Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are indispensable elements of outdoor high-voltage electrical protection systems. Strategically positioned on the high-voltage side of distribution transformers or as a critical Support Link on distribution lines, they serve as formidable guardians against transformer and line short circuits, overloads, and current management tasks. Constructed with a robust insulating bracket and integral fuse tubes, both static and moving contacts are meticulously installed at pivotal points, forming a dynamic system of resilience. The fuse tube, comprised of an advanced inner arc tube and an outer shield made of phenolic paper or epoxy glass cloth, ensures superior performance. The Pull Load Drop-out Fuse stands as a testament to engineering excellence, providing enhanced flexibility with auxiliary contacts and an arc chute that elevates its capability to manage load currents seamlessly.
In normal operations, the drop-out fuse showcases its sophistication as the fuse tube, under tension, maintains a steadfast closed position. Upon system failure, the fault current swiftly activates the fuse, creating a powerful arc. The arc tube's meticulous design allows it to endure the arc's intensity, releasing copious gas and creating a robust high-pressure environment within the tube. This orchestrated event extends and elongates the arc rapidly. Post-fuse activation, the moving contact loses its tension, triggering the release of the fuse tube, which then naturally assumes a breaking position. When initiating a load pull, the insulating rod plays a crucial role by engaging the moving contact. At this juncture, a temporary union of the moving and static contacts persists. As the insulating rod continues its motion, the auxiliary contacts separate, sparking an arc within the hood's slit. The arc cover, now bustling with activity, suppresses the arc as the current wanes to zero, ensuring a safe and efficient operation.
Use and Standards
This innovative product finds its specialized application in 10 ~ 35KV distribution lines, specifically within branching lines and the primary side of distribution transformers. It is expertly crafted to offer robust overload and short circuit protection while adeptly managing the Separation and Integration of the rated load current.
The product model adheres to the JB/T8321-1996 Method for type AC high-voltage fuses. Its design parameters align with the GB15166.3-1994 high-voltage fuses Expulsion fuses standards. Although the standards may not explicitly define every parameter and configuration, the product is refined according to the JB/DQ2139-1986 10 ~ 35KV outdoor high voltage drop fuse interim technology requirements, ensuring cutting-edge innovation and reliability.
Positioned as a stalwart of high-voltage protection, the Drop-out Fuse Cutout and Load Switching Fuse Cutout are engineered for outdoor deployment. They are seamlessly integrated with incoming feeders of distribution transformers or lines, excelling in safeguarding against transformer or line short circuits and overloads while managing on/off loading current with precision. The drop-out fuse cutout's construction features insulating insulator supports and a robust fuse tube, with static contacts firmly anchored on both ends. The fuse tube itself is a marvel, incorporating an inside arc-extinguishing tube, encased in either an outer phenolic compound paper tube or an epoxy glass tube. The load switching fuse cutout further distinguishes itself with enforced elastic auxiliary contacts and an arc-extinguishing enclosure, setting new standards in switching on-off loading current capabilities.
During standard operation, the fuse link, when tightened, affirms the fuse tube's fixed closed position. Should system faults arise, the fault current prompts an immediate fuse melt, inciting an electric arc. This arc escalates the arc-extinguishing tube's temperature, releasing an explosion of gas. This phenomenon generates high pressure and propels the arc along the tube. Once the fuse link melts, the moving contact loses its tightened strength, unlocking the mechanism and allowing the fuse tube to drop, transitioning the cutout to an open position. During load cutout switching, operators utilize an insulating bar to maneuver the moving contact, initially maintaining contact with the auxiliary static contact. As the pull progresses, the auxiliary contacts part, triggering an arc that elongates within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing system releases gas to effectively extinguish the arc as the current approaches zero, guaranteeing a safe and controlled environment.
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. is a dynamic, high-tech enterprise specializing in the innovative field of electrical integration. Boasting a highly skilled R&D, production, and service team, we bring over 15 years of invaluable industry expertise to the table.
Our extensive range of cutting-edge products features high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgears, gas-insulated switchgears, and state-of-the-art substations. These groundbreaking products have found applications across diverse sectors like energy and chemical industries, metal smelting, power grids, industrial manufacturing, academia, healthcare, municipal commerce, water conservancy and hydropower, transportation networks, and both commercial and residential domains.
Firmly anchored in technological innovation and our forward-thinking 'smart manufacturing' ethos, we consistently attract top-tier technical talent to significantly boost our core competitiveness. Our mission is to deliver unparalleled value to our clients while aspiring to establish the leading brand in the industry. Since our inception, we've charted an impressive journey of growth—transforming from humble beginnings to achieving excellence. Innovation is our cornerstone, and we are guided by a modern business philosophy of quality-driven survival, market-oriented growth, reputation-fueled development, and management-based efficiency. Our unwavering commitment is guided by 'technology leadership, standardized management, supreme quality, and customer satisfaction.' This dedication to quality and technical expertise elevates our market competitiveness as we aim to serve China's electric power and grid sectors with unmatched speed, strength, and ambition. Integrity is our foundation, quality our promise, service our priority, and customer satisfaction our eternal vow. In our relentless pursuit of excellence and continuous innovation, we strive to build a brand synonymous with trust. Your recognition fuels our ambition. We extend heartfelt gratitude to all our new and loyal customers for their unwavering support and goodwill. Together with Senhang Technology, we eagerly anticipate forging a brighter future hand in hand.
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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