Product Description
General
The Drop-out Fuse and Load Drop-out Fuse are indispensable outdoor high-voltage protective solutions. Strategically positioned on the high-voltage side of distribution transformers or along distribution lines, these fuses offer robust protection against transformer and line short circuits, overloads, and operational current management. Built from a resilient insulating bracket and sturdy fuse tubes, static contacts are securely mounted at both ends of the bracket while dynamic contacts are found at the tube ends. Each fuse tube is ingeniously constructed from an inner arc-extinguishing tube coupled with an outer protective layer of phenolic paper or epoxy glass cloth. The Load Drop-out Fuse features enhanced flexibility through auxiliary contacts and an arc chute, ensuring superior performance in operational current scenarios.
During standard operation, the fuse tube, taut with fuse tension, remains securely closed. In the event of a system fault, the fault current efficiently ruptures the fuse, resulting in the formation of an arc. This triggers the arc tube to combust due to the arc's energy, discharging substantial gas quantities and creating internal pressure. Consequently, this pressure generates a vertical airflow along the tube, swiftly stretching and elongating the arc. Once the fuse has blown, the moving contact is released from tension, activating the locking mechanism to release the fuse tube, allowing it to drop and establish an open position. For load switching, an insulating rod effortlessly manipulates the moving contact. Initially, this keeps the moving and static contacts engaged; however, continued manipulation separates the auxiliary contacts, resulting in an arc that extends within the hood slit. This arc is efficiently quenched when the current subsides.
Use and Standards
This sophisticated product is expertly engineered for deployment in 10 ~ 35KV distribution lines, branching circuits, and on the primary side of distribution transformers. It provides steadfast protection against overloads and short circuits while facilitating the seamless separation and combination of rated load currents.
The product model adheres to the JB/T8321-1996 guidelines for AC high-voltage fuse preparation. In terms of parameters, it complies with the GB15166.3-1994 standards for high-voltage expulsion fuses. As certain critical parameters and configurations remain unspecified, adaptations are made according to the JB/DQ2139-1986 interim technological requirements for 10 ~ 35KV outdoor high-voltage drop fuses.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are critical outdoor high-voltage protective devices designed to interface with incoming feeder distribution transformers or lines. Primarily, they safeguard transformers and lines against short circuits, overloads, and manage operational current dynamics. The Drop-out Fuse Cutout consists of resilient insulated supports and a fuse tube. Static contacts are firmly attached to both sides of the insulator support, while the moving contact is precisely installed on each tube end. The fuse tube comprises an inside arc-extinguishing tube, complemented by an outer layer of phenolic compound paper or epoxy glass. The Load Switching Fuse Cutout boasts reinforced elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring smooth on-off load current transitions.
Under standard conditions, the fuse tube remains securely tightened by the fuse link to form a closed position. Upon system fault detection, the fault current rapidly melts the fuse link, creating an electric arc that heats the arc-extinguishing tube and expels a significant volume of gas. This generates high pressure, propelling the arc along the tube. Following the melting of the fuse link, the moving contact loses tension, activating the lock mechanism to drop the fuse tube, thus positioning the cutout in an open state. When load switching is necessary, operators employ an insulating bar to manipulate the moving contact. Initially, the main and auxiliary contacts remain engaged. However, as the auxiliary contact is pulled apart, an arc forms between them, stretching within the arc-extinguishing enclosure gap. Simultaneously, gas is expelled to extinguish the arc at current 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 beacon of innovation in electrical integration. As a distinguished high-tech enterprise, we proudly present our specialized R&D, production, and service team, boasting over 15 years of unparalleled industry expertise. Immerse yourself in our world of technological advancement and superior service quality.
Discover the brilliance of our main product line, featuring cutting-edge high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and robust substations. Our products are the backbone of numerous sectors: from the dynamic energy and chemical industries to the intense environment of metal smelting, from the expansive electric power grids to the innovative industrial manufacturing. Universities and research institutions, the ever-evolving medical and pharmaceutical sectors, dynamic municipal commerce, strategic water conservancy, and hydropower projects, bustling road traffic systems, to thriving commercial and residential areas—our solutions are everywhere, empowering diverse fields with reliability and efficiency.
At Zhejiang ChaoTai, we are pioneers of technological innovation, passionately driven by our philosophy of 'smart manufacturing.' Our commitment to excellence is reflected in our pursuit of high-level technical talent, sharpening our core competitiveness while delivering unparalleled value to our cherished customers. Our journey from inception to industry leadership is a testament to our relentless pursuit of quality and innovation. We steadfastly adhere to a business ethos centered on quality survival, reputation-driven development, and efficiency through refined management practices. Our unwavering commitment to 'technology as the guide, standardized management, excellent quality, and customer satisfaction' enhances our market competitiveness, allowing us to serve China's electric power and grid transmission sectors with ever-evolving goals of speed, strength, and superiority. Integrity is our cornerstone, quality our hallmark, service our priority, and customer satisfaction our perpetual mission. We are dedicated to pursuing excellence, fostering perpetual innovation, and cultivating a brand synonymous with trust. Your recognition fuels our progress. We extend our heartfelt gratitude to all our esteemed new and longstanding customers for their unwavering support and affection. Together, with Senhang Technology, let's forge a future brimming with possibilities.
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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