Product Description
General
The drop-out fuse and pull load drop-out fuse are essential, high-performance outdoor high-voltage protective devices, engineered to be the steadfast guardians of electrical systems. Strategically installed on the high-voltage side of distribution transformers or along distribution lines, these fuses deliver unparalleled protection against transformer and line short circuits and overloads, while efficiently managing open-circuit load currents. Their robust architecture is highlighted by an insulating bracket and fuse tubes; the static contact is securely mounted at each end of the insulation bracket, and the moving contact is positioned at the fuse tube's extremities. The fuse tube features a sophisticated configuration, with an inner arc tube encased by an outer phenolic paper tube or an epoxy glass cloth tube. Designed for superior operational performance, the pull load drop-out fuse is enhanced with nimble auxiliary contacts and an arc chute, which significantly boost its operational flexibility, especially when managing open or co-load currents.
During typical operations, the drop-out fuse remains closed, maintaining the fuse tube and fuse in a state of tension. When a system fault occurs, the fault current quickly melts the fuse, creating an arc. The intense heat of the arc generates a gas release from the arc tube, increasing the pressure inside the tube. This creates a vertical airflow along the pipeline, which skillfully stretches and lengthens the arc. As the fuse blows, the moving contact loses its tension, activating the locking mechanism, which subsequently releases the fuse tube, guiding it into the breaking position. For load pulling, an insulating rod is used to disengage the moving contact, initially keeping it connected with the static contact. Persistent pulling with the insulating rod causes the auxiliary contacts to detach, forming and elongating an arc within the hood slit. The gas from the arc cover aids the arc's extinction as the current approaches zero.
Use and Standards
This product dazzles with its ingenious design, expertly tailored for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It stands as a stalwart sentinel against overloads and short circuits, while masterfully handling the separation and union of rated load currents.
This product adheres to the highest standards, aligning with the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is meticulously crafted to comply with the rigorous GB15166.3-1994 high voltage fuses expulsion fuses standards. In cases where standards ambiguously define crucial parameters and configurations, precision adjustments are executed in accordance with the JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology.
Drop-out fuse cutouts and load switching fuse cutouts are indispensable for outdoor high voltage protection. Seamlessly incorporated into the incoming feeder of distribution transformers or distribution lines, they provide essential defense against short circuits and overloads, expertly managing on/off loading currents. The drop-out fuse cutout showcases insulate insulator supports and a fuse tube; static contacts are firmly placed on either side of the insulator support, with moving contacts resting at the ends of the fuse tube. The intricate design of the fuse tube includes an inner arc-extinguishing tube, enveloped by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout features robust elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring proficient management of on-off loading currents.
Under standard operating conditions, the fuse link ensures the fuse tube remains securely closed. When faults emerge, fault currents swiftly melt the fuse, creating an electric arc that heats the arc-extinguishing tube, releasing abundant gas. This high pressure propels the arc along the tube. Once the fuse link melts, the moving contact loses tension, triggering the lock mechanism, and the fuse tube drops out, transitioning the cutout to an open state. To switch off during cutout loading, operators use an insulating bar to pull the moving contact. At first, the main contact and auxiliary static contact remain engaged, but further pulling disengages the auxiliary contacts, generating an electric arc that elongates within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism releases gas, ensuring the arc is extinguished 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 excellence in the vast realm of electrical integration. Celebrated as a prestigious high-tech enterprise, we are unwaveringly devoted to innovation, powered by a distinguished team that excels in research and development, production, and service. With over 15 years of prolific experience, we are not just part of the industry; we are revolutionizing it, continually setting new benchmarks of excellence and redefining standards.
Our expansive product range is a true testament to our unwavering dedication to excellence. It features premium high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, and pioneering gas-insulated switchgear. Additionally, we offer state-of-the-art substations, all meticulously customized to fulfill the diverse needs of various industries. From the dynamic realms of energy and chemical sectors to the robust domains of metal smelting and extensive electric power grids, our solutions are reshaping capabilities. Our advanced offerings are also vital to industrial manufacturing, esteemed universities, pioneering research entities, and the thriving medical and pharmaceutical sectors. In municipal commerce, water conservancy and hydropower, road traffic systems, and a broad spectrum of commercial and residential areas, our products consistently deliver unparalleled reliability and efficiency.
At Zhejiang ChaoTai, our unwavering commitment to cutting-edge technological innovation and our forward-thinking 'smart manufacturing' philosophy propel us to attract the cream of technical talent. This empowers us to bolster our core competitiveness, delivering unmatched value to our clients while solidifying our stance as an industry leader. From our humble beginnings, we have embarked on an extraordinary growth journey, adopting a contemporary business model built on quality, market foresight, and meticulous management efficiency. Our ethos is rooted in prioritizing technology, adhering to standardized management, delivering exceptional quality, and ensuring customer satisfaction. Integrity is our foundation, quality our strength, and customer satisfaction our continuous mission. Our heartfelt gratitude extends to all our esteemed customers for their unwavering support and loyalty. Together with Senhang Technology, we are poised to forge a brighter future, step by step, hand in hand!
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}