Product Description
General
The drop-out fuse and pull load drop-out fuse are pivotal guardians of outdoor high-voltage electric systems. Expertly designed for placement on the high-voltage side of distribution transformers or within distribution lines, they offer robust protection against transformer and line short circuits, as well as overloads, all while managing open-circuit load currents with exceptional precision. Their construction boasts an insulating bracket and fuse tubes; static contacts are firmly positioned at each end of the insulation bracket, with moving contacts at the fuse tube's extremities. Ingeniously engineered, the fuse tube features an inner arc tube enveloped by a phenolic paper tube or epoxy glass cloth tube. The pull load drop-out fuse is crafted for operational excellence, boasting agile auxiliary contacts and an arc chute that enhance operational flexibility, particularly for handling open or co-load currents.
During routine operations, the drop-out fuse remains closed, keeping the fuse tube and fuse securely in place. Upon system fault occurrence, the fault current swiftly melts the fuse, generating an arc. The arc's intense heat causes a surge of gas from the arc tube, elevating its internal pressure. This action initiates a vertical airflow through the pipeline, effectively stretching and elongating the arc. As the fuse blows, the moving contact's tension is released, triggering the locking mechanism that releases the fuse tube, guiding it to a breaking position. For load release, an insulating rod is used to disengage the moving contact, initially keeping its connection with the static contact. Continuous pulling with the rod allows the auxiliary contacts to detach, forming and lengthening an arc within the hood slit. The arc cover's gas plays a crucial role in extinguishing the arc as the current subsides to zero.
Use and Standards
This product's ingenious design makes it perfect for 10 ~ 35KV distribution lines, branching lines, and the main sides of distribution transformers. It serves as a steadfast protector against overloads and short circuits, while masterfully managing the connection and disconnection of rated load currents.
Aligned with exemplary standards, this product model conforms to the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is meticulously crafted to satisfy the stringent GB15166.3-1994 high voltage fuses expulsion fuses standards. In cases where standards obscure critical parameters and configurations, precision adjustments are executed per JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology.
Drop-out fuse cutouts and load switching fuse cutouts are indispensable for outdoor high voltage protection. Strategically integrated into the incoming feeder of distribution transformers or lines, they provide essential defense against short circuits and overloads while efficiently managing on/off load currents. The drop-out fuse cutout features insulating insulator supports and a fuse tube; static contacts are securely positioned on either side of the support, with moving contacts at the fuse tube's ends. The fuse tube’s complex design includes an inner arc-extinguishing tube, enveloped 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 on-off load current management.
Under standard conditions, the fuse link ensures the fuse tube remains securely closed. When faults occur, fault currents promptly melt the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing abundant gas. This high pressure propels the arc along the tube. Upon fuse link melting, the moving contact loses tension, activating the lock mechanism, and the fuse tube drops out, transitioning the cutout to an open state. For switch-off during loading, operators use an insulating bar to pull the moving contact. Initially, the main and auxiliary static contacts remain engaged, but further pulling disengages the auxiliary contacts, creating an electric arc that elongates in the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism releases gas, ensuring arc extinction 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 luminous beacon in the landscape of electrical integration. As a prestigious and pioneering high-tech enterprise, we are dedicated to the pursuit of innovation, supported by a distinguished team that excels across research and development, production, and outstanding service. With over 15 years of profound experience, we are at the forefront of revolutionizing the industry, establishing new benchmarks of excellence and innovation.
Our extensive product range is a testament to our relentless commitment to excellence. It showcases premium high-voltage solid-state soft starters, sophisticated capacitor cabinets, and versatile high and low voltage switchgear. Our cutting-edge gas-insulated switchgear and state-of-the-art substations are specifically tailored to meet the diverse needs of various industries. From the dynamic energy and chemical fields to the robust realms of metal smelting and expansive electric power grids, our solutions redefine industry standards. Our advanced offerings are integral to industrial manufacturing, esteemed universities, and pioneering research entities, as well as flourishing medical and pharmaceutical sectors. In the municipal commerce sector, water conservancy and hydropower, road traffic systems, and a vast array of commercial and residential areas, our products provide unmatched reliability and efficiency, setting the gold standard in performance.
At Zhejiang ChaoTai, our steadfast commitment to technological innovation and a forward-thinking 'smart manufacturing' philosophy drives us to attract top technical talent. This empowers us to enhance our core competitiveness, delivering unparalleled value to our clients while solidifying our leadership position within the industry. From modest beginnings, we have embarked on an extraordinary journey of growth, embracing a contemporary business model built on quality, insightful market foresight, and efficiency through meticulous management. Our ethos is firmly grounded in prioritizing technology, adhering to standardized management, delivering exceptional quality, and ensuring customer satisfaction. With integrity as our cornerstone, quality as our strength, and customer satisfaction as our mission, we strive to excel, innovate, and build a brand synonymous with trust. Our heartfelt gratitude extends to all our esteemed customers for their unwavering support and loyalty. Together with Senhang Technology, we stand 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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