Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage protection solutions. Meticulously engineered, these devices serve as crucial defenders against electrical malfunctions on the high-voltage side of distribution transformers or as essential elements in distribution lines. They act as reliable sentinels against transformer and line short circuits and overload scenarios, ensuring seamless operation in both current opening and loading. The drop-out fuse is a masterpiece of design, featuring a durable insulating bracket and fuse tubes. Static contacts are securely mounted at both ends, while moving contacts are elegantly affixed to the fuse tube ends. Ingenious construction of the fuse tube includes an advanced inner arc tube coupled with a resilient outer phenolic paper tube or epoxy glass cloth tube. Uniquely, the Pull Load Drop-out Fuse integrates superior flexibility with auxiliary contacts and a precisely engineered arc chute, ensuring smooth current load operations with unmatched efficiency.
During normal operation, the drop-out fuse remains firmly locked in a closed position, with the fuse tube tightly tensioned. When system faults occur, the fault current swiftly blows the fuse and generates a powerful arc. This dynamic arc activates the arc tube, decomposing substantial gas volumes and generating high pressure within the tube to form a vertical wind path. This path expertly elongates and stretches the arc. As the fuse blows, the moving contact releases gracefully, rotating outward as the locking mechanism disengages. This action allows the fuse tube to drop, achieving a decisive breaking position. For load pulling, an insulating rod is employed to draw out the moving contact while maintaining connection with the static contact. With continued force application, the auxiliary contacts separate, generating an arc between them that gracefully stretches within the hood slit. The arc cover expertly contains the gas, enabling efficient arc extinguishment as the current reaches zero.
Applications and Compliance Standards
This distinguished product is meticulously crafted for integration in 10 to 35KV distribution lines, encompassing branching lines and the primary side of distribution transformers. It offers unwavering protection against overloads and short circuits, whilst enabling seamless separation and combination of rated load currents.
The meticulously engineered design of this product complies with the stringent 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 not provided, 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 stand as quintessential outdoor high-voltage protective devices. Exquisitely crafted to integrate with the incoming feeder of distribution transformers or lines, they safeguard transformers and lines from short circuit events and overload conditions, while adeptly managing on/off load current. The drop-out fuse cutout features robust insulating supports and a sophisticated fuse tube, with static contacts securely positioned on both sides and moving contacts skillfully installed at the fuse tube's ends. The fuse tube boasts an advanced internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also encompasses enhanced, elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring efficient on-off load current switching with superior performance.
In typical operational scenarios, the fuse link guarantees that the fuse tube remains securely closed. Faced with faults, the fault current promptly melts the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing substantial gas volumes and creating high pressure to stretch the arc within the tube. Post-melting, the moving contact loses tension, allowing the mechanism to lock and the fuse tube to drop out, transitioning smoothly to an open position. For cutout load switching, operators use 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. Concurrently, the arc-extinguishing mechanism expels gas, achieving efficient arc extinguishment as the current crosses 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. stands as a beacon of groundbreaking innovation and unparalleled excellence within the sphere of electrical integration. As a vibrant high-tech enterprise, we are proud to showcase a highly experienced R&D, production, and service team, empowered by over 15 years of unwavering dedication and expertise in the industry.
Our expansive product range features 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 high-caliber products are indispensable across numerous sectors, serving the energy and chemical industries, metal smelting operations, vast electrical power grids, industrial manufacturing, and prestigious universities and research institutions. Furthermore, our 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.
Anchored in a firm commitment to technological innovation and the philosophy of 'smart manufacturing,' we are resolute in attracting top-tier 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. Since our inception, we have tirelessly advanced, evolving from inception to excellence. Our journey is illuminated by innovation and sustained by a modern business ethos, where quality is our lifeline, market orientation is paramount, reputation-driven growth is essential, 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 remains our perpetual creed. Our relentless pursuit of excellence, constant innovation, and commitment to building a trustworthy brand remain our guiding principles. Your recognition fuels our journey. 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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