Product Description
General
The drop-out fuse and pull load drop-out fuse are indispensable outdoor high-voltage protective devices, meticulously designed as the paramount protectors of electrical systems. Strategically positioned on the high-voltage side of distribution transformers or within distribution lines, these fuses offer unparalleled protection against transformer and line short circuits as well as overloads, while expertly handling open-circuit load currents. Featuring a robust construction, the design incorporates an insulating bracket and fuse tubes; the static contact is securely anchored at each end of the insulation bracket, with the moving contact strategically placed at the extremities of the fuse tube. The fuse tube is ingeniously crafted with an inner arc tube surrounded by an outer phenolic paper tube or an epoxy glass cloth tube. For optimal operational performance, the pull load drop-out fuse is equipped with nimble auxiliary contacts and an arc chute, enhancing its operational dexterity, particularly in managing open or co-load currents.
During routine operations, the drop-out fuse remains closed, keeping the fuse tube and fuse under tension. When a system fault occurs, the fault current promptly melts the fuse, creating an arc. The intense heat from the arc causes gas to be expelled from the arc tube, increasing the pressure within the tube. This generates a vertical airflow along the pipeline, effectively stretching and elongating the arc. As the fuse operates, the tension of the moving contact is released, activating the locking mechanism, which in turn releases the fuse tube, guiding it to the breaking position. For load pulling, an insulating rod is used to disengage the moving contact, initially maintaining contact with the static contact. Continued 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 boasts an innovative design specifically tailored for 10 ~ 35KV distribution lines, branch lines, and the primary sides of distribution transformers. It stands as a fortress of protection against overloads and short circuits, while adeptly managing the separation and union of rated load currents.
In 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 comply with the rigorous GB15166.3-1994 high voltage fuses expulsion fuses standards. In instances where standards ambiguously define crucial parameters and configurations, precision 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 on distribution transformers or lines. Seamlessly integrated, these devices offer vital defense against short circuits and overloads, efficiently managing on/off load currents. The drop-out fuse cutout incorporates insulated insulator supports and a fuse tube; static contacts are securely placed on either side of the insulator support, while moving contacts rest at the ends of the fuse tube. The intricate design of the 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 proficient management of on-off load currents.
Under standard operating conditions, the fuse link maintains the fuse tube in a securely closed state. When faults arise, fault currents rapidly melt the fuse, resulting in an electric arc that heats the arc-extinguishing tube, releasing a significant volume of gas. This high pressure propels the arc along the tube. Once the fuse link melts, the moving contact loses tension, activating the mechanism to lock, and the fuse tube drops out, shifting the cutout to an open state. To switch off 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. shines as a beacon of excellence in the electrical integration landscape. As a prestigious high-tech enterprise, we are passionately committed to pioneering innovation, supported by a distinguished team excelling in research and development, production, and exemplary service. With over 15 years of unparalleled experience, we are transforming the industry and establishing new benchmarks of excellence.
Our diverse product range is a testament to our unwavering commitment to quality and innovation, featuring premium high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, and cutting-edge gas-insulated switchgear. Additionally, we offer state-of-the-art substations, all meticulously tailored to meet the varying needs of industries. From the dynamic energy and chemical sectors to robust metal smelting and expansive electric power grids, our solutions redefine industry capabilities. Our advanced offerings are also integral to the industrial manufacturing landscape, esteemed universities, pioneering research entities, as well as the thriving medical and pharmaceutical sectors. In municipal commerce, water conservancy and hydropower, road traffic systems, and a vast array of commercial and residential areas, our products provide unmatched reliability and efficiency.
At Zhejiang ChaoTai, our unwavering commitment to technological innovation and a visionary 'smart manufacturing' philosophy attract the finest technical talent, empowering us to enhance our core competitiveness and deliver unparalleled value to our clients. As an industry leader, from humble beginnings, we have embarked on an extraordinary journey of growth, embracing a contemporary business model centered on quality, market foresight, and efficiency through meticulous management. Our ethos is anchored in prioritizing cutting-edge technology, adhering to standardized management, delivering exceptional quality, and ensuring utmost customer satisfaction. With integrity as our foundation, quality as our strength, and customer satisfaction as our ongoing mission, we aim to excel, innovate, and build a brand that commands trust. Our heartfelt gratitude extends to all our esteemed customers for their steadfast support and loyalty. Together with Senhang Technology, we are poised to craft 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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