Product Description
General
The drop-out fuse and pull load drop-out fuse are indispensable high-voltage protective devices, meticulously engineered to safeguard electric systems. Strategically positioned on the high-voltage side of distribution transformers or within distribution lines, these fuses serve as stalwart defenders against transformer and line short circuits, as well as overloads, while expertly managing open-circuit load currents. Their sturdy and sophisticated construction features an insulating bracket and fuse tubes; static contacts are solidly anchored at each end of the insulation bracket, while moving contacts are gracefully situated at the fuse tube's termini. Ingeniously designed, the fuse tube incorporates an inner arc tube, elegantly encased by an outer phenolic paper tube or an epoxy glass cloth tube. Embodying operational excellence, the pull load drop-out fuse is equipped with nimble auxiliary contacts and an arc chute, enhancing its operational agility and precision, particularly when addressing open or co-load currents.
In routine operations, the drop-out fuse remains closed, ensuring the fuse tube and fuse are snugly secure. Upon the occurrence of a system fault, the fault current rapidly melts the fuse, generating an arc. The arc's intense heat propels a surge of gas from the arc tube, increasing the pressure inside the tube. This triggers a vertical airflow along the pipeline, deftly stretching and lengthening the arc. As the fuse blows, the moving contact loses its tension, activating the locking mechanism, which subsequently frees the fuse tube, guiding it to the breaking position. For load pulling, an insulating rod is employed to disengage the moving contact, initially preserving its connection with the static contact. Continued pulling with the insulating rod causes the auxiliary contacts to disengage, forming and extending an arc within the hood slit. The gas from the arc cover aids in extinguishing the arc when the current diminishes to zero.
Use and Standards
This product exhibits exceptional design, optimized for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It stands as a bastion of protection against overloads and short circuits, while adeptly managing the separation and union of rated load currents.
Complying with exemplary standards, the product model aligns with the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is thoroughly engineered to satisfy the rigorous GB15166.3-1994 high voltage fuses expulsion fuses standards. In cases where standards ambiguously define critical parameters and configurations, precision adjustments are performed 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 vital 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 resilient insulator supports and a fuse tube; static contacts are securely positioned on either side of the insulator support, and moving contacts are stationed at the ends of the fuse tube. The sophisticated design of the fuse tube includes an inner arc-extinguishing tube, skillfully 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 the fuse tube remains securely closed. When faults occur, fault currents swiftly melt the fuse, creating 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 hits 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 excellence within the dynamic field of electrical integration. As a prestigious high-tech enterprise, we are passionately dedicated to continuous innovation. Our acclaimed team excels in research and development, production, and service, ensuring that we remain at the forefront of industry advancements. With over 15 years of invaluable experience, we have redefined industry standards, setting new benchmarks for success and excellence.
Our diverse product range is a true testament to our unwavering commitment to excellence. It features premium high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, and the latest in gas-insulated switchgear technology. Our state-of-the-art substations are expertly tailored to meet the diverse needs of various industries. From the dynamic realms of energy and chemicals to robust metal smelting and expansive electric power grids, our solutions redefine operational capabilities. Our advanced offerings play a pivotal role in industrial manufacturing, esteemed universities, pioneering research entities, and the thriving medical and pharmaceutical sectors. Beyond these, in municipal commerce, water conservancy and hydropower, road traffic systems, and a wide array of commercial and residential areas, our products consistently deliver unmatched reliability and efficiency.
At Zhejiang ChaoTai, our unwavering dedication to technological innovation, coupled with a forward-thinking 'smart manufacturing' philosophy, drives us to attract top-tier technical talent. This empowers us to continually enhance our core competitiveness, delivering unparalleled value to our clients while solidifying our position as a distinguished industry leader. From our humble beginnings, we have embarked on an extraordinary journey of growth, embracing a contemporary business model that is built upon quality, market foresight, and efficiency through meticulous management. Our ethos is grounded in a steadfast commitment to technology prioritization, standardized management practices, exceptional quality, and unwavering 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 that commands trust and respect. Our heartfelt gratitude goes out to all our esteemed customers for their unwavering support and loyalty. Together with Senhang Technology, we are poised to craft a brighter and more promising 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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