Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse stand as the pinnacle of innovation in outdoor high-voltage electrical protection. Designed with precision, these devices are strategically placed on the high-voltage side of distribution transformers or serve as vital links within distribution lines. They are indispensable guardians against transformer and line short circuits and overloads, providing seamless current management for operations such as opening and loading. Their innovative design includes an insulating bracket, fuse tubes, and static contacts firmly held at each end. Moving contacts are elegantly mounted at the ends of the fuse tube, which is enhanced with an advanced inner arc tube and a durable outer phenolic paper or epoxy glass cloth tube. The Pull Load Drop-out Fuse boasts exceptional versatility with auxiliary contacts and a specially designed arc chute to ensure smooth transitions during current load changes.
In normal operations, the drop-out fuse remains securely closed, with the fuse tube precisely tensioned. When a fault occurs, the fault current rapidly blows the fuse, creating an arc that ignites the arc tube. This process decomposes a large volume of gas, generating high pressure within the tube to establish a vertical wind path that stretches the arc. As the fuse blows, the moving contact gracefully rotates outward, the locking mechanism disengages, and the fuse tube descends to a definitive breaking position. During load-pulling operations, an insulating rod is used to draw the moving contact while maintaining its connection with the static contact. As force continues, auxiliary contacts separate, producing an arc that extends within the hood slit. The arc cover effectively contains the gas, aiding in efficient arc extinguishment as the current nears zero.
Applications and Compliance Standards
Expertly crafted for installation in 10 to 35KV distribution lines, this exceptional product is suitable for both branching lines and the primary side of distribution transformers. It provides steadfast protection against overloads and short circuits, while ensuring the effective separation and combination of the rated load current.
This meticulously engineered product aligns with the rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation and meets the prestigious GB15166.3-1994 standards for high voltage fuses, specifically Expulsion fuses. In instances where specific definitions are lacking, 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 epitomize high-performance outdoor high-voltage protective devices. These devices are expertly designed to connect with the incoming feeder of distribution transformers or lines. They play a crucial role in protecting transformers and lines from short circuits and overload conditions while adeptly managing on/off load current. The drop-out fuse cutout features sturdy insulating supports and a fuse tube, with static contacts securely affixed on both sides and moving contacts expertly attached to the ends of the fuse tube. The fuse tube includes a sophisticated internal arc-extinguishing tube, complemented by an outer phenolic compound paper or epoxy glass tube. The load switching fuse cutout further incorporates high-performance elastic auxiliary contacts and an arc-extinguishing enclosure to efficiently handle on-off load current switching.
During typical operation, the fuse link keeps the fuse tube tightly closed. When faults occur, the fault current rapidly melts the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing substantial amounts of gas and creating high pressure to elongate the arc within the tube. Once melted, the moving contact loses tension, allowing the mechanism to lock and the fuse tube to gracefully drop out, transitioning to an open position. For cutout load switching, operators skillfully use an insulating operating bar to draw the moving contact. Initially, the main contact remains interconnected with the auxiliary static contact. As the auxiliary contact is further pulled, an electric arc forms between them, extending within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to efficiently extinguish the arc as the current approaches 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 groundbreaking innovation and unparalleled excellence in the vibrant world of electrical integration. As a dynamic high-tech enterprise, we are immensely proud to showcase our highly experienced R&D, production, and service team, bolstered by over 15 years of unwavering dedication and expertise in the industry.
Our expansive product range includes high-voltage solid-state soft starters, sophisticated capacitor cabinets, both high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and resilient substations. These top-notch products are essential in a myriad of sectors, serving the energy and chemical industries, metal smelting operations, sprawling electrical power grids, industrial manufacturing, and prestigious universities and research institutions. Furthermore, our innovative solutions energize the medical and pharmaceutical fields, support municipal commerce, enhance water conservation and hydropower projects, optimize road traffic systems, and elevate commercial and residential developments.
Firmly anchored in our commitment to technological innovation and the philosophy of 'smart manufacturing,' we are dedicated to attracting top-tier technical talent to comprehensively enhance our core competitive advantage. Our relentless dedication is to delivering unmatched value to our clients, with the aspiration to create the industry's most revered brand. From inception, we've 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 achieved through strategic management. We adhere steadfastly to the guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and technical talent management, diligently expanding 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 eternal 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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