Product Description
General
The drop-out fuse and pull load drop-out fuse are indispensable outdoor high-voltage protective devices pivotal to the safety of electrical systems. Strategically installed on the high-voltage side of distribution transformers or as an integral component within distribution lines, these fuses deliver robust protection against transformer and line short circuits, overloads, and facilitate the seamless management of open-circuit load currents. Crafted with a sophisticated design comprising an insulating bracket and fuse tubes, the static contact is securely attached to both ends of the insulation bracket, while the moving contact is precisely mounted on the fuse tube ends. The fuse tube is ingeniously constructed from an inner arc-extinguishing tube enveloped by an outer phenolic paper tube or an epoxy glass cloth tube. The pull load drop-out fuse is specially equipped with flexible auxiliary contacts and an arc chute, significantly enhancing operational flexibility and efficiency when handling open or co-load currents.
During standard operation, the drop-out fuse remains steadfastly in a closed position, with the fuse tube and fuse firmly under tension. In the event of a system anomaly, the fault current rapidly melts the fuse, igniting an electric arc. This arc heats the arc-extinguishing tube, generating copious amounts of gas, which in turn creates high pressure within the tube. This phenomenon results in a vertical wind effect along the pipeline, effectively stretching and elongating the arc for efficient extinguishment. Upon the fuse's activation, the moving contact is relieved of tension, triggering the locking mechanism to release the fuse tube, which gracefully transitions to the breaking position. To manage load pulling, an insulating rod is expertly employed to disengage the moving contact, initially maintaining contact with the static contact. Continued pulling with the insulating rod facilitates the separation of the auxiliary contacts, with an arc forming and elongating within the hood slit. The gas emitted within the arc cover plays a crucial role in extinguishing the arc as the current reaches zero, ensuring seamless operational continuity and safety.
Use and Standards
This product is engineered with precision for application within 10 ~ 35KV distribution lines, branching lines, and on the primary side of distribution transformers. It offers exceptional protection against overloads and short circuits, while adeptly managing the separation and combination of rated load currents, ensuring operational efficiency and reliability.
This product model is meticulously developed in alignment with the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It adheres to the stringent requirements of the GB15166.3-1994 high voltage fuses expulsion fuses standards. In scenarios where standards present ambiguity in defining key parameters and configurations, necessary adjustments are made in accordance with JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology, ensuring compliance and superior performance.
Drop-out fuse cutouts and load switching fuse cutouts stand as essential outdoor high voltage protective devices. Seamlessly integrated with the incoming feeder of distribution transformers or distribution lines, these devices provide indispensable protection against short circuits and overloads, adeptly managing on/off loading currents. The drop-out fuse cutout consists of insulate insulator supports and a fuse tube, with static contacts meticulously secured on both sides of the insulator support and moving contacts deftly installed at the fuse tube ends. The fuse tube’s architecture features an inner arc-extinguishing tube enveloped by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is equipped with enforced elastic auxiliary contacts and an arc-extinguishing enclosure, proficiently managing on-off loading currents with precision and reliability.
Under optimal working conditions, the fuse link ensures that the fuse tube is securely fastened in a closed position. When system faults arise, the fault current rapidly melts the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing substantial gas that creates high pressure to swiftly blow the arc along the tube. As the fuse link melts, the moving contact loses tension, triggering the locking mechanism, and allowing the fuse tube to drop out, effectively transitioning the cutout to an open position. To switch off during cutout loading, operators expertly utilize an insulating operating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but further pulling disengages the auxiliary contacts, generating an electric arc that elongates within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism releases gas to extinguish the arc as the current passes zero, ensuring safe and efficient 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. is a trailblazer in electrical integration, proudly recognized as a prestigious high-tech enterprise. Backed by an illustrious team in research and development, production, and service, we harness over 15 years of profound expertise to set new standards and achieve excellence in the industry.
Our product suite is truly unparalleled, featuring high-voltage solid-state soft starters, sophisticated capacitor cabinets, both high and low voltage switchgear, innovative gas-insulated switchgear, and cutting-edge substations. Our solutions are pivotal across a wide array of sectors, such as the vibrant energy and chemical industries, robust metal smelting, extensive electric power grids, and pioneering industrial manufacturing. Our influence spans into prestigious universities, avant-garde research institutions, the burgeoning medical and pharmaceutical industries, and municipal commerce. Moreover, our proficiency extends to the vital water conservancy and hydropower sectors, comprehensive road traffic systems, and a diverse range of commercial and residential areas.
Driven by an unwavering pursuit of technological advancement and a forward-thinking 'smart manufacturing' philosophy, we pledge to attract top-tier technical talent. This dedication bolsters our core strengths, empowering us to deliver unmatched value to our clients as we strive to position our brand as an industry leader. Since our inception, we have embarked on a stellar growth trajectory, evolving from modest origins to a pinnacle of industry success. Our core principles revolve around innovation, adhering to a modern business framework that emphasizes quality for survival, market focus for expansion, reputation for development, and efficiency through precise management. Our steadfast promise is to hold technology as our guiding star, adhere to standardized management practices, produce exemplary quality, and ensure customer delight. This commitment fortifies our market stature and drives us to serve China's electric power and grid sectors with ambitious aspirations. Integrity is our cornerstone, quality is our strength, service is our hallmark, and customer satisfaction is our enduring mission. Our unwavering objectives are the pursuit of excellence, relentless innovation, and the creation of a brand that earns unwavering trust. Your recognition propels our journey, and we express our deepest gratitude to all our valued 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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