Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage electrical safeguarding. These devices, crafted with unrivaled precision, are strategically positioned on the high-voltage side of distribution transformers or as essential support links within distribution lines. They function as critical sentinels, adept at shielding against transformer and line short circuits and overload conditions, while also enabling smooth operations of opening and loading current. Ingeniously crafted, the drop-out fuse comprises an insulating bracket and fuse tubes, with static contacts securely fixed at each end and moving contacts seamlessly attached to the ends of the fuse tube. The fuse tube construction features an advanced inner arc tube combined with a resilient outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse distinguishes itself with exceptional flexibility, incorporating auxiliary contacts and an arc chute meticulously designed for flawless current load operations.
During standard operations, the drop-out fuse is steadfastly locked in a closed stance, with the fuse tube expertly tensioned. Upon fault detection, the fault current acts promptly, blowing the fuse and forming an arc. This aggressive arc ignites the arc tube, breaking down substantial gas volumes and creating immense pressure within the tube to forge a vertical wind path that skillfully extends the arc. As the fuse activates, the moving contact liberates, rotating elegantly outwards while the locking mechanism disengages, allowing the fuse tube to descend, reaching a decisive breaking point. For load pulling, an insulating rod delicately extracts the moving contact, maintaining contact with the static contact. As force is applied, auxiliary contacts part, producing an arc between them that expands within the hood slit. The arc cover deftly contains the gas, ensuring efficient arc extinguishment as the current neutralizes.
Applications and Compliance Standards
Our distinguished product is meticulously crafted for deployment in 10 to 35KV distribution lines, including branch lines and the primary side of distribution transformers. It delivers unwavering protection against overloads and short circuits, while effectively facilitating the separation and combination of rated load current.
This precision-engineered product adheres to the uncompromising JB/T8321-1996 Method for AC high-voltage fuse preparation. Its specifications are in harmony with the prestigious GB15166.3-1994 standards for high-voltage fuses, expulsion fuses. In scenarios where detailed definitions are absent, modifications are executed in alignment 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 the epitome of premier outdoor high-voltage protective devices. Intentionally designed to integrate with the incoming feeder of distribution transformers or lines, these devices play an indispensable role in shielding transformers and lines from short circuit events and overload conditions, while expertly managing the current on-off load. The drop-out fuse cutout consists of robust insulating supports and a fuse tube, with static contacts securely fixed on both ends and moving contacts precisely affixed at the tube's ends. The fuse tube showcases an advanced internal arc-extinguishing tube, paired with an outer phenolic compound paper tube or epoxy glass tube. Additionally, the load switching fuse cutout encompasses enhanced, elastic auxiliary contacts and an arc-extinguishing enclosure for proficient on-off load current switching.
In typical operational settings, the fuse link ensures the fuse tube remains firmly closed. Upon encountering malfunctions, the fault current rapidly melts the fuse, creating an electric arc that heats the arc-extinguishing tube, releasing substantial gas volumes and generating high pressure to extend the arc within the tube. Following the melting, the moving contact loses tension, enabling the mechanism to unlock and the fuse tube to drop out, transitioning to an open position. For cutout load switching, operators employ an insulating operating bar to extract the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact is further extracted, an electric arc forms between them, elongating within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism ejects gas to efficiently 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. emerges as a shining light of transformative innovation and unmatched excellence in the realm of electrical integration. As an energetic high-tech powerhouse, we boast a profoundly skilled R&D, production, and service team, enriched by over 15 years of steadfast commitment and industry expertise.
Our extensive assortment of products includes high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and durable substations. These premium products are essential across diverse sectors, fueling the energy and chemical industries, enhancing metal smelting processes, fortifying expansive electrical power grids, and supporting industrial manufacturing along with esteemed universities and research institutions. Additionally, our solutions empower the medical and pharmaceutical sectors, bolster municipal commerce, improve water conservation and hydropower initiatives, optimize road traffic systems, and elevate commercial and residential projects.
Firmly rooted in our unwavering commitment to technological innovation and the ethos of 'smart manufacturing,' we are dedicated to attracting premier technical talent to robustly elevate our core competitive edge. Our resolute commitment is to deliver unparalleled value to our clients, aspiring to craft the industry's most respected brand. From our founding, we have made continuous advancements, evolving from inception to superiority. Our journey is marked by innovation and sustained by a modern business philosophy, where quality is our cornerstone, market orientation is crucial, reputation-driven growth is essential, and efficiency is achieved through strategic management. We adhere steadfastly to the guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and technical talent management, diligently expanding our market presence. Our mission is to serve China's electric power and grid transmission and distribution sectors with ever-increasing speed, strength, and ambition. At our core, integrity is sacrosanct, quality is inviolable, service is supreme, and customer satisfaction is our eternal commitment. Our relentless pursuit of excellence, unwavering innovation, and commitment to building a dependable brand remain our guiding tenets. Your recognition fuels our progress. We extend our deep gratitude to all our loyal clients for their steadfast support, and Senhang Technology eagerly looks forward to partnering with you to shape 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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