Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse stand as the pinnacle of outdoor high-voltage electrical protection, meticulously crafted for excellence. Expertly designed, these devices are strategically positioned on the high-voltage side of distribution transformers or serve as vital links within distribution lines. As guardians against transformer and line short circuits, they also manage overload scenarios, ensuring seamless current regulation for precise opening and loading. With a design that radiates innovation, the drop-out fuse merges an insulating bracket with fuse tubes, securely anchoring static contacts while seamlessly attached moving contacts enhance the ends of the fuse tube. Elevating its construction, the fuse tube features an advanced inner arc tube, harmoniously paired with a sturdy outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse is notable for its dynamic versatility, incorporating auxiliary contacts and a precisely engineered arc chute to facilitate smooth current load transitions.
Under normal conditions, the drop-out fuse remains confidently fastened in a closed position, with the fuse tube precisely tensioned. In the event of system faults, the fault current swiftly actuates, triggering the fuse and igniting an arc. This powerful arc sparks the arc tube, decomposing a substantial volume of gas and generating high pressure to create a vertical wind path, expertly stretching and elongating the arc. Upon fuse operation, the moving contact releases, elegantly pivoting outward as the locking mechanism disengages, allowing the fuse tube to drop for a decisive breaking position. For load pulling, an insulating rod is skillfully employed to extract the moving contact while maintaining synchronization with the static contact. With sustained force, the auxiliary contacts separate, generating an arc that gracefully stretches within the hood slit. The arc cover adeptly contains the gas, allowing for efficient arc extinguishment as the current approaches zero.
Applications and Compliance Standards
This exceptional product is designed for deployment in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It delivers steadfast protection against overloads and short circuits, while ensuring efficient separation and combination of the rated load current.
Crafted with precision engineering, this product complies with the rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters meet the esteemed GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In instances where specific definitions are not detailed, adjustments are made 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 engineered, they connect to the incoming feeder of distribution transformers or lines, playing a crucial role in protecting transformers and lines from short circuit incidents and overload conditions, while efficiently managing the on/off load current. Composed of robust insulating supports and a fuse tube, the drop-out fuse cutout features static contacts securely fixed on both sides and moving contacts expertly affixed at the ends of the fuse tube. The fuse tube is enhanced by a sophisticated internal arc-extinguishing tube, paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also features high-performance, elastic auxiliary contacts and an arc-extinguishing enclosure for optimized on-off load current switching.
In typical operational scenarios, the fuse link ensures the fuse tube remains securely closed. Upon encountering faults, the fault current rapidly melts the fuse, producing an electric arc that heats the arc-extinguishing tube, releasing a substantial volume 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 gracefully drop out, transitioning to an open position. For cutout load switching, operators expertly 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, stretching within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism expels gas for efficient arc extinguishment as the current reaches 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 as a beacon of innovation and unmatched excellence in the ever-evolving world of electrical integration. As a dynamic high-tech enterprise, we proudly present our experienced R&D, production, and service team, backed by over 15 years of dedicated expertise and commitment to industry leadership.
Our broad product line includes high-voltage solid-state soft starters, advanced capacitor cabinets, high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These premium products are essential in multiple sectors, powering the energy and chemical industries, metal smelting, extensive electrical power grids, industrial manufacturing, and top universities and research institutions. Additionally, our solutions invigorate the medical and pharmaceutical sectors, support municipal commerce, bolster water conservation and hydropower projects, streamline road traffic systems, and enhance both commercial and residential developments.
Firmly rooted in our commitment to technological innovation and the ethos of 'smart manufacturing,' we are dedicated to attracting top-tier talent to fortify our core competitive edge. Our unwavering mission is to deliver unrivaled value to our clients, aspiring to forge the industry's most esteemed brand. From our inception, we have advanced from foundation to excellence, a journey marked by innovation and sustained by a modern business ethos. Here, quality is our lifeline, market orientation is crucial, reputation-driven growth is imperative, and efficiency is achieved through strategic management. We consistently adhere to the principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and talent management, working tirelessly to expand our market reach. Our mission is to serve China's electric power and grid transmission and distribution sectors with unmatched speed, strength, and ambition. At our core, integrity is unwavering, quality is sacrosanct, service is paramount, and customer satisfaction remains our enduring creed. Our relentless pursuit of excellence, continuous innovation, and commitment to building a trustworthy brand are our guiding lights. Your recognition fuels our progress. We extend our sincere gratitude to all our loyal clients for their steadfast support, and Senhang Technology eagerly looks forward to collaborating 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.
Audited Supplier 
){kind=link}