Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse serve as robust outdoor high-voltage protection solutions for electrical systems. Strategically placed on the high-voltage side of distribution transformers or at key junctures of distribution lines, they offer reliable short circuit and overload protection. These essential components facilitate the seamless opening and closing of co-load current circuits. Each fuse is crafted with precision, featuring an insulating bracket and durable fuse tubes. Static contacts are secured at each end of the insulation bracket, while moving contacts are expertly integrated at both ends of the fuse tube. The sophisticated design includes an inner arc tube and an outer layer composed of phenolic paper or epoxy glass cloth tubes. The Pull Load Drop-out Fuse is ingeniously designed with flexible auxiliary contacts and an arc chute, enhancing its ability to manage co-load current efficiently.
In normal operation, the drop-out fuse remains in a closed position, held by the tension of the fuse tube. Upon system failure, the fault current swiftly blows the fuse, creating an arc that ignites the arc tube. This process generates a significant amount of gas, creating high pressure within the tube and producing a vertical wind along the pipeline, effectively stretching and elongating the arc. Once the fuse is blown, the moving contact loses tension, triggering the locking mechanism to release the fuse tube, which then drops, creating a breaking position. For load switching, an insulating rod is employed to pull the moving contact. Initially, the moving and static contacts remain connected. With continued pulling, the auxiliary contacts separate, causing an arc to form between them. This arc is stretched along the slit in the arc cover, which contains gas to extinguish the arc when the current reaches zero.
Use and Standards
This exceptional product is tailored for deployment in 10 to 35KV distribution line branches and the primary side of distribution transformers. It offers steadfast protection against overloads and short circuits, ensuring seamless separation and combination of the rated load current.
Our product model is meticulously crafted according to JB/T8321-1996 standards, specifically for AC high-voltage fuses. Product parameters adhere to the esteemed GB15166.3-1994 standards for high voltage expulsion fuses. While these standards do not explicitly define certain crucial parameters and configurations, we ensure compliance through adjustments as per JB/DQ2139-1986 10 to 35KV outdoor high voltage drop fuse interim technology requirements.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are designed as outdoor high voltage protective devices. These components are vital connections to the incoming feeders of distribution transformers or distribution lines. They are primarily tasked with safeguarding transformers and lines against short circuits and overloads while facilitating the on/off loading of current. Each Drop-out Fuse Cutout features robust insulator supports and a sturdy fuse tube. Static contacts are secured on either side of the insulator support, with moving contacts skillfully installed at each end of the fuse tube. The fuse tube itself comprises an interior arc-extinguishing tube and an exterior made from a phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is enhanced with reinforced elastic auxiliary contacts and an arc-extinguishing enclosure, optimizing its performance for switching on and off loading currents.
Under normal operating conditions, the fuse link maintains the fuse tube in a secure close position. In the event of system faults, the fault current causes the fuse to melt instantaneously, generating an electric arc. This arc heats the arc-extinguishing tube, leading to the release of substantial gas, which in turn creates high pressure and facilitates the expulsion of the arc through the tube. After the fuse link melts, the moving contact loses its tension, causing the mechanism to lock and the fuse tube to drop out, transitioning the cutout to an open position. During load switching with the cutout, the operator uses an insulating bar to pull the moving contact. Initially, the main and auxiliary static contacts remain engaged. As the auxiliary contact is pulled apart, an electric arc forms between them. This arc is elongated within the arc-extinguishing enclosure gap, where the arc-extinguishing gas is released to extinguish the arc as the current approaches 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. is a beacon of technological advancement in electrical integration. As a high-tech enterprise, we boast an exceptional R&D team, state-of-the-art production capabilities, and a dedicated service team, all with over 15 years of profound industry expertise.
Our prestigious lineup of products includes high-voltage solid-state soft starters, meticulously crafted capacitor cabinets, versatile high and low voltage switchgear, innovative gas-insulated switchgear, and robust substations. These products have established a strong presence across a plethora of sectors, including but not limited to the energy and chemical industries, metal smelting, and electric power grids. Our solutions power industrial manufacturing, enable universities and research institutions, support the medical and pharmaceutical sectors, and enhance municipal commerce. Our reach extends to water conservancy and hydropower, road traffic systems, and both commercial and residential areas, showcasing the multifaceted applications of our cutting-edge innovations.
With 'smart manufacturing' at the core of our vision, we are steadfast in our commitment to technological innovation. We vigorously attract top-tier technical talents to fortify our competitive edge and offer unparalleled services to our esteemed customers. Our journey from inception to excellence is marked by a relentless pursuit of innovation and adherence to a progressive business philosophy that champions quality for survival, market focus for expansion, reputation for development, and efficiency through strategic management. We are devoted to 'technology as the guide', implementing standardized management practices, ensuring superior quality, and achieving customer satisfaction, thereby significantly boosting our market competitiveness. Our mission is to elevate the transmission and distribution landscape of China's electric power and grid, setting ever higher standards. With integrity as our cornerstone, quality as our creed, and service as our hallmark, customer satisfaction remains our timeless pursuit. Striving for excellence, we continually innovate and are dedicated to forging a brand synonymous with trustworthiness. Your recognition fuels our ambitions. We extend our heartfelt gratitude to both new and loyal customers for their unwavering support and affection. Zhejiang Chaotai Complete Equipment Co., Ltd. eagerly anticipates forging a brighter future together with you, hand in hand.
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}