Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are premier solutions for outdoor high-voltage electrical protection. Expertly engineered for strategic placement on distribution transformers' high-voltage side or as pivotal support elements in distribution lines, these devices excel in shielding against transformer and line short circuits, overload circumstances, and permit seamless current opening and co-loading. Crafted with precision, the drop-out fuse boasts an insulating bracket and fuse tubes, featuring static contacts at bracket ends and dynamic contacts on the fuse tube ends. Its construction includes an internal arc tube with an exterior phenolic paper or epoxy glass cloth tube. The Pull Load Drop-out Fuse is enhanced with auxiliary contacts and an arc chute, tailored for smooth current load management.
In typical operations, the drop-out fuse remains securely closed with its fuse tube tensioned. When a malfunction arises, the fault current promptly melts the fuse, sparking an arc. This ignites the arc tube, decomposing vast gas volumes, building high pressure inside the tube, and forming a vertical wind path that elongates the arc swiftly. Post-blow, the moving contact releases, rotates outward, and the locking mechanism disengages, allowing the fuse tube to drop and break the circuit. For load pulling, an insulating rod extracts the moving contact while maintaining static contact. Continued effort separates the auxiliary contacts, creating a stretched arc within the hood slit. The arc cover, containing gas, extinguishes the arc as the current reaches zero.
Use and Standards
This exceptional product is purpose-built for deployment in 10 to 35KV distribution lines, including branch lines and on distribution transformers' primary side. It provides formidable protection against overloads and short circuits while facilitating efficient load current separation and combination.
Meticulously crafted, this product aligns with the JB/T8321-1996 Method for AC high-voltage fuse preparation, adhering to the GB15166.3-1994 high voltage fuses Expulsion fuses standards. In instances where standards lack detailed definitions, adjustments are made according to 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 top-tier outdoor high-voltage protective devices. Designed to connect with incoming feeder lines of distribution transformers or lines, they safeguard against short circuit events and overloads while adeptly managing on/off load current. The drop-out fuse cutout consists of insulating supports and a fuse tube, with static contacts on support sides and moving contacts at the tube ends. The fuse tube includes an internal arc-extinguishing tube and an external phenolic compound paper or epoxy glass tube. The load switching fuse cutout features reinforced elastic auxiliary contacts and an arc-extinguishing enclosure for effective on-off load current switching.
In standard operations, the fuse link ensures a closed position with the fuse tube tensioned. Upon faults, the fault current immediately melts the fuse, creating an arc. This heats the arc-extinguishing tube, releasing a large gas volume, building high pressure and elongating the arc. After the fuse link melts, tension in the moving contact is lost, the mechanism locks, and the fuse tube drops, opening the circuit. For load switching, operators use an insulating bar to pull the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As pulled further, an arc forms between auxiliary contacts, elongating in the arc-extinguishing enclosure gap. The mechanism expels gas to extinguish the arc as current reaches 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 within the competitive world of electrical integration. Proudly positioned as a high-tech enterprise, we possess a highly experienced R&D, production, and service team, enriched by a profound legacy of over 15 years in the industry.
Our diverse product spectrum boasts cutting-edge high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and resilient substations. These high-performance solutions are indispensable across various sectors, including the energy and chemical industries, metal smelting, expansive electric power grids, and industrial manufacturing. Additionally, they play a pivotal role in esteemed universities and research institutions. Our innovations further empower the medical and pharmaceutical sectors, strengthen municipal commerce, enhance water conservancy and hydropower projects, optimize road traffic systems, and enrich both commercial and residential developments.
Firmly anchored in our unwavering commitment to technological advancement and the principles of 'smart manufacturing,' we are devoted to attracting elite technical talent to continuously elevate our core competitive strengths. Our mission is to craft unparalleled value for our clients while aspiring to establish the most respected brand in the industry. Since our foundation, we have relentlessly pursued excellence, progressing from inception to distinction. Our journey is defined by a dedication to innovation, underscored by a modern business philosophy that prioritizes quality as our cornerstone, market alignment, reputation-led development, and management-driven efficiency. We hold steadfastly to our guiding principles: 'technology as the guide, standardized management, exceptional quality, and customer satisfaction,' ensuring our market presence is ever-strengthening. Our mission is to serve China's electric power and grid transmission and distribution sectors with escalating speed, strength, and ambition. At our core, integrity is non-negotiable, quality remains sacrosanct, service is paramount, and customer satisfaction is our enduring creed. Our pursuit of excellence, relentless innovation, and commitment to building a trusted brand are our guiding lights. Your recognition propels us forward. We express our deepest gratitude to all our loyal clients for their unwavering support, and Senhang Technology looks forward to a future of collaborative success with you, forging a brighter tomorrow 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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