Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse signify the pinnacle of outdoor high-voltage electrical protection. Each meticulously engineered device is strategically installed on the high-voltage side of distribution transformers or as integral support links within distribution lines. They serve as essential guardians, protecting against transformer and line short circuits and overload scenarios while enabling seamless current management for opening and loading operations. With an innovative design, the drop-out fuse integrates an insulating bracket and fuse tubes, securely clamping static contacts at each end, while the moving contacts are elegantly attached to the ends of the fuse tube. The fuse tube features a cutting-edge inner arc tube, combined with a robust outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse stands out with its enhanced versatility, featuring auxiliary contacts and a meticulously crafted arc chute for smooth current load transitions.
During regular operations, the drop-out fuse is fastened securely in a closed position, with the fuse tube held under precise tension. Upon fault detection, the fault current acts swiftly, blowing the fuse and generating an arc. This vigorous arc ignites the arc tube, decomposing a significant volume of gas and creating high pressure within the tube to forge a vertical wind path that skillfully stretches and elongates the arc. As the fuse blows, the moving contact releases, elegantly rotating outwards while the locking mechanism disengages, allowing the fuse tube to drop and achieve a definitive breaking position. When load pulling is required, an insulating rod is employed to draw out the moving contact while maintaining connection with the static contact. With continuous force application, the auxiliary contacts separate, generating an arc that stretches within the hood slit. The arc cover adeptly contains the gas, facilitating efficient arc extinguishment as the current approaches zero.
Applications and Compliance Standards
This esteemed product is meticulously designed for deployment in 10 to 35KV distribution lines, encompassing 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, delivering unmatched reliability in high-voltage environments.
The precision-crafted design of this product meets the rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation. Its specifications align with the prestigious GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In the absence of detailed definitions, adjustments are tailored 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. Meticulously designed to connect with the incoming feeder of distribution transformers or lines, they play a vital role in protecting transformers and lines from short circuit incidents and overload conditions while adeptly managing the on/off load current. The drop-out fuse cutout comprises robust insulating supports and a fuse tube, with static contacts strategically fixed on both sides and moving contacts expertly affixed at the ends of the fuse tube. The fuse tube features a sophisticated internal arc-extinguishing tube, complemented by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also incorporates high-performance, elastic auxiliary contacts and an arc-extinguishing enclosure for efficient on-off load current switching.
In typical operational situations, the fuse link ensures the fuse tube remains tightly closed. Upon encountering faults, the fault current swiftly melts the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing substantial volumes of gas and creating high pressure to elongate the arc within the tube. Once melted, the moving contact loses tension, allowing the mechanism to lock, and the fuse tube to gracefully drop out, transitioning to an open position. For cutout load switching, operators deftly utilize 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 pulled further, an electric arc forms between them, extending within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to efficiently 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. emerges as a beacon of groundbreaking innovation and unparalleled excellence within the dynamic realm of electrical integration. Esteemed as a vibrant high-tech enterprise, we proudly present a highly experienced R&D, production, and service team that is empowered by an unwavering dedication and over 15 years of profound expertise in the industry. Our commitment to pioneering advancements stands as a testament to our enduring legacy of excellence.
Our expansive product range is a testament to our commitment to quality and innovation, featuring high-voltage solid-state soft starters, sophisticated capacitor cabinets, both high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and resilient substations. These high-caliber products are indispensable across numerous sectors, serving vital roles in the energy and chemical industries, metal smelting operations, vast electrical power grids, industrial manufacturing, and prestigious universities and research institutions. Furthermore, our cutting-edge solutions power the medical and pharmaceutical fields, bolster municipal commerce, enhance water conservation and hydropower projects, optimize road traffic systems, and elevate commercial and residential developments, reflecting our broad impact on society's infrastructure.
Anchored in a steadfast commitment to technological innovation and the philosophy of 'smart manufacturing,' we are resolute in attracting top-tier technical talent to comprehensively enhance our core competitive advantage. Our unwavering dedication is to deliver unmatched value to our clients, aspiring to create the industry's most revered brand. Since our inception, relentless progress has been our hallmark, evolving from inception to excellence. Our journey is paved with innovation and sustained by a modern business ethos, where quality is our lifeline, market orientation is key, reputation-driven growth is paramount, and efficiency is realized through strategic management. We steadfastly adhere to the guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and technical talent management, diligently working to expand our market presence. Our mission is to serve 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 inviolable, service is sovereign, and customer satisfaction is our perennial creed. Our relentless pursuit of excellence, constant innovation, and commitment to building a trustworthy brand remain our guiding principles. Your recognition propels our progress, and we extend our heartfelt gratitude to all our loyal clients for their enduring support. Senhang Technology eagerly anticipates partnering with you to shape a brighter future together, united in our passion for excellence.
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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