Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage electrical protection technology. Masterfully engineered, these cutting-edge devices are strategically positioned on the high-voltage side of distribution transformers or as indispensable components within distribution lines. As vital sentinels, they protect against transformer and line short circuits, manage overload scenarios, and facilitate seamless current management for opening and loading. With a design that radiates innovation, the drop-out fuse comprises an insulating bracket and fuse tubes, adeptly securing static contacts at each end, while elegantly affixed moving contacts at the ends of the fuse tube add a touch of finesse. The fuse tube features an advanced inner arc tube, paired with a robust outer phenolic paper tube or epoxy glass cloth tube, ensuring durability and reliability. The Pull Load Drop-out Fuse stands out for its exceptional versatility, boasting auxiliary contacts and a meticulously designed arc chute for smooth and controlled current load transitions.
In normal operation, the drop-out fuse remains securely fastened in a closed position, with the fuse tube precisely tensioned. Upon detection of system faults, the fault current acts quickly, blowing the fuse and igniting an arc. This dynamic arc activates the arc tube, decomposing a substantial volume of gas and creating high pressure within the tube to forge a vertical wind path that expertly stretches and elongates the arc. As the fuse blows, the moving contact gracefully releases, rotating outwards with poise while the locking mechanism disengages, allowing the fuse tube to drop decisively into a breaking position. When load pulling is required, an insulating rod is skillfully used to draw out the moving contact while maintaining a link with the static contact. With continuous force application, auxiliary contacts separate, generating an arc that stretches within the hood slit. The arc cover adeptly contains the gas, ensuring efficient arc extinguishment as the current approaches zero.
Applications and Compliance Standards
This exceptional product is meticulously engineered for deployment in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It provides unwavering protection against overloads and short circuits, while ensuring effective separation and combination of the rated load current.
The precision-engineered design of this product strictly adheres to the rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters align with the prestigious GB15166.3-1994 standards for high voltage fuses, specifically expulsion fuses. In cases where detailed definitions are absent, adjustments are tailored in accordance with 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 epitomize high-performance outdoor high-voltage protective technologies. Meticulously crafted to connect with the incoming feeder of distribution transformers or lines, they play a crucial role in safeguarding transformers and lines from short circuit incidents and overload conditions, while skillfully managing the on/off load current. The drop-out fuse cutout consists of sturdy insulating supports and a fuse tube, with static contacts precisely fixed on both sides and moving contacts expertly attached at the ends of the fuse tube. The fuse tube features a sophisticated internal arc-extinguishing tube, complemented by an outer phenolic compound paper tube or epoxy glass tube, ensuring longevity and resilience. The load switching fuse cutout also incorporates high-performance, elastic auxiliary contacts and an arc-extinguishing enclosure for efficient on-off load current switching.
In typical operational scenarios, the fuse link ensures the fuse tube stays tightly closed. Upon encountering faults, the fault current swiftly melts the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing volumes of gas and creating high pressure to elongate the arc within the tube. Once melted, the moving contact loses tension, allowing the mechanism to unlock, and the fuse tube to gracefully drop out, transitioning to an open position. For cutout load switching, operators deftly use an insulating operating bar to draw the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact is further drawn, an electric arc forms between them, stretching within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to efficiently extinguish the arc as the current passes through 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. radiates as a beacon of groundbreaking innovation and unparalleled excellence within the dynamic realm of electrical integration. A vibrant high-tech enterprise, we proudly present our esteemed R&D, production, and service team, fortified by over 15 years of unwavering dedication and profound expertise in the industry.
Our expansive product range is a testament to our dedication, featuring high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and resilient substations. These high-caliber products are essential across various sectors, energizing the energy and chemical industries, metal smelting operations, vast electrical power grids, industrial manufacturing, and prestigious universities and research institutions. Moreover, our solutions invigorate the medical and pharmaceutical fields, support municipal commerce, enhance water conservation and hydropower projects, optimize road traffic systems, and elevate both commercial and residential developments.
Anchored in a firm commitment to technological innovation and the tenets of 'smart manufacturing,' we are resolute in attracting elite technical talent to comprehensively enhance our core competitive advantage. Our unwavering dedication lies in delivering unmatched value to our clients, aspiring to create the industry's most revered brand. From our inception, we have made relentless progress, evolving from inception to excellence. Our journey is paved with innovation and sustained by a modern business ethos, where quality is our lifeline, market orientation is key, reputation-driven growth is paramount, and efficiency is realized through strategic management. We steadfastly adhere to the guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and technical talent management, diligently working to expand 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 inviolable, service is sovereign, and customer satisfaction is our perennial creed. Our relentless pursuit of excellence, constant innovation, and commitment to building a trustworthy brand remain our guiding principles. Your recognition propels our progress. We extend our heartfelt gratitude to all our loyal clients for their enduring support, and Senhang Technology eagerly anticipates partnering with you to shape 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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