Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are the epitome of outdoor high-voltage electrical protection excellence. Expertly designed, these devices are strategically deployed either on the high-voltage flank of distribution transformers or as vital links in distribution lines. They are indispensable guardians against transformer and line short circuits, overloads, and assist in the opening and co-loading of current. Ingeniously engineered, the drop-out fuse features an insulating bracket and meticulously crafted fuse tubes with static contacts precisely affixed at both bracket ends, while moving contacts secure the ends of the fuse tube. The fuse tube construction is both robust and reliable, comprising an inner arc tube paired with a durable outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse offers enhanced operational flexibility with auxiliary contacts and an arc chute, specifically tailored for seamless current load handling.
During typical operations, the drop-out fuse remains firmly secured in a closed position, ensuring the fuse tube is consistently tensioned. Upon any system anomaly, the fault current instantly causes the fuse to blow, producing an arc that activates the arc tube. This rapid reaction leads to the decomposition of substantial gas volumes, instigating high pressure within the tube and creating an impressive vertical wind pathway that swiftly elongates the arc. Once the fuse has blown, the moving contact releases its grip and rotates outward, while the locking mechanism disengages, permitting the fuse tube to drop into a definitive breaking position. In load-pulling scenarios, an insulating rod is utilized to strategically pull the moving contact, maintaining engagement with the static contact. With continued exertion, the auxiliary contacts part ways creating an arc between them, which is extended within the hood slit. The arc cover, ingeniously filled with gas, aids in extinguishing the arc as the current reaches zero, epitomizing safety and efficiency.
Use and Standards
This exceptional product is crafted for optimal performance in 10 to 35KV distribution lines, encompassing branching lines and the primary side of distribution transformers. It delivers steadfast protection against overloads and short circuits, while allowing for the seamless separation and combination of the rated load current, ensuring operational efficacy and reliability.
Every aspect of this product's meticulous design aligns with the JB/T8321-1996 Method for AC high-voltage fuse preparation. Its product parameters adhere to the esteemed GB15166.3-1994 high voltage fuses Expulsion fuses standards. In areas where the standards provide limited definitions for essential parameters and configurations, modifications are made following the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses, ensuring superior performance and compliance.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout stand as premier outdoor high-voltage protective devices. Purpose-built to connect with the incoming feeder of distribution transformers or lines, they are a pivotal defense against transformer and line short circuits, overload conditions, and proficiently manage on/off load current. The drop-out fuse cutout incorporates insulating insulator supports and a sturdy fuse tube, with static contacts diligently fixed on both sides of the insulator support, while moving contacts are strategically mounted at the ends of the fuse tube. Its state-of-the-art fuse tube boasts an internal arc-extinguishing tube and a resilient outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is further enhanced with fortified elastic auxiliary contacts and an arc-extinguishing enclosure, expertly designed for efficient on-off load current switching.
In regular operational instances, the fuse link is expertly designed to ensure the fuse tube is meticulously tightened, sustaining a closed position. When faults arise, the fault current rapidly melts the fuse, creating a powerful electric arc. This initiates the arc-extinguishing tube to heat and release an impressive volume of gas, generating high pressure that extends the arc throughout the tube. Following the melting of the fuse link, the moving contact loses tension, unlocking the mechanism and allowing the fuse tube to drop out, transitioning smoothly to an open position. For load switching during cutout, operators utilize an insulating operating bar to tactfully pull the moving contact. Initially, the main contact remains interconnected with the auxiliary static contact. As further pulling occurs, an electric arc develops between the auxiliary contacts, which is elongated within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism efficiently expels gas to extinguish the arc as the current passes through zero, culminating in a seamless and secure 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 as a beacon of innovation and excellence in the field of electrical integration. As a trailblazing high-tech enterprise, we proudly feature a highly experienced R&D, production, and service team, enriched with over 15 years of dedicated industry expertise. Our commitment to advancing technology ensures we remain at the forefront of the industry.
Our comprehensive product range includes high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, pioneering gas-insulated switchgear, and robust substations. These superior products are essential to a multitude of sectors, including the energy and chemical industries, metal smelting, extensive electric power grids, industrial manufacturing, and prestigious universities and research institutions. Furthermore, our cutting-edge solutions empower the medical and pharmaceutical sectors, support municipal commerce, enhance water conservancy and hydropower ventures, optimize road traffic infrastructures, and enrich both commercial and residential developments.
Firmly rooted in our unwavering commitment to technological innovation and the philosophy of "smart manufacturing," we are dedicated to attracting top-tier technical talent, enhancing our company's core competitive advantage. Our fervent devotion to delivering unparalleled value to clients aspires to forge the most esteemed brand within the industry. Since our inception, we have embarked on a relentless journey from inception to excellence. Our path is guided by innovation, sustained by a modern business ethos that prioritizes quality as our lifeline, market orientation, reputation-driven development, and management-driven efficiency. We diligently uphold our guiding principles of "technology as the guide, standardized management, exceptional quality, and customer satisfaction" in quality and technical talent management, working tirelessly to strengthen our market presence. Our mission is to serve China's electric power and grid transmission and distribution sectors with increasing speed, strength, and ambition. At our core, integrity is non-negotiable, quality is sacrosanct, service is paramount, and customer satisfaction is our eternal creed. Our unwavering pursuit of excellence, relentless innovation, and dedication to building a trustworthy brand are our guiding principles. Your recognition fuels our progress. We extend heartfelt gratitude to all our loyal clients for their enduring support, and Zhejiang ChaoTai 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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