Product Description
Comprehensive Overview
At the pinnacle of outdoor high-voltage defense, the Drop-out Fuse and Pull Load Drop-out Fuse stand as paragons of electrical protection. Masterfully designed, these vital components are strategically placed on the high-voltage side of distribution transformers or seamlessly integrated within distribution lines. They offer steadfast protection against transformer and line short circuits and overloads, while enabling effortless current control for opening and loading. The innovative design features an insulating bracket and fuse tubes, with stationary contacts securely mounted on each end and elegantly attached moving contacts positioned at the fuse tube's extremities. The fuse tube is enhanced with a cutting-edge inner arc tube and a robust outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse showcases exceptional adaptability with auxiliary contacts and a precision-engineered arc chute for seamless current load transitions.
In a state of normalcy, the drop-out fuse is steadfastly held in a closed position, with the fuse tube meticulously maintained under tension. When system anomalies occur, the fault current reacts with speed, causing the fuse to blow and initiating an arc. This dynamic arc fires up the arc tube, decomposing a substantial volume of gas and producing high pressure that skillfully stretches and elongates the arc vertically. As the fuse operates, the moving contact disengages, gracefully rotating outward and allowing the locking mechanism to release, enabling the fuse tube to drop decisively to a breaking position. For load operations, an insulating rod is utilized to draw out the moving contact while keeping it linked to the static contact. With consistent force, the auxiliary contacts separate, forming an arc that extends within the hood slit. The arc cover expertly contains the gas, facilitating effective arc extinction as the current approaches zero.
Applications and Compliance Standards
Crafted with precision, this esteemed product is tailored 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 ensuring effective separation and combination of the rated load current.
Designed with precision, this product adheres to the rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters are aligned with the esteemed GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In instances where definitions are not explicit, adjustments are made 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 epitomize high-performance outdoor high-voltage protection. Expertly crafted to connect with the incoming feeder of distribution transformers or lines, they serve as a crucial defense against transformer and line short circuits and overloads while efficiently managing the on/off load current. The drop-out fuse cutout features robust insulating supports and a fuse tube, with stationary contacts strategically positioned on both sides and moving contacts expertly attached at the ends of the fuse tube. The fuse tube includes an advanced internal arc-extinguishing tube, complemented by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout additionally incorporates high-performance, resilient auxiliary contacts and an arc-extinguishing enclosure for efficient load current switching.
In typical operational settings, the fuse link ensures the fuse tube remains securely closed. Upon detecting faults, the fault current rapidly melts the fuse, forming an electric arc that heats the arc-extinguishing tube, releasing significant gas volumes and creating high pressure to elongate the arc within the tube. Once the fuse is 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 utilize an insulating operating bar to draw the moving contact. Initially, the main contact stays engaged with the auxiliary static contact. As the auxiliary contact is further drawn, 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. emerges as a shining symbol of innovation and unmatched excellence in the ever-evolving world of electrical integration. As a dynamic high-tech enterprise, we proudly present a team of highly skilled professionals in R&D, production, and service, bolstered by over 15 years of steadfast dedication and industry expertise.
Our extensive portfolio boasts high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These top-tier products are vital across a myriad of sectors, including energy and chemical industries, metal smelting, sprawling electrical power grids, industrial manufacturing, and esteemed universities and research institutions. In addition, our solutions power the medical and pharmaceutical domains, bolster municipal commerce, enhance water conservation and hydropower projects, streamline road traffic systems, and elevate commercial and residential developments.
Rooted in our steadfast commitment to technological innovation and the tenet of 'smart manufacturing,' we are dedicated to attracting premier technical talent to significantly bolster our core competitive edge. Our unwavering aim is to deliver unparalleled value to our clients, striving to establish the industry's most esteemed brand. Since our inception, we have made relentless strides, evolving from origin to excellence. Our journey is driven by innovation and sustained by a forward-thinking business ethos, where quality is our lifeblood, market orientation is crucial, reputation-centered growth is vital, and efficiency is achieved through tactical management. We strictly adhere to the guiding principles of 'technology-led, standardized management, superior quality, and customer fulfillment' in our quality and technical talent management, working diligently to extend our market reach. Our mission is to serve China's electric power and grid transmission and distribution realms with increasing speed, vigor, and ambition. At our core, integrity is indispensable, quality is sacrosanct, service is paramount, and customer fulfillment is our eternal commitment. Our relentless pursuit of excellence, constant innovation, and dedication to building a reliable brand are our guiding tenets. Your endorsement fuels our advancement. We extend our deepest gratitude to all our devoted clients for their unwavering support, and Senhang Technology looks forward to collaborating 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.
Audited Supplier 
){kind=link}