Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage electrical protection solutions. These meticulously engineered devices are strategically deployed on the high-voltage side of distribution transformers or as essential components within distribution lines. They provide indispensable protection against transformer and line short circuits, as well as overload conditions, while facilitating smooth current interruption and load handling. The drop-out fuse showcases a sophisticated structure featuring an insulating bracket and fuse tubes, with securely affixed static contacts at both ends of the bracket and strategically positioned moving contacts at the ends of the fuse tube. This advanced design incorporates an inner arc tube paired with an outer phenolic paper or epoxy glass cloth tube for enhanced durability. The Pull Load Drop-out Fuse is engineered for superior adaptability, equipped with auxiliary contacts and an arc chute, ensuring flawless current management under load conditions.
During regular operations, the drop-out fuse remains securely locked in a closed position, thanks to the tensioned fuse tube. In the event of a system fault, the fault current rapidly melts the fuse, leading to the formation of an arc. This arc triggers the arc tube to ignite, resulting in the decomposition of substantial gas volumes, which in turn creates high pressure within the tube and generates a powerful vertical wind path. This sophisticated mechanism effectively stretches and elongates the arc to mitigate its effects. Upon fuse operation, the moving contact releases its tension, pivoting outward, while the locking mechanism disengages, allowing the fuse tube to drop and switch to an open position. When load handling is required, an insulating rod is utilized to operate the moving contact, maintaining its engagement with the static contact. With further operation, the auxiliary contacts separate, forming an arc between them that is deliberately elongated within the hood slit. The arc cover, containing gas, facilitates efficient arc extinguishment as the current approaches zero.
Use and Standards
This exceptional product is expertly crafted for optimal performance in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It provides robust defense against overloads and short circuits while ensuring seamless separation and integration of the rated load current.
The rigorous design of this product aligns with the JB/T8321-1996 Method for AC high-voltage fuse preparation guidelines, with its parameters adhering to the GB15166.3-1994 high voltage fuses Expulsion fuses standards. In situations where standards do not specify critical parameters and configurations in detail, adjustments 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. These cutting-edge solutions are designed to connect with the incoming feeder of distribution transformers or lines, playing a vital role in shielding transformers and lines from short circuit occurrences and overload situations while adeptly handling on/off load current. The drop-out fuse cutout is composed of insulating insulator supports and a fuse tube, with static contacts securely anchored on both sides of the insulator support and moving contacts precisely installed at the ends of the fuse tube. The innovative design of the fuse tube includes an internal arc-extinguishing tube along with a sturdy outer phenolic compound paper or epoxy glass tube. The load switching fuse cutout also features enhanced elastic auxiliary contacts and an arc-extinguishing enclosure for efficient on-off load current management.
Under normal operational conditions, the fuse link ensures the fuse tube is securely tensioned to maintain a closed position. When faults arise, the fault current instantly causes the fuse to melt, creating an electric arc. This process ignites the arc-extinguishing tube, which releases a significant volume of gas, generating high pressure and extending the arc lengthwise throughout the tube. After the fuse link melts, the moving contact loses its tension, permitting the mechanism to disengage and the fuse tube to drop out, transitioning to an open position. For load switching during cutout procedures, operators utilize an insulating operating bar to engage the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact is further manipulated, an electric arc forms between the auxiliary contacts, extending within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism releases 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 paragon of innovation and excellence within the sphere of electrical integration. As a forward-thinking high-tech enterprise, we pride ourselves on possessing a seasoned team dedicated to research and development, production, and service, fortified by over 15 years of profound industry expertise.
Our expansive product portfolio boasts high-voltage solid-state soft starters, capacitor cabinets, advanced high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and resilient substations. These high-performance products play a vital role across an array of industries, including energy and chemical sectors, metal smelting, extensive electric power grids, industrial manufacturing, as well as prestigious universities and research institutions. Moreover, our solutions empower the medical and pharmaceutical fields, support municipal commerce, enhance water conservancy and hydropower projects, optimize road traffic systems, and enrich both commercial and residential developments.
Firmly rooted in our unwavering commitment to technological innovation and the ethos of 'smart manufacturing,' we are dedicated to attracting top-tier technical talent to comprehensively enhance our company's core competitive strengths. We are passionately devoted to delivering unparalleled value to our clients and are driven by the aspiration to forge the most esteemed brand in the industry. Since our inception, we have relentlessly advanced, evolving from a nascent entity to a beacon of excellence. Our journey is charted by our commitment to innovation and sustained by a modern business ethos, emphasizing quality as our lifeline, market orientation, reputation-driven development, and management-driven efficiency. We steadfastly adhere to our guiding tenets of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in quality and technical talent management, diligently working to augment our market presence. Our mission is to serve China's electric power and grid transmission and distribution fields with ever-increasing speed, strength, and ambition. At our core, integrity is non-negotiable, quality is sacrosanct, service reigns supreme, and customer satisfaction is our perpetual creed. Our unwavering pursuit of excellence, relentless innovation, and commitment to building a trustworthy brand remain our guiding principles. Your recognition fuels our progress. We extend heartfelt gratitude to all our loyal clients for their enduring support, and Zhejiang ChaoTai Complete Equipment Co., Ltd. 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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