Product Description
General
The drop-out fuse and pull load drop-out fuse are vital outdoor high-voltage protection solutions. They are strategically installed on the high-voltage side of distribution transformers or serve as key support links along distribution lines, providing robust protection against short circuits, overloads, and enabling seamless load current operation. Crafted with precision, the drop-out fuse consists of a sturdy insulating bracket and robust fuse tubes. Static contacts are securely mounted at each end of the insulation bracket, while moving contacts are affixed to the ends of the fuse tube. This innovative fuse tube is a composite of an inner arc tube enveloped by an outer phenolic paper tube or epoxy glass cloth tube. The pull load drop-out fuse is enhanced with flexible auxiliary contacts and an arc chute to efficiently manage co-load current operations.
During normal operation, the drop-out fuse maintains a closed position with the fuse tube under tension. Upon system failure, the fault current swiftly blows the fuse, generating an arc. The arc ignites the arc tube, decomposing it into a significant volume of gas, which creates high pressure within the tube and a vertical wind effect along the pipeline. This process stretches and elongates the arc rapidly. Once the fuse is blown, the moving contact loses tension and disengages, unlocking the mechanism and releasing the fuse tube. The fuse tube drops, establishing a breaking position. For load pulling, an insulating rod is used to disengage the moving contact. Initially, the moving and static contacts remain in contact. Continued pulling with the insulating rod separates the auxiliary contacts, producing an arc that stretches within the hood slit. The arc cover contains gas, and when the current reaches zero, the arc is extinguished.
Use and Standards
This product is expertly designed for use in 10 ~ 35KV distribution lines, branching lines, and the primary side of distribution transformers. It offers exceptional overload and short circuit protection, seamlessly separating and combining the rated load current to ensure continuous power reliability.
The product adheres to the JB/T8321-1996 standards for AC high-voltage fuses. The parameters are meticulously crafted following the GB15166.3-1994 standards for high voltage expulsion fuses. While some standards lack clarity on crucial parameters and configurations, revisions are made in accordance with JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses, ensuring peak performance.
The drop-out fuse cutout and load switching fuse cutout are expertly engineered for outdoor use as high voltage protective devices. They connect seamlessly with the incoming feeder of distribution transformers or distribution lines, offering unparalleled protection against short circuits and overloads. Additionally, they enable efficient on/off loading and current management. Comprising insulate insulator supports and a durable fuse tube, static contacts are fixed on both sides of the insulator support, with moving contacts installed at each end of the fuse tube. The fuse tube features an inside arc-extinguishing tube, encased in an outer phenolic compound paper or epoxy glass tube. The load switching fuse cutout is equipped with enforced elastic auxiliary contacts and an arc-extinguishing enclosure, expertly managing on-off loading currents.
In normal working conditions, the fuse link ensures the fuse tube is fixed in a close position. When the system encounters a fault, the resulting fault current causes the fuse to melt instantly, producing an electric arc. This heats the arc-extinguishing tube, releasing a substantial amount of gas that generates high pressure and propels the arc along the tube. Once the fuse link melts, the moving contact loses tension, the mechanism locks, and the fuse tube drops out, transitioning the cutout to an open position. For switching off during cutout loading, an operator uses an insulating operating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged. As the auxiliary contact is pulled, an electric arc forms between the auxiliary contacts, stretching within the arc-extinguishing enclosure gap. Simultaneously, arc-extinguishing gases are expelled to extinguish the arc as the current passes 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. is a cutting-edge, high-tech enterprise that specializes in electrical integration solutions. With an elite team dedicated to research, development, production, and service, we boast over 15 years of rich industry experience, setting new benchmarks in innovation and reliability.
Our distinguished product portfolio encompasses high-voltage solid-state soft starters, capacitor cabinets, both high and low voltage switchgear, gas-insulated switchgear, and an array of substations. Our innovative products have found widespread applications in diverse sectors, including energy, chemical industries, metal smelting, electric power grids, industrial manufacturing, academic research institutions, healthcare, municipal commerce, water conservancy, hydropower, road traffic, as well as in commercial and residential developments.
We are steadfast in our commitment to technological innovation, guided by our 'smart manufacturing' philosophy. By actively embracing top-tier technical talent, we significantly boost our core competencies, delivering unparalleled service excellence to our esteemed clients while striving to establish an industry-leading brand. Since inception, we have charted a remarkable growth trajectory—transforming from a nascent enterprise to an industry paragon. Our guiding motto revolves around quality-driven survival, market-oriented growth, reputation-fueled development, and management-led efficiency. With steadfast dedication, we pursue 'technology as our guide', standardized management, and superior quality to achieve customer satisfaction, continually enhancing our market prowess. Our ultimate aim is to serve China's electric power and grid sectors with greater speed, strength, and ambition. Grounded in integrity, we prioritize quality and elevate service to supreme levels, ensuring customer satisfaction remains our eternal mission. Through relentless pursuit of excellence, continuous innovation, and unwavering commitment to building a trustworthy brand, we aspire to earn your recognition—our greatest motivation. We express profound gratitude to our loyal customers for their unwavering support and affection. With Senhang Technology, we eagerly anticipate forging a brighter future together, 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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