Product Description
General
The drop-out fuse and pull load drop-out fuse are essential outdoor high-voltage protective devices, meticulously designed to safeguard electrical systems. When strategically installed on the high-voltage side of distribution transformers or along distribution lines, these fuses provide robust protection against transformer and line short circuits and overloads, while efficiently overseeing open-circuit load currents. Their durable construction comprises an insulating bracket and fuse tubes, with static contacts firmly anchored at each end of the insulation bracket and moving contacts positioned at the extremities of the fuse tube. Ingeniously crafted, the fuse tube features an inner arc tube enveloped by an outer phenolic paper tube or an epoxy glass cloth tube. With a focus on operational excellence, the pull load drop-out fuse is further enhanced with flexible auxiliary contacts and an arc chute, boosting its operational agility, especially when handling open or co-load currents.
In everyday operations, the drop-out fuse remains closed, keeping the fuse tube and fuse intact. When a system fault occurs, the fault current swiftly melts the fuse, generating an arc. The intense heat from the arc causes a release of gas from the arc tube, increasing the pressure within. This initiates a vertical airflow along the pipeline, effectively stretching and lengthening the arc. As the fuse blows, the tension in the moving contact is lost, activating the locking mechanism, which then releases the fuse tube, transitioning it into the breaking position. For load pulling, an insulating rod is used to disengage the moving contact, maintaining its connection with the static contact initially. Continued pulling with the insulating rod causes the auxiliary contacts to detach, forming and extending an arc within the hood slit. The gas from the arc cover assists in extinguishing the arc when the current approaches zero.
Use and Standards
This product stands out with a cutting-edge design specifically tailored for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It serves as a stalwart protector against overloads and short circuits, while adeptly handling the separation and union of rated load currents.
Upholding the highest standards, the product model aligns with the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is meticulously crafted to comply with the rigorous GB15166.3-1994 high voltage fuses expulsion fuses standards. In cases where standards may ambiguously define critical parameters and configurations, precise 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 indispensable for outdoor high voltage protection. Seamlessly incorporated into the incoming feeder of distribution transformers or distribution lines, they provide crucial defense against short circuits and overloads, proficiently managing on/off loading currents. The drop-out fuse cutout features insulate insulator supports and a fuse tube, with static contacts securely positioned on either side of the insulator support and moving contacts resting at the ends of the fuse tube. The sophisticated design of the fuse tube includes an inner arc-extinguishing tube, encapsulated by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout boasts robust elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring adept management of on-off loading currents.
Under standard operating conditions, the fuse link ensures the secure closure of the fuse tube. When faults arise, fault currents rapidly melt the fuse, forming an electric arc that heats the arc-extinguishing tube, releasing a significant amount of gas. This elevated pressure drives the arc along the tube. Once the fuse link melts, the tension in the moving contact is lost, triggering the locking mechanism, and the fuse tube drops out, transitioning the cutout to an open state. To switch off during 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 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 shining beacon of excellence in the dynamic sphere of electrical integration. As a prestigious high-tech enterprise, we are deeply committed to driving innovation, supported by a distinguished team excelling in research and development, production, and comprehensive service. With a legacy spanning over 15 years, we are not just participants but pioneers, revolutionizing the industry and setting unmatched standards of excellence.
Our product range is a true testament to our unwavering commitment to excellence; it showcases premium high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, and cutting-edge gas-insulated switchgear. We also offer state-of-the-art substations, meticulously tailored to meet the diverse needs of numerous industries. From the dynamic energy and chemical sectors to the robust metal smelting and expansive electric power grids, our innovative solutions redefine industry capabilities. Our advanced offerings are integral to industrial manufacturing, esteemed universities, pioneering research entities, and thriving medical and pharmaceutical sectors alike. In municipal commerce, water conservancy and hydropower, road traffic systems, and a vast array of commercial and residential areas, our products deliver reliability and efficiency that are truly unmatched.
At Zhejiang ChaoTai, our unwavering commitment to technological innovation, paired with a forward-thinking 'smart manufacturing' philosophy, drives us to consistently attract top-tier technical talent. This empowerment enhances our core competitiveness, allowing us to deliver unparalleled value to our esteemed clients while fortifying our standing as an industry leader. From our humble beginnings, we have embarked on an extraordinary journey of growth, embracing a modern business model that is built on quality, market foresight, and efficiency through meticulous management. Our ethos is deeply rooted in prioritizing technology, adhering to standardized management processes, delivering exceptional quality, and ensuring complete customer satisfaction. With integrity as our foundation, quality as our strength, and customer satisfaction as our unwavering mission, we strive to excel, innovate, and build a brand that commands trust. Our heartfelt gratitude extends to all our valued customers for their steadfast support and loyalty. Together with Senhang Technology, we are poised to craft a brighter, more prosperous 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.
Audited Supplier 
){kind=link}