Product Description
General
The drop-out fuse and pull-load drop-out fuse are indispensable outdoor high-voltage protective devices. They are strategically installed on the high-voltage side of distribution transformers or distribution line supports to offer paramount protection against transformer and line short circuits, overloads, and facilitate seamless open and co-load current operations. Constructed from durable insulating brackets and fuse tubes, these fuses feature static contacts at each end of the insulation bracket, while moving contacts are affixed to both ends of the fuse tube. The robust fuse tube consists of an inner arc tube and an outer phenolic paper tube or epoxy glass cloth tube. Enhanced flexibility in auxiliary contacts and an arc chute in the pull-load drop-out fuse ensure exceptional performance in open and co-load current scenarios, redefining reliability.
During standard operation, the fuse tube, under fuse tension, maintains a closed position. Upon system failure, the fault current swiftly blows the fuse, creating an arc. The arc tube, ignited by the electric arc, decomposes substantial gas volumes, generating high pressure within the tube and creating a strong vertical wind along the pipeline, swiftly stretching and elongating the arc. Post-fuse blow, the moving contact loses tension and releases, triggering the locking mechanism to disengage the fuse tube, which then drops, achieving a breaking position. During load pulling, an insulating rod pulls the moving contact, initially maintaining contact with the static contact. As the insulating rod continues pulling, the auxiliary contacts separate, forming an arc between them. This arc elongates within the hood slit, where the arc cover, filled with gas, extinguishes the arc as the current reaches zero.
Use and Standards
This remarkable product is designed for use in 10 to 35KV distribution lines branching lines and the primary side of distribution transformers. It offers exceptional overload and short circuit protection, efficiently managing the separation and combination of the rated load current for ultimate reliability.
Our product is engineered to meet JB/T8321-1996 standards for AC high-voltage fuses. Furthermore, it adheres to GB15166.3-1994 standards for high voltage expulsion fuses. To address any undefined parameters and configurations, we adopt JB/DQ2139-198610 standards for 10 to 35KV outdoor high voltage drop fuses, ensuring our product stands out in quality and performance.
Drop-out fuse cutouts and load switching fuse cutouts are robust outdoor high voltage protective devices. Seamlessly integrated with the incoming feeder of distribution transformers or distribution lines, they primarily safeguard transformers and lines from short circuits, overloads, and enable smooth on/off loading operations. Comprising insulated insulator supports and fuse tubes, the static contacts are strategically affixed on both sides of the insulator support, while moving contacts are aligned at each end of the fuse tube. The fuse tube features an inside arc-extinguishing tube with an outer phenolic compound paper tube or epoxy glass tube. Load switching fuse cutouts offer reinforced elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring superior performance for on-off loading currents.
In standard operations, the fuse link tightly secures the fuse tube, forming a closed position. When a system fault occurs, the fault current promptly melts the fuse, producing an electric arc that heats the arc-extinguishing tube, releasing a significant amount of gas. This generates high pressure and propels the arc along the tube. Once the fuse link melts, the moving contact loses its tension, unlocking the mechanism, and causing the fuse tube to drop out, shifting the cutout to an open position. During load switching, the operator uses an insulating operating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged. As pulling continues, the auxiliary contact separates, generating an electric arc between them. This arc elongates within the arc-extinguishing enclosure gap, where the arc-extinguishing mechanism releases gas to extinguish the arc as the current passes zero, ensuring a secure and reliable 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. is a pioneering high-tech enterprise dedicated to the realm of electrical integration. With an expert team in R&D, production, and service boasting over 15 years of rich industry experience, we stand at the forefront of innovation.
Our core product offerings include cutting-edge high-voltage solid-state soft starters, state-of-the-art capacitor cabinets, versatile high and low voltage switchgear, advanced gas-insulated switchgear, and robust substations. These solutions are extensively adopted across a broad spectrum of industries, namely energy and chemical sectors, metal smelting operations, power grids, industrial manufacturing, academic institutions, medical and pharmaceutical fields, municipal commerce, water conservancy and hydropower projects, road transportation systems, and commercial and residential domains.
We are steadfast in our commitment to technological innovation and embody the "smart manufacturing" philosophy by actively recruiting top-tier technical talent. This strategic approach significantly bolsters our core competitiveness, allowing us to deliver unparalleled value to our customers while aspiring to become the industry's premier brand. Since our inception, we have progressed remarkably, transforming from modest beginnings to exceptional achievements. Our journey is defined by relentless innovation and adherence to a modern business strategy where quality ensures survival, market focus drives development, reputation fosters growth, and efficient management enhances performance. We uphold the tenets of 'technology as our guide, standardized management, superior quality, and customer satisfaction' in our quest to elevate market competitiveness. With a firm resolve, we aim to serve China's electric power and grid sectors with unmatched speed, strength, and ambition. Integrity is our foundation, quality is our priority, service is our hallmark, and customer satisfaction is our perpetual goal. Our pursuit of excellence and continuous innovation is unwavering, as we strive to build a brand synonymous with trust. Your recognition fuels our passion, and we extend our heartfelt gratitude to our esteemed clients for their unwavering support and affection. 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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