Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse stand as the epitome of outdoor high-voltage electrical protection solutions. Strategically engineered, these devices are positioned on the high-voltage side of distribution transformers or integrated within distribution lines as vital protective links. They act as indispensable barriers, shielding against transformer and line short circuits, overload scenarios, and facilitating concurrent current opening and loading operations. Ingeniously crafted, the drop-out fuse comprises an insulating bracket and fuse tubes, with static contacts firmly attached at both ends of the bracket, while moving contacts are precisely affixed to the ends of the fuse tube. Its robust construction features an inner arc tube paired with an outer phenolic paper or epoxy glass cloth tube. The Pull Load Drop-out Fuse is designed for optimal adaptability, featuring auxiliary contacts and an arc chute that ensure seamless current load operations.
During routine operations, the drop-out fuse remains securely locked in a closed position, with the fuse tube maintained under tension. In the event of a system fault, the fault current acts rapidly, blowing the fuse and producing an arc. This arc energizes the arc tube, resulting in the decomposition of considerable gas volumes which create high pressure within the tube, forging a vertical wind path. This ingenious mechanism swiftly stretches and elongates the arc. Post-blow, the moving contact relinquishes its tension, rotating outward, and the locking mechanism disengages, allowing the fuse tube to drop into a breaking position. When a load pull is required, an insulating rod is adeptly used to draw the moving contact, ensuring it remains in contact with the static contact. With persistence, the auxiliary contacts disengage, creating a dynamic arc between them, extended within the hood slit. The arc cover, equipped to manage gas, aids in extinguishing the arc as the current approaches zero.
Use and Standards
This exceptional product is meticulously crafted for application in 10 to 35KV distribution lines, including branching segments and the primary side of distribution transformers. It provides formidable protection against overloads and short circuits while enabling the effective separation and integration of the rated load current.
The precise engineering of this product adheres to the JB/T8321-1996 standards for AC high-voltage fuse preparation, with product parameters aligning with GB15166.3-1994 high voltage fuses Expulsion fuses standards. In instances where standards lack comprehensive definitions of key parameters and configurations, modifications are made in accordance with the JB/DQ2139-1986 interim technological requirements for 10 to 35KV outdoor high voltage drop fuses.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are premier within outdoor high-voltage protective device categories. Thoughtfully designed for seamless connection with the incoming feeder of distribution transformers or lines, they serve a pivotal role in shielding transformers and lines from short circuit events and overload states while expertly handling the on/off load current. The drop-out fuse cutout consists of insulating insulator supports and a fuse tube, with static contacts securely fastened on both sides of the insulator support, and moving contacts strategically positioned at the ends of the fuse tube. The fuse tube boasts an internal arc-extinguishing tube alongside an outer phenolic compound paper or epoxy glass tube. The load switching fuse cutout is further enhanced with fortified elastic auxiliary contacts and an arc-extinguishing enclosure, optimizing on-off load current switching with remarkable efficiency.
In standard operational conditions, the fuse link ensures the fuse tube is firmly tightened to maintain a closed posture. When faults arise, the fault current swiftly melts the fuse, generating an electric arc. This triggers the arc-extinguishing tube to heat and release a copious amount of gas, creating elevated pressure and extending the arc throughout the tube. Following the fuse link's melting, the moving contact loses its tension, permitting the mechanism to lock and the fuse tube to drop, transitioning to an open position. For load switching during cutout, operators utilize an insulating operating bar to maneuver the moving contact. Initially, the main contact remains connected with the auxiliary static contact. As the auxiliary contact is further disengaged, an electric arc emerges between the auxiliary contacts, elongating within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism expels gas to effectively extinguish the arc as the current traverses 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 as a beacon of cutting-edge innovation and unparalleled excellence in the realm of electrical integration. As a vibrant high-tech enterprise, we proudly showcase a seasoned R&D, production, and service team, enriched with over 15 years of dedicated industry expertise, driving us to the forefront of the industry.
Dive into our expansive product portfolio, featuring high-voltage solid-state soft starters, sophisticated capacitor cabinets, and a wide array of high and low voltage switchgear. Our advanced gas-insulated switchgear and robust substations cater to a spectrum of industries, including energy, chemical, and metal smelting sectors. Our versatile solutions seamlessly integrate with vast electric power grids, industrial manufacturing processes, and are trusted by prestigious universities and leading research institutions. Further, we empower the medical and pharmaceutical industries, support municipal commerce, enhance water conservancy and hydropower endeavors, optimize road traffic systems, and elevate both commercial and residential developments. Our products and solutions stand as the backbone of modern infrastructure.
Firmly rooted in our unwavering commitment to technological innovation, coupled with the philosophy of 'smart manufacturing,' we are on a mission to attract top-tier technical talent, thereby elevating our company's core competitive edge. Our dedication to delivering unparalleled value to clients drives us to aspire to become the most esteemed brand in the industry. From our inception, we have embarked on a relentless journey from inception to excellence, guided by a commitment to innovation. Our modern business ethos emphasizes quality as our lifeline, market orientation, reputation-driven growth, and management-driven efficiency. We steadfastly adhere to our guiding tenets: 'Technology as the guide, standardized management, exceptional quality, and customer satisfaction,' which underpin our strategies in quality and technical talent management, as we work diligently to strengthen 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 the heart of our operations, 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 are our guiding principles. Your recognition is the catalyst for our progress. With heartfelt gratitude, we thank all our loyal clients for their unwavering support, and Senhang Technology eagerly anticipates partnering 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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