Product Description
General
Introducing the Drop-out Fuse and Pull Load Drop-out Fuse, the ultimate solutions in outdoor high-voltage electrical protection. Designed with precision, these devices are ideally situated on the high-voltage side of distribution transformers or as vital components in distribution lines. They provide essential protection against transformer and line short circuits, and overload conditions, while expertly managing the opening and co-loading of current. The drop-out fuse features an innovative design with an insulating bracket and fuse tubes. Static contacts are securely mounted at both ends of the bracket, while moving contacts are attached to the ends of the fuse tube. The fuse tube is meticulously crafted with an inner arc tube and an outer layer made from phenolic paper or epoxy glass cloth. The Pull Load Drop-out Fuse offers enhanced versatility, incorporating auxiliary contacts and an arc chute for smooth current load operations.
In regular operations, the drop-out fuse is firmly held closed with the fuse tube under tension. When a system fault occurs, the fault current swiftly blows the fuse, creating an arc. This arc energizes the arc tube, leading to the decomposition of substantial gas volumes, which generates high pressure and forms a vertical wind path. This ingenious mechanism rapidly stretches and elongates the arc. Once the fuse has melted, the moving contact releases tension and pivots outwards, with the locking mechanism disengaging, allowing the fuse tube to drop and break the circuit. For load pulling, an insulating rod is utilized to move the contact, retaining its engagement with the static contact. With continued pulling, the auxiliary contacts are separated, forming an arc stretched within the hood slit. The arc cover, filled with gas, aids in extinguishing the arc as the current reaches zero.
Use and Standards
This exceptional product is engineered for use in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It delivers reliable protection against overloads and short circuits, while facilitating efficient separation and combination of the rated load current.
Engineered with precision, this product adheres to the JB/T8321-1996 Method for AC high-voltage fuse preparation, aligning its product parameters with the GB15166.3-1994 high voltage fuses Expulsion fuses standards. When the standards do not delineate detailed parameters and configurations, adjustments are made according to 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 represent the pinnacle of outdoor high-voltage protective devices. Masterfully crafted to connect with the incoming feeder of distribution transformers or lines, they are indispensable for protecting transformers and lines from short circuit and overload conditions, while adeptly managing on/off load current. The drop-out fuse cutout includes insulating insulator supports and a fuse tube with static contacts steadfastly fixed on both sides of the support and moving contacts at the ends of the fuse tube. The tube is equipped with an internal arc-extinguishing tube and an outer phenolic compound paper or epoxy glass tube. The load switching fuse cutout further features robust auxiliary contacts and an arc-extinguishing enclosure for seamless on-off load current switching.
Under normal conditions, the fuse link ensures that the fuse tube remains tightly closed. In the event of a fault, the fault current promptly melts the fuse, creating an arc that heats the arc-extinguishing tube, releasing significant gas volumes, and building high pressure that elongates the arc throughout the tube. After the fuse link melts, the moving contact releases tension, enabling the locking mechanism to release and the fuse tube to drop out to an open position. For load switching during cutout, operators employ an insulating operating bar to pull the moving contact. Initially, the main contact stays engaged with the auxiliary static contact. As further movement separates the auxiliary contact, an arc forms between them, lengthening within the arc-extinguishing enclosure gap. Concurrently, 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., renowned for its innovation and excellence, stands as a beacon in the electrical integration industry. As a dynamic, high-tech enterprise, we are proud of our experienced R&D, production, and service team, enriched with over 15 years of dedicated expertise.
Our extensive product range features high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These high-performance solutions are essential across diverse sectors, including energy, chemical industries, metal smelting, expansive electric power grids, industrial manufacturing, and top-tier universities and research institutions. Furthermore, our innovations elevate the medical and pharmaceutical fields, enhance municipal commerce, fortify water conservancy and hydropower projects, optimize road traffic systems, and enrich both commercial and residential developments.
Anchored by a resolute commitment to technological innovation and the philosophy of 'smart manufacturing,' we focus on attracting premier technical talent to enhance our core competitive edge. Our unwavering dedication is to deliver unmatched value to our clients and to establish the most prestigious brand in the industry. Since our founding, we have made relentless strides, transitioning from inception to excellence. Our journey is marked by a commitment to innovation, a modern business ethos, and an emphasis on quality as our lifeline, market orientation, reputation-driven growth, and management-driven efficiency. We uphold 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' as our unwavering tenets in quality and technical talent management, diligently strengthening 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 unwavering, quality is sacred, service is paramount, and customer satisfaction is our eternal aim. Our pursuit of excellence, relentless innovation, and commitment to a trustworthy brand are 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 eagerly anticipates collaborating with you to forge 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.
Audited Supplier 
){kind=link}