Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are unrivaled solutions crafted for the protection of outdoor high-voltage electrical systems. These sophisticated devices are masterfully positioned on the high-voltage side of distribution transformers or as indispensable support links in distribution lines. They are essential for safeguarding against transformer and line short circuits, handling overload conditions, and facilitating effective opening and co-loading of current. Ingeniously designed, the drop-out fuse features an insulating bracket and fuse tubes, with fixed static contacts at both ends of the bracket and mobile contacts at the ends of the fuse tube. The fuse tube's construction is nothing short of impressive, featuring an inner arc tube complemented by either an outer phenolic paper tube or an epoxy glass cloth tube. The Pull Load Drop-out Fuse is distinguished by its enhanced flexibility, equipped with auxiliary contacts and an arc chute, purposefully engineered for smooth current load operations.
In the course of standard operations, the drop-out fuse is impeccably maintained in a closed position with the fuse tube under tension. When a system malfunction occurs, the fault current acts swiftly to blow the fuse, producing an arc. This arc activates the arc tube, leading to the decomposition of substantial gas volumes, creating high pressure inside the tube, and forming a vertical wind path. This extraordinary process rapidly extends and lengthens the arc. After the fuse blows, the mobile contact releases its tension, rotating outward, while the locking mechanism disengages, allowing the fuse tube to drop and reach a breaking position. When the moment arrives to pull the load, an insulating rod is used to draw the moving contact, ensuring continuous contact with the static contact. With persistent effort, the auxiliary contacts part, generating an arc between them, which is then stretched within the protective hood slit. The arc cover, filled with gas, aids in extinguishing the arc as the current reaches zero.
Use and Standards
This exceptional product is purpose-built for deployment in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It provides formidable protection against overloads and short circuits while enabling the efficient and seamless separation and combination of the rated load current.
The meticulous and exacting design of this product aligns with the JB/T8321-1996 Method for AC high-voltage fuse preparation, while ensuring that all product parameters adhere to GB15166.3-1994 high voltage fuses Expulsion fuses standards. In instances where standards lack precise definitions of crucial parameters and configurations, modifications are adeptly made following the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout represent the pinnacle of outdoor high-voltage protective devices. Engineered to connect seamlessly with the incoming feeder of distribution transformers or lines, they play a pivotal role in shielding transformers and lines from potential short circuit incidents and overload conditions, while expertly managing the on/off load current. The drop-out fuse cutout features insulating insulator supports and a fuse tube, with static contacts securely set on both sides of the insulator support and moving contacts installed at the ends of the fuse tube. The fuse tube includes an internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout further enhances functionality with reinforced elastic auxiliary contacts and an arc-extinguishing enclosure for proficient on-off load current switching.
In routine operational scenarios, the fuse link ensures the fuse tube is meticulously tightened to maintain a steadfast closed position. Upon encountering faults, the fault current acts quickly, melting the fuse and generating a powerful electric arc. This event causes the arc-extinguishing tube to heat significantly, releasing a substantial volume of gas, which creates high pressure and extends the arc throughout the tube. After the fuse link melts, the moving contact loses its tension, enabling the mechanism to lock and the fuse tube to drop out, transitioning to an open position. For load switching during cutout, operators must employ an insulating operating bar to pull the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact is further pulled, an electric arc forms between the auxiliary contacts, which elongates within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism dispels gas to extinguish the arc 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 innovation and mastery in the field of electrical integration. With a dynamic approach as a high-tech enterprise, we proudly present a team of seasoned experts in R&D, production, and service, enriched with over 15 years of dedicated industry experience.
Our extensive product range showcases high-voltage solid-state soft starters, capacitor cabinets, and both high and low voltage switchgear. We offer cutting-edge gas-insulated switchgear and robust substations. These high-performance products serve diverse sectors, including the energy and chemical industries, metal smelting, expansive electric power grids, and industrial manufacturing. Our solutions are pivotal to esteemed universities, research institutions, and the medical and pharmaceutical sectors. They bolster municipal commerce, enhance water conservancy and hydropower projects, optimize road traffic systems, and enrich commercial and residential developments.
With an unwavering commitment to technological innovation and a philosophy rooted in 'smart manufacturing,' we strive to attract top-tier technical talent, elevating our company's core competitive edge. We are passionately committed to delivering unmatched value to our clients, aspiring to create the most esteemed brand within the industry. Since our inception, we have made relentless strides from the ground up, guided by a commitment to innovation. Our path is sustained by a modern business ethos, where quality is our lifeline, market orientation fuels us, reputation-driven development propels us, and management-driven efficiency defines us. We firmly uphold 'technology as our guide, standardized management, exceptional quality, and customer satisfaction' as our guiding tenets in quality and technical talent management. Our mission is to serve China's electric power and grid transmission and distribution sectors with speed, strength, and ambition. Integrity is non-negotiable, quality is sacrosanct, service reigns supreme, and customer satisfaction is our eternal creed. We relentlessly pursue excellence, fostering innovation and building a trustworthy brand. Your recognition fuels our progress. Our heartfelt gratitude goes to all our loyal clients for their enduring support. Zhejiang Chaotai eagerly anticipates collaborating with you to create a brighter future together.
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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