Product Description
General
The drop-out fuse and pull-load drop-out fuse are essential outdoor high-voltage electrical protection devices. Primarily installed on the high-voltage side of distribution transformers or as a supportive link on distribution lines, they safeguard against transformer and line short circuits, overloads, providing effective open and co-load current protection. Composed of robust insulating brackets and durable fuse tubes, the static contacts are affixed to the insulation bracket's ends, while the moving contacts are positioned at the ends of the fuse tube. The fuse tube itself is an ingenious assembly of an inner arc tube enveloped by an outer phenolic paper or epoxy glass cloth tube, designed to withstand the harshest conditions. Enhancing operational flexibility, the pull-load drop-out fuse features auxiliary contacts and an arc chute, enabling seamless open and co-load current handling.
In normal operations, the fuse tube is secured in a closed position, maintained by fuse tension. Upon system failure, the fault current swiftly blows the fuse, generating an arc that ignites the arc tube. This process decomposes substantial gas volumes, creating high pressure within the tube, which propels a vertical wind along the pipeline, ensuring rapid arc elongation and stretch. Following the fuse blow, the moving contact loses tension, triggering the locking mechanism to release the fuse tube, which then drops to establish a breaking position. For load pulling, an insulating rod is used to engage the moving contact, which remains in contact with the static contact initially. Further pulling separates the auxiliary contacts, generating an arc that stretches through the hood slit. The arc cover, infused with gas, extinguishes the arc at zero current, ensuring safe and efficient operation.
Use and Standards
This state-of-the-art product is engineered for deployment on 10 to 35KV distribution line branches and the primary side of distribution transformers. It provides unparalleled overload and short circuit protection while seamlessly managing rated load current separation and combination.
The product conforms to model specifications outlined in the JB/T8321-1996 standards for type AC high-voltage fuses. Its parameters adhere to the GB15166.3-1994 standards for high voltage expulsion fuses. Although some crucial parameters and configurations are not explicitly defined in these standards, adjustments are made based on JB/DQ2139-1986 technical requirements for 10 to 35KV outdoor high voltage drop fuses, ensuring compliance and reliability.
Engineered for outdoor use, the drop-out fuse cutout and load switching fuse cutout serve as high voltage protective devices. They integrate seamlessly with the incoming feeder of distribution transformers or lines, primarily safeguarding against short circuits, overloads, and facilitating on/off load current management. The drop-out fuse cutout is meticulously crafted from insulating supports and fuse tubes. Static contacts are securely fixed on the insulator support's sides, while moving contacts are installed on the fuse tube ends. The fuse tube features an inner arc-extinguishing tube, enveloped by an outer phenolic compound paper or epoxy glass tube. Enhanced with enforced elastic auxiliary contacts and an arc-extinguishing enclosure, the load switching fuse cutout ensures efficient on-off load current operations.
During regular functioning, the fuse link secures the fuse tube in a closed position. In the event of system faults, the fault current immediately melts the fuse link, creating an electric arc. This causes the arc-extinguishing tube to heat and expel significant gas volumes, producing high pressure and directing the arc along the tube. Once the fuse link melts, the moving contact loses tension, unlocking the mechanism and causing the fuse tube to drop, transitioning the cutout to an open position. To switch off during load cutout, operators utilize an insulating operating bar to pull the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As pulling continues, the auxiliary contact separates, generating an arc that lengthens within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing gas disperses to extinguish the arc as the current approaches 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 innovation within the realm of electrical integration. As a high-tech enterprise, we boast an elite R&D, production, and service team, enriched with over 15 years of profound industry expertise.
Our extensive range of cutting-edge products includes high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, sophisticated gas-insulated switchgear, and robust substations. Our solutions are seamlessly integrated across a spectrum of industries such as energy, chemical, metal smelting, power grids, industrial manufacturing, academia, medical and pharmaceutical sectors, municipal commerce, water management, hydropower, road traffic, and both commercial and residential domains.
Driven by a fervor for technological advancement, we embrace the philosophy of 'smart manufacturing' by continually attracting top-tier technical talent. This strategic pursuit fortifies our core competencies, enabling us to deliver unparalleled services to our esteemed clientele and carve a name as an industry leader. Since our inception, we have soared, transforming from a fledgling entity to a paragon of excellence. Our commitment to innovation is steadfast, as we traverse a modern business landscape anchored in quality, market focus, reputation-driven growth, and management efficiency. We pledge to 'technology as the guide, standardized management, excellent quality, and customer satisfaction' in managing our quality and talents. Our mission is to dominate the transmission and distribution domains of China's electric power and grid infrastructure with unmatched speed, strength, and ambition. Anchored in integrity, our ethos prioritizes quality, unparalleled service, and absolute customer satisfaction. The relentless pursuit of excellence, unwavering innovation, and the creation of a trustworthy brand define our developmental ethos. Your trust fuels our journey. We express heartfelt gratitude to our valued patrons for their unyielding support, as Senhang Technology eagerly anticipates forging a collaborative future with you, crafting a tapestry of success 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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