Product Description
General
The drop-out fuse and pull load drop-out fuse represent essential outdoor high-voltage protective solutions, designed as the steadfast guardians of electric systems. Expertly installed on the high-voltage side of distribution transformers or within distribution lines, these fuses provide exceptional defense against transformer and line short circuits, as well as overloads, while skillfully regulating open-circuit load currents. Their robust architecture consists of an insulating bracket and fuse tubes; the static contact is securely affixed at each end of the insulation bracket, while the moving contact is located at the fuse tube's extremities. Ingeniously engineered, the fuse tube includes an inner arc tube enveloped by an outer phenolic paper tube or an epoxy glass cloth tube. With a focus on operational excellence, the pull load drop-out fuse is equipped with agile auxiliary contacts and an arc chute, enhancing its operational flexibility, especially when managing open or co-load currents.
In routine operations, the drop-out fuse remains closed, keeping the fuse tube and fuse under tension. When a system fault occurs, the fault current promptly melts the fuse, initiating an arc. The arc's intense heat releases a surge of gas from the arc tube, increasing the pressure inside the tube. This action starts a vertical airflow along the pipeline, expertly stretching and elongating the arc. Once the fuse blows, the moving contact loses tension, triggering the locking mechanism, which releases the fuse tube, guiding it into the breaking position. For load pulling, an insulating rod is used to disengage the moving contact, initially maintaining its connection with the static contact. Continued pulling with the insulating rod causes the auxiliary contacts to detach, forming and lengthening an arc within the hood slit. The arc cover's gas facilitates the arc's extinction as the current approaches zero.
Use and Standards
This product excels with an innovative design ideal for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It serves as a formidable protector against overloads and short circuits, skillfully managing the separation and union of rated load currents.
Complying with exemplary standards, the product model aligns with the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is precisely engineered to meet the stringent GB15166.3-1994 high voltage fuses expulsion fuses standards. Should standards ambiguously define crucial parameters and configurations, precision refinements are made in accordance with JB/DQ2139-1986 specifications 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 integrated into the incoming feeder of distribution transformers or distribution lines, they offer vital defense against short circuits and overloads, efficiently managing on/off loading currents. The drop-out fuse cutout features insulated insulator supports and a fuse tube; static contacts are firmly placed on either side of the insulator support, and moving contacts are positioned at the ends of the fuse tube. The intricate construction of the fuse tube includes an inner arc-extinguishing tube, encased by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is equipped with 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 that the fuse tube remains securely closed. When faults occur, fault currents rapidly melt the fuse, producing an electric arc that heats the arc-extinguishing tube, releasing substantial gas. This high pressure propels the arc along the tube. Once the fuse link melts, the moving contact loses tension, triggering 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 pull 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 luminous beacon in the realm of electrical integration. As a prestigious high-tech enterprise, we are committed to groundbreaking innovation, driven by a distinguished team excelling in R&D, production, and service. With over 15 years of profound experience, we are not just revolutionizing the industry but are setting new benchmarks of excellence.
Our expansive product range speaks volumes about our 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 also provide state-of-the-art substations, meticulously designed to meet diverse industry requirements. From dynamic energy and chemical sectors to robust metal smelting and expansive electric power grids, our solutions are redefining capabilities. Our advanced offerings play a pivotal role in industrial manufacturing, esteemed universities, pioneering research entities, as well as thriving medical and pharmaceutical sectors. In the realms of municipal commerce, water conservancy and hydropower, road traffic systems, and a wide spectrum of commercial and residential areas, our products deliver unparalleled reliability and efficiency.
At Zhejiang ChaoTai, our unwavering commitment to technological innovation and a visionary 'smart manufacturing' philosophy drives us to attract top-tier technical talent, empowering us to elevate our core competitiveness and deliver unmatched value to our clients while solidifying our position as an industry leader. From humble beginnings, we've embarked on an extraordinary journey of growth, embracing a contemporary business model founded on quality, market foresight, and efficiency through meticulous management. Our ethos is rooted in prioritizing technology, adhering to standardized management, delivering exceptional quality, and ensuring customer satisfaction. With integrity as our foundation, quality as our strength, and customer satisfaction as our continual mission, we aim to excel, innovate, and build a brand that inspires trust. Our heartfelt gratitude extends to all our esteemed customers for their unwavering support and loyalty. Together with Senhang Technology, we are poised to craft 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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