Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are essential for robust outdoor high-voltage electrical protection. They are strategically installed on the high-voltage side of distribution transformers or as pivotal links in distribution lines, serving as a shield against transformer and line short circuits, overloads, and facilitating the seamless separation and integration of current. Ingeniously designed, the drop-out fuse comprises an insulating bracket and fuse tubes, with static contacts secured at either end of the bracket and moving contacts at the ends of the fuse tube. The fuse tube is a marvel of engineering with an inner arc tube and an outer phenolic paper or epoxy glass cloth tube. Enhanced for flexibility, the Pull Load Drop-out Fuse has auxiliary contacts and an arc chute, crafted specifically for fluid current load operations.
In normal operation, the drop-out fuse maintains a closed position with the fuse tube securely tensioned. During a fault, the fault current blows the fuse, creating an arc that ignites the arc tube. This process decomposes large gas volumes, generating high pressure and a vertical wind path to elongate the arc. Once the fuse blows, the moving contact loses tension and rotates outwards, allowing the fuse tube to drop to a breaking position. For load pulling, an insulating rod pulls the moving contact, maintaining engagement with the static contact. Continued effort separates the auxiliary contacts, creating an arc within the hood slit, which is extinguished by the arc cover as the current reaches zero, allowing for safe and effective operation.
Use and Standards
This exceptional product is designed for use in 10 to 35KV distribution lines, including branch lines and on the primary side of distribution transformers. It provides durable protection against overloads and short circuits, while allowing efficient separation and combination of the rated load current, ensuring reliable and stable power distribution.
The design of this product adheres to the JB/T8321-1996 standards for AC high-voltage fuse preparation, with product parameters aligning with the GB15166.3-1994 high voltage fuses Expulsion fuses standards. Where standards lack detail on critical parameters, modifications follow the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses, ensuring optimal performance and reliability.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are premier outdoor high-voltage protective devices. They connect with the incoming feeder of distribution transformers or lines, playing a critical role in safeguarding transformers and lines from short circuit incidents and overloads, while efficiently managing the on/off load current. These fuse cutouts are engineered with insulating insulator supports and a fuse tube, with static contacts fixed on both sides and moving contacts at the fuse tube ends. This robust design includes an internal arc-extinguishing tube and an outer phenolic compound paper or epoxy glass tube. The load switching fuse cutout features elastic auxiliary contacts and an arc-extinguishing enclosure for seamless on-off load current handling.
In normal operation, the fuse link ensures the fuse tube is tightly closed. Upon a fault, the fault current melts the fuse, generating an arc that heats the arc-extinguishing tube, releasing significant gas volumes, creating pressure, and elongating the arc across the tube. Once the fuse link melts, the moving contact loses tension, enabling the mechanism to unlock and the fuse tube to drop to an open position. For load switching, an insulating operating bar pulls the moving contact, initially maintaining engagement with the static contact. As the auxiliary contacts further separate, an electric arc forms, elongating within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to extinguish the arc as the current zeroes, ensuring safe and effective operation.
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 beacon of innovation and excellence within the electrical integration landscape. Proudly positioned as a cutting-edge high-tech enterprise, we operate with a highly experienced R&D, production, and service team, fortified by over 15 years of unwavering dedication and industry prowess.
Our comprehensive product suite features high-voltage solid-state soft starters, capacitor cabinets, and an extensive array of high and low voltage switchgear. At the forefront of technology, we offer state-of-the-art gas-insulated switchgear and robust substations. These high-performance solutions are indispensable across diverse sectors, including energy, chemicals, metal smelting, expansive electric power grids, and industrial manufacturing. We proudly serve prestigious universities, research institutions, and extend our impact into the medical and pharmaceutical realms. Our innovative solutions also empower municipal commerce, enhance water conservancy and hydropower projects, refine road traffic systems, and elevate both commercial and residential developments.
Firmly rooted in our unwavering commitment to technological innovation and the ethos of 'smart manufacturing,' we tirelessly attract and retain top technical talent to elevate our competitive edge. Our passion lies in delivering unmatched value to our clients while aspiring to craft the industry's most esteemed brand. Our journey, marked by relentless strides from our inception, is driven by a commitment to innovation and upheld by a modern business ethos that views quality as our cornerstone, market orientation, reputation-led development, and management-driven efficiency. We unwaveringly adhere to our guiding tenets: 'technology as the guide, standardized management, exceptional quality, and customer satisfaction.' These principles guide our quality and talent management strategies, striving to solidify our market presence. Our mission is to power China's electric and grid transmission and distribution fields with increasing vigor and ambition. At our core, integrity is non-negotiable, quality is inviolable, service is paramount, and customer satisfaction is our eternal creed. Our relentless pursuit of excellence, groundbreaking innovation, and dedication to building a trusted brand will never waver. Your recognition propels our advancement. We extend our heartfelt gratitude to all our loyal clients for their unwavering support and eagerly anticipate partnering with you to illuminate 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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