Product Description
General
The drop-out fuse and load drop-out fuse are vital outdoor high-voltage protective devices. Strategically positioned on the high-voltage side of a distribution transformer or as a crucial part of the distribution line, they offer robust protection against transformer and line short circuits, overloads, and enable seamless current operations. Crafted from high-quality insulating brackets and top-tier fuse tubes, these remarkable fuses feature static contacts on both ends of the insulation bracket and moving contacts on the fuse tube's ends. The fuse tube itself boasts an inner arc tube and is encased in a durable outer phenolic paper tube or epoxy glass cloth tube. The pull load drop-out fuse is ingeniously designed with flexible auxiliary contacts and an arc chute, significantly enhancing its capability to handle operational currents with ease.
In normal operations, the drop-out fuse's tensioned fuse tube ensures a secure closed position. However, when a system fault arises, the fault current swiftly blows the fuse, creating an arc. The arc tube, incited by the arc's heat, releases a prodigious amount of gas, building high pressure within the tube and directing strong vertical airflow. This dynamic process stretches and elongates the arc with incredible speed. Once the fuse blows, the moving contact loses its tension and disengages, triggering the locking mechanism to release the fuse tube, which then drops to create a breaking position. When disconnecting the load, operators can skillfully use an insulating rod to manipulate the moving contact. At this juncture, both moving and static contacts remain engaged. With continued manipulation, the auxiliary contacts separate, producing an arc between them. This arc extends through the hood slit, where the arc cover's gas extinguishes it as the current reaches zero.
Use and Standards
Our product finds its application in 10 to 35KV distribution line branches and the primary side of distribution transformers, ensuring impeccable overload and short circuit protection. It adeptly separates and combines rated load currents, safeguarding the entire system.
The model of this product adheres to the JB/T8321-1996 standards for AC high-voltage fuses, with parameters crafted in accordance with GB15166.3-1994 standards for high voltage expulsion fuses. While the standards may not specify all crucial parameters and configurations, adjustments are made following the JB/DQ2139-1986 standards for outdoor high voltage drop fuses ranging from 10 to 35KV, ensuring technological excellence.
The drop-out fuse cutout and load switching fuse cutout are highly reliable outdoor high voltage protective devices. They seamlessly connect to the incoming feeder of a distribution transformer or distribution lines to provide unparalleled protection against short circuits and overloads, while facilitating efficient on/off current operations. The drop-out fuse cutout is ingeniously constructed with insulating supports and a robust fuse tube. Static contacts are securely fixed on both sides of the insulator support, whereas moving contacts are strategically positioned on both ends of the fuse tube. The fuse tube is designed with an arc-extinguishing tube inside and an outer phenolic compound paper tube or an epoxy glass tube. The load switching fuse cutout is further enhanced with enforced elastic auxiliary contacts and an arc-extinguishing enclosure, allowing it to adeptly handle operational currents.
In standard operating conditions, the fuse link tightens the fuse tube, securing it in a closed position. When a fault occurs, the fault current causes the fuse to melt instantaneously, creating an electrical arc. This arc heats the arc-extinguishing tube, causing it to release a large volume of gas, generating high pressure and directing a forceful flow along the tube. Once the fuse link melts, the moving contact loses tension, locking the mechanism and causing the fuse tube to drop out, placing the cutout in an open position. When it is necessary to switch off during cutout loading, operators use an insulating operating bar to manipulate the moving contact. Initially, the main contact and auxiliary static contact remain engaged. As pulling continues, the auxiliary contacts separate, generating an arc between them. This arc extends into the arc-extinguishing enclosure gap, where the release of arc-extinguishing gas extinguishes 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 beacon of innovation in the realm of electrical integration, proudly standing as a high-tech enterprise that leads with expertise and passion. With a professional team dedicated to research, development, production, and service, we bring over 15 years of rich industry experience to the forefront of our operations.
Our distinguished portfolio encompasses advanced high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, state-of-the-art gas-insulated switchgear, as well as robust substations. Our innovative solutions are employed across a diverse spectrum of industries including energy and chemicals, metal smelting, power grids, industrial manufacturing, academia and research, as well as the medical and pharmaceutical arenas. Additionally, our products serve municipal commerce, water conservation and hydropower projects, transportation infrastructures, and both commercial and residential sectors with exemplary efficiency and reliability.
Embracing a forward-thinking approach, we adhere to the ethos of technological innovation and 'smart manufacturing,' consistently enhancing our core strengths by integrating high-caliber technical professionals. Our commitment lies in providing unparalleled service value to our clientele and in cultivating the premiere brand in our industry. From our inception, Zhejiang ChaoTai has been on a trajectory of continuous progress—transforming from humble beginnings to a paragon of excellence. We champion innovation and tread a modern business path, hinging on quality for survival, market orientation for growth, reputation for development, and management for efficiency. Guided by a steadfast dedication to 'technology leadership, standardized management, superior quality, and customer satisfaction,' we bolster our market edge, aiming to serve China's power transmission and distribution sectors with swiftness and strength. Our guiding principles—integrity, paramount quality, top-tier service, and customer satisfaction—are the bedrock of our operations. Committed to excellence and ceaseless innovation, we aspire to forge a brand synonymous with trustworthiness. Your recognition fuels our ambition, and we extend heartfelt gratitude to all our esteemed clients for their enduring trust and support. Senhang Technology eagerly anticipates partnering with you to shape a future replete with possibilities.
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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