Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse are pinnacle solutions in outdoor high-voltage electrical protection. Masterfully designed, these devices are strategically placed on the high-voltage side of distribution transformers or within distribution lines, serving as pivotal defenses against transformer and line short circuits and overloads, while ensuring precise current control for opening and loading. Showcasing a design that embodies cutting-edge innovation, the drop-out fuse features an insulating bracket and fuse tubes, with static contacts firmly secured at each end, and elegantly attached moving contacts at the ends of the fuse tube. The fuse tube is equipped with an advanced inner arc tube, complemented by a sturdy outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse stands out with its remarkable adaptability, incorporating auxiliary contacts and a meticulously designed arc chute for seamless current load transitions.
In normal conditions, the drop-out fuse remains steadfastly closed, with the fuse tube precisely tensioned. Upon detecting system faults, the fault current rapidly blows the fuse, birthing an arc. This vigorous arc triggers the arc tube, decomposing a substantial volume of gas and generating high pressure within the tube to craft a vertical wind path that adeptly stretches and elongates the arc. As the fuse blows, the moving contact is released, elegantly rotating outward while the locking mechanism disengages, allowing the fuse tube to drop and reach a decisive breaking point. For load pulling, an insulating rod is employed to draw out the moving contact while maintaining connection with the static contact. With continued force application, auxiliary contacts separate, forming an arc that stretches within the hood slit. The arc cover skillfully contains the gas, facilitating efficient arc extinguishment as the current approaches zero.
Applications and Compliance Standards
This exceptional product is impeccably designed for application in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It delivers steadfast protection against overloading and short-circuit incidents, ensuring effective separation and combination of the rated load current.
Crafted with precision, this product's design complies with the rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters harmonize with the esteemed GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In cases where detailed definitions are absent, adjustments are finely tailored 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 represent the zenith of high-performance outdoor high-voltage protective devices. Thoughtfully crafted to connect with the incoming feeder of distribution transformers or lines, they play a vital role in shielding transformers and lines from short circuit and overload scenarios, while seamlessly managing the on/off load current. The drop-out fuse cutout features robust insulating supports and a fuse tube, with static contacts strategically positioned on both sides and moving contacts expertly attached at the ends of the fuse tube. The fuse tube is designed with an advanced internal arc-extinguishing tube, complemented by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also includes high-performance, elastic auxiliary contacts and an arc-extinguishing enclosure for efficient on-off load current switching.
In typical operational contexts, the fuse link ensures the fuse tube remains tightly closed. When faced with 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 high pressure to elongate the arc within the tube. Once melted, tension is lost from the moving contact, enabling the mechanism to lock, and the fuse tube to gracefully drop out, transitioning to an open position. For cutout load switching, operators skillfully utilize an insulating operating bar to draw the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact is further drawn, an electric arc forms between them, extending within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism expels gas to efficiently 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. stands as a beacon of groundbreaking innovation and unparalleled excellence within the dynamic realm of electrical integration. This vibrant high-tech enterprise boasts a highly experienced R&D, production, and service team, empowered by over 15 years of unwavering dedication and expertise in the industry. With a commitment to excellence and innovation, ChaoTai is at the forefront of electrifying advancements.
Our expansive and dynamic product range features high-voltage solid-state soft starters, sophisticated capacitor cabinets, both high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and resilient substations. These high-caliber products are indispensable across an impressive array of sectors, serving the energy and chemical industries, metal smelting operations, vast electrical power grids, industrial manufacturing, and prestigious universities and research institutions. Furthermore, our solutions power the medical and pharmaceutical fields, support municipal commerce, enhance water conservation and hydropower projects, optimize road traffic systems, and elevate commercial and residential developments. Our high-quality offerings guarantee reliability and excellence, empowering industries to thrive.
Anchored in a firm commitment to technological innovation and the philosophy of 'smart manufacturing,' we are resolute in attracting top-tier technical talent to comprehensively enhance our core competitive advantage. Our unwavering dedication lies in delivering unmatched value to our clients, aspiring to create the industry's most revered brand. From our inception, we have made relentless progress, evolving from inception to excellence. Our journey is paved with innovation and sustained by a modern business ethos, where quality is our lifeline, market orientation is key, reputation-driven growth is paramount, and efficiency is realized through strategic management. We steadfastly adhere to the guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and technical talent management, diligently working to expand our market presence. Our mission is to serve China's electric power and grid transmission and distribution sectors with increasing speed, strength, and ambition. At our core, integrity is non-negotiable, quality is inviolable, service is sovereign, and customer satisfaction is our perennial creed. Our relentless pursuit of excellence, constant innovation, and commitment to building a trustworthy brand remain our guiding principles. Your recognition propels our progress. We extend our heartfelt gratitude to all our loyal clients for their enduring support, and Senhang Technology eagerly anticipates partnering with you to shape 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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