Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are the epitome of advanced outdoor high-voltage electrical protection solutions. These indispensable devices are strategically deployed either on the high-voltage side of distribution transformers or as vital components in distribution lines. They provide essential safeguards against transformer and line short circuits, overload conditions, and facilitate the seamless opening and co-loading of current. Ingeniously crafted, the drop-out fuse comprises an insulating bracket and fuse tubes, with static contacts securely affixed at both ends of the bracket and mobile contacts attached to the ends of the fuse tube. The fuse tube features an inner arc tube combined with an outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse elevates operational flexibility with auxiliary contacts and an arc chute, meticulously designed for flawless current load operations.
In typical operational conditions, the drop-out fuse is firmly held in a closed position with the fuse tube under tension. During system malfunctions, the fault current promptly blows the fuse, generating an arc that ignites the arc tube. This dynamic action leads to the decomposition of substantial gas volumes, creating high pressure within the tube, and forming a vertical wind path that efficiently stretches and elongates the arc. Once the fuse has blown, the moving contact releases its tension and rotates outward, while the locking mechanism disengages, allowing the fuse tube to drop and accomplish a breaking position. When load pulling is required, an insulating rod is employed to maneuver the moving contact, ensuring contact with the static contact. Continued effort causes the auxiliary contacts to separate, forming an arc between them that stretches within the hood slit. The gas-enclosing arc cover aids in extinguishing the arc as the current reaches zero.
Use and Standards
This exceptional product is tailored for use in 10 to 35KV distribution lines, including branching lines and on the primary side of distribution transformers. It offers unparalleled protection against overloads and short circuits while enabling the seamless separation and combination of the rated load current.
The product's meticulous design adheres to the JB/T8321-1996 Method for AC high-voltage fuse preparation, with parameters conforming to GB15166.3-1994 high voltage fuses Expulsion fuses standards. In instances where standards lack detailed definitions of crucial parameters and configurations, adjustments are 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 are premier outdoor high-voltage protective devices. These devices are crafted to seamlessly connect with the incoming feeder of distribution transformers or lines, playing an instrumental role in safeguarding transformers and lines from short circuit incidents and overload conditions while adeptly managing the on/off load current. The drop-out fuse cutout comprises robust insulating insulator supports and a fuse tube, with static contacts precisely fixed on both sides of the insulator support and moving contacts installed at the ends of the fuse tube. The fuse tube integrates an internal arc-extinguishing tube along with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also features reinforced elastic auxiliary contacts and an arc-extinguishing enclosure for proficient on-off load current switching.
During normal operational scenarios, the fuse link ensures the fuse tube remains tightened, maintaining a closed position. Fault occurrences cause the fault current to swiftly melt the fuse, generating an electric arc. This process heats the arc-extinguishing tube, releasing a significant volume of gas, creating high pressure, and elongating the arc throughout the tube. Once the fuse link melts, the moving contact loses its tension, allowing the mechanism to lock and the fuse tube to drop out, switching to an open position. For load switching, operators utilize 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 expels gas to extinguish the arc as the current passes through 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 unparalleled excellence in the field of electrical integration. Proudly established as a dynamic high-tech enterprise, we bring forth a powerhouse team proficient in research, development, production, and service, each member enriched with over 15 years of exemplary industry experience.
Our diverse and extensive product portfolio includes high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and reliable substations. These exceptional products serve as the backbone for a wide range of industries, spanning the energy and chemical sectors, metal smelting, expansive electric power grids, industrial manufacturing, and prestigious universities and research institutions. Additionally, our innovative solutions empower the medical and pharmaceutical fields, enhance urban commerce, improve water conservancy and hydropower initiatives, streamline road traffic management, and enrich both commercial and residential developments.
Anchored by a steadfast commitment to technological innovation and the guiding philosophy of "smart manufacturing," we continuously attract top-tier technical talent to elevate our core competitive edge holistically. Our fervent dedication to delivering unmatched value to our clients propels our ambition to become the most esteemed brand in the industry. From our inception, we have made relentless strides toward excellence, driven by an unwavering commitment to innovation and a modern business ethos. This journey is underpinned by quality as our lifeline, market orientation, reputation-driven development, and management-driven efficiency. We unwaveringly adhere to our principles of "technology as the guide, standardized management, exceptional quality, and customer satisfaction" as we diligently bolster our market presence. Our mission is clear: to serve China's electric power and grid transmission and distribution sectors with unmatched speed, strength, and ambition. At our core, integrity is non-negotiable, quality is sacrosanct, service is paramount, and customer satisfaction is our eternal creed. Our relentless pursuit of excellence, unyielding innovation, and dedication to building a trustworthy brand remain our guiding principles. Your recognition fuels our progress. We extend heartfelt gratitude to all our loyal clients for their enduring support and look forward to collaborating with you to forge 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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