Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage electrical protection solutions. These devices are expertly positioned on the high-voltage side of distribution transformers or as indispensable links in distribution lines. Engineered to protect against transformer and line short circuits and overloads, they also facilitate the smooth opening and closing of current loads. The drop-out fuse showcases an intelligent design featuring an insulating bracket and fuse tubes, with static contacts secured at both ends of the bracket and moving contacts at the ends of the fuse tube. The fuse tube's construction includes an internal arc tube along with an exterior made from either phenolic paper tubes or epoxy glass cloth tubes. The Pull Load Drop-out Fuse is equipped with superior flexibility, featuring auxiliary contacts and an arc chute, precisely crafted for flawless current load operations.
In standard operation, the drop-out fuse remains firmly closed with the fuse tube under tension. Should a system anomaly arise, the fault current blows the fuse, generating an arc that activates the arc tube, leading to the decomposition of large gas volumes. This creates high pressure inside the tube, forming a vertical wind path that significantly stretches and elongates the arc. After the fuse blows, the moving contact releases tension and rotates outward, while the locking mechanism disengages, allowing the fuse tube to drop and break the circuit. When load pulling is necessary, an insulating rod is used to pull the moving contact, maintaining its connection with the static contact. As the auxiliary contacts are pulled apart, an arc forms, stretching within the hood slit. The arc cover aids in arc extinguishment by containing gas, enabling the current to reach zero effortlessly.
Use and Standards
This exceptional product is engineered for deployment in 10 to 35KV distribution lines, including branching lines and on the primary side of distribution transformers. It delivers unparalleled protection against overloads and short circuits while allowing the seamless separation and combination of the rated load current.
Crafted with precision, this product strictly follows the JB/T8321-1996 Method for AC high-voltage fuse preparation. The product parameters are thoroughly aligned with GB15166.3-1994 high voltage fuses Expulsion fuses standards. Where the standards lack thorough definitions, adjustments are deftly made in accordance with the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are the ultimate outdoor high-voltage protective devices. Intended to connect with the incoming feeders of distribution transformers or lines, they are vital in shielding transformers and lines from short circuits and overloads while mastering the on/off load current. The drop-out fuse cutout comprises insulating supports and a fuse tube, with static contacts firmly fixed on both sides and moving contacts at the tube ends. The internal arc-extinguishing tube is complemented by an outer layer made from phenolic compound paper or epoxy glass tube. The load switching fuse cutout integrates elastic auxiliary contacts and an advanced arc-extinguishing enclosure for effective current switching.
Under usual operational conditions, the fuse link ensures the fuse tube remains tight, securing a closed position. Upon fault occurrence, the fault current quickly melts the fuse, initiating an electric arc. This heats the arc-extinguishing tube, releasing substantial gas volumes, creating high pressure, and elongating the arc throughout the tube. Once the fuse link melts, the moving contact loses its tension, the mechanism locks, and the fuse tube drops, switching to an open position. For load switching during cutout, an insulating operating bar is utilized to pull the moving contact, initially keeping the main contact engaged with the auxiliary static contact. As the auxiliary contact is further engaged, an electric arc forms and stretches within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism expels gas, efficiently extinguishing the arc 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 beacon of innovation and excellence in the electrical integration industry. As a dynamic high-tech enterprise, we boast a dedicated R&D, production, and service team, enriched by more than 15 years of industry expertise.
Our diverse product range includes high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and robust substations. These high-performance products play a vital role across numerous sectors, including the energy and chemical industries, metal smelting, vast electric power grids, industrial manufacturing, and esteemed universities and research institutions. Additionally, our solutions empower the medical and pharmaceutical sectors, bolster municipal commerce, enhance water conservancy and hydropower projects, optimize road traffic systems, and enrich commercial and residential developments.
With an unwavering commitment to technological innovation and the philosophy of smart manufacturing, we are dedicated to attracting top technical talent to holistically enhance our company's core competitive edge. We are devoted to delivering unmatched value to our clients and aspire to forge the industry's most esteemed brand. Since our inception, we have made relentless progress, journeying from inception to excellence. Our path is fueled by innovation and sustained by a modern business ethos, emphasizing quality as our lifeline, market orientation, reputation-driven development, and management-driven efficiency. We steadfastly uphold our commitment to 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' as our core principles in quality and technical talent management, diligently working to bolster our market presence. Our mission is to serve China's electric power and grid transmission and distribution fields with increasing speed, strength, and ambition. At our core, integrity is non-negotiable, quality is sacred, service is paramount, and customer satisfaction is our eternal creed. Our pursuit of excellence, relentless innovation, and dedication to building a trustworthy brand remain our guiding principles. Your recognition fuels our progress. We extend our heartfelt gratitude to all our loyal clients for their enduring support, and Senhang Technology is eager to collaborate with you to create a brighter future together.
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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