Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage electrical protection solutions. With strategic placement on the high-voltage side of distribution transformers or as indispensable links in distribution lines, these devices act as vital shields against transformer and line short circuits and overload conditions. They are engineered for precision in facilitating the opening and co-loading of current. Crafted with an insulating bracket and fuse tubes, static contacts are securely affixed at each end of the bracket, while moving contacts are precisely attached to the ends of the fuse tube. The fuse tube's construction features an expertly designed inner arc tube and a robust outer phenolic paper or epoxy glass cloth tube. Meanwhile, the Pull Load Drop-out Fuse is equipped with advanced auxiliary contacts and an arc chute, offering unmatched flexibility for seamless current load operations.
In regular operation, the drop-out fuse is steadfastly held in a closed position, maintaining the tension of the fuse tube. Upon encountering a system fault, the fault current rapidly blows the fuse, sparking an arc. This arc activates the arc tube, leading to the decomposition of large volumes of gas and creating high internal pressure, which generates a vertical wind path. This intricate mechanism effectively stretches and elongates the arc. Post fuse-blow, the moving contact loses tension and rotates outward as the locking mechanism unlocks, allowing the fuse tube to drop and reach a breaking position. When load pulling is required, an insulating rod strategically pulls the moving contact while maintaining contact with the static contact. With continued effort, auxiliary contacts separate, creating an arc stretched within the hood slit. The arc cover, containing gas, aids in arc extinguishment precisely as the current reaches zero.
Use and Standards
This exceptional product is meticulously tailored for use in 10 to 35KV distribution lines, covering branching lines and the primary side of distribution transformers. It provides formidable protection against overloads and short circuits, ensuring the efficient separation and combination of the rated load current with ease and reliability.
This product's precision engineering follows the JB/T8321-1996 Method for AC high-voltage fuse preparation. It meets the rigorous parameters set by GB15166.3-1994 high voltage fuses Expulsion fuses standards. In scenarios where standards lack definitive parameters, adjustments are guided by the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses, ensuring adaptability and compliance.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are leading outdoor high-voltage protective devices. Connecting seamlessly with incoming feeders of distribution transformers or lines, they provide crucial protection against short circuit incidents and overload conditions while adeptly managing the on/off load current. The drop-out fuse cutout features insulating insulator supports and a sophisticated fuse tube, with static contacts fixed firmly on both sides and moving contacts at the ends of the fuse tube. The fuse tube integrates an internal arc-extinguishing tube alongside an outer phenolic compound paper or epoxy glass tube. Additionally, the load switching fuse cutout is enhanced with resilient auxiliary contacts and an arc-extinguishing enclosure, ensuring efficient on-off load current switching.
Under normal conditions, the fuse link ensures the fuse tube remains tightened in a closed position. When faults arise, the fault current swiftly melts the fuse, generating an electric arc. This heats the arc-extinguishing tube, releasing substantial gas volumes, creating high pressure, and effectively elongating the arc within the tube. Following the fuse link melt, the moving contact's tension releases, the mechanism locks, and the fuse tube drops out, transitioning to an open position. For load switching during cutout, operators use an insulating operating bar to pull the moving contact. Initially, engagement is maintained with the auxiliary static contact. As further pulling ensues, an electric arc forms between the auxiliary contacts, stretching within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism discharges gas to extinguish the arc precisely as the current crosses 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 excellence in the field of electrical integration. As a vibrant high-tech enterprise, we offer an experienced R&D, production, and service team, enriched with over 15 years of dedicated industry expertise, ensuring cutting-edge solutions and remarkable service delivery.
Our comprehensive product portfolio includes high-voltage solid-state soft starters, capacitor cabinets, both high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and robust substations. These high-performance products play a pivotal role in various sectors, such as energy, chemical industries, metal smelting, extensive electric power grids, industrial manufacturing, and esteemed universities. Moreover, our tailored solutions empower medical and pharmaceutical sectors, bolster municipal commerce, enhance water conservancy and hydropower initiatives, optimize road traffic systems, and enrich commercial and residential developments.
Firmly rooted in a commitment to technological innovation and the philosophy of "smart manufacturing," we are devoted to attracting top-tier technical talent to holistically enhance our company's core competitive advantage. We tirelessly strive to deliver unparalleled client value and aspire to forge the industry's most esteemed brand. Since our inception, we have relentlessly advanced, transitioning from inception to excellence. Our journey is marked by unwavering innovation and a modern business ethos, emphasizing quality as our lifeline, market orientation, reputation-driven development, and management-driven efficiency. We uphold "technology as the guide, standardized management, exceptional quality, and customer satisfaction" as our guiding principles in quality and technical talent management, diligently enhancing our market presence. Our mission is to serve China's electric power and grid transmission and distribution fields with growing speed, strength, and ambition. At our core, integrity is non-negotiable, quality is paramount, service reigns supreme, and customer satisfaction is our eternal creed. Our relentless pursuit of excellence, unwavering innovation, and commitment to building a trustworthy brand remain our guiding pillars. Your recognition fuels our progress, and we sincerely thank all our loyal clients for their enduring support. Senhang Technology eagerly anticipates 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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