Product Description
General
The drop-out fuse and pull load drop-out fuse are premier outdoor high-voltage protective solutions for electrical systems. Strategically positioned on the high-voltage side of distribution transformers or as vital links in distribution lines, they ensure robust protection against short circuits and overloads, while facilitating seamless opening and closing of co-load currents. Comprising a durable insulating bracket and fuse tubes, these fuses are engineered with static contacts at each end of the insulation bracket and moving contacts at both ends of the fuse tube. The fuse tube itself is a sophisticated construct of an inner arc tube paired with an outer layer made from either phenolic paper or epoxy glass cloth. The pull load drop-out fuse is enhanced with flexible auxiliary contacts and an arc chute, optimizing its performance in managing co-load currents.
In standard operations, the fuse tube of the drop-out fuse is securely closed under the tension of the fuse. When a fault occurs, the fault current swiftly triggers the fuse to blow, creating an arc. The arc's intense heat causes the arc tube to decompose and release large volumes of gas, creating high pressure within the tube and generating a powerful vertical wind along the pipeline. This mechanism stretches and elongates the arc to extinguish it rapidly. After blowing the fuse, the moving contact loses tension and rotates outward, unlocking the mechanism and releasing the fuse tube, which then drops into the breaking position. When manually pulling the load, an insulating rod is used to disengage the moving contact. Initially, the moving and static contacts remain connected. Continued pulling separates the auxiliary contacts, an arc forms between them, and stretches within the arc cover slit. The gas-filled arc cover extinguishes the arc as the current reaches zero.
Use and Standards
This innovative product is expertly designed for use in 10 ~ 35KV distribution lines and branching lines, as well as on the primary side of distribution transformers, offering unmatched overload and short circuit protection. It is adept at safely separating and combining rated load currents, ensuring the integrity and reliability of your power distribution system.
The product is meticulously crafted according to the JB/T8321-1996 method for AC high-voltage fuses, with product parameters aligned with the GB15166.3-1994 expulsion fuses standards. While these standards do not define certain critical parameters and configurations, adjustments are made in compliance with the JB/DQ2139-1986 interim technology requirements for 10 ~ 35KV outdoor high voltage drop fuses, reflecting the latest in technological advancements.
Drop-out fuse cutouts and load switching fuse cutouts are indispensable outdoor high-voltage protective devices. They connect seamlessly with the incoming feeder of distribution transformers or distribution lines. These devices are crucial for protecting transformers or lines from short circuits and overloads while efficiently managing on/off loading currents. Each drop-out fuse cutout is composed of resilient insulator supports and a robust fuse tube, static contacts securely fixed on both sides of the insulator support, and moving contacts installed on the fuse tube's ends. The fuse tube boasts an innovative design with an interior arc-extinguishing tube and an exterior layer of phenolic compound paper or epoxy glass tube. The load switching fuse cutout is further enhanced with enforced elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring reliable on-off loading current management.
Under normal operation, the fuse link tightens the fuse tube into a secure closed position. Upon system faults, the ensuing fault current melts the fuse link, igniting an electric arc. This causes the arc-extinguishing tube to heat up and release copious amounts of gas, generating high pressure and creating airflow along the tube. Once the fuse link melts, the moving contact loses its tension, locking the mechanism and causing the fuse tube to drop, resulting in an open position. When it is necessary to switch off during cutout loading, an operator uses an insulating operating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain connected. As pulling continues, the auxiliary contact separates, an electric arc forms between auxiliary contacts, and elongates within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing process releases 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 in the realm of electrical integration. As a high-tech enterprise, we boast a specialized team of research, development, production, and service professionals, each bringing over 15 years of invaluable experience to the table. Our commitment to pioneering advancements in technology positions us at the forefront of the industry.
Our product portfolio is as diverse as it is advanced, featuring high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, and cutting-edge gas-insulated switchgear. We also offer state-of-the-art substations. Our products have earned a reputation for reliability and performance, making them indispensable across a myriad of sectors, including the burgeoning energy and chemical industries, dynamic metal smelting, expansive electric power grids, and the robust industrial manufacturing sector. Furthermore, we serve the academic community, research institutions, the medical and pharmaceutical fields, and cater to municipal commerce, water conservancy, hydropower, road traffic, as well as commercial and residential areas. Our widespread application is a testament to the trust and efficacy our products deliver.
At Zhejiang ChaoTai, we are passionate advocates of technological innovation and adhere to a philosophy of 'smart manufacturing.' Our strategy involves attracting top-tier technical talents to bolster our core competencies, ensuring our offerings remain unrivaled in value. Our journey from inception to excellence has been marked by progress and innovation, transforming from a startup to a leader in quality and reputation. We are relentless in our pursuit to be the best in the industry, adhering to a path where quality ensures survival, reputation drives development, and efficiency is achieved through meticulous management. Our guiding principles are simple yet profound: technology is our beacon, standardized management our framework, quality our assurance, and customer satisfaction our ultimate goal. Integrity, quality, and service form the bedrock of our ethos, with customer satisfaction being our perpetual pursuit. Our unwavering commitment to excellence fuels continuous innovation as we build a brand synonymous with trust. Your recognition is our motivation, and we extend heartfelt gratitude to all our esteemed clients for their enduring support. Together with Senhang Technology, we are excited to collaborate with you in shaping a brighter future.
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}