Product Description
General
Our Drop-out Fuse and Pull Load Drop-out Fuse epitomize outstanding solutions for outdoor high-voltage electrical protection. Designed for strategic placement on the high-voltage side of distribution transformers or as vital links in distribution lines, they function as essential defenses against transformer and line short circuits, and overload conditions, while facilitating the seamless opening and co-loading of current. These fuses are meticulously engineered with an insulating bracket and robust fuse tubes, featuring static contacts at both ends of the bracket and dynamic contacts at the ends of the fuse tube. The fuse tube is composed of a sophisticated inner arc tube paired with an outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse is enhanced with flexible auxiliary contacts and an arc chute, exquisitely crafted for smooth current load operations.
In typical operations, our drop-out fuse remains firmly closed with the fuse tube under tension. Upon encountering system malfunctions, the fault current promptly blows the fuse, sparking an arc. This arc activates the arc tube, leading to the disintegration of significant gas volumes, which build high pressure within the tube, creating an efficient vertical wind path. This ingenious process rapidly extends and elongates the arc. Once the fuse is blown, the moving contact releases its grip and swings outward, as the locking system disengages, allowing the fuse tube to drop, reaching a break position. For load pulling, an insulating rod pulls the moving contact while it stays in touch with the static contact. With gradual force, the auxiliary contacts detach, generating an arc between them that elongates within the hood slit. The arc cover, filled with gas, assists in arc extinguishment as the current declines to zero.
Use and Standards
This esteemed product is expertly engineered for 10 to 35KV distribution lines, including branching lines and on the primary side of distribution transformers. It delivers formidable protection against overloads and short circuits, while facilitating efficient separation and combination of the rated load current.
This product's precise design conforms to the JB/T8321-1996 Method for AC high-voltage fuse preparation, with parameters aligned with GB15166.3-1994 high voltage fuses Expulsion fuses standards. Where standards lack specifics on critical parameters and configurations, modifications are made per 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 distinguished outdoor high-voltage protective devices. Designed to connect with the incoming feeder of distribution transformers or lines, they serve an essential role in shielding transformers and lines from short circuits and overloads while handling on/off load currents. The drop-out fuse cutout consists of insulating insulator supports and a fuse tube, with static contacts anchored on both sides of the insulator support and moving contacts at the ends of the fuse tube. It includes an internal arc-extinguishing tube with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout features robust elastic auxiliary contacts and an arc-extinguishing enclosure for efficient on-off load current management.
Under normal conditions, the fuse link ensures the fuse tube remains tight to keep a closed position. When faults arise, the fault current immediately melts the fuse, creating an electric arc. This heats the arc-extinguishing tube, releasing a substantial volume of gas, generating high pressure, and extending the arc within the tube. Once the fuse melts, the moving contact loses tension, allowing the locking mechanism to activate and the fuse tube to drop, shifting to an open position. For load switching during cutout, operators use an insulating operating bar to withdraw the moving contact. Initially, the main contact engages with the auxiliary static contact. As the auxiliary contact is further withdrawn, an electric arc forms between the auxiliary contacts, stretching within the arc-extinguishing enclosure gap. Meanwhile, the arc-extinguishing mechanism expels gas to extinguish 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 cutting-edge innovation and superior quality in electrical integration. As a dynamic high-tech enterprise, we proudly feature a highly experienced R&D, production, and service team, drawing upon over 15 years of focused industry expertise.
Our extensive suite of products 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 solutions are indispensable across a diverse range of sectors, including energy and chemical industries, metal smelting, expansive electric power grids, industrial manufacturing, and prestigious universities and research institutions. Our offerings further extend to empowering medical and pharmaceutical fields, strengthening municipal commerce, enhancing water conservancy and hydropower projects, optimizing road traffic systems, and enriching both commercial and residential developments.
Anchored in our unwavering commitment to technological innovation and the ethos of 'smart manufacturing,' we are focused on attracting top-tier technical talent to comprehensively enhance our company's core competitive strength. Our unwavering dedication to delivering exceptional value to our clients drives our ambition to create the most esteemed brand in the industry. From our inception, our journey has been marked by a relentless pursuit of excellence, anchored in a modern business ethos that prioritizes quality as our lifeblood, market-driven strategies, reputation-enhanced growth, and management-led efficiency. Our guiding tenets of 'technology as the guide, standardized management, exemplary quality, and customer satisfaction' are central to our quality and technical talent management as we continually strive to reinforce our market standing. Our mission is to serve China's electric power and grid transmission and distribution sectors with increasing speed, strength, and ambition. At the heart of our operations, integrity is non-negotiable, quality is inviolable, service is paramount, and customer satisfaction is our perpetual creed. Our unwavering quest for excellence, relentless innovation, and commitment to building a trusted brand are our guiding principles. Your recognition fuels our progress. We express deep gratitude to our loyal clients for their unwavering support, and Senhang Technology eagerly looks forward to collaborating with you to shape 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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