Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse stand as the pinnacle of outdoor high-voltage electrical defense. Masterfully crafted, these devices are strategically installed at the high-voltage side of distribution transformers or as vital segments within distribution lines. They are indispensable guardians against transformer and line short circuits, overloads, and facilitate precise current management for opening and loading. With a design that radiates cutting-edge innovation, the drop-out fuse comprises an insulating bracket and fuse tubes, securely anchoring static contacts at each terminal, while gracefully positioned moving contacts adorn the ends of the fuse tube. The fuse tube is equipped with a state-of-the-art inner arc tube, combined with a durable outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse is distinguished by its superior adaptability, featuring auxiliary contacts and a meticulously designed arc chute for fluid current load transitions.
Under normal conditions, the drop-out fuse is securely fastened in a closed position, with the fuse tube held under precise tension. Upon detecting system faults, the fault current acts swiftly, blowing the fuse and creating an arc. This fierce arc ignites the arc tube, decomposing substantial gas volume and generating high pressure within the tube to craft a vertical wind path that skillfully extends and lengthens the arc. As the fuse blows, the moving contact is released, rotating outward with precision while the locking mechanism disengages, allowing the fuse tube to drop, achieving a decisive open position. For effective load pulling, an insulating rod is utilized to draw out the moving contact while maintaining a connection with the static contact. With continuous force, auxiliary contacts separate, creating an arc that stretches within the hood slit. The arc cover efficiently contains the gas, ensuring smooth arc extinguishment as the current nears zero.
Applications and Compliance Standards
This exceptional product is meticulously engineered for deployment in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It provides unwavering defense against overloads and short circuits while ensuring the efficient separation and combination of the rated load current.
The precision-crafted design of this product complies with the rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters are in line with the esteemed GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In instances where specific definitions are absent, modifications are adapted 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 epitomize high-performance outdoor high-voltage protection devices. Expertly designed to connect to the incoming feeder of distribution transformers or lines, they play a crucial role in shielding transformers and lines from short circuit events and overload conditions while adeptly handling the on/off load current. The drop-out fuse cutout features robust insulating supports and a fuse tube, with static contacts strategically secured on both sides and moving contacts skillfully affixed at the ends of the fuse tube. The fuse tube includes an advanced internal arc-extinguishing tube, complemented by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also incorporates high-performance, elastic auxiliary contacts and an arc-extinguishing enclosure for effective on-off load current switching.
In standard operational settings, 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 heats the arc-extinguishing tube, releasing copious volumes of gas and generating high pressure to elongate the arc within the tube. Once the fuse melts, the moving contact loses tension, allowing the mechanism to unlock, causing the fuse tube to gracefully drop out, transitioning to an open position. For seamless cutout load switching, operators deftly use 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. 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. shines brightly as a beacon of innovation and exceptional excellence in the dynamic world of electrical integration. As a high-tech enterprise, we proudly present a highly skilled R&D, production, and service team, fortified by over 15 years of steadfast dedication and expertise in the industry. Our commitment to pioneering solutions and our passion for progress make us a leader in our field.
Our expansive product portfolio includes high-voltage solid-state soft starters, advanced capacitor cabinets, high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These superior products are vital across numerous sectors, powering the energy and chemical industries, metal smelting operations, extensive electrical power grids, industrial manufacturing, and esteemed universities and research institutions. Our innovative solutions also invigorate the medical and pharmaceutical fields, bolster municipal commerce, enhance water conservation and hydropower initiatives, optimize road traffic systems, and elevate both commercial and residential developments.
Steadfast in our commitment to technological innovation and the ethos of 'smart manufacturing,' we are dedicated to attracting top-notch technical talent to comprehensively bolster our core competitive edge. Our unwavering dedication is to deliver unparalleled value to our clients, striving to create the most esteemed brand in the industry. From our inception, we have made relentless strides, transforming from inception to excellence. Our journey is paved with innovation and guided by a modern business ethos, where quality serves as our lifeline, market orientation is crucial, reputation-driven growth is essential, and efficiency is achieved through strategic management. We resolutely adhere to the principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and talent management efforts, 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 paramount, and customer satisfaction is our enduring creed. Our relentless pursuit of excellence, constant innovation, and commitment to building a trustworthy brand remain our guiding principles. Your recognition fuels our progress. We extend our warmest 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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