Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage electrical protection solutions. Positioned strategically, these devices can be found on the high-voltage side of distribution transformers or serving as essential support links within distribution lines. They act as vital defenders against transformer and line short circuits, overload scenarios, and they efficiently facilitate the opening and co-loading of current. Ingeniously crafted, the drop-out fuse features an insulating bracket and fuse tubes, with static contacts firmly secured at both ends of the bracket and dynamic contacts at the ends of the fuse tube. The construction of the fuse tube is a marvel of engineering, boasting an inner arc tube coupled with an outer phenolic paper tube or epoxy glass cloth tube. Meanwhile, the Pull Load Drop-out Fuse offers enhanced adaptability with auxiliary contacts and an arc chute, specifically designed to streamline current load operations seamlessly.
During typical operations, the drop-out fuse is held securely in a closed position, with the fuse tube tensioned to perfection. In the event of a system malfunction, the fault current acts swiftly to blow the fuse, producing an arc. This arc ignites the arc tube, resulting in the decomposition of vast gas volumes that create high pressure inside the tube, generating a vertical wind path. This extraordinary mechanism effectively stretches and elongates the arc. Once the fuse has blown, the moving contact releases its tension, rotating outward, while the locking mechanism disengages, allowing the fuse tube to drop into a breaking position. For load pulling, an insulating rod is employed to pull the moving contact, ensuring contact with the static contact. As effort continues, the auxiliary contacts separate, creating an arc between them that stretches within the hood slit. The arc cover, containing gas, aids in extinguishing the arc as the current reaches zero.
Use and Standards
This exceptional product is meticulously designed for use in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It offers unparalleled protection against overloads and short circuits while skillfully enabling the efficient separation and combination of the rated load current.
Crafted with precision, this product adheres to the JB/T8321-1996 Method for AC high-voltage fuse preparation, with product parameters that conform to GB15166.3-1994 high voltage fuses Expulsion fuses standards. In areas where detailed definitions of critical parameters and configurations are absent, adjustments are made in adherence to 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 outdoor high-voltage protective devices. Specifically designed to connect with the incoming feeder of distribution transformers or lines, these devices play an instrumental role in safeguarding transformers and lines from short circuit incidents and overload conditions while efficiently managing the on/off load current. The drop-out fuse cutout is composed of insulating insulator supports and a fuse tube, featuring static contacts fixed on both sides of the insulator support and moving contacts at the ends of the fuse tube. The fuse tube, a marvel of design, includes an internal arc-extinguishing tube surrounded by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout further includes enforced elastic auxiliary contacts and an arc-extinguishing enclosure for superb on-off load current switching.
In normal operational scenarios, the fuse link ensures that the fuse tube is tightened, maintaining a secure closed position. When faults arise, the fault current causes immediate melting of the fuse, generating an electric arc. This arc prompts the arc-extinguishing tube to heat up, releasing a substantial volume of gas and creating high pressure that elongates the arc throughout the tube. After the fuse link melts, the moving contact loses tension, allowing the mechanism to unlock, and the fuse tube to drop into an open position. For load switching during cutout, operators use an insulating operating bar to pull 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 the auxiliary contacts, elongating within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism expels gas to 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 as a beacon of innovation and excellence in the world of electrical integration. As a forward-thinking high-tech enterprise, we take pride in our experienced R&D, production, and service team, fortified by over 15 years of unparalleled industry expertise.
Our diverse product range features high-voltage solid-state soft starters, advanced capacitor cabinets, sophisticated high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and robust substations. These high-caliber products serve as the backbone for a wide array of sectors, including the energy and chemical industries, metal smelting, expansive electric power grids, industrial manufacturing, and prestigious universities and research institutions. Furthermore, our solutions are pivotal in empowering the medical and pharmaceutical industries, invigorating municipal commerce, enhancing water conservancy and hydropower initiatives, optimizing road traffic systems, and enriching both commercial and residential developments.
Anchored by an unwavering commitment to technological innovation and the philosophy of "smart manufacturing," we are resolutely focused on attracting elite technical talent to comprehensively enhance our company's core competitive advantages. We are passionately committed to delivering unmatched value to our clients with the ambition to create the most respected brand within the industry. From our inception, we have persistently advanced from genesis to excellence. Our journey is guided by a modern business ethos, emphasizing quality as our lifeline, market-driven dynamics, reputation-fueled development, and efficiency through management. We remain unwavering in our dedication to "technology as our beacon, standardized management, superior quality, and customer satisfaction" as our core tenets in quality and talent management, diligently striving to amplify our market presence. Our mission is to serve China's electric power and grid transmission and distribution fields with escalating speed, strength, and ambition. At our very core, integrity is paramount, quality is inviolable, service is sovereign, and customer satisfaction is our everlasting creed. Our relentless pursuit of excellence, ceaseless innovation, and commitment to building a trustworthy brand are our guiding lights. Your support propels our progress. We express our profound gratitude to all our devoted clients for their unwavering support, and Senhang Technology eagerly looks forward to partnering with you to craft a brighter tomorrow.
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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