Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse are the pinnacle of outdoor high-voltage electrical protection, flawlessly engineered to perfection. These devices are strategically placed on the high-voltage side of distribution transformers or serve as pivotal support links within distribution lines. They are vital sentinels against transformer and line short circuits, overload situations, and facilitate effortless current management for opening and loading. With a design epitomizing innovation, the drop-out fuse comprises an insulating bracket and fuse tubes, securely holding static contacts at each end, with elegantly attached moving contacts gracing the ends of the fuse tube. This fuse tube features an advanced inner arc tube, along with a durable outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse is distinguished by its exceptional versatility, boasting auxiliary contacts and a meticulously designed arc chute for seamless current load transitions.
In normal operations, the drop-out fuse remains tightly secured in a closed position, with the fuse tube precisely tensioned. Upon system fault detection, the fault current instantly acts, blowing the fuse and initiating an arc. This robust arc ignites the arc tube, decomposing a substantial volume of gas and crafting high pressure within the tube to forge a vertical wind path that expertly stretches and elongates the arc. As the fuse blows, the moving contact releases, rotating elegantly outward while the locking mechanism disengages, allowing the fuse tube to drop and complete a definitive breaking position. When load pulling is needed, an insulating rod is used to draw out the moving contact while maintaining a link with the static contact. With continued force, auxiliary contacts separate, creating an arc that stretches within the hood slit. The arc cover skillfully contains the gas, facilitating efficient arc extinguishment as the current nears zero.
Applications and Compliance Standards
This distinguished product is expertly crafted for deployment in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It provides steadfast protection against overloads and short circuits while ensuring effective separation and combination of the rated load current.
The precision-engineered design of this product adheres to rigorous standards such as JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters are in harmony with the esteemed GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In scenarios lacking detailed definitions, modifications are 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. Meticulously crafted to connect with the incoming feeder of distribution transformers or lines, they play an essential role in shielding transformers and lines from short circuit incidents and overload conditions while adeptly managing the on/off load current. The drop-out fuse cutout comprises robust insulating supports and a fuse tube, with static contacts strategically fixed on both sides and moving contacts expertly affixed at the ends of the fuse tube. The fuse tube features a sophisticated internal arc-extinguishing tube, paired with 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 scenarios, the fuse link ensures the fuse tube remains firmly closed. Upon encountering faults, the fault current swiftly melts the fuse, generating an electric arc that energizes the arc-extinguishing tube, releasing vast volumes of gas and creating high pressure to elongate the arc within the tube. Once melted, the moving contact loses tension, allowing the mechanism to lock, and the fuse tube to elegantly 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 pulled, an electric arc forms between them, extending within the arc-extinguishing enclosure gap. Simultaneously, 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. emerges as a luminary in the realm of electrical integration, renowned for its cutting-edge innovation and unmatched excellence. As a dynamic high-tech enterprise, we proudly present a seasoned R&D, production, and service team, invigorated by over 15 years of steadfast dedication and industry expertise.
Our diverse product suite encompasses 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 a myriad of sectors, serving the energy and chemical industries, metal smelting operations, extensive electrical power grids, industrial manufacturing, and prestigious universities and research institutions. Additionally, our solutions empower the medical and pharmaceutical fields, bolster municipal commerce, enhance water conservation and hydropower projects, optimize road traffic systems, and elevate commercial and residential developments.
Rooted in a steadfast commitment to technological innovation and the philosophy of 'smart manufacturing,' we are dedicated to attracting elite technical talent to significantly bolster our core competitive edge. Our resolute mission is to deliver unparalleled value to our clients, aspiring to craft the industry's most esteemed brand. Since our inception, we have achieved relentless progress, evolving from humble beginnings to a hallmark of excellence. Our journey is marked by innovation and sustained by a contemporary business ethos, where quality is our lifeblood, market orientation is pivotal, reputation-driven growth is paramount, and efficiency is realized through strategic management. We unwaveringly adhere to the principles of 'technology as the beacon, standardized management, exceptional quality, and customer satisfaction' in our quality and technical talent management, diligently striving to amplify our market footprint. Our mission is to serve China's electric power and grid transmission and distribution sectors with increasing agility, might, and ambition. At our core, integrity is sacrosanct, quality is inviolable, service is sovereign, and customer satisfaction is our eternal creed. Our relentless pursuit of excellence, continuous innovation, and commitment to building a trustworthy brand are our guiding principles. Your recognition fuels our advancement. 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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