Product Description
General
The drop-out fuse and pull load drop-out fuse represent indispensable outdoor high-voltage protective devices, masterfully crafted to serve as stalwart guardians of your electric systems. Strategically positioned on the high-voltage side of distribution transformers or within distribution lines, these fuses provide formidable protection against transformer and line short circuits, as well as overloads. Moreover, they excel in managing open-circuit load currents with precision. Their robust and reliable construction features an insulating bracket and fuse tubes; the static contact is securely affixed on each end of the insulation bracket, while the moving contact is expertly positioned at the fuse tube's extremities. The fuse tube is ingeniously designed with an inner arc tube surrounded by an outer phenolic paper tube or an epoxy glass cloth tube. Designed for operational excellence, the pull load drop-out fuse is equipped with agile auxiliary contacts and an arc chute, enhancing its operational flexibility, especially when dealing with open or co-load currents.
In routine operations, the drop-out fuse remains closed, maintaining the fuse tube and fuse tension. When a system fault occurs, the fault current quickly melts the fuse, creating an arc. The intense heat from the arc causes a burst of gas from the arc tube, increasing the internal pressure. This initiates a vertical airflow along the pipeline, skillfully stretching and elongating the arc. As the fuse blows, the loss of tension in the moving contact activates the locking mechanism, which releases the fuse tube and guides it into the breaking position. For load pulling, an insulating rod is used to disengage the moving contact, initially keeping it connected with the static contact. Continued pulling with the insulating rod causes the auxiliary contacts to detach, forming and elongating an arc within the hood slit. The arc cover's gas helps extinguish the arc when the current reaches zero, ensuring safety and reliability.
Use and Standards
This product stands out with its ingenious design, perfectly tailored for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It acts as a bastion of protection against overloads and short circuits, while adeptly managing the separation and union of rated load currents. Its remarkable design ensures optimal performance and reliability, making it an essential component for modern electrical systems.
Adhering to the highest standards of quality and precision, the product model aligns with the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is meticulously engineered to meet the stringent GB15166.3-1994 high voltage fuses expulsion fuses standards. In scenarios where standards ambiguously define crucial parameters and configurations, precision adjustments are made in compliance with JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology, ensuring exceptional performance and durability.
Drop-out fuse cutouts and load switching fuse cutouts are crucial for robust 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 features insulate insulator supports and a fuse tube; static contacts are securely placed on either side of the insulator support, with 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 proficient management of on-off loading currents, thereby delivering reliable and effective protection.
Under standard operating conditions, the fuse link ensures that the fuse tube remains securely closed. When faults occur, fault currents rapidly melt the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing a significant amount of gas. This high pressure propels the arc along the tube. Once the fuse link melts, the moving contact loses tension, activating 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 stay engaged, but further pulling disengages 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 hits zero, safeguarding the system and ensuring optimal 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. stands as a beacon of excellence within the realm of electrical integration. As a prestigious high-tech enterprise, we are thoroughly committed to pioneering innovation, backed by our distinguished team that excels in research and development, production, and service excellence. With over 15 years of rich experience, we are revolutionizing the industry, setting unprecedented standards of excellence that others aspire to follow.
Our expansive product range is a testament to our unwavering commitment to excellence. We feature premium high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, along with cutting-edge gas-insulated switchgear. Additionally, we provide state-of-the-art substations, each tailored to meet the diverse needs across industries. Our solutions redefine capabilities for the dynamic energy and chemical sectors, robust metal smelting operations, and expansive electric power grids. Our advanced offerings are also integral to industrial manufacturing, esteemed universities, pioneering research entities, and thriving medical and pharmaceutical sectors. In the domains of municipal commerce, water conservancy and hydropower, road traffic systems, and a broad spectrum of commercial and residential areas, our products deliver unmatched reliability and efficiency.
At Zhejiang ChaoTai, our unwavering commitment to technological innovation and a forward-thinking 'smart manufacturing' philosophy propels us to attract the industry's finest technical talent. This empowers us to enhance our core competitiveness and deliver unparalleled value to our clients, solidifying our stature as an industry leader. From humble beginnings, we've embarked on an extraordinary journey of growth, embracing a contemporary business model rooted in quality, market foresight, and efficiency through meticulous management. Our ethos is grounded in prioritizing technology, adhering to standardized management, delivering exceptional quality, and ensuring customer satisfaction. With integrity as our foundation, quality as our strength, and customer satisfaction as our continuous mission, we aspire 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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