Product Description
General
Introducing the pinnacle of outdoor high-voltage electrical protection: the Drop-out Fuse and Pull Load Drop-out Fuse. These state-of-the-art devices are strategically crafted to safeguard the high-voltage side of distribution transformers or serve as pivotal connections within distribution lines. They are indispensable for protecting against short circuits and overloads in transformers and lines, while also facilitating the efficient opening and co-loading of current. Ingeniously constructed, the drop-out fuse integrates an insulating bracket and fuse tubes, with static contacts securely positioned at the bracket's ends and moving contacts at the fuse tube's extremities. The sophisticated design of the fuse tube includes an inner arc tube paired with a robust outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse takes flexibility to new heights with its auxiliary contacts and arc chute, meticulously engineered for smooth current load operations.
In seamless standard operations, the drop-out fuse remains securely closed with the fuse tube expertly tensioned. Should a system malfunction arise, the fault current acts swiftly, blowing the fuse and initiating an arc. This arc ignites the arc tube, setting off the decomposition of substantial gas volumes. This generates high pressure, crafting a vertical wind path that elegantly stretches and elongates the arc. Post fuse-blow, the moving contact releases tension, rotates outward, and the locking mechanism disengages, letting the fuse tube drop to signify a breaking position. For load pulling, an insulating rod is utilized to pull the moving contact, ensuring contact with the static contact. As the auxiliary contacts separate, a new arc forms and is extended within the hood slit. The arc cover, with its gas content, aids in extinguishing the arc as the current approaches zero.
Use and Standards
This exceptional product is meticulously designed for incorporation in 10 to 35KV distribution lines, including branching lines and on the primary side of distribution transformers. It provides unparalleled protection against overloads and short circuits, enabling seamless separation and unification of the rated load current.
The precision-engineered design of this product strictly conforms to the JB/T8321-1996 Method for AC high-voltage fuse preparation, while its parameters align with the GB15166.3-1994 high voltage fuses Expulsion fuses standards. In the absence of detailed parameter definitions within the standards, adjustments are executed in accordance with the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout stand as premier choices in outdoor high-voltage protective devices. Masterfully engineered to link with the incoming feeder of distribution transformers or lines, they are pivotal in protecting against short circuits and overloads, all while adeptly managing the on/off load current. The drop-out fuse cutout consists of insulating insulator supports and a fuse tube, with static contacts firmly mounted on both sides of the insulator support and moving contacts at the fuse tube ends. The fuse tube's architecture includes an internal arc-extinguishing tube and an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout adds enforced elastic auxiliary contacts and an arc-extinguishing enclosure for proficient on-off load current switching.
In the realm of normal operations, the fuse link ensures the fuse tube remains taut, maintaining a secure closed position. Upon encountering faults, the fault current instantaneously melts the fuse, unleashing an electric arc. This process causes the arc-extinguishing tube to heat and expel significant gas volumes, generating high pressure that elongates the arc along the tube. Once the fuse link melts, the moving contact loses tension, allowing the mechanism to lock and the fuse tube to disengage, switching to an open position. For load switching during cutout, operators utilize an insulating operating bar to pull the moving contact. Initially, the main contact stays engaged with the auxiliary static contact. As pulling continues, an electrical arc is formed between the auxiliary contacts, which then elongates within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism expels gas to extinguish the arc 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. represents the pinnacle of technological advancement and excellence in electrical integration. As a vibrant high-tech enterprise, we pride ourselves on a seasoned R&D, production, and service team enriched by over 15 years of dedicated expertise in the industry, continually pushing the boundaries of innovation.
Our diverse product range boasts high-voltage solid-state soft starters, sophisticated capacitor cabinets, both high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and resilient substations. These high-performance solutions are vital across numerous sectors, including the energy and chemical industries, metal smelting, expansive electric power grids, and industrial manufacturing. Our impact extends to esteemed universities and research institutions, empowers the medical and pharmaceutical domains, strengthens municipal commerce, enhances water conservancy and hydropower projects, optimizes road traffic systems, and enriches both commercial and residential developments. Our diverse offerings provide the backbone to critical infrastructures, ensuring efficiency and reliability across the board.
Anchored in a resolute commitment to technological innovation, paired with our philosophy of "smart manufacturing," we are focused on attracting elite technical talent to comprehensively enhance our core competencies. We strive to deliver unmatched value to our clients and aim to establish the most respected brand in the industry. From our inception, we have relentlessly pursued excellence, guided by a modern business ethos where quality is our lifeline, market orientation prevails, reputation boosts development, and efficient management drives success. We adhere to our guiding tenets: "technology as the guide, standardized management, exceptional quality, and customer satisfaction," which steer our quality and technical talent management practices. Our mission is to serve China's electric power and grid transmission sectors with speed and strength. At our foundation, integrity is non-negotiable, quality is paramount, service is supreme, and customer satisfaction remains our eternal promise. Our unwavering pursuit of excellence and innovation, along with our dedication to building a trusted brand, are our guiding principles. Your recognition propels our progress. We extend heartfelt gratitude to all our loyal clients for their enduring support, and Senhang Technology eagerly anticipates collaborating with you for 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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