Product Description
General
The drop-out fuse and pull load drop-out fuse are paramount outdoor high-voltage protective devices, meticulously designed to be the steadfast sentinels of electrical systems. Strategically placed on the high-voltage side of distribution transformers or within distribution lines, these fuses offer robust defense against transformer and line short circuits, as well as overloads, while skillfully managing open-circuit load currents. Constructed with precision, they feature a durable insulating bracket and fuse tubes; the static contact is reliably secured on each end of the insulation bracket, while the moving contact is placed at the fuse tube's extremities. Ingeniously configured, the fuse tube comprises an inner arc tube encased by either an outer phenolic paper tube or an epoxy glass cloth tube. Engineered for operational proficiency, the pull load drop-out fuse is equipped with agile auxiliary contacts and an arc chute, enhancing its operational versatility, especially when managing open or co-load currents.
In standard operations, the drop-out fuse remains securely closed, keeping the fuse tube and fuse taut. When a system fault occurs, the fault current quickly melts the fuse, generating an arc. The arc's intense heat expels gas from the arc tube, increasing the pressure inside. This elevates a vertical airflow along the pipeline, stretching and elongating the arc. As the fuse blows, the moving contact loses tension, activating the locking mechanism, which releases the fuse tube into the breaking position. During load pulling, an insulating rod is used to disengage the moving contact while initially maintaining its link with the static contact. Continued pulling with the insulating rod causes the auxiliary contacts to release, forming and lengthening an arc within the hood slit. The gas from the arc cover facilitates the arc's extinction when the current returns to zero.
Use and Standards
This product excels with an innovative design tailored for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It serves as a stronghold of protection against overloads and short circuits, while adeptly managing the separation and union of rated load currents.
Conforming to exemplary standards, the product model aligns with JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is expertly crafted to meet the rigorous GB15166.3-1994 high voltage fuses expulsion fuses standards. Where standards ambiguously define critical parameters and configurations, precision adjustments are made 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 crucial for outdoor high voltage protection. Seamlessly integrated into the incoming feeder of distribution transformers or distribution lines, they provide essential defense against short circuits and overloads, efficiently managing on/off loading currents. The drop-out fuse cutout includes insulate insulator supports and a fuse tube; static contacts are securely positioned on either side of the insulator support, and moving contacts rest at the ends of the fuse tube. The intricate design of the fuse tube comprises an inner arc-extinguishing tube, surrounded by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout features resilient elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring efficient management of on-off loading currents.
Under normal operating conditions, the fuse link ensures the fuse tube remains securely closed. When faults occur, fault currents rapidly melt the fuse, creating 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 locking mechanism, and the fuse tube drops out, transitioning the cutout to an open state. For cutout loading, operators utilize an insulating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but further pulling detaches the auxiliary contacts, generating 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 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 luminous beacon of excellence within the electrical integration industry. As a prestigious high-tech enterprise, we are passionately committed to groundbreaking innovation, supported by a distinguished team renowned for their expertise in R&D, production, and unparalleled service. With an impressive legacy of over 15 years, we are not merely participants in the industry but are boldly revolutionizing it, setting unprecedented standards of excellence that inspire and lead the way.
Our diverse product range is a shining testament to our unwavering commitment to excellence, featuring premium high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, and cutting-edge gas-insulated switchgear. We also specialize in delivering state-of-the-art substations, meticulously crafted to meet the diverse demands of various industries. From the dynamic energy and chemical sectors to the robust metal smelting industry and expansive electric power grids, our tailored solutions redefine industry capabilities. Our advanced offerings are integral to industrial manufacturing, revered academic institutions, pioneering research entities, as well as the thriving medical and pharmaceutical sectors. In the realms of municipal commerce, water conservancy and hydropower, road traffic systems, and a vast array of commercial and residential areas, our products deliver unmatched reliability and efficiency, setting the benchmark for performance and quality.
At Zhejiang ChaoTai, our unwavering commitment to technological innovation and a forward-thinking 'smart manufacturing' philosophy fuels our ambition to attract and retain the best technical talent. This strategic approach empowers us to significantly enhance our core competitiveness, delivering unparalleled value to our esteemed clients while solidifying our position as a true industry leader. From our humble beginnings, we've embarked on an extraordinary journey of growth and innovation, embracing a contemporary business model built on quality, market foresight, and efficiency through meticulous management. Our ethos is deeply rooted in prioritizing cutting-edge technology, adhering to standardized management practices, delivering exceptional quality, and ensuring absolute customer satisfaction. With integrity as our foundation, quality as our strength, and customer satisfaction as our continuous mission, we aim to excel, innovate, and build a brand that commands trust and respect. Our heartfelt gratitude goes out 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, with a shared vision of innovation and excellence guiding our way forward!
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.
Audited Supplier 
){kind=link}