Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse exemplify the pinnacle of outdoor high-voltage electrical protection. Expertly engineered, these devices are deftly positioned on the high-voltage side of distribution transformers or serve as essential support links in distribution lines. They function as vital protectors against transformer and line short circuits, overload conditions, and ensure seamless current opening and loading operations. Ingeniously designed, the drop-out fuse consists of an insulating bracket and fuse tubes, with static contacts firmly attached at each end and moving contacts elegantly extending from the ends of the fuse tube. The fuse tube's structure boasts a refined inner arc tube complemented by a robust outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse distinguishes itself with superior flexibility, featuring auxiliary contacts and an arc chute meticulously crafted for smooth current load operations.
Under standard operations, the drop-out fuse remains firmly locked in a closed stance, with the fuse tube maintained in optimal tension. Upon detecting system faults, the fault current acts with precision, blowing the fuse and initiating an arc. This potent arc ignites the arc tube, decomposing substantial gas volumes and generating high pressure to create a vertical wind path that skillfully stretches and elongates the arc. As the fuse blows, the moving contact disengages, rotating smoothly outwards while the locking mechanism releases, allowing the fuse tube to drop and attain a decisive breaking position. When load pulling becomes necessary, an insulating rod is employed to draw out the moving contact while maintaining its connection with the static contact. With continued force application, auxiliary contacts separate, generating an arc between them that stretches within the hood slit. The arc cover expertly contains the gas, facilitating efficient arc extinguishment as current reaches zero.
Applications and Compliance Standards
This distinguished product is precisely crafted for use in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It offers unwavering protection against overloads and short circuits while enabling effective separation and combination of the rated load current.
The meticulously crafted design of this product adheres to the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters are perfectly aligned with the esteemed GB15166.3-1994 standards for high voltage fuses, specifically Expulsion fuses. In cases where detailed definitions are absent, refinements are 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 proudly as the premier outdoor high-voltage protective devices. Intentionally designed to seamlessly integrate with the incoming feeder of distribution transformers or lines, they serve a crucial role in shielding transformers and lines from short circuit events and overload conditions while capably managing the on/off load current. The drop-out fuse cutout features robust insulating insulator supports and a fuse tube, with static contacts securely positioned on both sides and moving contacts expertly installed at the ends of the fuse tube. The fuse tube showcases a sophisticated internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also incorporates advanced, elastic auxiliary contacts and an arc-extinguishing enclosure for efficient on-off load current switching.
In typical operational scenarios, the fuse link ensures that the fuse tube remains securely closed. Upon encountering faults, the fault current swiftly melts the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing substantial gas volumes and creating high pressure to elongate the arc within the tube. After melting, the moving contact loses its tension, enabling the mechanism to lock and the fuse tube to drop out, transitioning to an open position. For cutout load switching, 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 pulled, an electric arc forms between them, elongating within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to efficiently 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
Zhejiang ChaoTai Complete Equipment Co., Ltd. is a shining testament to groundbreaking innovation and unmatched excellence in the realm of electrical integration. As a dynamic high-tech enterprise, we boast an elite team in R&D, production, and service, fortified by over 15 years of steadfast dedication and expertise in the industry.
Our extensive array of products includes high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and durable substations. These top-tier offerings are vital across a multitude of sectors—serving energy, chemical industries, and metal smelting. Our products power expansive electrical grids, boost industrial manufacturing, and support elite universities and research institutions. Additionally, our solutions empower the medical and pharmaceutical fields, bolster municipal commerce, refine water conservation and hydropower initiatives, streamline road traffic systems, and enhance both commercial and residential developments.
Guided by a dedication to technological innovation and the ethos of 'smart manufacturing,' we are committed to attracting elite technical talent to robustly amplify our core competitive edge. Our unwavering focus is on delivering unparalleled value to our clients, aspiring to forge the industry's most admired brand. From inception, our relentless journey toward excellence is driven by innovation and a contemporary business spirit, where quality is paramount, market direction is pivotal, reputation-fueled growth is essential, and efficiency is achieved through strategic management. We firmly adhere to the principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in talent and quality management, diligently expanding our market footprint. Our mission is to serve China's electric power and grid sectors with agility, force, and ambition. At our core, integrity is sacrosanct, quality is sacred, service reigns supreme, and customer satisfaction is our timeless creed. Our unyielding quest for excellence, relentless innovation, and commitment to crafting a trustworthy brand remain at our heart. Your recognition inspires our journey forward. We extend our deepest gratitude to our loyal clients for their enduring support and eagerly anticipate partnering 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.
Audited Supplier 
){kind=link}