Product Description
General
The drop-out fuse and pull load drop-out fuse are indispensable champions of outdoor high-voltage protection, meticulously engineered to safeguard electrical systems. Strategically positioned on the high-voltage side of distribution transformers or within distribution lines, these fuses serve as stalwart sentinels against transformer and line short circuits, as well as overloads, all the while deftly handling open-circuit load currents. Their robust design includes an insulating bracket and fuse tubes; the static contact is securely anchored at both ends of the insulation bracket, while the moving contact graces the ends of the fuse tube. The fuse tube's ingenious construction features an inner arc tube cocooned by an outer phenolic paper tube or an epoxy glass cloth tube. Created for superior operational functionality, the pull load drop-out fuse is augmented with nimble auxiliary contacts and an arc chute, amplifying its operational versatility, especially when confronting open or co-load currents.
During routine operations, the drop-out fuse remains steadfastly closed, ensuring the fuse tube and fuse are taut. Upon system fault initiation, the fault current swiftly liquefies the fuse, sparking an arc. The arc's blistering heat triggers a torrent of gas from the arc tube, elevating the pressure within the tube. This catalyzes a vertical airflow along the pipeline, artfully stretching and elongating the arc. As the fuse ruptures, the moving contact's tension dissipates, activating the locking mechanism, which then liberates the fuse tube, coaxing it into a breaking stance. For load disconnections, an insulating rod disengages the moving contact, initially preserving its connection with the static contact. Persistent maneuvering with the insulating rod results in auxiliary contacts disengaging, producing and elongating an arc within the hood slit. The arc cover's gas facilitates extinguishing the arc when the current approaches zero.
Use and Standards
This product epitomizes ingenuity with its design, perfectly suited for 10 ~ 35KV distribution lines, branch lines, and the primary sides of distribution transformers. It stands as a bastion of protection against overloads and short circuits, while proficiently managing the separation and union of rated load currents.
In strict adherence to exemplary standards, the product model aligns with the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is meticulously engineered to meet the rigorous GB15166.3-1994 high voltage fuses expulsion fuses standards. In instances where standards ambiguously define critical parameters and configurations, precision adjustments are 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 paramount for outdoor high voltage protection. Seamlessly integrated into the incoming feeder of distribution transformers or distribution lines, they deliver crucial defense against short circuits and overloads, efficiently managing on/off loading currents. The drop-out fuse cutout features insulated insulator supports and a fuse tube; static contacts are securely placed on either side of the insulator support, and moving contacts rest at the ends of the fuse tube. The elaborate design of the fuse tube includes an inner arc-extinguishing tube, encapsulated by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout boasts robust elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring proficient management of on-off loading currents.
In standard operating conditions, the fuse link guarantees that the fuse tube remains securely fastened. When faults occur, fault currents rapidly melt the fuse, creating an electric arc that heats the arc-extinguishing tube, releasing abundant gas. This high 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, transitioning the cutout to an open state. To disconnect during cutout loading, operators use an insulating bar to disengage the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but further pulling disengages the auxiliary contacts, generating an electric arc that elongates within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism releases gas, ensuring the arc is extinguished 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. stands as a beacon of excellence and innovation in the realm of electrical integration. As a prestigious high-tech enterprise, we are dedicated to pushing the boundaries of what's possible, driven by a team of experts excelling in research, development, production, and service. With over 15 years of illustrious experience, we are transforming the industry, setting new benchmarks for excellence and pioneering breakthroughs that redefine the standards.
Our product range is a remarkable testament to our unwavering commitment to excellence, featuring the finest high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, and the most advanced gas-insulated switchgear available. We also offer cutting-edge substations, each meticulously designed to meet the diverse needs of various industries. Whether it's the dynamic energy and chemical sectors or the robust metal smelting and expansive electric power grids, our solutions are engineered to redefine capabilities. Our advanced offerings play a pivotal role in industrial manufacturing, esteemed universities, pioneering research entities, and the thriving medical and pharmaceutical sectors. In municipal commerce, water conservancy and hydropower, road traffic systems, and an extensive array of commercial and residential areas, our products deliver unparalleled reliability and efficiency, truly transforming the landscapes they serve.
At Zhejiang ChaoTai, our steadfast commitment to technological innovation and our forward-thinking 'smart manufacturing' philosophy drive us to attract the finest technical talent. This empowers us to enhance our core competitiveness, providing unparalleled value to our clients while solidifying our stature as an industry leader. From humble beginnings, we've embarked on a remarkable journey of growth, embracing a contemporary business model grounded in quality, market insight, and efficiency through meticulous management. Our ethos is anchored in prioritizing technology, adhering to standardized management, delivering exceptional quality, and ensuring customer satisfaction. With integrity as our foundation, quality as our fortitude, and customer satisfaction as our perpetual mission, we aim to excel, innovate, and cultivate a brand that commands trust. We extend heartfelt gratitude to all our esteemed customers for their unwavering support and loyalty. Together with Senhang Technology, we are poised to illuminate 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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