Product Description
General
The drop-out fuse and pull load drop-out fuse are quintessential outdoor high-voltage protective devices designed to shield electrical systems with unmatched reliability. Strategically installed on the high-voltage side of distribution transformers or as critical links within distribution lines, these fuses are paramount in delivering robust protection against transformer and line short circuits, mitigating overloads, and facilitating seamless open-circuit load currents. Constructed with a durable insulating bracket and fuse tubes, the static contact is meticulously affixed to both ends of the insulation bracket, while the moving contact is expertly mounted on the fuse tube ends. The fuse tube itself boasts a sophisticated design, with an inner arc tube enveloped by an outer phenolic paper tube or a resilient epoxy glass cloth tube. The pull load drop-out fuse is ingeniously equipped with flexible auxiliary contacts and a state-of-the-art arc chute, significantly enhancing operational flexibility during opening or co-load current events.
In normal operation, the drop-out fuse maintains a closed position, with the fuse tube and fuse held securely under tension. Upon system failure, the fault current swiftly melts the fuse, generating a potent arc. The arc tube, exposed to the intense heat of the arc, releases a substantial volume of gas, creating a high-pressure environment within the tube. This results in a vertical wind along the pipeline, effectively stretching and elongating the arc. When the fuse blows, the moving contact loses tension, triggering the precision-engineered locking mechanism, which releases the fuse tube, allowing it to drop into the breaking position. To facilitate load pulling, an insulating rod is used to disengage the moving contact while initially maintaining contact with the static contact. Continued pulling with the insulating rod results in the separation of auxiliary contacts, with an arc forming and elongating within the hood slit. The gas within the arc cover plays a crucial role in extinguishing the arc as the current reaches zero, ensuring safe and efficient operation.
Use and Standards
This product is meticulously crafted for application in 10 ~ 35KV distribution lines, branching lines, and the primary side of distribution transformers. It delivers outstanding protection against overloads and short circuits, while demonstrating exceptional capability in handling the separation and combination of rated load currents with unparalleled precision.
The product model strictly adheres to the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is engineered to meet the rigorous GB15166.3-1994 high voltage fuses expulsion fuses standards. In instances where standards ambiguously define key parameters and configurations, precise corrections are implemented in accordance with JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology, ensuring the highest level of compliance and reliability.
Drop-out fuse cutouts and load switching fuse cutouts are indispensable outdoor high voltage protective devices. Seamlessly integrated with the incoming feeder of distribution transformers or distribution lines, they provide vital 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 securely mounted on both sides of the insulator support and moving contacts expertly installed at the fuse tube ends. The fuse tube's architecture is ingeniously crafted, featuring an inner arc-extinguishing tube enveloped by an outer phenolic compound paper tube or a robust epoxy glass tube. The load switching fuse cutout boasts enforced elastic auxiliary contacts and an arc-extinguishing enclosure, expertly designed to manage on-off loading current with precision and efficacy.
Under normal working conditions, the fuse link ensures that the fuse tube is firmly secured in a closed position. When system faults occur, the fault current rapidly melts the fuse, producing an electric arc that heats the arc-extinguishing tube and releases significant gas, creating high pressure that propels the arc along the tube. Once the fuse link melts, the moving contact loses its tension, the mechanism locks, and the fuse tube drops out, transitioning the cutout to an open position. To switch off during cutout loading, operators utilize an insulating operating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but further pulling successfully disengages the auxiliary contacts, generating an electric arc that elongates within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism releases gas to effectively extinguish the arc as the current passes zero, ensuring top-tier safety and operational integrity.
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 beacon of innovation and excellence in the realm of electrical integration. As a prestigious high-tech enterprise, we proudly harness a wealth of over 15 years of industry expertise. Our distinguished team specializing in R&D, production, and service is at the heart of our operations, driving forward with a commitment to innovate and excel.
Our impressive suite of products is tailored to meet the demanding needs of modern industries. We offer an exceptional range, from high-voltage solid-state soft starters and capacitor cabinets to both high and low voltage switchgear, innovative gas-insulated switchgear, and cutting-edge substations. Our solutions are integral to various sectors such as dynamic energy, chemical industries, and the robust metal smelting field. We are pivotal in expansive electric power grids and advanced industrial manufacturing. Our influence extends into the esteemed circles of universities and pioneering research institutions, while we also make significant contributions to the medical and pharmaceutical sectors. In addition, our expertise is indispensable to municipal commerce, the vital water conservancy and hydropower sectors, as well as road traffic systems. We cater to a broad spectrum of commercial and residential areas with precision and dedication.
Driven by an unwavering commitment to technological advancement and a visionary 'smart manufacturing' philosophy, we are devoted to drawing high-caliber technical talent. This dedication bolsters our core competitiveness, allowing us to deliver exceptional value to our clients. We are steadfast in our pursuit to position our brand as an industry leader. Our extraordinary journey from humble beginnings to industry prominence is marked by a relentless focus on innovation. Our modern business model is founded on quality as a means of survival, market-centric growth strategies, reputation as a development tool, and efficiency through precise management. Our promise is to prioritize technology, embrace standardized management, provide exceptional quality, and ensure customer satisfaction. This commitment fortifies our market presence and propels us to serve the electric power and grid sectors of China with ambitious aspirations. Our integrity stands as our foundation, quality as our strength, service as our hallmark, and customer satisfaction as our constant ethos. We relentlessly pursue excellence, continuous innovation, and the creation of a brand that evokes trust. Your recognition inspires our journey, and we extend our deepest gratitude to all our esteemed customers for their steadfast support and loyalty. Together with Senhang Technology, we look forward to forging 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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