Product Description
General
Our Drop-out Fuse and Pull Load Drop-out Fuse are at the forefront of outdoor high-voltage electrical protection, epitomizing excellence in safeguarding your power systems. Expertly designed, these devices are strategically placed on the high-voltage side of distribution transformers or integrated as crucial support links in distribution lines. They are your first line of defense against transformer and line short circuits, overloads, and enable the seamless opening and management of current loads. The drop-out fuse is a marvel of engineering, crafted from an insulating bracket and fuse tubes, featuring static contacts affixed at either end of the bracket and moving contacts artfully attached to the fuse tube ends. The fuse tube showcases an innovative construction with an inner arc tube paired with an outer phenolic paper tube or epoxy glass cloth tube for superior performance. Our Pull Load Drop-out Fuse elevates functionality with the addition of auxiliary contacts and an arc chute, meticulously crafted for flawless current load operations.
In day-to-day operations, our drop-out fuse remains securely closed, with the fuse tube precisely tensioned for optimal performance. When faced with a system malfunction, the fault current rapidly melts the fuse, creating an arc. This arc ignites the arc tube, catalyzing the decomposition of a substantial gas volume, generating intense pressure within the tube, and forming a vertical wind path. This ingenious process dramatically stretches and elongates the arc, ensuring swift fault isolation. Post-fuse operation, the moving contact releases, rotating outwards, as the locking mechanism disengages, allowing the fuse tube to descend into a breaking position. For load pulling, an insulating rod is employed to expertly manipulate the moving contact while maintaining engagement with the static contact. With diligent effort, the auxiliary contacts separate, generating an arc that stretches within the hood slit. The arc cover, infused with gas, expertly facilitates arc extinguishment as the current approaches zero, ensuring a safe and reliable operation.
Use and Standards
Engineered for excellence, this product is purpose-built for deployment across 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. Its robust design provides formidable protection against overloads and short circuits, while ensuring efficient separation and combination of the rated load current, making it an indispensable asset in power distribution.
Crafted with meticulous precision, this product aligns with the JB/T8321-1996 Method for AC high-voltage fuse preparation standards. The product parameters are in strict conformity with GB15166.3-1994 high voltage fuses - Expulsion fuses standards. In scenarios where standards lack comprehensive definitions of critical parameters and configurations, adjustments are seamlessly made in accordance with the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses, ensuring consistent, reliable performance.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are paragon outdoor high-voltage protective devices. Expertly crafted to seamlessly integrate with incoming feeders of distribution transformers or lines, they vigilantly protect against short circuit incidents and overload conditions while adeptly managing on/off load current. The drop-out fuse cutout is a testament to superior design, featuring insulating insulator supports and a fuse tube, with static contacts strategically placed on both sides of the insulator support and moving contacts skillfully installed at the fuse tube ends. The fuse tube is fortified with an internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube, ensuring exceptional performance. The load switching fuse cutout is enhanced with resilient auxiliary contacts and an arc-extinguishing enclosure for proficient on-off load current switching.
In standard operational scenarios, our fuse link ensures the fuse tube remains tightly secured in a closed position. When faults arise, the fault current promptly melts the fuse link, initiating an electric arc. This process heats the arc-extinguishing tube, releasing a substantial volume of gas, creating high pressure and elongating the arc throughout the tube. Upon fuse link melting, the moving contact tension is released, allowing the mechanism to lock, and the fuse tube to drop out, transitioning smoothly to an open position. For load switching during cutout, operators utilize an insulating operating bar to expertly manipulate the moving contact. Initially, the main contact engages with the auxiliary static contact. As the auxiliary contact is strategically pulled, an electric arc forms between them, elongating within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism efficiently expels gas to extinguish the arc as the current reaches zero, ensuring a safe and reliable transition.
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 unparalleled excellence in the world of electrical integration. As a vibrant high-tech enterprise, we pride ourselves on a seasoned team excelling in R&D, production, and service, enriched by over 15 years of profound industry expertise.
Our expansive product array includes high-voltage solid-state soft starters, capacitor cabinets, advanced high and low voltage switchgear, innovative gas-insulated switchgear, and durable substations. These high-performance products are essential across a broad spectrum of sectors, including energy, chemical industries, metal smelting, vast electric power grids, and industrial manufacturing. They also support prestigious universities, research institutions, medical and pharmaceutical sectors, enhance municipal commerce, improve water conservancy and hydropower projects, optimize road traffic systems, and enrich commercial and residential developments.
Rooted in a steadfast commitment to technological innovation and guided by the philosophy of 'smart manufacturing,' we focus on attracting top-tier technical talent to elevate our core competitive edge. We are devoted to delivering unmatched value to our clients and aspire to establish the most esteemed brand within the industry. From our inception, we have relentlessly journeyed towards excellence, with innovation as our beacon and a modern business ethos as our foundation. Our ethos emphasizes quality as our lifeline, market orientation, reputation-driven growth, and management-driven efficiency. We 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, as we work diligently 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. Integrity is non-negotiable, quality is inviolable, service is supreme, and customer satisfaction is our eternal creed. Our relentless pursuit of excellence, innovation, and dedication to building a trustworthy brand remain our guiding principles. Your recognition propels our progress. We extend heartfelt gratitude to our loyal clients for their enduring support, as 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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