Product Description
General
The Drop-out Fuse and Load Drop-out Fuse are essential outdoor high-voltage electrical protection devices. Strategically installed on the high-voltage side of distribution transformers or on distribution line support links, they serve as critical safeguards against short circuits and overloads in transformers and lines. Constructed with a robust insulating bracket and a sophisticated fuse tube, their static contacts are firmly positioned at each end of the insulation bracket. The moving contacts are expertly mounted on both ends of the fuse tube, which itself comprises an inner arc tube alongside an outer tube made from either phenolic paper or epoxy glass cloth. The Load Drop-out Fuse enhances operational flexibility with auxiliary contacts and an arc chute, facilitating seamless current operations.
During normal operations, the drop-out fuse remains in a closed position, maintained by the tension of the fuse tube. Upon system failure, the fault current promptly melts the fuse, rapidly forming an arc. This arc combusts within the arc tube, generating significant gas decomposition and high pressure, which drives a vertical wind along the tube, swiftly elongating the arc. Once the fuse blows, the moving contact loses its tension, triggering the locking mechanism. This release causes the fuse tube to drop, creating an open position. To pull the load, an insulating rod is used to disengage the moving contact. Initially, the moving and static contacts remain connected. Continued rod operation separates the auxiliary contacts, forming an arc in the hood slit infused with gas, efficiently extinguishing the arc when the current reaches zero.
Use and Standards
This innovative product is specifically designed for use in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It provides unprecedented overload and short circuit protection, enabling both separation and combination of the rated load current.
The meticulous design of this product adheres to the rigorous standards set by JB/T8321-1996 for the preparation of type AC high-voltage fuses. The product parameters conform to the GB15166.3-1994 standards for high voltage expulsion fuses. In cases where these standards do not define critical parameters and configurations, adaptations are made according to the JB/DQ2139-1986 interim technical requirements for 10 to 35KV outdoor high voltage drop fuses.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are robust outdoor high voltage protective devices, meticulously engineered to connect with incoming feeders of distribution transformers or distribution lines. Their primary function is to safeguard against transformer or line short circuits, overloads, and to manage on/off loading of current. Each Cutout is constructed with insulating insulator supports and a durable fuse tube, with static contacts securely fixed on either side of the insulator support and moving contacts installed on either end of the fuse tube. The fuse tube is composed of an advanced inside arc-extinguishing tube, encased in an outer phenolic compound paper or epoxy glass tube. The Load Switching Fuse Cutout is further enhanced with enforced elastic auxiliary contacts and an arc-extinguishing enclosure, facilitating efficient switching of load currents.
Under normal operation, the fuse link secures the fuse tube tightly to maintain a closed position. Upon detecting a fault, the fault current swiftly melts the fuse, triggering an electric arc. This process heats the arc-extinguishing tube, resulting in the rapid release of gas and high-pressure formation, which propels the arc to extend along the tube. When the fuse link melts, the moving contact loses its tension, and the mechanism locks, allowing the fuse tube to drop, signifying an open position. For switching off during cutout loading, operators use an insulating operating bar to disengage the moving contact. Initially, the main and auxiliary static contacts remain engaged. As the bar continues to pull, the auxiliary contacts separate, creating an arc that lengthens within the arc-extinguishing enclosure gap. The enclosure then releases gas to extinguish the arc effectively as the current passes 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 proudly as a beacon of high-tech innovation, dedicated to the nuanced art of electrical integration. With an expert team specializing in research and development, production, and service, we bring to the table an impressive 15-year legacy of industry expertise.
Our exceptional product range includes high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, and cutting-edge gas-insulated switchgear and substations. These products are the lifeblood of industries, finding indispensable applications across energy and chemical sectors, metal smelting, electric power grids, and industrial manufacturing. Our innovations extend to prestigious universities and research institutions, the dynamic medical and pharmaceutical arenas, as well as municipal commerce. We play a vital role in water conservancy and hydropower, road traffic management, and the thriving commercial and residential sectors.
At the heart of our philosophy is a steadfast commitment to technological innovation, upholding the 'smart manufacturing' vision. By recruiting top-tier technical talent, we enhance our core competitiveness, delivering unparalleled value to our clients. Our journey is one of ceaseless progress—from inception to excellence—underpinned by a devotion to innovation. We navigate the modern business landscape by championing quality-driven survival, market-oriented strategies, reputation-fueled growth, and efficiency through meticulous management. Our creed is centered on 'technology-led guidance, standardized management, superior quality, and customer satisfaction.' These principles fortify our position in the market, empowering us to serve China's electric power and grid transmission sectors with unrivaled speed, strength, and ambition. Integrity forms our foundation, with quality as our cornerstone, service as our hallmark, and customer satisfaction as our perpetual aim. We pursue excellence with relentless zeal, continually innovating to forge a brand synonymous with trust. Your acknowledgment propels us forward, and we express profound gratitude to our valued customers—both new and longstanding—for their unwavering support. As we journey towards a brighter future, Senhang Technology eagerly anticipates collaborative success, hand in hand with you.
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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