Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse stand as paragons of outdoor high-voltage electrical protection. Expertly designed, these devices are ingeniously positioned on the high-voltage side of distribution transformers or serve as essential support links in distribution lines. They play a critical role in shielding transformers and lines from short circuits, overload interruptions, and ensure the smooth interruption and connection of current flow. Ingeniously crafted, the drop-out fuse consists of an insulating bracket and fuse tubes, with static contacts firmly anchored at each end and moving contacts elegantly integrated with the ends of the fuse tube. The construction of the fuse tube showcases a sophisticated inner arc-extinguishing tube complemented by a resilient outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse is distinguished by its advanced flexibility, featuring auxiliary contacts and an arc chute precisely engineered for seamless current load operations.
In regular operation, the drop-out fuse is firmly held in a closed state, with the fuse tube expertly tensioned. Upon detecting system irregularities, the fault current promptly reacts, blowing the fuse and forming an arc. This dynamic arc activates the arc tube, generating a substantial volume of gas and heightened pressure inside the tube to form a vertical wind path that efficiently stretches and prolongs the arc's duration. Once the fuse is blown, the moving contact releases, elegantly rotating outward while the locking mechanism disengages, allowing the fuse tube to drop and secure a decisive breaking position. For load operations, an insulating rod extracts the moving contact while maintaining a connection with the static contact. With continued force application, auxiliary contacts part, generating an arc between them that stretches within the hood slit. The arc cover adeptly retains the gas, promoting efficient arc extinguishment as the current reaches zero.
Applications and Compliance Standards
This exceptional product is meticulously crafted for application in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It offers unwavering protection against overloads and short circuits, while enabling effective separation and combination of the rated load current.
The precision-engineered design of this product adheres to the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters are in perfect alignment with the esteemed GB15166.3-1994 standards for high voltage fuses, particularly Expulsion fuses. In instances where detailed definitions are scarce, modifications are devised in compliance 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 represent premier outdoor high-voltage protective solutions. Strategically crafted to connect with the incoming feeder of distribution transformers or lines, they are pivotal in shielding transformers and lines from potential short circuit events and overload conditions, while expertly managing the on/off load current. The drop-out fuse cutout features resilient insulating insulator supports and a fuse tube, with static contacts securely positioned on both sides and moving contacts expertly affixed at the fuse tube ends. The fuse tube incorporates a sophisticated internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also boasts enhanced, elastic auxiliary contacts and an arc-extinguishing enclosure for efficient on-off load current switching.
In typical operational scenarios, the fuse link ensures the fuse tube remains securely closed. Upon encountering faults, the fault current swiftly melts the fuse, generating an electric arc that activates the arc-extinguishing tube, releasing substantial volumes of gas and creating heightened pressure to elongate the arc within the tube. Post-melting, the moving contact loses tension, allowing the mechanism to lock and the fuse tube to drop out, transitioning to an open position. For cutout load switching, operators utilize an insulating operating bar to extract the moving contact. Initially, the main contact is connected with the auxiliary static contact. As the auxiliary contact is further pulled, an electric arc forms between them, elongating within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to effectively extinguish the arc as the current passes through 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.: The Pinnacle of Innovation and Excellence in Electrical Integration Welcome to a world where groundbreaking innovation meets unparalleled excellence. Zhejiang ChaoTai Complete Equipment Co., Ltd. stands as a beacon of cutting-edge progress in the realm of electrical integration. As a dynamic high-tech enterprise, we boast a team of highly experienced professionals in R&D, production, and service, driven by a legacy of over 15 years of unwavering dedication and expertise. Our journey is deeply rooted in a commitment to advancing electrical technology with innovation at its core.
Our Extensive Product Range: Transforming Industries At Zhejiang ChaoTai, our expansive product range is a testament to our commitment to quality and innovation. We proudly offer high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and resilient substations. These exceptional products are vital across numerous sectors, offering unmatched reliability and efficiency. Our solutions empower the energy and chemical industries, enhance metal smelting operations, support vast electrical power grids, and bolster industrial manufacturing. Moreover, prestigious universities and research institutions benefit from our advanced technology. Our dedication extends to energizing the medical and pharmaceutical fields, bolstering municipal commerce, advancing water conservation and hydropower projects, optimizing road traffic systems, and elevating commercial and residential developments. Zhejiang ChaoTai is committed to driving progress and transforming industries.
Driving Technological Innovation and Excellence Rooted in a steadfast commitment to technological innovation and the ethos of 'smart manufacturing,' Zhejiang ChaoTai is dedicated to attracting top-tier technical talent to enhance our core competitive advantage. Our mission is to deliver unparalleled value to our clients, striving to establish the industry's most esteemed brand. From our inception, we have been on a relentless journey from conception to excellence. Innovation is the foundation of our growth, supported by a modern business ethos where quality is our lifeline, market orientation is paramount, reputation-driven growth is essential, and strategic management ensures efficiency. We adhere to guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction,' diligently expanding our market footprint. Our mission is to empower China's electric power and grid transmission and distribution sectors with increasing speed and strength. Integrity is at our core, quality is our hallmark, service is king, and customer satisfaction is our enduring commitment. Our pursuit of excellence, continuous innovation, and dedication to building a reliable brand guide us forward. Your recognition fuels our journey. We extend heartfelt gratitude to our loyal clients for their unwavering support, as Senhang Technology eagerly looks forward to partnering with you in crafting 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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