Product Description
General
The drop-out fuse and pull-load drop-out fuse are critical outdoor high-voltage protective devices. Perfectly engineered to be installed on the high-voltage side of distribution transformers or as the pivotal Support Link of distribution lines, these fuses provide robust protection against short circuits and overloads, all while managing open and co-load currents. Constructed with superior materials, the drop-out fuse features a resilient insulating bracket and durable fuse tubes. Static contacts are securely positioned at both ends of the insulation bracket, while moving contacts are adeptly mounted on the ends of the fuse tube. This innovative fuse tube is a composite of an inner arc-extinguishing tube and an outer phenolic paper tube or epoxy glass cloth tube. The pull-load drop-out fuse is enhanced with flexible auxiliary contacts and an efficient arc chute to expertly handle open and co-load currents.
In regular operation, the fuse tube remains securely in a closed position due to the tension exerted by the fuse. Upon system malfunction, the fault current swiftly blows the fuse, swiftly generating an arc. The arc's powerful energy ignites the arc tube, releasing copious amounts of gas, which creates high pressure within the tube and generates a vertical wind along the pipeline. This mechanism rapidly stretches and elongates the arc. Once the fuse blows, the moving contact loses tension, prompting the locking mechanism to release the fuse tube, subsequently dropping and creating a breaking position. When it becomes necessary to pull the load, an insulating rod is utilized to disengage the moving contact. At this juncture, the moving and static contacts remain engaged. Subsequent pulling with the insulating rod results in the separation of the auxiliary contacts, leading to the formation of an arc between them. The arc is then effectively stretched within the hood slit, with the arc cover containing gas. When the current reaches zero, the arc is extinguished.
Use and Standards
This meticulously designed product is intended for use in 10 ~ 35KV distribution lines, specifically in branching lines and on the primary side of distribution transformers. It offers exceptional overload and short circuit protection, allowing for the seamless separation and combination of the rated load current.
The product model adheres to the JB/T8321-1996 Method of Type AC High-Voltage Fuses. It is crafted in alignment with the GB15166.3-1994 standards for high-voltage expulsion fuses. Although the standards do not explicitly define all critical parameters and configurations, necessary corrections have been made based on JB/DQ2139-1986 interim technology requirements for 10 ~ 35KV outdoor high-voltage drop fuses.
The drop-out fuse cutout and load-switching fuse cutout are state-of-the-art outdoor high-voltage protective devices. They are integral to connecting with the incoming feeder of a distribution transformer or energizing distribution lines. Their primary function is to safeguard transformers or lines against short circuits and overloads, while enabling efficient on/off loading and current management. Each drop-out fuse cutout is composed of robust insulate insulator supports and a reliable fuse tube. Static contacts are affixed to both sides of the insulator support, and moving contacts are expertly installed on the ends of the fuse tube. This sophisticated fuse tube consists of a proficient inside arc-extinguishing tube and an outer layer made of phenolic compound paper or epoxy glass tube. The load-switching fuse cutout features enforced elastic auxiliary contacts and an arc-extinguishing enclosure to adeptly manage switching on/off loading currents.
During normal operations, a securely tightened fuse link ensures that the fuse tube maintains a closed position. Should a fault occur within the system, the resultant fault current swiftly melts the fuse, creating an electrical arc. This arc energizes the arc-extinguishing tube, causing it to release a large volume of gas and generate high pressure, which directs the arc along the tube. Once the fuse link has melted, the moving contact loses its tension, leading to a locked mechanism and the dropping of the fuse tube, transitioning the cutout to an open position. When it is necessary to switch off during the cutout loading, an operator uses an insulating operating bar to disengage the moving contact. Initially, the main contact remains in contact with the auxiliary static contact. As the operator continues to pull, the auxiliary contact is separated, resulting in the formation of an electric arc between the auxiliary contacts. This arc elongates within the arc-extinguishing enclosure gap, with the arc-extinguishing mechanism releasing gas to 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 at the pinnacle of high-tech innovation in the realm of electrical integration. With a dedicated team of experts in research, development, production, and service, our company boasts over 15 years of profound industry expertise, positioning us as leaders in our field.
Our illustrious product line encompasses state-of-the-art high-voltage solid-state soft starters, advanced capacitor cabinets, sophisticated high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. Our innovations have permeated a multitude of sectors, including the dynamic energy and chemical industries, stringent metal smelting processes, expansive electric power grids, and diverse industrial manufacturing. Further applications span prestigious universities, forward-thinking research institutions, vital medical and pharmaceutical sectors, bustling municipal commerce, essential water conservancy, pivotal hydropower, crucial road traffic systems, and thriving commercial and residential areas.
Embracing a visionary approach, we adhere to an ethos of 'smart manufacturing,' fostering technological innovation by integrating top-tier technical talents. This strategy fortifies our core competencies, enabling us to deliver unparalleled value to our esteemed clientele while aspiring to be the industry's benchmark brand. Since inception, our trajectory of continuous improvement has transformed us from humble beginnings to a paragon of excellence. Our relentless pursuit of innovation is guided by a modern business doctrine: we thrive on quality, are driven by market demands, and rely on reputation for development, while management ensures efficiency. Our commitment is unwavering: 'technology as the guide, standardized management, exceptional quality, and unmatched customer satisfaction.' This commitment strengthens our market presence and invigorates our mission to serve China's electric power and grid distribution fields with unprecedented speed, strength, and ambition. Integrity is our foundation, quality our hallmark, service our creed, and customer satisfaction our everlasting promise. Our relentless pursuit of excellence, ceaseless innovation, and steadfast dedication to building a trusted brand are the cornerstones of our growth. Your trust fuels our ambition. We extend our heartfelt gratitude to our cherished new and loyal customers for their unwavering support and affection. Zhejiang ChaoTai looks forward to forging a brighter future together with you, hand in hand.
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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