Product Description
General
The drop-out fuse and pull load drop-out fuse are vital outdoor high-voltage protective devices, crafted as the guardians of electric systems. Positioned strategically on the high-voltage side of distribution transformers or within distribution lines, these fuses provide formidable defense against transformer and line short circuits, as well as overloads, while expertly managing open-circuit load currents. Their robust construction features an insulating bracket and fuse tubes; the static contact is firmly secured on each end of the insulation bracket, while the moving contact is positioned at the fuse tube's extremities. The fuse tube is ingeniously designed with an inner arc tube encased by an outer phenolic paper tube or an epoxy glass cloth tube. Designed for operational excellence, the pull load drop-out fuse comes equipped with agile auxiliary contacts and an arc chute, which enhance its operational flexibility, especially when managing open or co-load currents.
In routine operations, the drop-out fuse remains closed, with the fuse tube and fuse kept taut. When a system fault arises, the fault current swiftly melts the fuse, creating an arc. The arc's intense heat expels a surge of gas from the arc tube, increasing pressure inside the tube. This initiates a vertical airflow along the pipeline, skillfully stretching and elongating the arc. As the fuse blows, the tension of the moving contact is released, triggering the locking mechanism, which then releases the fuse tube, guiding it into the breaking position. For load pulling, an insulating rod is employed to disengage the moving contact, initially keeping its connection with the static contact. Continuous pulling with the insulating rod causes the auxiliary contacts to detach, forming and elongating an arc within the hood slit. The arc cover's gas aids in extinguishing the arc when the current falls to zero.
Use and Standards
This product excels with an innovative design tailored for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It acts as a bastion of protection against overloads and short circuits, while deftly managing the separation and union of rated load currents.
Adhering 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 stringent GB15166.3-1994 high voltage fuses expulsion fuses standards. Should standards ambiguously define crucial parameters and configurations, precise adjustments are made 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 essential for outdoor high voltage protection. Seamlessly integrated into the incoming feeder of distribution transformers or distribution lines, they offer vital defense against short circuits and overloads, efficiently managing on/off loading currents. The drop-out fuse cutout features insulate 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 intricate 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.
Under standard operating conditions, the fuse link ensures that the fuse tube remains securely closed. When faults occur, fault currents rapidly melt the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing copious 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 switch off during cutout loading, operators use an insulating bar to pull the moving contact. Initially, the main contact and auxiliary static contact stay 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 unparalleled excellence in the dynamic field of electrical integration. As a prestigious high-tech enterprise, we are fervently committed to fostering innovation, a commitment supported by our distinguished team who excel in research and development, production, and exemplary service. With a legacy of over 15 years of invaluable experience, we are not merely participating in the industry; we are revolutionizing it, consistently setting new benchmarks of excellence.
Our expansive range of products is a testament to our unwavering commitment to excellence. We offer an elite selection of high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, and state-of-the-art gas-insulated switchgear. Also included in our lineup are advanced substations, each product meticulously designed to meet the diverse needs of various industries. From the dynamic energy and chemical sectors to robust metal smelting enterprises and expansive electric power grids, our solutions are redefining capabilities. Our cutting-edge offerings are integral to industrial manufacturing, esteemed universities, pioneering research institutions, and thriving medical and pharmaceutical sectors. In municipal commerce, water conservancy and hydropower, intricate road traffic systems, and an array of commercial and residential areas, our products deliver unmatched reliability and efficiency, setting us apart as leaders in the field.
At Zhejiang ChaoTai, our steadfast commitment to technological innovation and a progressive 'smart manufacturing' philosophy propels us to attract top-notch technical talent. This empowers us to elevate our core competitiveness, providing unparalleled value to our clients and solidifying our position as an industry leader. From humble beginnings, we have embarked on an extraordinary journey of growth, embracing a modern business model rooted in quality, market foresight, and efficiency through meticulous management. Our core ethos is founded on the prioritization of technology, adherence to standardized management, delivery of exceptional quality, and ensuring customer satisfaction. With integrity as our foundation, quality as our strength, and customer satisfaction as our ongoing mission, we strive to excel, innovate, and build a brand synonymous with trust. We extend our heartfelt gratitude to all our esteemed customers for their unwavering support and loyalty. Together with Senhang Technology, we are poised to forge 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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