Product Description
General
The drop-out fuse and pull load drop-out fuse are fundamental outdoor high-voltage protective devices, masterfully designed to safeguard electric systems. Positioned strategically on the high-voltage side of distribution transformers or within distribution lines, these fuses deliver robust protection against transformer and line short circuits, along with overloads, while efficiently managing open-circuit load currents. Built with durability in mind, their construction features an insulating bracket and fuse tubes; the static contact is securely fastened at each end of the insulation bracket, while the moving contact is situated at the extremities of the fuse tube. Ingeniously designed, the fuse tube comprises an inner arc tube enveloped by an outer phenolic paper tube or an epoxy glass cloth tube. The pull load drop-out fuse is enhanced with agile auxiliary contacts and an arc chute, augmenting its operational versatility, particularly in handling open or co-load currents.
In routine operations, the drop-out fuse remains closed, with the fuse tube and fuse held taut. Upon occurrence of a system fault, the fault current swiftly melts the fuse, generating an arc. The intense heat from the arc propels gas from the arc tube, increasing the pressure within the tube. This initiates a vertical airflow along the pipeline, seamlessly stretching and extending the arc. As the fuse blows, the moving contact loses tension, activating the locking mechanism, which releases the fuse tube, guiding it into the breaking position. For load pulling, an insulating rod is used to disengage the moving contact, initially maintaining its engagement with the static contact. Persistent pulling with the insulating rod prompts the auxiliary contacts to disconnect, forming and elongating an arc within the hood slit. The arc cover's gas assists in extinguishing the arc when the current decreases to zero.
Use and Standards
This product stands out with its innovative design, specially crafted for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It offers robust protection against overloads and short circuits, while adeptly managing the separation and reconnection of rated load currents.
Exemplifying adherence to outstanding standards, the product model aligns with the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is expertly engineered to meet the rigorous GB15166.3-1994 high voltage fuses expulsion fuses standards. In cases where standards ambiguously define crucial parameters and configurations, precise adjustments are made following the JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology.
Drop-out fuse cutouts and load switching fuse cutouts are pivotal for outdoor high voltage protection. Flawlessly integrated into the incoming feeder of distribution transformers or distribution lines, they provide essential defense against short circuits and overloads, efficiently handling on/off loading currents. The drop-out fuse cutout features insulated insulator supports and a fuse tube; static contacts are securely positioned on either side of the insulator support, with moving contacts at the ends of the fuse tube. The sophisticated design of the fuse tube includes an inner arc-extinguishing tube, encased by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is equipped with robust elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring proficient management of on-off loading currents.
Under normal operating conditions, the fuse link ensures the fuse tube remains securely closed. When faults arise, fault currents rapidly melt the fuse, creating an electric arc that heats the arc-extinguishing tube, releasing abundant gas. This high-pressure environment 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 switch off during cutout loading, operators utilize an insulating bar to pull 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 luminary in the field of electrical integration. Distinguished as a prestigious high-tech enterprise, our commitment to innovation is unwavering. Supported by a team of exceptional R&D, production, and service experts, we are at the forefront of industry transformation. With an impressive legacy spanning over 15 years, we continue to set unparalleled benchmarks in quality and innovation, revolutionizing the industry and raising the bar of excellence.
Our diverse product range epitomizes our relentless pursuit of excellence, featuring top-tier high-voltage solid-state soft starters, advanced capacitor cabinets, multifaceted high and low voltage switchgear, and ultra-modern gas-insulated switchgear. Our offerings include cutting-edge substations, meticulously designed to cater to the varied needs across industries. Whether it is the dynamic energy and chemical sectors, the robust metal smelting operations, or the extensive electric power grids, our solutions are redefining what is possible. Our innovative products are also pivotal in industrial manufacturing, esteemed universities, leading research institutions, in addition to flourishing medical and pharmaceutical fields. In the arena of municipal commerce, water conservancy and hydropower, road traffic systems, as well as diverse commercial and residential domains, our products assure unmatched reliability and efficiency.
At Zhejiang ChaoTai, our steadfast dedication to technological innovation and our progressive 'smart manufacturing' philosophy inspire us to recruit top technical talent. This strategic approach enhances our core competitiveness, allowing us to deliver extraordinary value to our clients and fortify our stature as a front-runner in the industry. From our modest beginnings, we have embarked on a remarkable journey of expansion, adopting a contemporary business model grounded in quality, market foresight, and precision management. Our principles emphasize the primacy of technology, standardized management, superior quality, and unwavering customer satisfaction. With integrity as our foundation, excellence as our hallmark, and customer satisfaction as our perpetual mission, we strive to innovate, excel, and become a brand synonymous with trust. We express our sincere gratitude to our esteemed clientele for their enduring support and loyalty. Alongside Senhang Technology, we are set to forge a brilliant future, together, 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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