Product Description
General
The drop-out fuse and pull-load drop-out fuse are critical outdoor high-voltage protective devices, expertly designed to shield electrical systems. These are strategically placed on the high-voltage side of distribution transformers or integrated into distribution lines, ensuring robust protection against transformer and line short circuits, as well as overloads. They also facilitate open-circuit load currents. The sophisticated construction includes an insulating bracket and fuse tubes, with static contacts firmly established at both ends of the insulation bracket and moving contacts affixed to the fuse tube ends. The fuse tube, a marvel of engineering, consists of an inner arc tube cleverly encased by an outer phenolic paper tube or an epoxy glass cloth tube. The pull-load drop-out fuse is further enhanced with flexible auxiliary contacts and an arc chute, significantly refining operational efficiency, especially when opening or co-load currents are involved.
In typical operation, the drop-out fuse remains steadfastly closed, keeping the fuse tube and fuse under uniform tension. When a system issue arises, the fault current swiftly melts the fuse, sparking an arc. The arc tube, subjected to the arc's intense heat, unleashes a torrent of gas, raising the pressure inside the tube and causing a vertical wind through the pipeline that expertly stretches and elongates the arc. Once the fuse blows, the moving contact loses its tension, triggering a precise locking mechanism that releases the fuse tube into a breaking position. For load pulling, an insulating rod is skillfully used to disengage the moving contact, which initially remains in contact with the static contact. Persistent pulling with the insulating rod separates the auxiliary contacts, with an arc forming and elegantly elongating within the hood slit. The gas inside the arc cover expertly facilitates arc extinguishment once the current reaches zero.
Use and Standards
This product is masterfully crafted for use in 10 ~ 35KV distribution lines, branching lines, and the primary side of distribution transformers. It delivers outstanding protection against overloads and short circuits while skillfully managing the separation and combination of rated load currents.
The product model strictly adheres to the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is meticulously engineered to comply with the GB15166.3-1994 high voltage fuses expulsion fuses standards. In cases where standards ambiguously define key parameters and configurations, adjustments are made precisely 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 essential high voltage protective devices designed for outdoor use. They are seamlessly integrated at the incoming feeder of distribution transformers or distribution lines, providing unmatched protection against short circuits and overloads, while adeptly managing on/off loading currents. The drop-out fuse cutout is composed of insulate insulator supports and a fuse tube, with static contacts reliably secured on both sides of the insulator support and moving contacts expertly mounted at the fuse tube ends. The fuse tube's architecture is ingeniously designed with an inner arc-extinguishing tube enveloped by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout features robust elastic auxiliary contacts and an arc-extinguishing enclosure, skillfully managing on-off loading current.
Under normal operational conditions, the fuse link ensures the fuse tube is staunchly secured in a closed position. Upon the occurrence of system faults, the fault current swiftly melts the fuse, creating an electric arc that heats the arc-extinguishing tube which then releases a significant amount of gas, generating high pressure that expertly propels the arc along the tube. Once the fuse link melts, the moving contact loses its tension, causing the mechanism to lock, and the fuse tube drops out, transitioning the cutout to a fully open position. To switch off during cutout loading, operators use an insulating operating bar to proficiently pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but further pulling seamlessly disengages the auxiliary contacts, creating an electric arc that elongates within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism releases gas to effectively 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. is a leading force in electrical integration, renowned as a distinguished high-tech enterprise. With an elite team dedicated to research, development, production, and service, we harness over 15 years of extensive expertise to drive innovation and achieve excellence within the industry.
Our product offerings are truly exceptional, featuring high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, advanced gas-insulated switchgear, and state-of-the-art substations. Our cutting-edge solutions are indispensable across a vast array of sectors, including the dynamic realms of energy and chemicals, robust metal smelting processes, expansive electric power grids, and trailblazing industrial manufacturing. We are proud to extend our innovative solutions to prestigious universities, pioneering research institutions, the thriving medical and pharmaceutical fields, as well as municipal commerce. In addition, our profound expertise serves the vital water conservancy and hydropower sectors, comprehensive road traffic systems, and a wide array of commercial and residential areas.
Driven by a relentless quest for technological advancement and guided by an inspired 'smart manufacturing' philosophy, we are committed to attracting top-tier technical talent. This strategic focus bolsters our core competitiveness, allowing us to deliver unmatched value to our clients while aspiring to establish our brand leadership in the industry. Since our inception, we have embarked on an extraordinary journey, ascending from modest origins to achieving industry preeminence. Our ethos is deeply rooted in innovation, following a modern business model that thrives on quality as a pillar for survival, market orientation as a catalyst for growth, reputation as a cornerstone for development, and efficiency through meticulous management. We pledge to prioritize technology as our guiding beacon, adhere to standardized management practices, deliver supreme quality, and ensure customer satisfaction. This commitment amplifies our market presence and propels our ambition to serve China's electric power and grid sectors with aspirational goals. Integrity forms our foundation, quality is our strength, service is our signature, and customer satisfaction is our enduring ethos. We steadfastly pursue excellence, continuous innovation, and aspire to forge a brand synonymous with trust. Your recognition fuels our journey, and we express our heartfelt gratitude to all our esteemed customers for their unwavering support and loyalty. Together with Senhang Technology, we anticipate creating a brighter future, united in progress!
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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