Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse are the pinnacle of outdoor high-voltage electrical protection, meticulously engineered for excellence. Strategically positioned on the high-voltage side of distribution transformers or integrated as essential support links in distribution lines, these devices serve as critical shields against transformer and line short circuits, as well as overload conditions. They facilitate seamless opening and loading of currents with unparalleled precision. Ingeniously crafted, the drop-out fuse features an insulating bracket and fuse tubes, where static contacts are securely affixed at each end, while moving contacts are elegantly attached to the ends of the fuse tube. The construction of the fuse tube is sophisticated, featuring an inner arc tube with a durable outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse is distinguished by its enhanced flexibility, boasting auxiliary contacts and an arc chute meticulously designed to ensure smooth current load operations.
In standard operations, the drop-out fuse remains securely locked in a closed position with the fuse tube precisely tensioned for unwavering reliability. Upon detecting system faults, the fault current acts swiftly, blowing the fuse and generating an arc. This powerful arc ignites the arc tube, decomposing large gas volumes to generate high pressure within the tube, creating a vertical wind path that adeptly stretches and elongates the arc. As the fuse blows, the moving contact releases, gracefully rotating outwards while the locking mechanism disengages, allowing the fuse tube to drop and achieve a decisive breaking position. For necessary load pulling, an insulating rod is used to draw out the moving contact while maintaining connection with the static contact. Continued force application causes auxiliary contacts to separate, generating an arc between them that stretches within the hood slit. The arc cover expertly contains the gas, facilitating efficient arc extinguishment as the current reaches zero.
Applications and Compliance Standards
This illustrious product is meticulously engineered for use in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It offers steadfast protection against overloads and short circuits, enabling effective separation and combination of the rated load current with unwavering reliability.
The precision-engineered design of this product adheres to the rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation, ensuring supreme quality. Its parameters align with the esteemed GB15166.3-1994 standards for high voltage fuses Expulsion fuses, guaranteeing top-tier performance. In instances 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, ensuring adaptability and compliance.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout stand as premier outdoor high-voltage protective devices, intentionally crafted for optimal performance. 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 adeptly managing the on/off load current. The drop-out fuse cutout features robust insulating insulator supports and a high-performance fuse tube, with static contacts fixed on both sides and moving contacts expertly installed at the fuse tube's ends. The fuse tube boasts a sophisticated internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout includes enhanced, elastic auxiliary contacts and an arc-extinguishing enclosure for efficient on-off load current switching, ensuring superior operational integrity.
In typical operational scenarios, the fuse link ensures the fuse tube remains tightly closed, providing consistent protection. Upon encountering faults, the fault current rapidly melts the fuse, 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 unlock 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 for efficient arc extinguishment as the current seamlessly 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. 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.
Rooted in a resolute commitment to technological innovation and a philosophy of 'smart manufacturing,' our company remains dedicated to attracting top-tier technical talent, enhancing our core competitive advantage. Our unwavering dedication lies in delivering unmatched value to our clients and aspiring to create the industry's most revered brand. From the outset, our journey has been marked by relentless progress, evolving from inception to excellence. This path is paved with innovation and sustained by a modern business ethos, where quality is our lifeline, market orientation is key, and reputation-driven growth is paramount. Efficiency is achieved through strategic management, and we steadfastly adhere to the guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in quality and technical talent management. Our mission is to diligently expand our market presence and 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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