Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse stand as paramount solutions for superior outdoor high-voltage electrical protection. These advanced devices are expertly positioned either on the high-voltage side of distribution transformers or as pivotal support links within distribution lines. They act as indispensable shields against transformer and line short circuits, overload conditions, and skillfully manage the opening and co-loading of current. The drop-out fuse is masterfully engineered with an insulating bracket and fuse tubes, where static contacts are securely fastened at both ends of the bracket, and moving contacts are adeptly attached to the ends of the fuse tube. The intricate construction of the fuse tube features an inner arc tube elegantly paired with an outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse is designed with enhanced versatility, featuring auxiliary contacts and an arc chute, specifically crafted for seamless current load operations with superior efficiency.
During typical operations, the drop-out fuse remains steadfastly held in a closed position, with the fuse tube expertly tensioned. Upon encountering a system malfunction, the fault current swiftly melts the fuse, sparking an arc. This arc ignites the arc tube, instigating the decomposition of large gas volumes, thereby generating high pressure inside the tube and forming a vertical wind path. This ingenious mechanism rapidly elongates and extinguishes the arc. Post-fuse melting, the moving contact releases its tension and elegantly rotates outwards, as the locking mechanism disengages, allowing the fuse tube to drop and reach a breaking position. When it becomes essential to pull the load, an insulating rod is employed to draw the moving contact, ensuring sustained contact with the static contact. As the effort continues, the auxiliary contacts part, forming an arc between them that is elongated within the hood slit. The arc cover, charged with gas, masterfully aids in arc extinguishment as the current reaches zero, ensuring a smooth and safe operation.
Use and Standards
This prestigious product is meticulously crafted for deployment in 10 to 35KV distribution lines, encompassing branching lines and on the primary side of distribution transformers. It provides formidable protection against overloads and short circuits while empowering the efficient separation and combination of the rated load current, ensuring unwavering reliability and performance.
The meticulous design of this product adheres to the rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation, while its exemplary parameters align with GB15166.3-1994 high voltage fuses Expulsion fuses standards. Where standards lack detailed definitions of essential parameters and configurations, adjustments are made in accordance with the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses, ensuring uncompromised quality and adherence to industry benchmarks.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are distinguished as premier outdoor high-voltage protective devices. Engineered to integrate seamlessly with the incoming feeder of distribution transformers or lines, they fulfill a crucial role in shielding transformers and lines from short circuit incidents and overload conditions while expertly managing the on/off load current. The drop-out fuse cutout is comprised of insulating insulator supports and a fuse tube, with static contacts firmly fixed on both sides of the insulator support and moving contacts precisely installed at the ends of the fuse tube. The fuse tube is equipped with an internal arc-extinguishing tube, paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is complemented by reinforced elastic auxiliary contacts and an arc-extinguishing enclosure for proficient on-off load current switching, ensuring optimal performance and safety.
In standard operational scenarios, the fuse link ensures the fuse tube is expertly tightened to maintain a steadfast closed position. When faults arise, the fault current causes the fuse to melt instantaneously, generating an electric arc. This prompts the arc-extinguishing tube to heat and discharge significant gas volumes, creating high pressure and elongating the arc throughout the tube. Following the melting of the fuse link, the moving contact loses its tension, allowing the mechanism to unlock and the fuse tube to drop, transitioning to an open position. For load switching during cutout, operators utilize 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 further pulled, 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, ensuring a seamless and efficient operation.
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 unmatched excellence within the sphere of electrical integration. As a vibrant high-tech enterprise, we proudly present an expert team dedicated to research and development, production, and service, enriched by a wealth of over 15 years of specialized industry expertise, ensuring our leadership in the field.
Our remarkable product suite encompasses advanced high-voltage solid-state soft starters, innovative capacitor cabinets, versatile high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and resilient substations. These high-caliber products are pivotal across diverse sectors, ranging from the energy and chemical industries, metal smelting, and extensive electric power grids, to industrial manufacturing and prestigious universities as well as research institutions. Furthermore, our tailored solutions enhance the medical and pharmaceutical fields, strengthen municipal commerce, support water conservancy and hydropower initiatives, and optimize road traffic systems while enriching both commercial and residential developments.
Firmly anchored in our unwavering commitment to technological advancement and the ideal of “smart manufacturing,” we are on a mission to attract premier technical talent, thereby bolstering our company’s core competitive advantage. Our resolute aim is to deliver exceptional value to our clients and craft the most revered brand in the industry. From our early days, we have advanced tirelessly, transitioning from inception to excellence. Our journey is characterized by an unwavering commitment to innovation and supported by a contemporary business ethos that underscores quality as our foundation, market responsiveness, reputation-led growth, and management-driven efficacy. We remain steadfast in our adherence to “technology as the guide, standardized management, exceptional quality, and customer satisfaction” as the bedrock of our quality and technical talent management strategy, diligently striving to expand our market impact. Our mission is to empower China’s electric power and grid transmission and distribution sectors with unprecedented speed, strength, and ambition. At our core, integrity is paramount, quality is sacred, service is supreme, and customer satisfaction is our perpetual promise. Our relentless drive for excellence, continuous innovation, and commitment to establishing a trustworthy brand are our guiding forces. Your recognition is the catalyst for our progress. We extend our deepest gratitude to all our cherished clients for their steadfast support, and Senhang Technology eagerly looks forward to partnering with you to create 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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