Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are integral outdoor high-voltage protection devices designed to safeguard electrical systems. Positioned strategically on the high-voltage side of the distribution transformers or within distribution line links, these fuses provide robust protection against short circuits and overloads, ensuring seamless current interruption when necessary. The construction of the drop-out fuse includes an insulating bracket and fuse tubes. Static contacts are mounted at the ends of the bracket, while moving contacts are affixed to the ends of the fuse tube. The fuse tube itself is a sophisticated assembly, comprising an inner arc tube enveloped by an outer shell made of a phenolic paper tube or epoxy glass cloth tube. For enhanced operational flexibility, the pull load drop-out fuse incorporates auxiliary contacts and an arc chute, facilitating efficient current interruption and load management.
Under normal conditions, the drop-out fuse maintains a closed position with the fuse tube held in tension. In the event of a system failure, the fault current swiftly melts the fuse, initiating an arc. This arc ignites the arc tube, releasing a substantial volume of gas and generating high pressure within the tube. This pressure propels a vertical draft along the pipeline, effectively stretching and elongating the arc. Once the fuse has blown, the moving contact loses its tension and pivots outwards, triggering the locking mechanism to release the fuse tube, which then drops to indicate a breaking position. When load interruption is required, an insulating rod is used to disengage the moving contact. At this stage, the moving and static contacts remain in contact. Further pulling with the insulating rod separates the auxiliary contacts, causing an arc to form between them. This arc is stretched within the hood slit, where gas is present to extinguish it as the current approaches zero.
Use and Standards
This product is essential for 10 to 35KV distribution lines and the primary side of distribution transformers, offering superior overload and short circuit protection. It efficiently separates and combines with the rated load current, ensuring a reliable performance.
Our product model adheres to the JB/T8321-1996 standards for AC high-voltage fuses. The product parameters are developed in accordance with GB15166.3-1994 standards for high voltage expulsion fuses. While these standards outline most parameters, any ambiguities are addressed using JB/DQ2139-1986 interim technological guidelines for 10 to 35KV outdoor high voltage drop fuses, ensuring precision and compliance.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are high-voltage protective devices intended for outdoor use. They connect with incoming feeders of distribution transformers or lines, providing essential protection against short circuits and overloads while managing on/off load current. The cutout features insulative support and a fuse tube, with static contacts fixed to the insulator support's sides and moving contacts attached to the fuse tube ends. The fuse tube includes an inner arc-extinguishing tube, with an outer layer made from phenolic compound paper or an epoxy glass tube. The load switching fuse cutout enhances functionality with enforced elastic auxiliary contacts and an arc-extinguishing enclosure for efficient current management.
In normal operation, the fuse link secures the fuse tube in a closed position. If a fault occurs, the fault current immediately melts the fuse link, generating an electric arc. This arc energizes the arc-extinguishing tube, releasing gases that create high pressure and blow the arc along the tube. Once the fuse link melts, the moving contact loses its strength, allowing the mechanism to lock and the fuse tube to drop out, indicating an open position. For load switching, an operator uses an insulating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged. As the auxiliary contact is pulled apart, an electric arc forms, which is extended within the arc-extinguishing enclosure gap. The arc is extinguished as the current passes through zero, aided by the gas released to extinguish the arc.
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 leading high-tech enterprise in the realm of electrical integration. Backed by more than 15 years of rich industry experience, our professional team spearheads R&D, production, and exceptional service.
Our distinguished product lineup features high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, gas-insulated switchgear, and state-of-the-art substations. Our innovations power a wide array of sectors, including energy, chemical industries, metal smelting, electric power grids, industrial manufacturing, academia, medical and pharmaceutical sectors, municipal commerce, water conservancy and hydropower, road infrastructure, as well as commercial and residential domains.
Embracing a philosophy of 'smart manufacturing' and unwavering technological advancement, we actively recruit elite technical talent to bolster our core competitiveness. Our commitment is to deliver unparalleled value to our customers, aspiring to establish a preeminent brand in the industry. Since our inception, we've transitioned from humble beginnings to a pinnacle of excellence. Innovation drives us as we uphold a modern business ethos: quality as the cornerstone of survival, market demands guide our path, reputation fuels our development, and efficient management ensures our progress. Our mission remains steadfast: guided by technology, governed by standards, promising superior quality, and ensuring customer delight. We aim to elevate the electrical transmission and distribution networks of China with unmatched speed, strength, and ambition. Integrity forms our foundation, quality reigns supreme, service is paramount, and customer satisfaction is our perpetual goal. Pursuing excellence and fostering innovation, we are dedicated to building a reputable brand. Your trust and recognition empower us. We extend heartfelt gratitude to all our patrons, both new and long-standing, for their unwavering support. Zhejiang Chaotai looks forward to forging a prosperous future together with you.
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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