Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are paramount solutions for outdoor high-voltage electrical protection. These devices are expertly engineered to be strategically positioned either on the high-voltage side of distribution transformers or as indispensable support links in distribution lines. They serve as pivotal safeguards against transformer and line short circuits and overload conditions, and they facilitate the seamless opening and co-loading of current. The drop-out fuse is masterfully crafted using an insulating bracket and fuse tubes, with static contacts meticulously affixed at both ends of the bracket, while moving contacts are attached to the ends of the fuse tube. The construction of the fuse tube boasts an inner arc tube elegantly coupled with an outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse excels with enhanced flexibility through auxiliary contacts and an arc chute, specifically designed for flawless current load operations.
During standard operations, the drop-out fuse remains securely held in a closed position, with the fuse tube meticulously tensioned. Upon system malfunction, the fault current swiftly blows the fuse, igniting an arc. This arc activates the arc tube, causing a decomposition of substantial gas volumes, which create high pressure inside the tube and generate a vertical wind path. This ingenious mechanism rapidly stretches and elongates the arc. After the fuse has blown, the moving contact gracefully releases tension and rotates outward, while the locking mechanism disengages, allowing the fuse tube to drop and achieve a break position. When it’s necessary to pull the load, an insulating rod is adeptly used to pull the moving contact, maintaining contact with the static contact. With continued effort, the auxiliary contacts separate, generating an arc between them that is stretched within the hood slit. The arc cover, containing gas, acts to extinguish the arc as the current approaches zero.
Use and Standards
This exemplary product is meticulously designed for deployment in 10 to 35KV distribution lines, including branching lines and on the primary side of distribution transformers. It provides robust protection against overloads and short circuits while enabling efficient separation and combination of the rated load current.
The meticulous design of this product adheres to the JB/T8321-1996 Method for AC high-voltage fuse preparation, while the product parameters are aligned with GB15166.3-1994 high voltage fuses Expulsion fuses standards. Where the standards lack detailed definitions of critical parameters and configurations, adjustments are made in accordance with 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 are premier solutions for outdoor high-voltage protection. Designed to connect with the incoming feeder of distribution transformers or lines, they play a vital role in safeguarding transformers and lines from short circuit incidents and overload conditions while managing the on/off load current. The drop-out fuse cutout comprises insulating insulator supports and a fuse tube, with static contacts securely affixed on both sides of the insulator support and moving contacts installed at the ends of the fuse tube. The fuse tube features an internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also includes reinforced elastic auxiliary contacts and an arc-extinguishing enclosure for efficient on-off load current switching.
In standard operational scenarios, the fuse link ensures the fuse tube is firmly tightened to maintain a closed position. When faults occur, the fault current causes the fuse to melt immediately, resulting in an electric arc. This initiates the arc-extinguishing tube to heat up and release a substantial volume of gas, which creates high pressure and elongates the arc throughout the tube. Following the fuse link's melting, the moving contact loses its tension, allowing the mechanism to lock and the fuse tube to drop out, transitioning to an open position. For load switching during cutout, operators must skillfully use an insulating operating bar to pull the moving contact. Initially, the main contact maintains engagement with the auxiliary static contact. As the auxiliary contact is further pulled, an electric arc forms between the auxiliary contacts, elongating within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to extinguish the arc as the current passes through 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 innovation and excellence within the realm of electrical integration. As a progressive high-tech enterprise, we pride ourselves on an expert team of R&D, production, and service professionals, each enriched by over 15 years of dedicated industry expertise. Our commitment to technological advancement is unwavering, positioning us at the forefront of the industry.
Our expansive range of cutting-edge products includes high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and resilient substations. These high-performance offerings are essential across numerous critical sectors such as energy, chemical industries, metal smelting, expansive electric power grids, and industrial manufacturing. Our innovations extend their reach to esteemed universities, research institutions, and sectors like medical and pharmaceuticals, municipal commerce, water conservancy, hydropower projects, road traffic systems, and commercial and residential developments, forging a path of unparalleled excellence and reliability.
Firmly rooted in a commitment to technological innovation and the philosophy of 'smart manufacturing,' we focus on attracting elite technical talent to holistically enhance our core competitive edge. Our resolve is deeply ingrained in delivering unmatched value to our clients while aspiring to carve out the most prestigious brand in the industry. From our inception, we have charted an unwavering course from inception to excellence. Our journey is marked by a relentless pursuit of innovation and a modern business ethos, with quality as our lifeline, market orientation, reputation-driven growth, and management-driven efficiency as our guiding principles. We steadfastly adhere to the credo of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction,' which serves as our guiding light in quality and technical talent management, propelling our market presence. Our mission is to enhance China's electric power and grid transmission and distribution fields with increasing speed, strength, and ambition. Integrity is non-negotiable at our core, quality is held sacred, service is paramount, and customer satisfaction is our eternal creed. Our unwavering pursuit of excellence, relentless innovation, and dedication to building a trustworthy brand remain our guiding doctrines. Your recognition fuels our progress, and we extend heartfelt gratitude to all our loyal clients for their enduring support. Senhang Technology eagerly anticipates collaborating with you to forge a luminous 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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