Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse embody the pinnacle of outdoor high-voltage electrical protection, crafted for superior precision and reliability. These advanced devices are meticulously positioned on the high-voltage side of distribution transformers or as integral support links along distribution lines. They function as crucial defenses against transformer and line short circuits, overload scenarios, and enable seamless current operations. Ingeniously designed, the drop-out fuse integrates an insulating bracket with fuse tubes, featuring static contacts securely anchored at each end, while moving contacts are elegantly affixed to the ends of the fuse tube. The fuse tube's construction is a testament to sophistication, boasting an intricate inner arc tube paired with a resilient outer phenolic paper tube or epoxy glass cloth tube. Meanwhile, the Pull Load Drop-out Fuse offers flexibility par excellence, spotlighting auxiliary contacts and a meticulously crafted arc chute to ensure smooth and efficient current load operations.
In typical operations, the drop-out fuse remains firmly secured in a closed configuration with the fuse tube expertly tensioned. When system faults are detected, the fault current acts with swiftness, causing the fuse to blow and generate an arc. This formidable arc ignites the arc tube, disintegrating large gas volumes and generating significant pressure within the tube to craft a vertical wind path that skillfully stretches and elongates the arc. As the fuse blows, the moving contact is released, rotating gracefully outward, while the lock disengages, allowing the fuse tube to descend and reach a definitive breaking position. When load pulling is necessary, an insulating rod is utilized to draw out the moving contact while maintaining a connection with the static contact. With continued application of force, auxiliary contacts separate, creating an arc that extends within the hood slit. The arc cover skillfully contains the gas, facilitating efficient arc extinguishment as the current reaches zero.
Applications and Compliance Standards
This exemplary product is designed with meticulous attention to detail, intended for use in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It provides 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 is in strict adherence to the rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters are aligned with the esteemed GB15166.3-1994 standards for high voltage expulsion fuses. In scenarios lacking detailed definitions, adjustments are crafted in accordance with the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses, ensuring utmost reliability and safety.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are the epitome of premier outdoor high-voltage protective devices. Deliberately crafted for strategic connection with the incoming feeder of distribution transformers or lines, they play an indispensable role in safeguarding transformers and lines from short circuit incidents and overload conditions. They skillfully manage on/off load current operations. The drop-out fuse cutout comprises robust insulating insulator supports with a fuse tube, featuring static contacts securely fixed on both sides and moving contacts expertly installed at the ends of the fuse tube. The fuse tube is a marvel of engineering, boasting a sophisticated internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout further includes elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring efficient load current switching.
In standard operational scenarios, the fuse link ensures the fuse tube remains tightly closed. Upon encountering faults, the fault current swiftly melts the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing substantial gas volumes and creating high pressure to elongate the arc within the tube. After the fuse link melts, the moving contact loses tension, enabling the mechanism to lock and the fuse tube to drop out, transitioning to an open position. For cutout load switching, operators employ an insulating operating bar to pull the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact is pulled further, an electric arc forms between them, elongating within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to efficiently extinguish the arc as the current zero-crosses, ensuring 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. emerges as a shining exemplar of pioneering innovation and unmatched excellence in the realm of electrical integration. As a dynamic high-tech enterprise, we take immense pride in presenting a seasoned R&D, production, and service team, fortified by over 15 years of steadfast dedication and profound expertise in the industry.
Our vast array of products includes high-voltage solid-state soft starters, advanced capacitor cabinets, both high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These superior products are crucial across a multitude of industries, supporting the energy and chemical sectors, metal smelting activities, extensive electrical power networks, industrial manufacturing, as well as esteemed universities and research institutions. Moreover, our solutions invigorate the medical and pharmaceutical domains, bolster municipal commerce, enhance water conservation and hydropower ventures, optimize road traffic systems, and elevate both commercial and residential developments.
Rooted in a steadfast commitment to technological advancement and our 'smart manufacturing' ethos, we are determined to attract elite technical talent, thereby enhancing our fundamental competitive edge. Our unwavering focus is on delivering unparalleled value to our clients, aiming to establish the most esteemed brand in the industry. Since our inception, we have made strenuous strides, progressing from nascent beginnings to excellence. Our journey is driven by innovation and sustained by a modern business ethos, where quality is our lifeblood, market orientation is crucial, growth based on reputation is imperative, and efficiency is achieved through strategic management. We resolutely 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 striving to amplify 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 sacrosanct, quality is inviolable, service reigns supreme, and customer satisfaction is our timeless commitment. Our relentless pursuit of excellence, unceasing innovation, and dedication to building a reliable brand are our guiding tenets. Your recognition fuels our progress. We extend our heartfelt appreciation to all our loyal clients for their unwavering support, and Senhang Technology eagerly anticipates partnering 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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