Product Description
General
The drop-out fuse and pull load drop-out fuse are sophisticated outdoor high-voltage protection devices, crucial for safeguarding your electrical systems. Primarily deployed on the high-voltage side of distribution transformers or as integral components within distribution lines, these fuses provide unparalleled protection against transformer and line short circuits, as well as overloads, while facilitating open-circuit load currents. Crafted with precision, the assembly features an insulating bracket and robust fuse tubes. The static contact is securely attached to both ends of the insulation bracket, while the moving contact is expertly positioned on the ends of the fuse tube. The fuse tube itself is meticulously engineered from an inner arc tube, encapsulated by an outer phenolic paper tube or a durable epoxy glass cloth tube. Equipped with flexible auxiliary contacts and an arc chute, the pull load drop-out fuse enhances operational flexibility, making it optimal for situations involving opening or co-load currents.
During standard operations, the drop-out fuse remains confidently closed, with the fuse tube and fuse under a state of tension. In the event of a system failure, the fault current instantly melts the fuse, creating an arc. The arc tube, subjected to the arc's intense heat, releases copious amounts of gas, generating substantial pressure within the tube. This results in a forceful vertical wind along the path, effectively elongating the arc. Upon fuse rupture, the moving contact loses its tension, activating the locking mechanism, which releases the fuse tube and transitions it to the breaking position. For load pulling, an insulating rod is utilized to disengage the moving contact, initially maintaining connection with the static contact. Continued pulling with the insulating rod skillfully separates the auxiliary contacts, forming and extending an arc within the hood slit. The gas within the arc cover expedites the extinguishing process as the current reaches zero.
Use and Standards
Ingeniously crafted for deployment in 10 ~ 35KV distribution lines, branching lines, and the primary side of distribution transformers, this product offers exceptional protection against overloads and short circuits. It adeptly manages the separation and combination of rated load currents, ensuring reliability and safety.
The product model rigorously follows the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is engineered to meet the stringent requirements of the GB15166.3-1994 high voltage fuses expulsion fuses standards. In cases where standards are ambiguously defined, corrections are meticulously aligned with JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology, ensuring precision and compliance.
Drop-out fuse cutouts and load switching fuse cutouts are indispensable outdoor high voltage protective devices. Seamlessly integrated with the incoming feeder of distribution transformers or distribution lines, they provide essential protection against short circuits and overloads while efficiently managing on and off loading currents. The drop-out fuse cutout comprises durable insulate insulator supports and a well-constructed fuse tube. Static contacts are securely fastened on both sides of the insulator support, while moving contacts are expertly installed at the fuse tube ends. The fuse tube's architecture includes a proficient inner arc-extinguishing tube encompassed by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is designed with reinforced elastic auxiliary contacts and a state-of-the-art arc-extinguishing enclosure, ensuring adept management of on-off loading currents.
Under normal operating conditions, the fuse link ensures the fuse tube remains securely closed. When system faults occur, the fault current swiftly melts the fuse, producing an electric arc that heats the arc-extinguishing tube, releasing substantial gas to create high pressure and blow the arc along the tube. Upon fuse link melting, the moving contact loses tension, the mechanism locks, and the fuse tube drops out, shifting the cutout to an open position. To switch off during cutout loading, operators utilize an insulating operating bar to pull the moving contact. Initially, the main contact and auxiliary static contact stay engaged, but further pulling disengages the auxiliary contacts, generating an electric arc that elongates within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism efficiently releases gas to extinguish the arc as the current zeroes, ensuring safety and continuity.
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 at the pinnacle of electrical integration, heralded as a prestigious high-tech enterprise. With a distinguished team specializing in R&D, production, and service, we harness over 15 years of rich experience, paving the way for innovation and excellence in the industry.
Our product range is truly exceptional, featuring high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, advanced gas-insulated switchgear, and cutting-edge substations. Our groundbreaking solutions find significant applications across a multitude of sectors, including the dynamic energy and chemical industries, robust metal smelting, expansive electric power grids, and innovative industrial manufacturing. Our influence resonates in esteemed universities, pioneering research institutions, the burgeoning medical and pharmaceutical sectors, as well as municipal commerce. Moreover, our expertise is pivotal in the essential water conservancy and hydropower sectors, advanced road traffic systems, and a diverse array of commercial and residential spaces.
Driven by an unwavering pursuit of technological innovation and guided by a visionary 'smart manufacturing' philosophy, we are steadfast in attracting top-tier technical talent. This dedication enhances our core competitiveness, empowering us to deliver unparalleled value to our clients while striving to establish our brand as a leader in the industry. Since our inception, we have traversed a remarkable journey of growth, evolving from humble beginnings to industry excellence. Our ethos revolves around innovation, embracing a modern business model that thrives on quality for survival, market focus for growth, reputation for development, and efficiency through meticulous management. We are unwavering in our pledge to prioritize technology as our compass, adhere to standardized management, deliver unmatched quality, and ensure complete customer satisfaction. This strengthens our market presence and propels us to serve China's electric power and grid sectors with ambitious goals. Integrity is our foundation, quality is our strength, service is our hallmark, and customer satisfaction is our enduring ethos. Our steadfast objectives include the relentless pursuit of excellence, continuous innovation, and crafting a brand that commands trust. Your recognition fuels our journey, and we extend our heartfelt gratitude to all our esteemed customers for their unwavering support and loyalty. Together with Senhang Technology, we aspire to forge 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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