Product Description
General Information
The Drop-out Fuse and Pull Load Drop-out Fuse serve as robust outdoor high-voltage protective devices for electrical systems. Mounted on the high-voltage side of distribution transformers or as a support link in distribution lines, they offer essential short circuit, overload protection, and current handling capabilities. These fuses consist of insulating brackets and fuse tubes; with static contacts on the bracket's extremities and moving contacts on the fuse tube ends. Crafted from an inner arc tube paired with an outer phenolic paper tube or epoxy glass cloth, the device ensures durability. The Pull Load Drop-out Fuse is engineered with enhanced flexibility, auxiliary contacts, and an arc chute for improved current management.
During standard operations, the fuse tube remains secured in a closed position due to the fuse tension. In the event of a system fault, the fault current swiftly blows the fuse, generating an arc. The arc tube, subjected to this arc, decomposes into large quantities of gas, creating high pressure within, and a vertical wind is formed along the pipeline. This stretches and elongates the arc rapidly. When the fuse blows, the moving contact loses tension and rotates outward, triggering the locking mechanism to release the fuse tube, causing it to drop and create a breaking position. To disengage the load, use an insulating rod to pull the moving contact. Initially, the moving and static contacts remain engaged; however, upon further pulling, the auxiliary contacts separate. An arc appears between the auxiliary contacts, stretches within the hood slit, and is extinguished when the current reaches zero due to the arc cover's gas.
Usage and Compliance Standards
This innovative product is designed for use within 10 to 35KV distribution line branches and the primary side of distribution transformers, providing vital overload and short circuit protection. It facilitates the seamless separation and combination of rated load currents.
The product adheres to the model preparation guidelines outlined in JB/T8321-1996 for AC high-voltage fuses. Developed in accordance with GB15166.3-1994 for Expulsion Fuses standards, this product fills gaps where parameters and configurations are not clearly defined. It incorporates corrections as per JB/DQ2139-1986 requirements, catering to 10 to 35KV outdoor high voltage drop fuse interim technology demands.
Both the Drop-out Fuse Cutout and Load Switching Fuse Cutout are indispensable outdoor high-voltage protective devices. By connecting with the incoming feeder of distribution transformers or lines, they play a crucial role in safeguarding transformers and lines from short circuits and overloads, while managing on/off loading currents. The Drop-out Fuse Cutout comprises insulated supports and a fuse tube, with static contacts fixed on either side of the insulator support, and moving contacts at the tube ends. The fuse tube features an inner arc-extinguishing tube and an outer phenolic compound paper or epoxy glass tube. The Load Switching Fuse Cutout is enhanced with enforced elastic auxiliary contacts and an arc-extinguishing enclosure for efficient current management.
Under normal operating conditions, the fuse link secures the fuse tube in a closed position. However, when system faults occur, the fault current causes the fuse to melt immediately, generating an electric arc. This arc heats the arc-extinguishing tube, releasing a large amount of gas and creating high pressure, blowing the arc along the tube. Once the fuse link melts, the moving contact loses tension, the mechanism locks, and the fuse tube drops, resulting in an open position. For load switching, operators use an insulating operating bar to pull the moving contact. Initially, the main and auxiliary static contacts remain connected; as the auxiliary contact is pulled and separates, an electric arc forms and lengthens in the arc-extinguishing enclosure gap. The arc is extinguished by the gas released, particularly as the current passes 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
Welcome to Zhejiang ChaoTai Complete Equipment Co., Ltd., a pioneering high-tech enterprise specializing in electrical integration. With a dedicated team boasting over 15 years of industry expertise, we excel in R&D, production, and service, continuously driving innovation and excellence in every project.
Our wide portfolio of cutting-edge products includes high-voltage solid-state soft starters, capacitor cabinets, versatile high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and robust substations. These products are integral to diverse sectors such as energy, chemical industries, metal smelting, power grids, and industrial manufacturing. Our influence extends to prestigious universities, leading research institutions, the medical field, municipal commerce, and infrastructure projects in water conservancy, hydropower, road traffic, as well as residential and commercial areas, demonstrating our adaptability and reliability across industries.
Our core philosophy is rooted in technological innovation and 'smart manufacturing,' driving us to attract top-notch technical talent and uplift our core competitiveness. Our mission is to deliver unparalleled value and strive to be the industry's premier brand. Since inception, we've grown remarkably, transforming from inception to excellence. Our modern business strategy is anchored in quality, market orientation, reputation development, and management efficiency. We uphold the principles of 'technology-guided development, standardized management, superior quality, and ultimate customer satisfaction,' enhancing market competitiveness to serve China's electric power transmission and distribution sectors with unparalleled speed and strength. Integrity, quality, service, and customer satisfaction are the cornerstones of our ethos. By pursuing excellence and continuous innovation, we aim to build a trustworthy brand. Your recognition propels us forward. We extend heartfelt appreciation to our valued customers for their unwavering support and invite collaboration towards a brighter future together with Senhang Technology.
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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