Product Description
General
Introducing the drop-out fuse and load drop-out fuse, an indispensable guardian for outdoor high-voltage electrical systems. Seamlessly installed on the high-voltage side of distribution transformers or at pivotal junctures in a distribution line, these fuses act as vigilant protectors against short circuits and overloads, effortlessly managing current interruptions. Constructed with a robust insulating bracket and reliable fuse tubes, each static contact is securely affixed at the ends of the bracket, while the moving contact finds its place at both ends of the fuse tube. The fuse tube itself is a triumph of design, featuring an inner arc tube enveloped by a resilient phenolic paper tube or an epoxy glass cloth tube. The pull-load drop-out fuse further elevates operational efficacy with its flexible auxiliary contacts and efficient arc chute, ensuring optimal performance during current load operations.
During standard operations, the drop-out fuse maintains a poised closed position, its fuse tube held in tension. However, when a fault occurs within the system, the fuse responds instantaneously, the fault current swiftly blowing the fuse and generating an arc. This arc, a marvel of electrodynamics, ignites the arc tube, releasing a profusion of gas that creates high pressure within the tube. Such pressure propels a vertical wind through the pipeline, skillfully stretching and elongating the arc. Once the fuse blows, the moving contact loses its tension, triggering the locking mechanism to release the fuse tube, which then gracefully drops into the breaking position. When load shedding is required, an insulating rod expertly disengages the moving contact. Initially, both moving and static contacts remain engaged. As the insulating rod continues its pull, auxiliary contacts separate, allowing an arc to form between them. This arc, guided through the hood slit, is efficiently quenched as the arc cover emits gas, ensuring the arc's extinction when the current reaches zero.
Use and Standards
This remarkable product is expertly crafted for use in 10 ~ 35KV distribution lines, branching lines, and on the primary side of distribution transformers. It offers unparalleled protection against overloads and short circuits. Furthermore, it facilitates the seamless separation and reintegration of the rated load current with utmost precision and reliability.
The product model is meticulously prepared in accordance with JB/T8321-1996, governing the design of AC high-voltage fuses. Its parameters are aligned with the rigorous standards set by GB15166.3-1994 for high voltage expulsion fuses. While these standards provide a solid foundation, critical parameters and configurations require refinement based on the interim technological requirements outlined in JB/DQ2139-1986 for 10 ~ 35KV outdoor high voltage drop fuses.
The drop-out fuse cutout and load switching fuse cutout are indispensable high-voltage protective devices designed for outdoor use. These devices, when connected to the incoming feeder of distribution transformers or lines, offer indispensable protection against short circuits and overloads, while also facilitating efficient current switching on and off. Each drop-out fuse cutout is expertly assembled with insulating supports and a robust fuse tube. The static contacts are securely anchored on either side of the insulator support, while the moving contact is strategically placed at each end of the fuse tube. At the core of the fuse tube lies an advanced arc-extinguishing tube, encased within a durable phenolic compound paper tube or an epoxy glass tube. The load switching fuse cutout further excels by incorporating enhanced elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring flawless switching of loading currents.
Under standard operating conditions, the fuse link secures the fuse tube in a steadfast closed position. In the event of system faults, the resulting fault current swiftly melts the fuse, unleashing an arc. This arc energizes the arc-extinguishing tube, which then releases a substantial volume of gas, creating a high-pressure environment. This pressure effectively propels the arc along the tube. Once the fuse link melts, the moving contact loses its tensile strength, unlocking the mechanism and allowing the fuse tube to drop, transitioning the cutout to its open position. When it's necessary to switch off during a cutout load, the operator skillfully pulls the moving contact using an insulating operating bar. Initially, the main contact and auxiliary static contact remain in sync. As the pull continues, the auxiliary contact separates, giving rise to an electric arc between the auxiliary contacts. This arc is efficiently lengthened within the arc-extinguishing enclosure gap, where gas from the enclosure extinguishes the arc as the current crosses 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
Welcome to the world of Zhejiang ChaoTai Complete Equipment Co., Ltd., a beacon of high-tech excellence in electrical integration. With an elite team of R&D, production, and service professionals boasting over 15 years of industry mastery, we continue to set the pace in innovative solutions.
Our expansive product lineup is at the forefront of technology, featuring high-voltage solid-state soft starters, cutting-edge capacitor cabinets, versatile high and low voltage switchgear, advanced gas-insulated switchgear, and comprehensive substation solutions. These engineering marvels find their applications across diverse sectors: energy and chemical industries, metal smelting, electric power grids, industrial manufacturing, academia and research, healthcare and pharmaceuticals, municipal commerce, water conservancy and hydropower, road traffic management, and vibrant commercial and residential environments.
Embracing a philosophy of technological innovation and 'smart manufacturing,' Zhejiang ChaoTai is relentless in its pursuit of excellence. We attract top-tier technical talents to sharpen our core competitiveness, aiming to deliver unparalleled value to our clientele while striving to establish the industry's premier brand. Our journey from inception to excellence is marked by continuous progress, where we have evolved by adhering to a modern business approach: thriving on quality, expanding through reputation, driving efficiency via management, and ensuring development through customer satisfaction. Our commitment is profound: 'technology as the guide, standardized management, outstanding quality, and customer satisfaction.' This ethos enhances our market competitiveness as we steadfastly serve China's electric power and grid sectors with heightened ambition. Integrity is our foundation, quality is our hallmark, service is our mantra, and customer satisfaction is our perpetual mission. We relentlessly pursue excellence, championing continuous innovation and crafting a brand synonymous with trust. Your support propels us forward, and we are deeply grateful to both our new and longstanding customers. Senhang Technology eagerly anticipates partnering with you to forge a brighter future together.
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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