Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse are the pinnacle of innovation in outdoor high-voltage electrical protection. These expertly crafted devices are strategically placed on the high-voltage side of distribution transformers or as vital components within distribution lines. They stand as critical sentinels against transformer and line short circuits, overload scenarios, while facilitating seamless current management for opening and loading operations. With a design that radiates sophistication, the drop-out fuse comprises a sturdy insulating bracket and fuse tubes, ensuring static contacts are securely positioned at each end, complemented by gracefully attached moving contacts on the fuse tube. The fuse tube features an advanced inner arc tube and a robust outer phenolic paper or epoxy glass cloth tube. The Pull Load Drop-out Fuse is renowned for its exceptional versatility, boasting auxiliary contacts and a finely crafted arc chute for smooth current load transitions.
In normal functioning, the drop-out fuse is securely held in a closed position, with the fuse tube under precise tension. When system faults arise, the fault current swiftly acts, blowing the fuse and creating an arc. This vigorous arc ignites the arc tube, breaking down a substantial volume of gas and generating high pressure within the tube to craft a vertical wind path that skillfully stretches and elongates the arc. As the fuse blows, the moving contact releases, rotating with elegance outwards while the locking mechanism disengages, allowing the fuse tube to drop into a decisive breaking position. When load pulling is required, an insulating rod is utilized to draw out the moving contact while maintaining a connection with the static contact. With steady force application, auxiliary contacts separate, generating an arc that stretches within the hood slit. The arc cover expertly contains the gas, enabling efficient arc extinguishment as the current nears zero.
Applications and Compliance Standards
This distinguished product is meticulously crafted for use in 10 to 35KV distribution lines, covering 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 complies with the rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters are aligned with the esteemed GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In scenarios lacking detailed definitions, adjustments are made according to 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 stand as paragons of high-performance outdoor high-voltage protective devices. Thoughtfully designed to connect with the incoming feeder of distribution transformers or lines, they play an indispensable role in shielding transformers and lines from short circuit events and overload conditions while expertly 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 meticulously affixed at the ends of the fuse tube. The fuse tube boasts a sophisticated internal arc-extinguishing tube, complemented by 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 tightly sealed. Upon encountering faults, the fault current rapidly 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 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 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 approaches 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 beacon of groundbreaking innovation and unparalleled excellence within the dynamic realm of electrical integration. As a vibrant high-tech enterprise, we proudly present a seasoned team in R&D, production, and service, boasting over 15 years of steadfast dedication and industry expertise.
Our diverse portfolio features high-voltage solid-state soft starters, sophisticated capacitor cabinets, advanced high and low voltage switchgear, cutting-edge gas-insulated switchgear, and durable substations. These premium products are vital across an array of sectors, serving energy, chemical, and metal industries, expansive electrical power grids, industrial manufacturing, and elite universities and research institutions. Moreover, our solutions empower the medical and pharmaceutical fields, bolster municipal commerce, enhance water conservation and hydropower, optimize road traffic systems, and enrich both commercial and residential developments.
Rooted in a robust commitment to technological innovation and the ethos of 'smart manufacturing,' we are dedicated to attracting top-tier technical talent, thereby significantly bolstering our core competitive edge. Our unwavering mission is to deliver unmatched value to our clients, with the aspiration of creating the industry's most esteemed brand. Our evolution from inception to excellence is marked by relentless progress. Our journey is characterized by innovation and driven by a modern business philosophy, where quality is our lifeline, market orientation is paramount, reputation-driven growth is essential, and efficiency is achieved through strategic management. We adhere to the guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and technical talent management, striving to expand our market influence. Our mission is to serve China's electric power and grid transmission and distribution sectors with increasing velocity, strength, and ambition. At our core, integrity is indispensable, quality is sacred, service is supreme, and customer satisfaction is our enduring promise. Our relentless quest for excellence, continuous innovation, and dedication to building a trustworthy brand stay as our guiding doctrines. Your recognition fuels our advancement. We extend heartfelt gratitude to our loyal clients for their steadfast support, and Senhang Technology eagerly anticipates collaborating 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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