Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse stand as the pinnacle of outdoor high-voltage electrical protection devices. Ingeniously crafted, these devices are strategically installed on the high-voltage side of distribution transformers or serve as vital links within distribution lines. They act as indispensable protectors against transformer and line short circuits, as well as overload conditions, and facilitate seamless current management for opening and loading. With a design that epitomizes innovation, the drop-out fuse comprises an insulating bracket and fuse tubes, securely holding static contacts at each end, while gracefully attached moving contacts are positioned at the ends of the fuse tube. The fuse tube showcases an advanced inner arc tube, paired with a robust outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse is exceptional for its enhanced versatility, featuring auxiliary contacts and a meticulously designed arc chute for smooth current load transitions.
In normal operation, the drop-out fuse is firmly secured in a closed position, with the fuse tube maintained under precise tension. When system faults are detected, the fault current acts swiftly, blowing the fuse and creating an arc. This vigorous arc energizes the arc tube, releasing a substantial volume of gas and generating high pressure within the tube to form a vertical wind path that skillfully stretches and elongates the arc. As the fuse blows, the moving contact releases, rotating gracefully outwards while the locking mechanism disengages, enabling the fuse tube to drop and achieve a decisive breaking position. When load pulling is necessary, an insulating rod is used to draw out the moving contact while maintaining connection with the static contact. With continuous force application, auxiliary contacts separate, generating an arc that stretches within the hood slit. The arc cover effectively contains the gas, facilitating efficient arc extinguishment as the current approaches zero.
Applications and Compliance Standards
This distinguished product is meticulously crafted for deployment in 10 to 35KV distribution lines, encompassing 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 of this product adheres to the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters align with the esteemed GB15166.3-1994 standards for high voltage fuses, known as Expulsion fuses. In situations where specific definitions are absent, adjustments are meticulously 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 are the epitome of top-tier outdoor high-voltage protective devices. Meticulously engineered 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 adeptly managing the on/off load current. The drop-out fuse cutout comprises sturdy insulating supports and a fuse tube, with static contacts strategically fixed on both sides and moving contacts precisely positioned at the ends of the fuse tube. The fuse tube features 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 efficient on-off load current switching.
In typical operational scenarios, the fuse link ensures the fuse tube remains tightly closed. Upon encountering faults, the fault current quickly melts the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing substantial 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 gracefully drop out, transitioning to an open position. For cutout load switching, operators skillfully 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, 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. stands as a luminary in the ever-evolving sphere of electrical integration, pioneering innovation and excellence. As a vibrant high-tech enterprise, we proudly present a team of seasoned experts in R&D, production, and service, all driven by over 15 years of unwavering dedication and industry expertise.
Our extensive product portfolio includes high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, advanced gas-insulated switchgear, and robust substations. These premium-quality products are vital across a myriad of industries, including energy and chemical sectors, metal smelting, expansive electrical power grids, industrial manufacturing, and leading universities and research institutions. Our innovative solutions also power the medical and pharmaceutical fields, bolster municipal commerce, enhance water conservation and hydropower initiatives, streamline road traffic systems, and elevate both commercial and residential developments.
Firmly anchored in technological innovation and the 'smart manufacturing' philosophy, we are dedicated to attracting top-tier technical talent to amplify our core competitive advantage. We are steadfast in delivering unparalleled value to our clients, aspiring to establish the industry's most esteemed brand. From our inception, we have tirelessly advanced, transforming vision into excellence. Our journey is marked by continuous innovation and upheld by a modern business ethos, where quality is vital, market orientation is paramount, reputation-driven growth is crucial, and efficiency is achieved through strategic management. We resolutely adhere to the principles of 'technology as a guide, standardized management, exceptional quality, and customer satisfaction' in our quality and technical talent management, diligently expanding our market reach. Our mission is to invigorate China's electric power and grid transmission and distribution sectors with heightened speed, strength, and ambition. At the heart of our operations, integrity is essential, quality is inviolable, service reigns supreme, and customer satisfaction remains our enduring commitment. Our relentless pursuit of excellence, perpetual innovation, and dedication to building a trustworthy brand continue to guide us. Your recognition fuels our progress, and we extend heartfelt gratitude to all our loyal clients for their continuous support. Senhang Technology looks forward with enthusiasm to partnering with you for 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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