Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are the epitome of cutting-edge solutions for outdoor high-voltage electrical protection. These devices are expertly designed to be strategically placed on the high-voltage side of distribution transformers or serve as vital links in distribution lines. Acting as the frontline defense, they provide crucial protection against transformer and line short circuits and overload conditions while facilitating the seamless opening and co-loading of current. Ingeniously crafted, the drop-out fuse comprises an insulating bracket and fuse tubes, with securely placed static contacts at both ends of the bracket accompanied by moving contacts at the ends of the fuse tube. The innovative construction of the fuse tube features an inner arc tube paired with an outer phenolic paper tube or epoxy glass cloth tube. Exemplifying enhanced flexibility, the Pull Load Drop-out Fuse includes auxiliary contacts and an arc chute designed specifically for effortless current load operations.
In typical operations, the drop-out fuse is steadfastly held in a closed position with the fuse tube being taut. Upon the occurrence of a system fault, the fault current rapidly melts the fuse, producing an arc. This arc ignites the arc tube, initiating the decomposition of large gas volumes, which in turn generate high pressure inside the tube and create a vertical wind path. This extraordinary mechanism extends and elongates the arc rapidly. Following the blowing of the fuse, the moving contact releases its tension, rotating outward as the locking mechanism disengages, allowing the fuse tube to fall to a breaking position. When load pulling is necessary, an insulating rod is utilized to draw out the moving contact, ensuring contact with the static contact. As the effort continues, the auxiliary contacts separate, forming an arc between them that stretches within the hood slit. The arc cover, containing gas, aids in extinguishing the arc as current approaches zero.
Use and Standards
This esteemed product is meticulously crafted for application in 10 to 35KV distribution lines, encompassing branching lines and the primary side of distribution transformers. It provides unwavering protection against overloads and short circuits while enabling the efficient separation and combination of the rated load current.
The meticulous design of this product adheres rigorously to the JB/T8321-1996 Method for AC high-voltage fuse preparation, ensuring reliability and safety. Product parameters are in full compliance with GB15166.3-1994 high voltage fuses Expulsion fuses standards. In situations where standards lack detailed parameter definitions and configurations, adjustments are deftly 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. Crafted to seamlessly interface with the incoming feeder of distribution transformers or lines, they play a pivotal role in shielding transformers and lines from short circuit incidents and overload conditions while adeptly managing on/off load current. The drop-out fuse cutout comprises insulating insulator supports and a fuse tube, with static contacts securely affixed on both sides of the insulator support and moving contacts meticulously installed at the ends of the fuse tube. The fuse tube boasts an internal arc-extinguishing tube along with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is further enhanced with elastic auxiliary contacts and an arc-extinguishing enclosure for efficient on-off load current switching.
In standard operational scenarios, the fuse link ensures the fuse tube is taut to maintain a closed position. When faults occur, the fault current instantly melts the fuse, generating an electric arc. This heats the arc-extinguishing tube, releasing a substantial volume of gas to create high pressure and elongate the arc throughout the tube. Once the fuse link melts, the moving contact loses tension, allowing the mechanism to lock and the fuse tube to drop out, switching to an open position. For load switching during cutout, operators must skillfully use 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 pulled, an electric arc forms between the auxiliary contacts, which elongates within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism 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
At Zhejiang Chaotai Complete Equipment Co., Ltd., we define the apex of innovation and excellence in electrical integration. As a forward-thinking high-tech enterprise, we pride ourselves on a seasoned team of R&D, production, and service experts, enriched by over 15 years of dedicated industry expertise, poised to deliver exceptional value.
Our comprehensive array of products includes high-voltage solid-state soft starters, capacitor cabinets, advanced high and low voltage switchgear, cutting-edge gas-insulated switchgear, and resilient substations. These high-performance offerings are pivotal across diverse sectors such as the energy and chemical industries, metal smelting, expansive electric power grids, and industrial manufacturing. Our solutions also empower esteemed universities and research institutions, the medical and pharmaceutical sectors, municipal commerce, water conservancy, and hydropower projects. Additionally, we enhance road traffic systems and enrich commercial and residential developments through our superior products.
Built on an unwavering commitment to technological innovation and the philosophy of 'smart manufacturing,' we tirelessly attract top-tier technical talent to elevate our core competitive edge. Our devotion to delivering unmatched value is unwavering as we strive to establish ourselves as the industry's most esteemed brand. From inception to excellence, our journey is marked by relentless strides, driven by an innovative business ethos that champions quality as our lifeline, market alignment, reputation-driven growth, and management-led efficiency. Guided by our commitment to 'technology as the guide, standardized management, exceptional quality, and customer satisfaction,' we diligently enhance our market presence. Our mission is to serve China's electric power and grid transmission and distribution domains with increasing speed, strength, and ambition. At our core, integrity is non-negotiable, quality is sacrosanct, service reigns supreme, and customer satisfaction is our eternal creed. Our relentless pursuit of excellence, continuous innovation, and dedication to building a trustworthy brand are the principles that guide us. Your recognition propels us forward. We express our deepest gratitude to all our loyal clients for their enduring support and eagerly anticipate collaborating to create 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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