Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse embody the pinnacle of outdoor high-voltage electrical protection. Masterfully crafted, these devices serve as indispensable protectors on the high-voltage side of distribution transformers and within distribution lines, safeguarding against transformer and line short circuits and overload conditions while ensuring seamless current regulation for opening and loading. The design is a testament to innovation, featuring an insulating bracket and fuse tubes that securely anchor static contacts at each end, with moving contacts elegantly affixed to the fuse tube ends. The fuse tube is equipped with a cutting-edge inner arc tube and a resilient outer phenolic paper or epoxy glass cloth tube. The Pull Load Drop-out Fuse offers enhanced versatility with auxiliary contacts and a meticulously engineered arc chute for smooth transition of current loads.
In normal operations, the drop-out fuse remains firmly latched in a closed state, with the fuse tube under exact tension. Upon detecting system faults, the fault current swiftly blows the fuse, creating an arc that ignites the arc tube. This process generates a significant volume of gas, building high pressure within the tube to skillfully elongate and stretch the arc, creating a vertical wind path. Once the fuse blows, the moving contact releases, executing a graceful outward rotation as the locking mechanism disengages, allowing the fuse tube to drop to a distinct breaking position. For load pulling, an insulating rod is used to draw out the moving contact while maintaining a connection with the static contact. Continuous force application separates the auxiliary contacts, generating an arc that extends within the hood slit. The arc cover efficiently contains the gas, allowing for effective arc extinguishment as the current nears zero.
Applications and Compliance Standards
This exceptional product is masterfully designed for implementation in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It provides unwavering protection against overloads and short circuits, while ensuring effective separation and combination of the rated load current.
The precision-crafted design of this product complies with the rigorous JB/T8321-1996 standards for AC high-voltage fuse preparation. Its parameters align with the esteemed GB15166.3-1994 standards for high voltage expulsion fuses. In instances where detailed definitions are lacking, 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 represent the zenith of high-performance outdoor high-voltage protective devices. Ingeniously designed, they connect with the incoming feeder of distribution transformers or lines, playing a vital role in shielding transformers and lines from short circuit events and overload conditions, while adeptly managing on/off load current. The drop-out fuse cutout comprises resilient insulating supports and a fuse tube, with static contacts strategically fixed on either side and moving contacts skillfully attached at the ends. The fuse tube boasts a sophisticated internal arc-extinguishing tube, enhanced by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also includes high-performance, elastic auxiliary contacts, and an arc-extinguishing enclosure for efficient on-off load current transition.
In typical operation, the fuse link ensures the fuse tube is tightly secured in a closed position. When faults arise, the fault current rapidly dissolves the fuse, creating an electric arc that activates the arc-extinguishing tube, releasing substantial gas volumes and generating high pressure to elongate the arc within the tube. Once dissolved, the moving contact loses tension, allowing the mechanism to lock and the fuse tube to descend gracefully to an open position. For cutout load switching, operators skillfully employ an insulating operating bar to draw the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact is further drawn, an electric arc forms between them, extending within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism expels gas to efficiently extinguish the arc when 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 radiant beacon of groundbreaking innovation and unmatched excellence within the ever-evolving world of electrical integration. As a lively high-tech enterprise, we proudly highlight our highly experienced R&D, production, and service team, fortified by over 15 years of steadfast dedication and industry expertise. Our commitment is to lead the future with innovation and quality.
Our extensive array of products includes high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These premium products are essential across a multitude of sectors, from the energy and chemical industries to metal smelting operations and expansive electrical power grids. We proudly serve industrial manufacturing, prestigious universities, research institutions, and beyond. Additionally, our solutions empower the medical and pharmaceutical fields, support municipal commerce, enhance water conservation, fuel hydropower projects, refine road traffic systems, and elevate both commercial and residential developments. Our reach and impact resonate through diverse industries.
Firmly anchored in our unwavering commitment to technological innovation and the philosophy of 'smart manufacturing,' we are determined to attract top-tier technical talent to enhance our core competitive edge comprehensively. Our dedication is to deliver unparalleled value to our clients, aspiring to craft the industry's most respected brand. From our inception, we've made relentless progress, evolving from our beginnings to unparalleled excellence. Our journey is paved with innovation, sustained by a modern business ethos, where quality is our lifeline, market orientation is key, reputation-driven growth is paramount, and efficiency is achieved through strategic management. We strictly adhere to the guiding principles of 'technology as the compass, standardized management, premium quality, and ultimate customer satisfaction' in our quality and technical talent management. We diligently work to expand our market presence, serving China's electric power, and grid transmission and distribution sectors with increasing speed, strength, and ambition. At our core, integrity is non-negotiable, quality is sacred, service is king, and customer satisfaction is our enduring creed. Our relentless pursuit of excellence, constant innovation, and commitment to cultivating 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 Senhang Technology eagerly anticipates partnering with you to craft 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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