Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse stand as the epitome of outdoor high-voltage electrical protection solutions. These devices are strategically installed either on the high-voltage side of distribution transformers or serve as vital support links within distribution lines. They provide indispensable protection against transformer and line short circuits, overload conditions, and allow for the seamless opening and co-loading of current. Ingeniously crafted, the drop-out fuse uses an insulating bracket and fuse tubes, with static contacts secured at each end of the bracket and moving contacts affixed to the fuse tube. The fuse tube design incorporates an inner arc tube along with an outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse offers elevated operational flexibility with auxiliary contacts and an arc chute, engineered for smooth current load operations.
Under normal operational circumstances, the drop-out fuse is firmly held in a closed state, with the fuse tube tensioned. In the event of a system fault, the fault current instantaneously blows the fuse, generating an arc that ignites the arc tube. This reaction decomposes large volumes of gas, creating high pressure within the tube and initiating a vertical wind path. This extraordinary mechanism rapidly elongates and stretches the arc. Post-blow, the moving contact releases tension, rotates outwards, and the locking mechanism disengages, enabling the fuse tube to drop into a breaking position. For load pulling, an insulating rod is used to draw the moving contact, maintaining engagement with the static contact. As effort continues, the auxiliary contacts part ways, forming an arc that is drawn within the hood slit. The arc cover, which contains gas, aids in arc extinguishment as the current reaches zero, ensuring safety and reliability.
Use and Standards
This exceptional product is meticulously designed for use in 10 to 35KV distribution lines, including branching lines and on the primary side of distribution transformers. It delivers robust protection against overloads and short circuits, simultaneously enabling efficient separation and amalgamation of the rated load current, ensuring optimal performance in diverse conditions.
The meticulous design of this product strictly adheres to the JB/T8321-1996 Method for AC high-voltage fuse preparation, while the product parameters are in line with GB15166.3-1994 high voltage fuses Expulsion fuses standards. Where details on critical parameters and configurations are sparse, modifications are made in accordance with the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses, ensuring cutting-edge performance and adherence to the highest safety standards.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are premier devices designed for outdoor high-voltage protection. They seamlessly connect to the incoming feeder of distribution transformers or lines, playing a pivotal role in protecting transformers and lines from short circuit incidents and overload conditions, while proficiently managing the on/off load current. The drop-out fuse cutout consists of insulating insulator supports and a fuse tube, with static contacts firmly mounted on both sides of the insulator support and moving contacts situated at the ends of the fuse tube. The fuse tube is engineered with an internal arc-extinguishing tube and an outer phenolic compound paper or epoxy glass tube. The load switching fuse cutout also features elastic auxiliary contacts and an arc-extinguishing enclosure for efficient on-off load current management.
In standard operational scenarios, the fuse link ensures the fuse tube is securely tightened, maintaining a closed configuration. Upon fault detection, the fault current immediately melts the fuse, generating an electric arc. This causes the arc-extinguishing tube to heat and release a substantial volume of gas, producing high pressure and elongating the arc throughout the tube. Once the fuse link melts, the moving contact loses tension, allowing the mechanism to unlock and the fuse tube to drop out, switching to an open state. For load switching during cutout, operators utilize an insulating operating bar to pull 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, which extends within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism releases gas to extinguish the arc as the current transitions through zero, ensuring efficient and safe operations.
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 in the field of electrical integration. As a dynamic high-tech enterprise, we are backed by a highly experienced R&D, production, and service team with over 15 years of dedicated expertise in the industry.
Our diverse product range is an embodiment of technological prowess, featuring high-voltage solid-state soft starters, advanced capacitor cabinets, both high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and robust substations. These high-performance solutions cater to a wide spectrum of sectors, including the energy and chemical industries, metal smelting operations, expansive electric power grids, industrial manufacturing, and prominent universities and research institutions. Moreover, our innovative solutions empower the medical and pharmaceutical industries, support municipal commerce, enhance water conservancy and hydropower projects, optimize road traffic systems, and contribute to commercial and residential developments.
Firmly anchored in our unwavering commitment to technological innovation and the philosophy of "smart manufacturing," we strive to attract and nurture top-tier technical talent to enhance our company's core competitive edge. Our dedication to delivering unmatched value to our clients fuels our aspiration to become the most esteemed brand in the industry. Since our inception, we have embarked on a relentless journey from our beginnings to the pinnacle of excellence. Guided by a modern business ethos, we emphasize 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 our quality and technical talent management practices, diligently working to expand our market footprint. Our mission is to advance 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 is paramount, and customer satisfaction remains our eternal creed. Our relentless pursuit of excellence, continuous innovation, and commitment to building a trustworthy brand are our guiding principles. Your recognition is the driving force behind our progress. We extend our heartfelt gratitude to all our loyal clients for their unwavering support, and Zhejiang Chaotai 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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