Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are hallmark solutions for high-voltage outdoor protection, expertly engineered to safeguard distribution transformers and lines. Positioned with precision on the high-voltage side, they function as critical defense mechanisms against short circuits, overloads, and facilitate seamless current load transitions. Ingeniously constructed, the drop-out fuse features an insulating bracket with fuse tubes, static contacts at the bracket's ends, and moving contacts at the fuse tube ends. The fuse tube itself boasts an inner arc tube, complemented by an outer phenolic paper tube or epoxy glass cloth tube, ensuring durability and reliability. The Pull Load Drop-out Fuse elevates operational flexibility, incorporating auxiliary contacts and an arc chute for superior performance in current load operations.
In routine operations, the drop-out fuse remains securely closed, with the tube held under tension. Upon system failure, the fault current rapidly disrupts the fuse, creating an arc that ignites the arc tube. This process decomposes a significant amount of gas, building high pressure and forming a vertical wind path, efficiently stretching the arc. As the fuse blows, the moving contact releases and rotates outward, enabling the fuse tube to drop into a breaking position. For load operations, an insulating rod is used to manipulate the moving contact, maintaining engagement with the static contact. Continued effort separates the auxiliary contacts, forming an arc that stretches within the hood slit. The arc cover, designed to contain gas, aids in extinguishing the arc as the current reaches zero.
Use and Standards
This superior product is crafted for application in 10 to 35KV distribution networks, including branch lines and primary transformer sides. It delivers robust protection against overloads and short circuits, while proficiently managing the separation and combination of rated load currents.
Meticulously crafted, this product aligns with JB/T8321-1996 AC high-voltage fuse preparation standards. It adheres to GB15166.3-1994 high voltage fuses Expulsion fuses standards, with additional adjustments following JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses where necessary standards are not specified.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are elite outdoor high-voltage protective devices. Designed for seamless integration with incoming feeders of transformers or lines, they are indispensable in protecting against short circuits and overloads while efficiently managing on/off load current. The drop-out fuse cutout includes insulating supports, fuse tubes, static contacts on both insulator sides, and moving contacts at the tube ends. The fuse tube integrates an internal arc-extinguishing tube, paired with an outer phenolic paper or epoxy glass tube. The load switching fuse cutout incorporates enhanced elastic auxiliary contacts and an arc-extinguishing enclosure for smooth load current switching.
In standard operations, the fuse link ensures the fuse tube is securely closed. Upon faults, the fault current melts the fuse, forming an arc that heats the arc-extinguishing tube, releasing gas to elongate the arc. Once the fuse link melts, the moving contact loses tension, allowing the mechanism to unlock and the fuse tube to drop into an open position. For cutout load switching, operators use an insulating rod to manipulate the moving contact, initially keeping the main contact engaged with the static contact. As the auxiliary contact is pulled further, an arc forms and stretches within the arc-extinguishing enclosure. The arc-extinguishing mechanism then expels gas to extinguish the arc as the current reaches 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
Zhejiang Chaotai Complete Equipment Co., Ltd. stands as a beacon of innovation and excellence within the world of electrical integration. As a vibrant high-tech enterprise, we proudly showcase an experienced team in R&D, production, and service, all fueled by over 15 years of industry dedication and expertise.
Our extensive product array encompasses high-voltage solid-state soft starters, versatile capacitor cabinets, both high and low voltage switchgear, advanced gas-insulated switchgear, and resilient substations. These high-caliber products serve a multitude of sectors, including energy and chemical industries, metal smelting, expansive electric power grids, industrial manufacturing, and prestigious universities and research institutions. Moreover, our solutions fortify the medical and pharmaceutical fields, support municipal commerce, enhance water conservancy and hydropower endeavors, optimize road traffic networks, and enrich both commercial and residential developments.
Driven by an unwavering commitment to technological innovation and the philosophy of 'smart manufacturing,' we actively seek top-tier technical talent to elevate our company's core competitive strengths comprehensively. Our dedication lies in delivering unmatched value to our clients and aspiring to create the industry's most esteemed brand. Since our inception, our relentless journey has been marked by a dedication to innovation and a modern business ethos that emphasizes quality as our lifeline, market orientation, reputation-driven growth, and management-led efficiency. We adhere strictly to our guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in quality and technical talent management, working diligently to enhance our market presence. Our mission is to serve China's electric power and grid transmission and distribution sectors with vigor, speed, and ambition. At our core, integrity is paramount, quality is sacred, service is king, and customer satisfaction is our eternal creed. Our ceaseless pursuit of excellence, continuous innovation, and commitment to building a trustworthy brand guide us forward. Your recognition is the driving force behind our progress. We extend heartfelt gratitude to all our loyal clients for their ongoing support, and Zhejiang Chaotai Complete Equipment Co., Ltd. looks forward to 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}