Product Description
General
The drop-out fuse and pull load drop-out fuse are quintessential outdoor high-voltage protective devices designed to safeguard and enhance the reliability of electrical systems. These robust fuses are strategically positioned on the high-voltage side of distribution transformers or serve as a critical link within distribution lines, offering unwavering protection against transformer and line short circuits as well as overloads. Not only do they ensure safety, but they also facilitate the smooth handling of open-circuit load currents. Each fuse is meticulously constructed with an insulating bracket and durable fuse tubes. The static contact is securely mounted on both ends of the insulation bracket, while the moving contact resides at the ends of the fuse tube. The fuse tube itself is ingeniously crafted from an inner arc tube, which is enveloped by an outer phenolic paper tube or an epoxy glass cloth tube, assuring durability and performance. Additionally, the pull load drop-out fuse is equipped with nimble auxiliary contacts and an arc chute, enhancing operational versatility, especially when managing open or co-load currents.
During routine operations, the drop-out fuse remains steadfast in a closed position, with the fuse tube and fuse under optimal tension. However, upon the occurrence of a system anomaly, the fault current swiftly melts the fuse, igniting an arc. This arc heats the arc tube intensely, releasing substantial quantities of gas that generate high pressure within the tube. This mechanism creates a vertical wind along the pipeline, skillfully stretching and elongating the arc until its ultimate resolution. When the fuse blows, the moving contact instantly loses tension, triggering the locking mechanism to release the fuse tube, which then falls gracefully into the breaking position. To manage the load, an insulating rod is adeptly used to detach the moving contact, initially maintaining contact with the static contact. As the insulating rod is further pulled, the auxiliary contacts separate, forming and elongating an arc within the hood slit. The gas within the arc cover masterfully facilitates the extinguishing of the arc as the current gracefully reaches zero.
Use and Standards
This product is masterfully engineered for deployment in 10 ~ 35KV distribution lines, branching lines, and on the primary side of distribution transformers. It offers stellar protection against overloads and short circuits while gracefully managing the separation and combination of rated load currents.
The product model is meticulously crafted to conform to the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is meticulously aligned with the GB15166.3-1994 standards for high voltage fuses expulsion fuses. In situations where standards ambiguously define pivotal parameters and configurations, adjustments are made in strict accordance with the JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology, ensuring precision and reliability.
Drop-out fuse cutouts and load switching fuse cutouts stand as critical outdoor high voltage protective devices. These devices are seamlessly integrated into the incoming feeder of distribution transformers or distribution lines, providing essential protection against short circuits and overloads while adeptly managing the on/off loading currents. The drop-out fuse cutout is composed of durable insulate insulator supports and a robust fuse tube, with static contacts firmly secured on both sides of the insulator support and moving contacts elegantly installed at the fuse tube ends. The architecture of the fuse tube includes an inner arc-extinguishing tube wrapped in an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout features reinforced elastic auxiliary contacts and a sophisticated arc-extinguishing enclosure to manage on-off loading currents with precision.
Under standard working conditions, the fuse link ensures the fuse tube is securely maintained in a closed position. When system disruptions occur, the fault current promptly melts the fuse, resulting in the creation of an electric arc that intensely heats the arc-extinguishing tube and liberates a significant volume of gas, generating substantial pressure that propels the arc along the tube. Upon the melting of the fuse link, the moving contact loses its tension, the mechanism locks, and the fuse tube gracefully drops out, transitioning the cutout to an open position. During cutout loading, operators employ a reliable insulating operating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but further pulling seamlessly disengages the auxiliary contacts, generating an electric arc that lengthens within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism releases gas to efficiently extinguish the arc as the current gracefully transitions through 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. has carved a prestigious niche in the realm of electrical integration, standing as a beacon of high-tech excellence. With an illustrious team spearheading our endeavors in R&D, production, and service, we harness more than 15 years of profound expertise to consistently innovate and push the boundaries of industry achievement.
Our product suite is truly unparalleled, featuring a diverse array of offerings such as high-voltage solid-state soft starters, capacitor cabinets, both high and low voltage switchgear, pioneering gas-insulated switchgear, and cutting-edge substations. These remarkable solutions make a significant impact across a myriad of sectors like the dynamic energy landscape, robust chemical industries, resilient metal smelting, extensive electric power grids, and avant-garde industrial manufacturing. Our influence extends to eminent universities, trailblazing research institutions, the burgeoning medical and pharmaceutical fields, as well as municipal commerce. Furthermore, our expertise is indispensable to critical water conservancy and hydropower projects, sophisticated road traffic systems, and a vast expanse of commercial and residential domains.
Propelled by an unyielding quest for technological advancement and an insightful 'smart manufacturing' vision, we are committed to attracting top-tier technical talent. This dedication fortifies our core competitive edge, allowing us to deliver extraordinary value to our clients and strive to position our brand at the pinnacle of the industry. Since our foundation, we have embarked on an extraordinary journey, evolving from modest beginnings to industry-leading stature. Our guiding principles celebrate innovation, with a contemporary business model that emphasizes quality as the cornerstone of survival, market orientation for growth, reputation for development, and efficiency through scrupulous management. Our steadfast promise is to anchor technology as our guiding star, uphold standardized management, ensure exceptional quality, and achieve customer satisfaction. This bolsters our market standing, driving our ambition to support China's electric power and grid sectors with visionary goals. Integrity is our cornerstone, quality is our strength, service is our signature, and customer satisfaction is our enduring commitment. Our unwavering objectives are the relentless pursuit of excellence, continuous innovation, and curating a brand synonymous with trust. Your recognition energizes our path, and we sincerely thank all our valued customers for their steadfast support and loyalty. Alongside Senhang Technology, we eagerly anticipate crafting a brilliant 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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