Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are quintessential solutions for outdoor high-voltage electrical protection. Strategically engineered, these devices are positioned on the high-voltage side of distribution transformers or serve as pivotal links in distribution lines. They offer essential safeguarding against transformer and line short circuits, overload conditions, and facilitate the seamless opening and co-loading of current. Expertly crafted, the drop-out fuse includes an insulating bracket and fuse tubes, with static contacts firmly affixed at both ends of the bracket and moving contacts attached to the ends of the fuse tube. The fuse tube construction features a robust inner arc tube, complemented by an outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse is a marvel of engineering, boasting enhanced flexibility with auxiliary contacts and an arc chute, meticulously designed to ensure flawless current load operations.
During standard operations, the drop-out fuse remains securely closed with the fuse tube tensioned. In the event of a system malfunction, the fault current promptly blows the fuse, generating a formidable arc. This arc ignites the arc tube, causing the decomposition of large gas volumes, creating high pressure within the tube, and generating a powerful vertical wind path that swiftly stretches and elongates the arc. As the fuse blows, the moving contact releases tension and rotates outwards, while the locking mechanism disengages, allowing the fuse tube to gracefully drop and achieve a breaking position. When load pulling becomes necessary, an insulating rod is artfully employed to pull the moving contact, maintaining its connection with the static contact. With sustained effort, the auxiliary contacts separate, creating an arc between them that is skillfully stretched within the hood slit. The arc cover, designed to contain gas, facilitates the efficient extinguishment of the arc as the current approaches zero.
Use and Standards
This distinguished product is meticulously crafted for deployment in 10 to 35KV distribution lines, including branching lines and on the primary side of distribution transformers. It provides robust protection against overloads and short circuits, while enabling the efficient separation and combination of the rated load current.
The meticulous design of this product strictly adheres to the JB/T8321-1996 Method for AC high-voltage fuse preparation. The product parameters are precisely aligned with GB15166.3-1994 high voltage fuses Expulsion fuses standards. In cases where standards lack detailed definitions of critical parameters and configurations, adjustments are deftly made following 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 represent the pinnacle of outdoor high-voltage protective devices. Expertly designed to connect with the incoming feeder of distribution transformers or lines, they play an indispensable role in safeguarding transformers and lines from short circuit incidents and overload conditions, while deftly managing the on/off load current. Comprising insulating insulator supports and a fuse tube, the drop-out fuse cutout features static contacts fixed on both sides of the insulator support and moving contacts installed at the fuse tube's ends. The fuse tube's internal arc-extinguishing tube is expertly paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout further includes enforced elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring optimal efficiency in on-off load current switching.
In normal operational scenarios, the fuse link ensures the fuse tube remains tightened, maintaining a steadfast closed position. When faults occur, the fault current swiftly causes the fuse to melt, generating an electric arc. This triggers the arc-extinguishing tube to heat and release a substantial volume of gas, creating high pressure and elongating the arc throughout the tube. Once the fuse link melts, the moving contact loses its tension, allowing the mechanism to lock and the fuse tube to gracefully drop out, transitioning to an open position. For load switching during cutout, operators utilize an insulating operating bar to delicately pull the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact is progressively pulled, an electric arc forms between the auxiliary contacts, which elegantly elongates within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expertly expels 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 as the epitome of innovation and superiority in the field of electrical integration. As a forward-thinking high-tech enterprise, we bring together a highly experienced R&D, production, and service team, with over 15 years of dedicated expertise in the industry, continuously pushing the boundaries of excellence.
Our comprehensive product range features high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and durable substations. These high-performance products are indispensable across a wide array of sectors, including the energy and chemical industries, metal smelting, expansive electric power grids, industrial manufacturing, as well as renowned universities and research institutions. Furthermore, our innovative solutions empower the medical and pharmaceutical fields, elevate municipal commerce, enhance water conservancy and hydropower projects, optimize road traffic systems, and enrich both commercial and residential developments, providing unmatched value and reliability.
With an unwavering commitment to technological innovation and the 'smart manufacturing' philosophy, we are focused on attracting exceptional technical talent to comprehensively enhance our core competitive strengths. Our unwavering dedication to delivering unmatched value to clients drives us to establish the industry's most respected brand. Since our inception, we have embarked on a relentless journey from inception to excellence, driven by a modern business ethos that honors quality as our lifeline, emphasizes market orientation, fosters reputation-driven development, and champions management-driven efficiency. Our guiding principles include 'technology as the guide, standardized management, exceptional quality, and customer satisfaction,' which bolster our market prominence. Our mission is to energize China's electric power and grid transmission and distribution sectors with heightened speed, strength, and ambition. At our core, integrity is our foundation, quality is paramount, service is supreme, and customer satisfaction is our eternal commitment. Our steadfast pursuit of excellence, relentless innovation, and dedication to building a trustworthy brand remain our guiding lights. Your recognition propels our progress. We extend our deepest gratitude to all our loyal clients for their unwavering support, and Zhejiang ChaoTai Complete Equipment Co., Ltd. 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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