Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse stand as the pinnacle of outdoor high-voltage electrical protection. Crafted with exceptional expertise, these devices are strategically placed on the high-voltage side of distribution transformers or serve as vital support within distribution lines. They act as indispensable guardians against transformer and line short circuits and overload conditions while allowing seamless control of current for opening and loading. With a design that embodies cutting-edge innovation, the drop-out fuse comprises an insulating bracket and fuse tubes, firmly securing static contacts at each end, while gracefully affixed moving contacts adorn the ends of the fuse tube. The fuse tube features an advanced inner arc tube, paired with a durable outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse stands out for its enhanced versatility, featuring auxiliary contacts and a meticulously crafted arc chute that ensures smooth transitions of current loads.
During regular operation, the drop-out fuse remains securely fastened in a closed position, with the fuse tube under precise tension. Upon detecting system faults, the fault current acts swiftly, blowing the fuse and igniting a dynamic arc. This vigorous arc activates the arc tube, decomposing a significant volume of gas to create high pressure within the tube, forging a vertical wind path that skillfully stretches and elongates the arc. As the fuse blows, the moving contact releases, rotating gracefully outward while the locking mechanism disengages, allowing the fuse tube to drop decisively into a breaking position. When load pulling is required, an insulating rod is used to draw out the moving contact while maintaining linkage with the static contact. With continuous force, auxiliary contacts separate, generating an arc that stretches within the hood slit. The arc cover efficiently contains the gas, facilitating 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 offers steadfast protection against overloads and short circuits, while ensuring effective separation and combination of the rated load current.
The precision-engineered design adheres to the stringent JB/T8321-1996 AC high-voltage fuse preparation method. Its parameters align with the distinguished GB15166.3-1994 standards for high voltage fuses, specifically Expulsion fuses. In cases where definitions are not detailed, adjustments are made following 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 protective devices. Meticulously designed to connect with the incoming feeder of distribution transformers or lines, they play a crucial role in safeguarding transformers and lines from short circuit incidents and overload conditions, while efficiently managing on/off load current. The drop-out fuse cutout comprises robust insulating supports and a fuse tube, with static contacts strategically positioned 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, 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 efficient on-off load current switching.
In standard operational scenarios, the fuse link keeps the fuse tube tightly closed. When faults occur, the fault current swiftly melts the fuse, creating an electric arc that heats the arc-extinguishing tube, releasing substantial gas volumes 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 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 pulled, an electric arc forms between them, stretching within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism efficiently expels gas to extinguish the arc 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. is a shining star in the world of electrical integration, renowned for its groundbreaking innovation and unmatched excellence. As a dynamic high-tech enterprise, we proudly present a team of highly skilled R&D, production, and service professionals, who bring over 15 years of steadfast dedication and industry expertise.
Our extensive product lineup includes high-quality high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and durable substations. These superior products are crucial across a spectrum of industries, including energy and chemicals, metal smelting, expansive electrical power grids, industrial manufacturing, and elite universities and research centers. Additionally, our innovative solutions power the medical and pharmaceutical sectors, bolster municipal commerce, enhance water conservation and hydropower initiatives, optimize road traffic systems, and elevate both commercial and residential projects.
Driven by a steadfast commitment to technological advancement and the principles of 'smart manufacturing,' we are dedicated to attracting the industry's finest technical talent to significantly bolster our core competitive edge. We are unwavering in our mission to deliver unparalleled value to our clients, with an aspiration to establish the most esteemed brand in the industry. From our inception, we have progressed relentlessly, evolving into a beacon of excellence. Guided by innovation and modern business ethics, where quality is our backbone, market alignment is crucial, reputation-driven expansion is essential, and strategic management ensures efficiency. We remain true to the guiding principles of 'technology as the beacon, standardized management, superior quality, and unwavering customer satisfaction' in our quality and technical talent management efforts, actively expanding our market footprint. Our mission is to serve China's electric power and grid transmission and distribution sectors with increasing vigor, prowess, and ambition. At our core, integrity is sacrosanct, quality is paramount, service is king, and customer satisfaction is our eternal commitment. Our relentless pursuit of perfection, constant innovation, and dedication to building a reliable brand remain our guiding ethos. Your recognition fuels our progress. We extend heartfelt gratitude to all our loyal clients for their unwavering support, and Senhang Technology eagerly looks forward to collaborating with you to co-create a brighter future.
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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