Product Description
General
The drop-out fuse and pull load drop-out fuse are indispensable outdoor high-voltage protective devices, meticulously designed to safeguard electric systems. Positioned strategically on the high-voltage side of distribution transformers or within distribution lines, these fuses provide powerful protection against potentially damaging transformer and line short circuits and overloads, while skillfully managing open-circuit load currents. Their design features a robust insulating bracket and fuse tubes; with static contacts securely fastened at each end of the insulation bracket, and moving contacts precisely placed at the fuse tube's extremities. The fuse tube boasts an ingenious configuration, with an inner arc tube elegantly encompassed by an outer phenolic paper tube or an epoxy glass cloth tube. Crafted for operational excellence, the pull load drop-out fuse features nimble auxiliary contacts and an arc chute, enhancing its operational flexibility for managing open or co-load currents.
In routine operations, the drop-out fuse remains steadily closed, maintaining the fuse tube and fuse under tension. Upon the occurrence of a system fault, the ensuing fault current swiftly melts the fuse, producing an intense arc. The arc's formidable heat instigates a vigorous expulsion of gas from the arc tube, elevating the pressure within the tube. This initiates a compelling vertical airflow along the pipeline, adeptly stretching and elongating the arc. As the fuse blows, the tension in the moving contact is released, activating the locking mechanism, which then releases the fuse tube, guiding it into the breaking position. During load pulling, an insulating rod is used to disconnect the moving contact, initially keeping it linked with the static contact. Continued pulling with the insulating rod causes the auxiliary contacts to disengage, forming and extending an arc within the hood slit. The arc cover's gas aids in extinguishing the arc when the current falls to zero.
Use and Standards
This product is a marvel of ingenuity, precisely designed for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It acts as a stalwart guardian against overloads and short circuits, while expertly managing the separation and union of rated load currents.
Upholding the highest standards, the product model conforms to the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is crafted with precision to meet the rigorous GB15166.3-1994 high voltage fuses expulsion fuses standards. In cases where standards ambiguously define critical parameters and configurations, precision adjustments are executed in line 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 fundamental for outdoor high voltage protection. Seamlessly integrated into the incoming feeders of distribution transformers or distribution lines, they deliver vital defense against short circuits and overloads, efficiently managing on/off loading currents. The drop-out fuse cutout is characterized by insulated insulator supports and a fuse tube; static contacts are securely placed on either side of the insulator support, while moving contacts reside at the ends of the fuse tube. The fuse tube's intricate design includes an inner arc-extinguishing tube, enveloped by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is equipped with robust elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring proficient management of on-off loading currents.
Under ideal operating conditions, the fuse link ensures the fuse tube remains securely closed. When faults arise, fault currents rapidly melt the fuse, producing an electric arc that heats the arc-extinguishing tube, releasing abundant gas. This high pressure propels the arc along the tube. Once the fuse link melts, the moving contact loses tension, triggering the mechanism to lock, and the fuse tube drops out, transitioning the cutout to an open state. To switch off during cutout loading, operators use an insulating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but continued pulling disengages the auxiliary contacts, creating an electric arc that elongates within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism releases gas, ensuring the arc is extinguished as the current hits 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 excellence in the world of electrical integration. Renowned as a prestigious high-tech enterprise, we are passionately committed to relentless innovation. Our endeavors are fortified by a distinguished team excelling in R&D, production, and service. With over 15 years of invaluable experience, we are not merely participating in the industry; we are revolutionizing it, setting unparalleled standards of excellence.
Our diverse product range is a true testament to our unwavering commitment to excellence. It features a superior selection of high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, and pioneering gas-insulated switchgear. We proudly deliver state-of-the-art substations meticulously designed to cater to diverse industry needs. Serving dynamic sectors such as energy, chemical, metal smelting, and expansive power grids, our solutions redefine industry capabilities. Our advanced offerings are also pivotal to industrial manufacturing, esteemed universities, pioneering research institutions, and the flourishing medical and pharmaceutical sectors. In municipal commerce, water conservancy, hydropower, road traffic systems, and a myriad of commercial and residential applications, our products deliver exceptional reliability and efficiency.
At Zhejiang ChaoTai, our unwavering dedication to technological innovation and a forward-looking 'smart manufacturing' philosophy propels us to attract top-tier technical talent. This empowers us to enhance our core competitiveness and deliver unmatched value to our clients, solidifying our stature as an industry leader. From humble beginnings, we have embarked on an extraordinary journey of growth, embracing a contemporary business model founded on quality, market foresight, and efficiency through meticulous management. Our ethos is deeply rooted in prioritizing technology, adhering to standardized management, delivering superior quality, and ensuring customer satisfaction. With integrity as our foundation, quality as our strength, and unwavering customer satisfaction as our mission, we strive to excel and innovate, building a brand synonymous with 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 forge 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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