Product Description
General
The drop-out fuse and pull load drop-out fuse are indispensable outdoor high-voltage protective devices, expertly crafted to serve as the stalwart guardians of electric systems. When strategically positioned on the high-voltage side of distribution transformers or within distribution lines, these fuses provide formidable protection against transformer and line short circuits as well as overloads, while adeptly managing open-circuit load currents. Their rugged construction includes an insulating bracket and fuse tubes; static contacts are securely anchored on each end of the insulation bracket, while moving contacts are positioned at the fuse tube's extremities. Ingeniously designed, the fuse tube features an inner arc tube shielded by an outer phenolic paper tube or an epoxy glass cloth tube. Engineered for operational brilliance, the pull load drop-out fuse is equipped with agile auxiliary contacts and an arc chute, enhancing its operational flexibility, particularly when dealing with open or co-load currents.
In routine operations, the drop-out fuse remains closed, maintaining the fuse tube and fuse in a taut state. When a system fault arises, the fault current rapidly melts the fuse, initiating the formation of an arc. The arc's intense heat causes a release of gas from the arc tube, elevating the pressure within the tube. This process initiates a vertical airflow along the pipeline, which skillfully stretches and lengthens the arc. As the fuse blows, the tension of the moving contact dissipates, activating the locking mechanism, which then releases the fuse tube, guiding it into the breaking position. For load pulling scenarios, an insulating rod is used to disengage the moving contact, initially preserving its connection with the static contact. Continued pulling with the insulating rod results in the auxiliary contacts disengaging, forming and elongating an arc within the hood slit. The gas within the arc cover facilitates the arc's extinction when the current decreases to zero.
Use and Standards
This product stands out with its innovative design, meticulously tailored for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It serves as a stalwart defense against overloads and short circuits, while adeptly managing the separation and union of rated load currents.
Adhering to exemplary standards, the product model is in harmony 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. In instances where 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 insulation 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, 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, activating 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 paragon of innovation and excellence within the electrical integration sphere. As a revered high-tech enterprise, our hallmark is pioneering innovation, driven by an elite team proficient in R&D, production, and stellar service. With a remarkable legacy spanning over 15 years, we are not just participants but revolutionaries in the industry, continuously raising the bar of excellence and setting unprecedented standards.
Our diverse product offering epitomizes our dedication to unmatched quality and innovation. We showcase an array of premium solutions including high-voltage solid-state soft starters, cutting-edge capacitor cabinets, adaptable high and low voltage switchgear, and advanced gas-insulated switchgear. Our portfolio extends to state-of-the-art substations, meticulously designed to cater to the varied demands of multiple sectors. Whether in the dynamic energy and chemical industries, robust metal smelting, or expansive electric power grids, our solutions are synonymous with capability enhancement. Additionally, our sophisticated offerings are pivotal in industrial manufacturing, esteemed universities, groundbreaking research institutions, and the flourishing medical and pharmaceutical domains. Across municipal commerce, water conservancy and hydropower, road traffic networks, and a myriad of commercial and residential landscapes, our products deliver unparalleled reliability and efficiency, setting a new benchmark for excellence.
At the core of Zhejiang ChaoTai is an unwavering commitment to technological advancement and a visionary 'smart manufacturing' philosophy. This commitment drives us to attract top-tier technical talent, bolstering our core strengths and delivering unmatched value to our clients. As an industry forerunner, our journey from modest beginnings has been nothing short of extraordinary. Embracing a modern business ethos rooted in quality focus, market acuity, and efficient management, we champion technology prioritization and uphold standardized management practices. Our promise is embodied in delivering superior quality and achieving customer satisfaction. Integrity forms our foundation, quality fuels our strength, and customer satisfaction remains our relentless pursuit. We strive to excel, innovate, and craft a brand that inspires trust. With heartfelt appreciation, we thank our esteemed clients for their unwavering support and loyalty. In partnership with Senhang Technology, we are set to pave the way for a brighter and more innovative future, collaboratively shaping a prosperous tomorrow!
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.
Audited Supplier 
){kind=link}