Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse stand as paramount solutions in outdoor high-voltage electrical protection realms. These sophisticated devices are meticulously positioned on the high-voltage side of distribution transformers or as vital components in distribution lines. They offer unparalleled protection against transformer and line short circuits, overload conditions, and facilitate the seamless opening and co-loading of currents. Ingeniously crafted, the drop-out fuse incorporates an insulating bracket and fuse tubes, with the static contacts expertly affixed at both ends of the bracket, while the moving contacts are attached at the ends of the fuse tube. The fuse tube construction features an inner arc tube coupled with an outer phenolic paper tube or epoxy glass cloth tube, ensuring durability and reliability. The Pull Load Drop-out Fuse takes flexibility to a new level, boasting auxiliary contacts and an arc chute, purposefully designed for smooth current load operations.
During typical operations, the drop-out fuse is reliably maintained in a closed position with the fuse tube precisely tensioned. In the event of a malfunction, the fault current promptly blows the fuse, generating an arc that ignites the arc tube. This event triggers a decomposition process, releasing large gas volumes, creating high pressure within the tube, and forging a vertical wind path that intriguingly stretches and elongates the arc. Once the fuse is blown, the moving contact releases its tension and rotates outwards, while the locking mechanism disengages, allowing the fuse tube to gracefully drop, achieving a breaking position. Should it be necessary to pull the load, an insulating rod is adeptly used to pull the moving contact, maintaining its engagement with the static contact. With continued effort, the auxiliary contacts separate, forming an arc between them, which stretches within the hood slit. The arc cover, rich with gas, assists in extinguishing the arc as the current reaches zero, ensuring a safe and efficient operation.
Use and Standards
This prestigious product is expertly engineered for deployment in 10 to 35KV distribution lines, including branching lines and on the primary side of distribution transformers. It delivers exceptional protection against overloads and short circuits while enabling the efficient separation and combination of the rated load current, ensuring uninterrupted power delivery and safety.
The comprehensive and meticulous design of this product strictly adheres to the JB/T8321-1996 Method for AC high-voltage fuse preparation. Furthermore, the product parameters align with GB15166.3-1994 high voltage fuses Expulsion fuses standards. In instances where standards lack detailed definitions of critical parameters and configurations, adjustments are expertly made in accordance with the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses, guaranteeing precision and reliability.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are the epitome of outdoor high-voltage protective devices. Designed with precision to connect with the incoming feeder of distribution transformers or lines, they play an indispensable role in safeguarding transformers and lines from short circuit incidents and overload conditions while efficiently managing on/off load current. The drop-out fuse cutout is composed of insulating insulator supports and a fuse tube, with static contacts strategically fixed on both sides of the insulator support and moving contacts precisely installed at the ends of the fuse tube. The fuse tube showcases an internal arc-extinguishing tube alongside an outer phenolic compound paper tube or epoxy glass tube, ensuring superior protection. The load switching fuse cutout is enhanced with enforced elastic auxiliary contacts and an arc-extinguishing enclosure for proficient on-off load current switching, maximizing performance and safety.
In normal operational scenarios, the fuse link guarantees that the fuse tube is securely tightened to maintain a closed position. When faults arise, the fault current causes the fuse to melt immediately, generating a dynamic electric arc. This action heats the arc-extinguishing tube, releasing a substantial volume of gas, creating high pressure, and elongating the arc along the tube. Once the fuse link melts, the moving contact loses its tension, allowing the mechanism to unlock and the fuse tube to gracefully drop out, switching to an open position. For load switching during cutout, operators employ an insulating operating bar to skillfully pull the moving contact. Initially, the main contact maintains engagement with the auxiliary static contact. As the auxiliary contact is further pulled, an electric arc forms between the auxiliary contacts, elongating within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to extinguish the arc as the current passes through zero, ensuring a 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 an embodiment of cutting-edge innovation and unparalleled excellence in the illustrious field of electrical integration. As a high-tech enterprise with dynamic capabilities, we pride ourselves on our illustrious R&D, production, and service teams, honed and enriched by over 15 years of dedicated expertise in the industry.
Our extensive range of products showcases our engineering prowess, including high-voltage solid-state soft starters, premium capacitor cabinets, versatile high and low voltage switchgear, and state-of-the-art gas-insulated switchgear, alongside sturdy substations. These high-performance solutions are indispensable across a multitude of sectors, providing vital support to the energy and chemical landscapes, metal smelting processes, expansive electric power grids, and industrial manufacturing arenas. Furthermore, our technologies empower distinguished universities and research institutions, invigorate the medical and pharmaceutical industries, underpin municipal commerce, enhance water conservancy and hydropower undertakings, streamline road traffic systems, and elevate both commercial and residential development initiatives.
With an unwavering commitment to technological innovation and the philosophy of 'smart manufacturing,' we dedicate ourselves to attracting top-tier technical talent, thereby elevating our company's core competitive strengths holistically. Our fervent dedication to delivering exceptional value to clients drives our aspiration to create the industry's most respected brand. Our journey from inception to excellence is marked by relentless progress, guided by a modern business ethos that treasures quality as our lifeline, and market orientation as our compass, with development driven by reputation and management-fueled efficiency. We are resolute in our adherence to the philosophy of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction,' which serves as the cornerstone of our quality and technical talent management, reinforcing our presence in the market. Our mission is to serve China's electric power and grid transmission and distribution sectors with unparalleled speed, power, and ambition. At our core, we uphold integrity as non-negotiable, quality as sacred, service as supreme, and customer satisfaction as our eternal creed. Our relentless pursuit of excellence, continuous innovation, and unwavering dedication to establishing a trustworthy brand continue to shape our guiding principles. Your recognition is the catalyst that propels our progress. We extend our sincerest gratitude to all our loyal clients for their steadfast support, and we eagerly anticipate collaborating with you 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.
Audited Supplier 
){kind=link}