Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage protection, offering unparalleled reliability for electrical systems. Meticulously engineered, these devices are strategically placed on the high-voltage side of distribution transformers or serve as pivotal connection points within distribution lines. They are indispensable for shielding against transformer and line short circuits, as well as overload conditions, while streamlining the opening and co-loading of current. Crafted with precision, the drop-out fuse consists of an insulating bracket and robust fuse tubes, complemented by static contacts at both ends of the bracket and dynamic moving contacts at the ends of the fuse tube. The fuse tube's architecture includes an inner arc tube and an exterior phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse is further enhanced with additional flexibility, featuring auxiliary contacts and an arc chute, which are expertly designed for seamless current load operations and superior performance.
During typical operations, the drop-out fuse is meticulously held in a secure, closed position with the fuse tube under tension. In the event of a system anomaly, the fault current acts swiftly to blow the fuse, creating an arc. This arc activation ignites the arc tube, leading to the decomposition of significant gas volumes, which in turn creates high pressure within the tube and generates a powerful vertical wind path. This extraordinary mechanism rapidly stretches and prolongs the arc, ensuring swift and effective fault management. Once the fuse has blown, the moving contact loses tension and rotates outwards, as the locking mechanism disengages, allowing the fuse tube to drop and achieve a precise breaking position. When load pulling becomes necessary, an insulating rod is utilized to pull the moving contact while maintaining contact with the static contact. With continued exertion, the auxiliary contacts separate, and an arc forms between them, which is stretched within the hood slit. The arc cover, infused with gas, facilitates efficient arc extinguishment as the current approaches zero, ensuring safe and reliable operation.
Use and Standards
This exceptional product is explicitly designed for application in 10 to 35KV distribution lines, encompassing branching lines and the primary side of distribution transformers. It provides formidable protection against overloads and short circuits, while enabling the seamless separation and integration of the rated load current, ensuring the highest level of operational efficiency and reliability.
The meticulous craftsmanship of this product complies with the JB/T8321-1996 Method for AC high-voltage fuse preparation, aligning perfectly with the product parameters set by GB15166.3-1994 high voltage fuses Expulsion fuses standards. In instances where the standards do not provide comprehensive definitions of critical parameters and configurations, modifications are made in accordance with the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses, ensuring the product meets and exceeds industry expectations for performance and safety.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout stand as premier exemplars of outdoor high-voltage protective devices. Expertly designed to interface with the incoming feeder of distribution transformers or lines, they play an integral role in protecting transformers and lines from short circuits and overloads, while adeptly managing the on/off load current. The drop-out fuse cutout comprises insulating insulator supports and a robust fuse tube, with static contacts affixed on both sides of the insulator support and dynamic moving contacts installed at the ends of the fuse tube. The fuse tube features an internal arc-extinguishing mechanism, along with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is further enhanced with enforced flexible auxiliary contacts and an arc-extinguishing enclosure, ensuring efficient and reliable on-off load current management.
In standard operational contexts, the fuse link is instrumental in ensuring the fuse tube is tightened, maintaining the closed position. Upon encountering faults, the fault current causes the fuse to melt instantaneously, generating an electric arc. This results in the arc-extinguishing tube heating up and releasing substantial volumes of gas, creating high pressure that elongates the arc throughout the tube. Once the fuse link melts, 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 remains engaged with the auxiliary static contact. As the auxiliary contact is progressively pulled, an electric arc forms between the auxiliary contacts and elongates within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to efficiently extinguish the arc as the current passes through zero, ensuring a seamless and secure operation.
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 unmatched excellence in the sphere of electrical integration. We are a vibrant high-tech enterprise, anchored by an experienced R&D, production, and service team, enriched with over 15 years of dedicated industry expertise. Our legacy is built on a foundation of innovation and commitment to excellence.
Our diverse and extensive product lineup includes state-of-the-art high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and durable substations. These dynamic, high-performance solutions play a pivotal role across a multitude of sectors, including the energy and chemical industries, metal smelting, expansive electric power grids, industrial manufacturing, and esteemed universities and research institutions. Additionally, our innovative solutions empower the medical and pharmaceutical sectors, enhance municipal commerce, elevate water conservancy and hydropower projects, optimize road traffic systems, and enrich the living experience in commercial and residential developments.
Firmly rooted in a steadfast commitment to technological innovation and the philosophy of "smart manufacturing," we are relentless in our pursuit of attracting top-tier technical talent, aiming to holistically elevate our company's core competitive edge. Our unwavering dedication to delivering exceptional value to our clients fuels our aspiration to forge the most esteemed brand in the industry. Since our inception, we have embarked on an unwavering journey from inception to excellence, guided by a commitment to innovation and bolstered by a modern business ethos. This ethos emphasizes quality as our lifeline, market orientation, reputation-driven development, and management-driven efficiency. We steadfastly uphold our commitment to "technology as the guide, standardized management, exceptional quality, and customer satisfaction" as our guiding tenets in quality and technical talent management, diligently enhancing our market presence. Our mission is to serve China's electric power and grid transmission and distribution fields with unparalleled speed, strength, and ambition. At our core, integrity is non-negotiable, quality is sacrosanct, service reigns supreme, and customer satisfaction is our eternal creed. Our unwavering pursuit of excellence, relentless innovation, and dedication to building a trustworthy brand remain our guiding principles. Your recognition fuels our progress. We extend our heartfelt gratitude to all our loyal clients for their enduring support, and at Senhang Technology, we eagerly anticipate collaborating with you to forge a brighter 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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