Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage electrical safeguards. Meticulously engineered, these devices serve as essential guardians on the high-voltage side of distribution transformers or as key supportive links in distribution lines. They are indispensable in protecting against transformer and line short circuits, handling overloads, and ensuring smooth current transition during operation. The drop-out fuse boasts an insulating bracket and robust fuse tubes, with static contacts firmly placed at each end and moving contacts seamlessly integrated into the ends of the fuse tube. The fuse tube showcases a sophisticated inner arc tube, combined with a resilient outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse distinguishes itself with superior adaptability, featuring auxiliary contacts and a precisely engineered arc chute for streamlined current handling.
In typical operations, the drop-out fuse is securely locked in its closed state, with the fuse tube perfectly tensioned. When system faults occur, the fault current acts rapidly, blowing the fuse and creating a dynamic arc. This arc ignites the arc tube, decomposing significant gas volumes and generating high pressure within the tube, forming a vertical wind path that skillfully elongates the arc. As the fuse blows, the moving contact is gently released, rotating outward with grace while the locking mechanism disengages, allowing the fuse tube to descend and achieve a decisive open position. For load pulling, an insulating rod is employed to withdraw the moving contact while maintaining its connection to the static contact. As force is applied, auxiliary contacts separate, creating an arc between them that stretches within the hood slit. The arc cover expertly contains the gas, facilitating effective arc extinguishment as the current reaches zero.
Applications and Compliance Standards
This prestigious product is astutely designed for 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 efficient separation and combination of rated load current.
The finely crafted design of this product complies with the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation standards. Its specifications align with the esteemed GB15166.3-1994 standards for high voltage expulsion fuses. In cases where detailed definitions are absent, modifications are crafted 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 embody excellence as premier outdoor high-voltage protective devices. Thoughtfully designed to connect with the incoming feeder of distribution transformers or lines, they play an essential role in safeguarding transformers and lines from short circuits and overload incidents, while efficiently managing the on/off load current. The drop-out fuse cutout consists of robust insulating insulator supports and a fuse tube, with static contacts solidly positioned on both sides and moving contacts skillfully installed at the ends of the fuse tube. The fuse tube features an advanced internal arc-extinguishing tube, combined with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout includes adaptable, elastic auxiliary contacts and an arc-extinguishing enclosure for efficient on-off load current management.
In normal operational scenarios, the fuse link ensures the fuse tube remains tightly secured. Upon encountering faults, the fault current swiftly melts the fuse, creating an electric arc that heats the arc-extinguishing tube, releasing substantial gas volumes to generate high pressure and elongate the arc within the tube. After melting, the moving contact loses its 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 pull the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As further force is applied, an electric arc forms between them, elongating within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas, efficiently quenching 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. emerges as a leader in the realm of electrical integration, renowned for its cutting-edge innovation and exceptional quality. As a dynamic high-tech enterprise, we proudly present a seasoned team of R&D, production, and service experts, boasting more than 15 years of steadfast dedication and industry expertise.
Our extensive product lineup includes high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These premium products are vital across diverse sectors, empowering the energy and chemical industries, metal smelting ventures, expansive electrical power grids, industrial manufacturing, and esteemed universities and research institutions. Moreover, our solutions invigorate the medical and pharmaceutical domains, support municipal commerce, advance water conservation and hydropower projects, optimize road traffic systems, and enhance commercial and residential developments.
Rooted in a staunch commitment to technological advancement and the ideology of 'smart manufacturing,' we focus on attracting elite technical talent to significantly bolster our core competitive edge. Our unwavering goal is to deliver unparalleled value to our clients and aspire to establish the industry's most esteemed brand. From our founding, we have pursued relentless progress, evolving from inception to excellence. Our journey is marked by innovation and sustained by a contemporary business ethos, where quality is our lifeline, market orientation is essential, reputation-driven growth is vital, and efficiency is achieved through strategic management. We loyally adhere to our guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in quality and technical talent management, diligently working to expand our market footprint. 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 paramount, service is sovereign, and customer satisfaction is our enduring commitment. Our relentless pursuit of excellence, continual innovation, and dedication to building a trustworthy brand remain our guiding standards. Your recognition fuels our progress. We extend our sincerest gratitude to all our loyal clients for their unwavering support, and Senhang Technology eagerly looks forward to partnering with you to craft 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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