Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage electrical protection technology. Engineered with precision, these devices are strategically positioned on the high-voltage side of distribution transformers or as essential support links in distribution lines. They serve as crucial safeguards against transformer and line short circuits, overload conditions, and enable seamless opening and loading of current. Meticulously crafted, the drop-out fuse consists of an insulating bracket and fuse tubes, with static contacts firmly secured at each end and moving contacts elegantly affixed to the ends of the fuse tube. The sophisticated construction of the fuse tube features an advanced inner arc tube paired with a resilient outer phenolic paper tube or epoxy glass cloth tube. Distinguished by its enhanced flexibility, the Pull Load Drop-out Fuse features auxiliary contacts and an arc chute meticulously engineered for smooth load current operations.
During standard operations, the drop-out fuse remains securely locked in a closed position, with the fuse tube precisely tensioned. Upon detecting system faults, the fault current rapidly acts, blowing the fuse and generating an arc. This intense arc ignites the arc tube, decomposing substantial gas volumes and producing high pressure within the tube to create a vertical wind path that adeptly stretches and elongates the arc. As the fuse blows, the moving contact releases, rotating gracefully outwards as the locking mechanism disengages, allowing the fuse tube to drop and reach a decisive breaking position. When load pulling is required, an insulating rod is employed to draw out the moving contact while maintaining connection with the static contact. With sustained force, auxiliary contacts separate, creating an arc between them that elongates within the hood slit. The arc cover effectively contains the gas, facilitating efficient arc extinguishment as the current reaches zero.
Applications and Compliance Standards
This exceptional product is meticulously designed for application in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It provides reliable protection against overloads and short circuits while enabling 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 prestigious GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In instances where detailed definitions are absent, adaptations 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 stand as premier outdoor high-voltage protective devices. Expertly crafted to connect with the incoming feeder of distribution transformers or lines, they assume a vital role in protecting transformers and lines from short circuit incidents and overload conditions while proficiently managing the on/off load current. The drop-out fuse cutout comprises robust insulating insulator supports and a fuse tube, with static contacts fixed on both sides and moving contacts expertly installed at the ends of the fuse tube. The fuse tube features a sophisticated internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also incorporates enhanced, 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 rapidly melts the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing significant gas volumes and creating high pressure to elongate the arc within the tube. Post-melting, the moving contact loses tension, enabling the mechanism to unlock and the fuse tube to drop out, transitioning to an open position. For cutout load switching, operators utilize an insulating operating bar to pull 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, elongating 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. embodies a beacon of cutting-edge innovation and unmatched excellence in the realm of electrical integration. As a dynamic high-tech enterprise, we proudly present a seasoned R&D, production, and service team, fortified by over 15 years of steadfast dedication and expertise in the industry. Our journey is a testament to pioneering progress, marked by a commitment to excellence and industry leadership.
Our expansive portfolio boasts high-voltage solid-state soft starters, advanced capacitor cabinets, both high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These top-tier products are vital across a multitude of sectors, catering to the energy and chemical industries, metal smelting operations, expansive electrical power grids, industrial manufacturing, and esteemed universities and research institutions. Additionally, our innovative solutions power the medical and pharmaceutical fields, support municipal commerce, enhance water conservation and hydropower projects, optimize road traffic systems, and elevate commercial and residential developments to new heights.
Rooted in a steadfast commitment to technological innovation and guided by the philosophy of 'smart manufacturing,' we are dedicated to attracting elite technical talent to comprehensively bolster our core competitive advantage. Our unwavering dedication is to deliver unparalleled value to our clients, aspiring to create the industry's most esteemed brand. From our inception, we've driven relentless progress, evolving from conception to excellence. Our journey is illuminated by innovation and sustained by a modern business ethos where quality is our lifeline, market orientation is paramount, reputation-driven growth is essential, and efficiency is achieved through strategic management. We adhere firmly to the guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and talent management, diligently expanding our market presence. Our mission is to serve China's electric power and grid transmission and distribution sectors with accelerating speed, strength, and ambition. At our core, integrity is indispensable, quality is inviolable, service is preeminent, and customer satisfaction is our eternal creed. Our relentless pursuit of excellence, constant innovation, and commitment to building a trustworthy brand remain our guiding principles. Your acknowledgment propels our progress. We extend profound gratitude to our loyal clients for their enduring support, and Senhang Technology eagerly anticipates collaborating with you to forge 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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