Product Description
General
The drop-out fuse and pull load drop-out fuse are essential outdoor high-voltage protective devices, expertly crafted to safeguard electrical systems. Positioned on the high-voltage side of distribution transformers or within distribution lines, these fuses offer robust protection against transformer and line short circuits and overloads, while effectively managing open-circuit load currents. Their durable construction includes an insulating bracket and robust fuse tubes; the static contact is securely anchored at each end of the insulation bracket, with the moving contact strategically placed at the fuse tube's ends. The fuse tube boasts an ingenious inner arc tube, encased by either an outer phenolic paper tube or an epoxy glass cloth tube. Designed for superior performance, the pull load drop-out fuse features agile auxiliary contacts and an arc chute, significantly enhancing its operational flexibility, especially during the handling of open or co-load currents.
In normal operations, the drop-out fuse remains closed, maintaining the fuse tube and fuse under tension. When a fault occurs, the fault current rapidly melts the fuse, creating a powerful arc. The arc's intense heat generates an outpouring of gas from the arc tube, increasing the pressure within the tube. This process initiates a vertical airflow along the pipeline, expertly stretching and elongating the arc. As the fuse blows, the moving contact loses tension, activating the locking mechanism, which releases the fuse tube and guides it into the open position. For load switching, an insulating rod is used to disengage the moving contact, initially keeping its connection with the static contact. Continued pulling with the insulating rod causes the auxiliary contacts to separate, forming and extending an arc within the hood slit. The arc cover's gas aids in extinguishing the arc as the current approaches zero.
Use and Standards
This product, designed with innovation, is perfect for 10 ~ 35KV distribution lines, branch lines, and the primary sides of distribution transformers. It serves as a stalwart protector against overloads and short circuits, while adeptly handling the separation and union of rated load currents.
In line with top-tier standards, the product model conforms to 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 essential parameters and configurations, precision adjustments are executed in accordance with JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology.
Drop-out fuse cutouts and load switching fuse cutouts are pivotal for outdoor high voltage protection. Seamlessly integrated into the incoming feeder of distribution transformers or distribution lines, they offer essential defense against short circuits and overloads, competently managing on/off loading currents. The drop-out fuse cutout features insulated insulator supports and a fuse tube; static contacts are securely positioned on either side of the insulator support, with moving contacts resting at the ends of the fuse tube. The sophisticated 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 flaunts robust elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring proficient management of on-off loading currents.
Under standard operating conditions, the fuse link keeps the fuse tube securely closed. When faults arise, fault currents swiftly melt the fuse, creating an electric arc that heats the arc-extinguishing tube, releasing copious gas. The high pressure propels the arc along the tube. Once the fuse link melts, the moving contact loses tension, activating the mechanism to lock, 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 disengage the moving contact. Initially, 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 within the dynamic world of electrical integration. Recognized as a prestigious high-tech enterprise, we are passionately committed to innovation, supported by a distinguished team renowned for their expertise in R&D, production, and service. With over 15 years of invaluable experience, we are transforming the industry landscape and redefining standards of excellence.
Our extensive product range highlights our unwavering dedication to excellence, showcasing premium high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, and pioneering gas-insulated switchgear. We proudly offer state-of-the-art substations, all meticulously designed to cater to the diverse demands of various industries. From the dynamic sectors of energy and chemicals to the robust fields of metal smelting and expansive electric power grids, our solutions elevate industry capabilities. Our advanced offerings are also essential to industrial manufacturing, esteemed universities, pioneering research institutions, as well as the thriving medical and pharmaceutical sectors. In municipal commerce, water conservancy, hydropower, road traffic systems, and a wide spectrum of commercial and residential arenas, our products deliver unparalleled reliability and efficiency.
At Zhejiang ChaoTai, our steadfast commitment to technological innovation and our forward-thinking 'smart manufacturing' philosophy propel us to attract top-tier technical talent. This empowers us to amplify our core competitiveness, providing exceptional value to our clients while reinforcing our status as an industry leader. From our humble beginnings, we've embarked on an extraordinary growth journey, embracing a modern business model grounded in quality, strategic market foresight, and efficiency through meticulous management. Our ethos is deeply rooted in prioritizing technology, adhering to standardized management practices, delivering superior quality, and ensuring customer satisfaction. With integrity as our foundation, quality as our strength, and customer satisfaction as our ongoing mission, we strive to excel, innovate, and establish a brand that commands trust. We extend our heartfelt gratitude to our esteemed customers for their unwavering support and loyalty. Together with Senhang Technology, we are poised to shape a brighter future, 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.
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