Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse epitomize the zenith of outdoor high-voltage electrical protection. These precision-engineered devices are strategically positioned on the high-voltage side of distribution transformers or serve as critical links in distribution lines. They act as essential guardians against transformer and line short circuits, and overload conditions, while facilitating the smooth opening and loading of current. Meticulously crafted, the drop-out fuse consists of an insulating bracket and fuse tubes, with static contacts securely affixed at each end and moving contacts gracefully attached to the ends of the fuse tube. The construction of the fuse tube boasts a sophisticated inner arc tube paired with a robust outer phenolic paper tube or epoxy glass cloth tube for enhanced durability. The Pull Load Drop-out Fuse showcases superior flexibility, featuring auxiliary contacts and an arc chute meticulously engineered for seamless current load operations.
In normal operational conditions, the drop-out fuse is securely locked in a closed position, with the fuse tube precisely tensioned. Upon detecting system faults, the fault current acts swiftly, blowing the fuse and generating an arc. This dynamic arc ignites the arc tube, decomposing large gas volumes and generating high pressure within the tube to create a vertical wind path that skillfully stretches and elongates the arc. As the fuse blows, the moving contact releases, rotating elegantly outwards while the locking mechanism disengages, allowing the fuse tube to drop and achieve a decisive breaking position. When load pulling is required, an insulating rod is employed to draw out the moving contact while maintaining the connection with the static contact. With continued application of force, auxiliary contacts separate, generating an arc between them that stretches within the hood slit. The arc cover adeptly contains the gas, facilitating efficient arc extinguishment as the current reaches zero.
Applications and Compliance Standards
This prestigious product is meticulously crafted for use 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 enabling effective separation and combination of the rated load current.
The precision-engineered design of this product adheres to the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters align with the renowned GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In cases where detailed definitions are lacking, adjustments are crafted 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 stand as premier outdoor high-voltage protective devices. Expertly designed to connect with the incoming feeder of distribution transformers or lines, they play a vital 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 comprises resilient insulating insulator supports and a fuse tube, with static contacts fixed on both sides and moving contacts expertly installed at the ends of the fuse tube. The fuse tube features a sophisticated internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube for enhanced protection. The load switching fuse cutout also includes enhanced, 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 remains firmly closed. Upon encountering faults, the fault current melts the fuse swiftly, generating an electric arc that heats the arc-extinguishing tube, releasing substantial gas volumes and creating high pressure to elongate the arc within the tube. Post-melting, the moving contact loses tension, enabling the mechanism to lock and the fuse tube to drop out, transitioning to an open position. For cutout load switching, operators utilize an insulating operating bar to pull the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact is further pulled, an electric arc forms between them, elongating 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. is a beacon of innovation and excellence in electrical integration. As a dynamic high-tech enterprise, we proudly present our highly experienced R&D, production, and service team. With over 15 years of unwavering dedication and expertise, we stand at the forefront of the industry.
Our extensive product portfolio boasts high-voltage solid-state soft starters, sophisticated capacitor cabinets, high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These premium products are vital across numerous sectors, including energy, chemical industries, metal smelting, massive electrical grids, industrial manufacturing, as well as prestigious universities and research institutions. Additionally, our innovative solutions empower the medical and pharmaceutical sectors, support municipal commerce, enhance water conservation and hydropower, optimize road traffic systems, and elevate commercial and residential developments.
Rooted in our steadfast commitment to technological innovation and the philosophy of 'smart manufacturing,' we are dedicated to attracting top-tier technical talent to enhance our core competitive edge. Our unwavering mission is to deliver unparalleled value to our clients while aspiring to become the industry's most esteemed brand. Since our inception, we've evolved from the roots of innovation to the pinnacle of excellence. Our journey is driven by a modern business ethos, where quality is our lifeline, market orientation is essential, reputation-driven growth is crucial, and efficiency is achieved through strategic management. We adhere strictly to the principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in managing quality and technical talent, as we diligently expand our market presence. Our mission is to serve China's electric power and grid transmission and distribution sectors with speed, strength, and ambition. At our core, integrity is non-negotiable, quality is inviolable, service is sovereign, and customer satisfaction is our eternal creed. Our relentless pursuit of excellence, continuous 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 unwavering support, and Senhang Technology eagerly anticipates partnering 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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