Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse stand as the pinnacle of outdoor high-voltage electrical protection solutions. Impeccably engineered, these devices are strategically positioned on the high-voltage side of distribution transformers or serve as vital links within distribution lines. They function as indispensable protectors against transformer and line short circuits, as well as overloads, ensuring seamless current management for opening and loading. With a design that radiates innovation, the drop-out fuse features an insulating bracket and fuse tubes, with static contacts securely fixed at each end, while movable contacts elegantly connect at the ends of the fuse tube. The fuse tube incorporates an advanced inner arc tube, paired with a durable outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse is notable for its superior versatility, featuring auxiliary contacts and a meticulously designed arc chute for smooth current load transitions.
In standard operation, the drop-out fuse is securely fastened in a closed position, maintaining precise tension within the fuse tube. Upon detection of system faults, the fault current acts swiftly, blowing the fuse and initiating an arc. This dynamic arc ignites the arc tube, decomposing a large volume of gas, creating high pressure to form a vertical wind path that skillfully stretches and elongates the arc. As the fuse blows, the moving contact releases gracefully, rotating outward while the locking mechanism disengages, allowing the fuse tube to drop to its breaking position. For load pulling, an insulating rod is used to draw out the moving contact while maintaining linkage with the static contact. With continuous application of force, auxiliary contacts separate, generating an arc that stretches within the hood slit. The arc cover efficiently contains the gas, facilitating rapid arc extinguishment as the current approaches zero.
Applications and Compliance Standards
This distinguished product is expertly designed for deployment in 10 to 35KV distribution lines, covering 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-engineered design of this product complies with the rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters adhere to the esteemed GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In cases where specific definitions are not present, 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 the epitomes of high-performance outdoor high-voltage protective devices. Meticulously crafted to connect with the incoming feeder of distribution transformers or lines, they play an essential role in shielding transformers and lines from short circuit events and overload conditions while adeptly managing the on/off load current. The drop-out fuse cutout consists of 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 scenarios, 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 further pulled, 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. stands tall as a luminary of revolutionary innovation and unmatched excellence in the ever-evolving electrical integration landscape. As an energetic high-tech enterprise, we take immense pride in our highly skilled R&D, production, and service team, enriched by over 15 years of steadfast dedication and industry expertise.
Our vast product lineup encompasses high-voltage solid-state soft starters, innovative capacitor cabinets, both high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These superior products are critical across a variety of sectors, empowering the energy and chemical industries, metal smelting operations, extensive electrical power grids, industrial manufacturing, and esteemed universities and research institutions. Additionally, our solutions invigorate the medical and pharmaceutical sectors, bolster municipal commerce, advance water conservation and hydropower projects, streamline road traffic systems, and elevate both commercial and residential developments.
Rooted in a steadfast commitment to technological advancement and the mantra of 'smart manufacturing,' we are determined to attract elite technical talent, significantly enhancing our core competitive advantage. Our steadfast mission is to deliver unparalleled value to our clients, aspiring to establish the industry's most esteemed brand. Since our inception, we have been on a relentless path of progress, evolving from our beginnings to a state of excellence. Our journey is marked by innovation and fueled by a contemporary business ethos, where quality is our lifeline, market orientation is pivotal, reputation-driven growth is essential, and efficiency is achieved through strategic management. We unwaveringly adhere to the guiding tenets of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and technical talent management, diligently striving to broaden our market reach. 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 imperative, quality is untouchable, service is paramount, and customer satisfaction is our eternal creed. Our tireless pursuit of excellence, constant innovation, and steadfast commitment to building a reliable brand are our guiding principles. Your recognition propels our progress. We extend our heartfelt appreciation to all our loyal clients for their enduring support, and Senhang Technology eagerly anticipates collaborating 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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