise. With a distinguished team leading R&D, production, and service initiatives, we draw on over 15 years of profound industry experience to drive innovation and achieve unparalleled success. Our commitment to excellence ensures that we remain at the forefront of industry advancements.
Our product portfolio is truly exceptional, featuring an array of cutting-edge solutions including high-voltage solid-state soft starters, capacitor cabinets, sophisticated high and low voltage switchgear, advanced gas-insulated switchgear, and state-of-the-art substations. Our solutions cater to a wide spectrum of industries, including the dynamic energy and chemical sectors, robust metal smelting operations, expansive electric power grids, and the forefront of industrial manufacturing. Additionally, our expertise extends to esteemed universities, pioneering research institutions, thriving medical and pharmaceutical sectors, as well as municipal commerce. We serve crucial areas such as water conservancy and hydropower, road traffic systems, and a diverse range of commercial and residential locales, reinforcing our position as a leading force in electrical systems.
Driven by a relentless pursuit of technological innovation and a visionary 'smart manufacturing' philosophy, we are committed to attracting top-tier technical talent. This enhances our core competitiveness, allowing us to deliver unmatched value to our clients while establishing our brand as an industry leader. Since inception, we have embarked on a remarkable growth trajectory, evolving from modest beginnings to achieving industry excellence. Our ethos of innovation is anchored in a contemporary business model that leverages quality for survival, market focus for growth, reputation for development, and efficiency through meticulous management. Our pledge is to prioritize technology as our guiding star, adhere to standardized management practices, deliver superior quality, and ensure absolute customer satisfaction. This fortifies our market presence and propels us to ambitious heights in serving China's electric power and grid sectors. Integrity is our foundation, quality is our strength, service is our hallmark, and customer satisfaction is our enduring ethos. We are devoted to the pursuit of excellence, continuous innovation, and crafting a brand that inspires trust and confidence. Your recognition fuels our journey, and we extend our heartfelt gratitude to our valued customers for their unwavering support and loyalty. Together with Senhang Technology, we look forward to forging a brighter future, hand in hand, and ushering in a new era of innovation and success!
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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