Product Description
General
The Drop-out Fuse and Load Drop-out Fuse serve as outdoor high-voltage protective measures for electrical systems. Strategically installed on the high-voltage side of distribution transformers or as a crucial link in distribution lines, these fuses provide essential short circuit and overload protection, managing both the interruption and continuation of load currents. Engineered with an insulating bracket and innovative fuse tubes, each component plays a pivotal role: the static contacts are securely placed at either end of the bracket, while the moving contacts are meticulously positioned at both ends of the fuse tube, a sophisticated assembly comprising an inner arc tube and a robust outer shell of phenolic paper or epoxy glass cloth. The Pull Load Drop-out Fuse is enhanced by flexible auxiliary contacts and an arc chute, elevating its capability to manage co-load currents with precision and reliability.
In standard operation, the Drop-out Fuse maintains a closed position through the tension exerted on the fuse tube. Upon encountering a system fault, the prompt response of the blown fuse initiates an arc, with the arc tube activating under the intense heat, resulting in the swift release of significant gas quantities. This creates a high-pressure environment within the tube, propelling a vertical wind effect along the arc channel. As the fuse blows, the moving contact is freed from tension, triggering the release of the locking mechanism. The fuse tube subsequently descends, finalizing the break position. During load operations, an insulating rod is employed to disengage the moving contact. Initially, the static and moving contacts remain connected. As the rod continues to pull, the auxiliary contacts disengage, producing an arc within the hood slit. This arc resides in a gas-rich environment, ensuring efficient extinguishing when the current reaches zero.
Use and Standards
Our product is expertly designed for utilization in 10 to 35KV distribution line branches and the primary side of distribution transformers. It excels in providing paramount protection against overloads and short circuits, facilitating seamless separation and combination of rated load currents, thereby ensuring the reliability and safety of power distribution systems.
The product model aligns with the JB/T8321-1996 Method of Type AC High-Voltage Fuses. Adhering to GB15166.3-1994 standards for high-voltage expulsion fuses, our product is crafted with precision. While standards may lack explicit definitions of certain parameters and configurations, we ensure compliance through rigorous adherence to the JB/DQ2139-1986 interim technical requirements for 10 to 35KV outdoor high voltage drop fuses, ensuring top-tier performance and safety.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are meticulously engineered for outdoor high-voltage protection, effectively safeguarding distribution transformers or lines from short circuits and overloads, while also facilitating load switching. Comprising insulator supports and a sophisticated fuse tube, the static contacts are strategically fixed on the insulator support, with moving contacts affixed to the fuse tube ends. The fuse tube integrates an arc-extinguishing component, with an exterior of phenolic compound paper or epoxy glass, ensuring durability. The Load Switching Fuse Cutout features reinforced elastic auxiliary contacts and an advanced arc-extinguishing enclosure, expertly managing on-off loading currents with enhanced reliability.
Under normal conditions, the fuse link maintains a secure connection, positioning the fuse tube in a closed state. Should a fault arise, the immediate melting of the fuse link generates an electric arc, causing the arc-extinguishing tube to heat and expel significant gas volumes. This creates high pressure that propels the arc along the tube. Once the fuse link melts, the moving contact loses its tension, allowing the mechanism to lock and the fuse tube to drop, indicating an open position. During load switching, operators use an insulating operating bar to maneuver the moving contact. Initially, the main and auxiliary static contacts remain engaged. As the auxiliary contact disengages, an electric arc forms, extending within the arc-extinguishing enclosure gap. The arc is efficiently extinguished as the enclosure releases gas when the current reaches zero, ensuring safe and effective 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 proudly as a beacon of innovation and expertise in the dynamic field of electrical integration. As a high-tech enterprise, we possess a remarkable professional team dedicated to R&D, production, and service, all underpinned by over 15 years of profound industry experience.
Our distinguished range of products encompasses high-voltage solid-state soft starters, thoughtfully engineered capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. The versatility and reliability of our offerings have made them indispensable across a multitude of sectors, including the energy and chemical industries, metal smelting, electric power grids, industrial manufacturing, academic and research institutions, medical and pharmaceutical fields, municipal commerce, water conservancy and hydropower, road traffic systems, and both commercial and residential spheres.
Embracing the spirit of technological innovation and the philosophy of 'smart manufacturing,' we are committed to advancing our company by integrating high-caliber technical talents, thereby enhancing our core competitiveness. Our goal is to deliver unparalleled services to our valued customers while establishing our brand as the industry's finest. Since our inception, we have consistently evolved, transforming from inception to industry excellence. Our strategic focus is on innovation, adhering to a modern business ethos that prioritizes quality-driven survival, reputation-fueled development, and efficiency-led management. We operate under the tenets of 'technology as the guide, standardized management, superior quality, and ultimate customer satisfaction,' which form the backbone of our quality and technical talent management strategies. By doing so, we bolster our market competitiveness and commit to serving China's electric power and grid transmission and distribution fields with unmatched ambition and precision. Our core values are defined by integrity, with quality as our hallmark, superior service as our creed, and perpetual customer satisfaction as our ultimate mission. We are dedicated to achieving excellence, fostering continuous innovation, and building a brand that garners trust and respect. Your recognition fuels our passion and drive. We extend our heartfelt gratitude to our cherished customers, both new and longstanding, for their unwavering support and loyalty. Senhang Technology eagerly anticipates joining hands with you to sculpt a brighter, more prosperous 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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