Product Description
General
The drop-out fuse and pull load drop-out fuse serve as quintessential outdoor high-voltage protective devices, vital for safeguarding your electrical systems with unparalleled precision. These fuses are expertly installed on the high-voltage side of distribution transformers or as indispensable links in distribution lines. They ensure robust protection against transformer and line short circuits, effectively manage overload situations, and proficiently facilitate open-circuit load currents. With a construction comprising an insulating bracket and fuse tubes, the static contact is securely attached to both ends of the insulation bracket, while the moving contact is strategically positioned on the fuse tube ends. The intricately designed fuse tube features an inner arc tube cloaked by a resilient outer phenolic paper tube or epoxy glass cloth tube. The pull load drop-out fuse is adeptly equipped with flexible auxiliary contacts and an arc chute, enhancing its operational flexibility when engaging in open or co-load currents.
During standard operations, the drop-out fuse resides in a steadfast closed position, with the fuse tube and fuse under optimal tension. Upon encountering system failures, the fault current swiftly melts the fuse, initiating an arc. The arc tube, exposed to the intense heat, releases copious amounts of gas, generating high pressure within. This results in a vertical airflow, efficiently stretching and extending the arc along the pipeline. Once the fuse is blown, the moving contact loses tension, activating the locking mechanism, releasing the fuse tube, and allowing it to drop into a definitive breaking position. To facilitate load pulling, an insulating rod is employed to disengage the moving contact. Initially, it maintains contact with the static contact. Continued pulling with the insulating rod separates the auxiliary contacts, with an arc forming and extending within the hood slit. The arc cover's gas assists in extinguishing the arc as the current reaches zero, ensuring seamless and safe operation.
Use and Standards
Ingeniously crafted, this product is designed for seamless application in 10 ~ 35KV distribution lines, branching lines, and the primary side of distribution transformers. It offers unrivaled protection against overloads and short circuits, while effortlessly managing the separation and combination of rated load currents, making it an indispensable tool for reliable power distribution management.
This innovative product model is meticulously crafted in alignment with the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It adheres to the rigorous standards of the GB15166.3-1994 high voltage fuses expulsion fuses guidelines. In instances where standards ambiguously define key parameters and configurations, proactive corrections are implemented in adherence to JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology, ensuring unwavering conformity and reliability.
Drop-out fuse cutouts and load switching fuse cutouts are pivotal outdoor high-voltage protective devices, seamlessly integrated with the incoming feeder of distribution transformers or distribution lines. They provide indispensable protection against short circuits and overloads, while adeptly managing on/off loading currents. The drop-out fuse cutout consists of insulate insulator supports and a fuse tube, with static contacts securely positioned on both sides of the insulator support and moving contacts installed at the fuse tube ends. The fuse tube's architecture includes an inner arc-extinguishing tube, elegantly enveloped by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is designed with enforced elastic auxiliary contacts and an arc-extinguishing enclosure, skillfully managing on-off loading current, ensuring your power systems remain safe and efficient.
Under standard working conditions, the fuse link ensures the fuse tube is steadfastly secured in a closed position. When system faults occur, the fault current rapidly melts the fuse, producing a formidable electric arc that heats the arc-extinguishing tube and releases substantial gas. This creates high pressure that efficiently blows the arc along the tube. Upon the melting of the fuse link, the moving contact loses its tension, the mechanism locks, and the fuse tube drops out, transitioning the cutout to an open position. To seamlessly switch off during cutout loading, operators utilize an insulating operating bar to adeptly pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but further pulling disengages the auxiliary contacts, generating an elongating electric arc within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism releases gas, effectively extinguishing the arc as the current passes zero, ensuring smooth and safe operation.
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 distinguished leader in the realm of electrical integration, recognized as a prestigious high-tech enterprise. With a highly talented team dedicated to research and development, production, and exemplary service, we harness over 15 years of extensive experience to drive innovation and achieve excellence in the industry.
Our product portfolio is truly unparalleled, featuring an impressive array of high-voltage solid-state soft starters, sophisticated capacitor cabinets, high and low voltage switchgear, cutting-edge gas-insulated switchgear, and state-of-the-art substations. Our innovative solutions are widely adopted across diverse sectors, including the dynamic energy and chemical industries, robust metal smelting operations, expansive electric power grids, and advanced industrial manufacturing landscapes. We proudly serve prestigious universities, pioneering research institutions, the thriving medical and pharmaceutical industries, as well as bustling municipal commerce. Additionally, our expertise caters to the critical water conservancy and hydropower sectors, comprehensive road traffic systems, and a vast range of commercial and residential domains.
Driven by a relentless passion for technological innovation and guided by our visionary 'smart manufacturing' philosophy, we are committed to attracting top-tier technical talent. This dedication enhances our core competitiveness, allowing us to deliver unparalleled value to our clients while striving to establish our brand as an industry leader. Since our inception, our phenomenal journey has seen us evolve from modest beginnings to achieving industry excellence. We are rooted in innovation, following a modern business model that emphasizes quality as the bedrock for survival, market orientation for expansion, reputation for growth, and exceptional efficiency through meticulous management. Our unwavering commitment is to prioritize technology as our guiding light, adhere to standardized management practices, consistently deliver outstanding quality, and ensure customer satisfaction. This approach fortifies our presence in the market, empowering us to serve China's electric power and grid sectors with ambitious objectives. Integrity forms our foundation, quality is our strength, service is our hallmark, and customer satisfaction is our enduring ethos. Our steadfast goals are the relentless pursuit of excellence, continuous innovation, and the creation of a brand that commands trust. Your recognition propels our journey, and we extend our heartfelt gratitude to all our esteemed customers for their unwavering support and loyalty. Together with Senhang Technology, we look forward to crafting 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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