Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage electrical protection technology. These cutting-edge devices are crucial for installation on the high-voltage side of distribution transformers and as key components in distribution lines. They are expertly designed to shield against transformer and line short circuits and overloads, while also allowing for smooth opening and co-loading of currents. The drop-out fuse is a marvel of engineering, constructed with a sturdy insulating bracket and innovative fuse tubes. The static contacts are securely positioned at both ends of the bracket, while the moving contacts are artfully attached to the fuse tube ends. The fuse tube itself is a sophisticated assembly, featuring an inner arc tube with an outer layer made of either phenolic paper or epoxy glass cloth. The Pull Load Drop-out Fuse further enhances operational flexibility, incorporating auxiliary contacts and an expertly designed arc chute to ensure seamless current load operations.
Under regular operating conditions, the drop-out fuse is held in a closed position, with the fuse tube meticulously tensioned. In the event of a system fault, the fault current rapidly causes the fuse to blow, creating an arc that ignites the arc tube. This ignites a large amount of gas, generating high pressure that forms a vertical wind path, stretching and elongating the arc with remarkable speed. When the fuse blows, the moving contact releases its tension, rotating outward and allowing the fuse tube to drop into a breaking position as the locking mechanism disengages. For load operations, an insulating rod is used to manipulate the moving contact, keeping it engaged with the static contact. With further pulling, the auxiliary contacts separate, creating an arc that elongates within the hood slit. The arc cover, filled with gas, facilitates swift arc extinguishment as the current reaches zero, ensuring safe and efficient operation.
Use and Standards
This exceptional product is specifically engineered for application in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It provides unrivaled protection against overloads and short circuits, while efficiently handling the separation and combination of the rated load current.
The product's meticulous design is in strict conformity with the JB/T8321-1996 Method for AC high-voltage fuse preparation, and the product parameters align seamlessly with GB15166.3-1994 high voltage fuses Expulsion fuses standards. In instances where standards do not thoroughly define critical parameters and configurations, adjustments are made in accordance with 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 stand as premier solutions for high-voltage outdoor protection. Expertly crafted to connect with the incoming feeder of distribution transformers or lines, they play a vital role in defending transformers and lines against short circuit events and overloads, while seamlessly managing on/off load currents. The drop-out fuse cutout features robust insulating insulator supports and a sophisticated fuse tube. Static contacts are precisely fixed on both sides of the insulator support, and moving contacts are installed at the fuse tube's ends. This ingenious design incorporates an internal arc-extinguishing tube, paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout further enhances functionality with reinforced elastic auxiliary contacts and an arc-extinguishing enclosure, delivering exceptional efficiency in on-off load current switching.
In standard operational scenarios, the fuse link ensures the fuse tube is tightly secured in a closed position. When faults arise, the fault current swiftly melts the fuse, forming an electric arc. This arc heats up the arc-extinguishing tube, releasing a vast amount of gas, which generates high pressure and stretches the arc throughout the tube. After the fuse link has melted, the moving contact loses its tension, allowing the mechanism to lock and the fuse tube to drop, switching to an open position. For load switching during cutout, operators utilize an insulating operating bar to pull the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the operator continues, an electric arc forms between the auxiliary contacts, elongating within the arc-extinguishing enclosure gap. The arc-extinguishing mechanism expertly expels gas to extinguish the arc as the current passes through zero, ensuring optimal safety and reliability.
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. represents the zenith of innovation and distinction in electrical integration. As a vibrant high-tech enterprise, we are equipped with an experienced R&D, production, and service team, enriched by over 15 years of dedicated industry expertise. Our commitment to excellence drives us to continuously break new ground in the field.
Our comprehensive product range features high-voltage solid-state soft starters, capacitor cabinets, both high and low voltage switchgear, innovative gas-insulated switchgear, and durable substations. These high-efficiency products are crucial to numerous sectors, including the energy and chemical industries, metal smelting, expansive electric power grids, industrial manufacturing, as well as renowned universities and research institutions. Furthermore, our cutting-edge solutions empower the medical and pharmaceutical industries, support municipal commerce, enhance water conservancy and hydropower projects, streamline road traffic systems, and enrich commercial and residential developments with unparalleled precision and reliability.
Anchored by an unwavering commitment to technological innovation, and guided by the philosophy of "smart manufacturing," we strive to attract top-tier technical talent to comprehensively enhance our company's core competitive advantage. Our fervent dedication to delivering unmatched value to our clients propels us to aspire to become the industry's most distinguished brand. Since our establishment, we have made relentless progress, journeying from initiation to excellence. Our path is paved by our commitment to innovation, sustained by a modern business ethos that emphasizes quality as our lifeline, market orientation, reputation-driven development, and management-driven efficiency. We unwaveringly uphold our commitment to "technology as the guide, standardized management, exceptional quality, and customer satisfaction" as guiding principles in quality and technical talent management, diligently working to strengthen our market presence. Our mission is to serve China's electric power, grid transmission, and distribution fields with ever-increasing speed, strength, and ambition. At our core, integrity is steadfast, quality is inviolable, service is paramount, and customer satisfaction remains our eternal creed. Our relentless pursuit of excellence, continuous innovation, and dedication to fostering a trustworthy brand are our guiding principles. Your recognition fuels our progress. We extend heartfelt gratitude to all our loyal clients for their enduring support, and Senhang Technology eagerly anticipates collaborating with you to build 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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