Product Description
General
Renowned for their unparalleled reliability, the drop-out fuse and pull load drop-out fuse emerge as essential stalwarts in the realm of outdoor high-voltage protection. Purpose-built to serve as the vigilant sentinels of electrical systems, these fuses are strategically deployed on the high-voltage side of distribution transformers or embedded within distribution lines. Their mission is to offer impregnable protection against transformer and line short circuits, as well as overloads, while adeptly handling open-circuit load currents. Engineered with precision, these fuses boast a robust construction comprising an insulating bracket and fuse tubes. The static contact is securely anchored at each end of the insulation bracket, while the moving contact resides at the extremities of the fuse tube. Ingeniously configured, the fuse tube features an inner arc tube sheathed by an outer phenolic paper tube or an epoxy glass cloth tube. Designed for peak operational performance, the pull load drop-out fuse is equipped with nimble auxiliary contacts and an arc chute, amplifying its operational versatility, especially in scenarios involving open or co-load currents.
In typical operational scenarios, the drop-out fuse remains steadfastly closed, maintaining the fuse tube and fuse under taut conditions. When a system fault arises, the fault current promptly melts the fuse, giving rise to an arc. The arc's intense heat triggers a cascade of gas emergence from the arc tube, elevating the pressure within the tube. This sets off a dynamic vertical airflow along the pipeline, adeptly stretching and elongating the arc. As the fuse reaches its breaking point, the tension in the moving contact dissipates, activating the locking mechanism, which then liberates the fuse tube, ushering it into the breaking position. For load disconnection, an insulating rod is utilized to disengage the moving contact, initially preserving its connection with the static contact. Continued exertion with the insulating rod causes the auxiliary contacts to part ways, forming and elongating an arc within the hood slit. The arc cover's gas plays a crucial role in extinguishing the arc when the current gracefully descends to zero.
Use and Standards
This product stands out with its cutting-edge design, meticulously crafted for deployment in 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It serves as an unwavering bastion of protection against overloads and short circuits, while elegantly managing the separation and union of rated load currents.
Upholding the highest standards of excellence, this product model adheres to the rigorous JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is expertly engineered to comply with the demanding GB15166.3-1994 high voltage fuses expulsion fuses standards. In instances where standards ambiguously define essential parameters and configurations, precision adjustments are meticulously executed in accordance with JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology.
Drop-out fuse cutouts and load switching fuse cutouts are indispensable components for outdoor high voltage protection. Seamlessly integrated into the incoming feeder of distribution transformers or distribution lines, they deliver critical defense against short circuits and overloads, efficiently managing on/off loading currents. The drop-out fuse cutout is equipped with insulate insulator supports and a fuse tube; static contacts are securely anchored on either side of the insulator support, while moving contacts rest at the ends of the fuse tube. The intricately designed fuse tube includes an inner arc-extinguishing tube, enveloped by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout features robust elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring efficient management of on-off loading currents.
Operating under standard conditions, the fuse link ensures the fuse tube remains securely closed. Upon encountering faults, the fault currents rapidly melt the fuse, engendering an electric arc that heats the arc-extinguishing tube, releasing abundant gas. This heightened pressure propels the arc along the tube. Once the fuse link melts, the moving contact loses tension, triggering the mechanism to lock, and the fuse tube drops out, shifting the cutout to an open state. For switching off during cutout loading, operators employ an insulating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but further pulling initiates the disengagement of the auxiliary contacts, generating an electric arc that elongates within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism releases gas, securing the arc's extinction as the current gracefully 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 shining beacon of innovation and excellence in the world of electrical integration. As a prestigious high-tech enterprise, we are at the forefront of technological advancement, driven by a distinguished team of experts excelling in research and development, production, and service. With a rich history spanning over 15 years, we are not just participating in the industry; we are transforming it, setting new benchmarks for excellence and leading the charge into the future.
Our diverse product range is a living testament to our unwavering commitment to superior quality and innovation. We offer a premium selection of high-voltage solid-state soft starters that ensure seamless operations, sophisticated capacitor cabinets designed for optimal efficiency, and versatile high and low voltage switchgear that caters to a wide array of applications. Our cutting-edge gas-insulated switchgear is crafted with precision to meet the demands of modern industries, while our state-of-the-art substations are tailored to address diverse industry requirements. Our solutions are trusted by dynamic energy and chemical sectors, robust metal smelting industries, and expansive electric power grids. Additionally, our advanced offerings are integral to industrial manufacturing, esteemed universities, pioneering research entities, and thriving medical and pharmaceutical sectors. In the realm of municipal commerce, water conservancy and hydropower, road traffic systems, as well as a vast array of commercial and residential projects, our products stand out, delivering unmatched reliability and superior efficiency.
At Zhejiang ChaoTai, our steadfast dedication to technological innovation and a visionary 'smart manufacturing' philosophy fuels our drive to attract the best technical talent. This empowers us to enhance our core competitiveness and deliver unparalleled value to our esteemed clients, solidifying our position as an industry leader. From our humble beginnings, we have embarked on an extraordinary journey of growth, embracing a contemporary business model that is built on a foundation of quality, market foresight, and efficiency through meticulous management practices. Our corporate ethos is firmly grounded in the prioritization of technology, adherence to standardized management protocols, delivery of exceptional quality, and the assurance of customer satisfaction. With integrity as our cornerstone, quality as our strength, and customer satisfaction as our continuous mission, we aim to excel, innovate, and build a brand that commands trust and respect. We extend our heartfelt gratitude to all our valued customers for their unwavering support and loyalty. Together with Senhang Technology, we are poised to craft a brighter and more prosperous 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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