Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage electrical protection solutions. Strategically crafted for placement on the high-voltage side of distribution transformers or as pivotal components in distribution lines, these devices stand as sentinels against transformer and line short circuits, as well as overload conditions, while enabling seamless current handling. Ingeniously designed, the drop-out fuse comprises an insulating bracket paired with fuse tubes, featuring static contacts anchored at both bracket ends and dynamic contacts at the tube's ends. The fuse tube's sophisticated design includes an inner arc tube, complemented by an outer layer of either phenolic paper or epoxy glass cloth tube. Enhanced flexibility is a hallmark of the Pull Load Drop-out Fuse, complete with auxiliary contacts and an arc chute, ensuring smooth current load operations.
In everyday operations, the drop-out fuse remains tightly sealed, with its fuse tube held in tension. When a malfunction arises, the fault current acts swiftly to blow the fuse, forming an arc. The arc ignites the arc tube, leading to the decomposition of large gas volumes under high pressure, producing a vertical wind path that stretches and lengthens the arc effectively. Once the fuse blows, the moving contact releases tension and rotates outward, with the locking mechanism disengaging, allowing the fuse tube to descend and break the circuit. For load pulling, an insulating rod aids in pulling the moving contact, keeping contact with the static contact. With further effort, the auxiliary contacts separate, forming an arc between them. This arc, stretched within the hood slit, is extinguished as the arc cover's gas helps dissipate the energy when the current reaches zero.
Use and Standards
This exceptional product is meticulously designed for use in 10 to 35KV distribution lines, whether branching or on the primary side of distribution transformers. It delivers formidable protection against overloads and short circuits, ensuring the effective separation and combination of rated load currents.
The product's precision design aligns with the JB/T8321-1996 Method for AC high-voltage fuse preparation standards. Its parameters also meet the GB15166.3-1994 high voltage fuses Expulsion fuses standards. In cases where these standards do not fully define critical parameters and configurations, adjustments are made according to the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are unparalleled outdoor high-voltage protective devices. Engineered to connect with distribution transformers or line incoming feeders, they are vital in protecting transformers and lines from short circuits and overloads, managing on/off load currents with precision. The drop-out fuse cutout consists of insulating insulator supports and a fuse tube, with static contacts securely mounted on either side of the support, and moving contacts at the fuse tube ends. Internally, the fuse tube features an arc-extinguishing tube complemented by an outer phenolic compound paper or epoxy glass tube. The load switching fuse cutout also includes robust elastic auxiliary contacts and an arc-extinguishing enclosure for smooth on-off load current operations.
Under normal circumstances, the fuse link ensures that the fuse tube remains tightly secured in a closed position. When a fault occurs, the fault current promptly melts the fuse link, generating an arc. This heats the arc-extinguishing tube, releasing a substantial volume of gas to build high pressure, stretching the arc along the tube. After the fuse link melts, the tension is released, allowing the mechanism to unlock, and the fuse tube drops to open the circuit. For load switching, operators employ an insulating operating bar to maneuver the moving contact. Initially, the main contact stays engaged with the auxiliary static contact. Further pulling of the auxiliary contact generates an arc, which elongates within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism expels gas to quench the arc as the current dwindles to 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. represents the zenith of innovation and unparalleled excellence in the world of electrical integration. As a vibrant high-tech enterprise, we are proud of our seasoned R&D, production, and service team, enriched by over 15 years of dedicated industry expertise.
Our extensive product portfolio boasts high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These high-performance solutions are indispensable to a diverse array of sectors, including the energy and chemical industries, metal smelting, expansive electric power grids, industrial manufacturing, and esteemed universities and research institutions. Moreover, our solutions significantly empower the medical and pharmaceutical fields, bolster municipal commerce, enhance water conservancy and hydropower projects, optimize road traffic systems, and enrich commercial and residential developments.
Firmly anchored in a steadfast commitment to technological innovation and our philosophy of 'smart manufacturing,' we are dedicated to attracting top-tier technical talent to holistically elevate our company's core competitive edge. We are passionately devoted to delivering unparalleled value to our clients and aspire to forge the most esteemed brand within the industry. Since our inception, we have made relentless strides, progressing from inception to excellence. Our journey is paved with a commitment to innovation and sustained by a modern business ethos, emphasizing quality as our lifeline, market orientation, reputation-driven development, and management-driven efficiency. We unfailingly uphold our commitment to 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' as our guiding tenets in quality and technical talent management, diligently working to enhance our market presence. Our mission is to serve China's electric power and grid transmission and distribution fields with increasing speed, strength, and ambition. At our core, integrity is non-negotiable, quality is sacrosanct, service reigns supreme, and customer satisfaction is our eternal creed. Our unwavering pursuit of excellence, relentless innovation, and dedication to building a trustworthy brand remain our guiding principles. Your recognition fuels our progress. We extend our heartfelt gratitude to all our loyal clients for their enduring support, and Senhang Technology eagerly anticipates collaborating 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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