Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse stand as the pinnacle of outdoor high-voltage electrical protection solutions. Expertly crafted with meticulous precision, these devices are strategically deployed on the high-voltage side of distribution transformers or as essential support links within distribution lines. They serve as indispensable guardians against transformer and line short circuits, safeguarding against overload conditions, and enabling seamless current opening and loading operations. Ingeniously constructed, the drop-out fuse consists of an insulating bracket paired with fuse tubes, with static contacts firmly affixed at each end and moving contacts gracefully attached to the ends of the fuse tube. The fuse tube's architecture showcases a sophisticated inner arc tube, elegantly paired with a resilient outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse distinguishes itself with superior flexibility, featuring auxiliary contacts and an arc chute meticulously engineered for smooth and efficient current load operations.
During standard operations, the drop-out fuse remains securely locked in a closed position, with the fuse tube precisely tensioned for optimal performance. Upon detection of system faults, the fault current acts with swift precision, blowing the fuse and initiating an arc. This powerful arc ignites the arc tube, decomposing substantial gas volumes and generating high pressure within the tube to craft a vertical wind path that skillfully stretches and elongates the arc. As the fuse blows, the moving contact releases, rotating gracefully outwards while the locking mechanism disengages, allowing the fuse tube to drop into a decisive breaking position. When load pulling becomes necessary, an insulating rod is employed to draw out the moving contact while maintaining connection with the static contact. Continued application of force prompts the 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 distinguished product is meticulously crafted 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 enabling effective separation and combination of the rated load current.
The precision-engineered design of this product rigorously adheres to the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation standards, ensuring unrivaled reliability. Its parameters align seamlessly with the prestigious GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In cases where detailed definitions are absent, adjustments are meticulously crafted in accordance with the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses, ensuring unmatched performance and compliance.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are heralded as premier outdoor high-voltage protective devices. Purposefully designed to connect with the incoming feeder of distribution transformers or lines, they play a pivotal 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 is composed of robust 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's design features a sophisticated internal arc-extinguishing tube, elegantly paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is further enhanced with 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 securely closed. When faults arise, 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. Following the melting process, the moving contact loses tension, allowing the mechanism to lock and the fuse tube to drop out, transitioning to an open position with seamless efficiency. 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, ensuring stability. 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, ensuring safe and efficient operation.
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 leader of groundbreaking innovation and unmatched excellence in the realm of electrical integration. As a dynamic high-tech enterprise, we proudly feature a highly skilled R&D, production, and service team, powered by over 15 years of steadfast dedication and industry expertise.
Our vast product lineup includes high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These top-tier products are essential across various sectors, energizing the energy and chemical industries, metal smelting operations, expansive electrical power grids, industrial manufacturing, and renowned universities and research institutions. In addition, our solutions empower the medical and pharmaceutical fields, bolster municipal commerce, enhance water conservation and hydropower projects, optimize road traffic systems, and uplift commercial and residential developments.
Rooted in a steadfast commitment to technological innovation and the ethos of 'smart manufacturing,' we are dedicated to attracting premier technical talent to robustly enhance our core competitive edge. Our dedication lies in offering unrivaled value to our clients, aiming to cultivate the industry's most esteemed brand. From our inception, we have consistently advanced, transforming from concept to excellence. Our path is forged with innovation and sustained by a modern business ethos, where quality is our lifeline, market orientation is essential, reputation-driven growth is paramount, and efficiency is achieved through strategic management. We rigorously follow 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 footprint. 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 sacrosanct, service is paramount, and customer satisfaction is our enduring creed. Our relentless pursuit of excellence, ceaseless innovation, and commitment to building a trustworthy brand remain our guiding principles. Your recognition fuels 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.
Audited Supplier 
){kind=link}