Product Description
General Information
Our Drop-Out Fuse and Pull Load Drop-Out Fuse are expertly designed to serve as outdoor high-voltage electrical protection devices. These fuses are strategically installed on the high-voltage side of distribution transformers or the Support Link of distribution lines, providing robust protection against transformer and line short circuits, overloads, and facilitating open and co-load current control. Crafted with precision, the Drop-Out Fuse features an insulating bracket and fuse tubes, with static contacts mounted at both ends of the insulation bracket and moving contacts fitted at both ends of the fuse tube. The fuse tube is intricately constructed with an inner arc tube and an outer phenolic paper tube or epoxy glass cloth tube. Enhanced with flexibility, the Pull Load Drop-Out Fuse includes auxiliary contacts and an arc chute to efficiently manage open and co-load currents.
During standard operations, the Drop-Out Fuse maintains a closed position, with fuse tension keeping the tube secure. In the event of a fault, the fault current swiftly blows the fuse, initiating an arc. The arc tube, ignited by the electric arc, decomposes to release large volumes of gas, generating high pressure within the tube, which extends vertically along the pipeline. This process elongates and stretches the arc rapidly. Once the fuse blows, the moving contact loses tension, triggering the locking mechanism to release the fuse tube, which then drops to form the breaking position. When pulling the load, the operator uses an insulating rod to disengage the moving contact. Initially, the moving and static contacts remain engaged. By continuing to pull with the insulating rod, the auxiliary contacts separate. An arc forms between the auxiliary contacts and extends within the hood slit. As the arc cover contains gas, the arc extinguishes once the current reaches zero.
Usage and Industry Standards
Specifically engineered for 10 ~ 35KV distribution lines, branching lines, and primary sides of distribution transformers, this product excels in providing overload and short circuit protection, as well as handling the separation and combination of rated load currents with unmatched efficiency.
The product model adheres to the specifications of JB/T8321-1996 for AC high-voltage fuses. The parameters align with the GB15166.3-1994 standards for high-voltage expulsion fuses. Although the standards do not explicitly define critical parameters and configurations, adjustments are made in accordance with the interim technology requirements outlined in JB/DQ2139-1986 for 10 ~ 35KV outdoor high voltage drop fuses.
Designed as an outdoor high-voltage protective device, the Drop-Out Fuse Cutout and Load Switching Fuse Cutout seamlessly connect with the incoming feeder of distribution transformers or distribution lines. Their primary function is to safeguard transformers or lines from short circuits and overloads while managing on/off loading currents. Comprising insulator supports and a robust fuse tube, the Drop-Out Fuse Cutout includes static contacts fixed on both sides of the insulator support and moving contacts at both ends of the fuse tube. The fuse tube, equipped with an inside arc-extinguishing tube and an outer phenolic compound paper tube or epoxy glass tube, is complemented by enforced elastic auxiliary contacts and an arc-extinguishing enclosure to efficiently handle switching on-off load currents.
In regular operation, the fuse link secures the fuse tube in a closed position. If the system encounters faults, the resultant fault current causes the fuse to melt instantly, generating an electric arc. This arc heats the arc-extinguishing tube, releasing a significant amount of gas and producing high pressure that pushes the arc along the tube. Once the fuse link melts, the moving contact loses its securing strength, the mechanism locks, and the fuse tube drops, leaving the cutout in an open position. When switching off during cutout loading, the operator uses an insulating operating bar to pull the moving contact. Initially, the main and auxiliary static contacts remain engaged. As the operator continues to pull, the auxiliary contacts separate, forming an electric arc between them. This arc extends in the arc-extinguishing enclosure gap, while the arc-extinguishing process releases gas to extinguish the arc once 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 high-tech innovation in the realm of electrical integration. With a dynamic team boasting over 15 years of extensive industry expertise, we excel in research, development, production, and unparalleled service.
Our distinguished product line features high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, sophisticated gas-insulated switchgear, and comprehensive substations. These offerings are instrumental across diverse sectors, including energy and chemical industries, metal smelting, electric power grids, industrial manufacturing, universities and research institutions, the medical and pharmaceutical fields, municipal commerce, water conservancy and hydropower, road traffic systems, and both commercial and residential areas.
At Zhejiang ChaoTai, we are driven by the pursuit of technological innovation under the philosophy of 'smart manufacturing.' We are dedicated to attracting top-tier technical talents to fortify our competitive edge, delivering unparalleled value to our customers, and establishing ourselves as the industry's leading brand. Our journey from inception to excellence has been marked by continuous growth and innovation. Embracing a modern business strategy, we thrive on quality for survival, reputation for development, and management for efficiency. We are devoted to 'technology-led guidance, standardized management, superior quality, and unwavering customer satisfaction.' Our commitment to quality and exceptional technical talent ensures robust market competitiveness, empowering us to serve China's electric power and grid transmission and distribution fields with ever-advancing goals. Integrity is our cornerstone, quality is our promise, and unmatched service is our pledge. We are steadfast in our pursuit of excellence, relentless innovation, and the cultivation of a brand worthy of trust. Your recognition fuels our passion. We extend heartfelt gratitude to our valued customers, both new and longstanding, for their unwavering support and loyalty. At Zhejiang ChaoTai, we eagerly anticipate forging a bright 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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