Product Description
General
The drop-out fuse and pull load drop-out fuse are indispensable outdoor high-voltage protective devices, expertly designed to safeguard the integrity of electric systems. Positioned on the high-voltage side of distribution transformers or within distribution lines, these fuses provide indomitable protection against transformer and line short circuits, as well as overloads, while skillfully managing open-circuit load currents. Their durable construction comprises an insulating bracket and fuse tubes; the static contact is firmly anchored at each end of the insulation bracket, with the moving contact strategically located at the fuse tube's endpoints. Ingeniously crafted, the fuse tube features an inner arc tube, protected by an outer phenolic paper tube or an epoxy glass cloth tube. Optimized for exceptional performance, the pull load drop-out fuse is fitted with nimble auxiliary contacts and an arc chute, enhancing its operational versatility, particularly when addressing open or co-load currents.
In routine operations, the drop-out fuse remains securely closed, keeping both the fuse tube and fuse tight. Upon encountering a system fault, the fault current rapidly melts the fuse, generating an arc. The arc's intense heat triggers a release of gas from the arc tube, increasing the pressure within. This incites a vertical airflow along the pipeline, expertly stretching and elongating the arc. The cessation of tension in the moving contact as the fuse blows activates the locking mechanism, releasing the fuse tube and guiding it into the break position. For load pulling operations, an insulating rod is used to detach the moving contact while initially maintaining its connection with the static contact. Consistent pulling with the insulating rod causes the auxiliary contacts to separate, forming and extending an arc within the hood slit. The arc cover's gas facilitates the arc's extinction as the current approaches zero.
Use and Standards
This product stands out with its innovative design, expertly tailored for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It serves as a fortress of protection against overloads and short circuits, adeptly handling the separation and union of rated load currents.
In alignment with exemplary standards, the product model conforms to the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is precisely engineered to meet the rigorous GB15166.3-1994 high voltage fuses expulsion fuses standards. Should standards ambiguously define critical parameters and configurations, meticulous adjustments are made in accordance with JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology.
Drop-out fuse cutouts and load switching fuse cutouts are crucial for outdoor high voltage protection. Seamlessly incorporated into the incoming feeder of distribution transformers or distribution lines, they provide vital defense against short circuits and overloads, efficiently managing on/off loading currents. The drop-out fuse cutout features insulated insulator supports and a fuse tube; static contacts are securely positioned on either side of the insulator support, with moving contacts resting at the terminals of the fuse tube. The complex design 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 resilient elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring proficient management of on-off loading currents.
Under standard operating conditions, the fuse link ensures the fuse tube remains tightly closed. When faults occur, fault currents quickly melt the fuse, creating an electric arc that heats the arc-extinguishing tube, releasing copious gas. This high pressure propels the arc along the tube. Once the fuse link melts, the tension in the moving contact is lost, triggering the mechanism to lock, and the fuse tube drops out, transforming the cutout to an open state. To switch off during cutout loading, operators use an insulating bar to disengage the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but further pulling disengages the auxiliary contacts, creating an electric arc that elongates within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism releases gas, ensuring the arc is extinguished 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. stands as a beacon of unparalleled excellence in the world of electrical integration. As a prestigious high-tech enterprise, we are wholeheartedly committed to innovation, propelled by a distinguished team that excels in R&D, production, and exceptional service. With a legacy of over 15 years of rich experience, we are not just participating in the industry; we are revolutionizing it, setting new benchmarks of excellence and innovation.
Our product range is a dazzling testament to our unwavering commitment to excellence. It features premium high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, and cutting-edge gas-insulated switchgear. We also provide state-of-the-art substations, meticulously tailored to meet the diverse needs of various industries. From dynamic energy and chemical sectors to robust metal smelting and expansive electric power grids, our solutions redefine industry capabilities. Our advanced offerings play an essential role in industrial manufacturing, are revered by universities, embraced by pioneering research entities, and vital to thriving medical and pharmaceutical sectors. Additionally, in municipal commerce, water conservancy and hydropower, road traffic systems, and a vast array of commercial and residential areas, our products are synonymous with unparalleled reliability and efficiency.
At Zhejiang ChaoTai, our unwavering dedication to technological innovation and our forward-thinking 'smart manufacturing' ethos drive us to attract the best technical talent. This empowers us to amplify our core competitiveness, delivering unmatched value to our clients while solidifying our stature as an industry leader. From humble beginnings, we have embarked on an extraordinary path of growth, embracing a contemporary business model that champions quality, market foresight, and efficiency through meticulous management. Our guiding principles are deeply rooted in prioritizing technology, adhering to standardized management, delivering exceptional quality, and ensuring ultimate customer satisfaction. With integrity as our foundation, quality as our strength, and customer satisfaction as our continuous mission, we strive to excel, innovate, and build a brand that commands trust. We extend our heartfelt gratitude to all our esteemed customers for their unwavering support and loyalty. Together with Senhang Technology, we are poised to craft a brighter future, hand in hand!
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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