Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse epitomize the pinnacle of outdoor high-voltage electrical protection. These meticulously crafted devices are strategically positioned on the high-voltage side of distribution transformers or serve as essential support links within distribution lines. They stand as crucial guardians against transformer and line short circuits, adeptly handling overload conditions, and ensuring the seamless opening and loading of current. Ingeniously designed, the drop-out fuse features an insulating bracket and fuse tubes, with static contacts firmly secured at each end and moving contacts elegantly affixed to the fuse tube's extremities. The fuse tube's construction boasts a sophisticated inner arc tube, matched with a robust outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse distinguishes itself with enhanced versatility, incorporating auxiliary contacts and an arc chute intricately engineered for smooth current load operations.
During typical operations, the drop-out fuse remains firmly closed, with the fuse tube under precise tension. Upon the detection of system faults, the fault current swiftly blows the fuse, generating an arc that ignites the arc tube. This process decomposes significant gas volumes, producing high pressure that creates a vertical wind path to skillfully stretch and elongate the arc. As the fuse blows, the moving contact releases, elegantly rotating outward as the locking mechanism disengages, allowing the fuse tube to drop and reach a decisive breaking position. For load pulling tasks, an insulating rod is employed to draw out the moving contact while maintaining connection with the static contact. With continued application of force, auxiliary contacts separate, generating an arc between them that stretches within the hood slit. The arc cover effectively contains the gas, enabling efficient arc extinguishment as the current approaches zero.
Applications and Compliance Standards
This esteemed product is meticulously crafted for application 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 while facilitating effective separation and combination of the rated load current.
The precision-engineered design of this product meticulously aligns with the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters are in conformance with the esteemed GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In situations where detailed definitions are absent, adaptations 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 are celebrated as premier outdoor high-voltage protective devices. Purposefully crafted to connect with the incoming feeder of distribution transformers or lines, they play an indispensable role in safeguarding transformers and lines from short circuit occurrences and overload conditions while expertly managing the on/off load current. The drop-out fuse cutout consists of robust insulating insulator supports paired with a fuse tube, with static contacts securely positioned on both sides and moving contacts masterfully installed at the ends of the fuse tube. The fuse tube features an advanced internal arc-extinguishing tube complemented by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also incorporates enhanced, 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. Upon encountering faults, the fault current swiftly melts the fuse, generating an electric arc that heats the arc-extinguishing tube. This process releases substantial gas volumes, creating high pressure that skillfully elongates 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 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 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 renowned leader in the realm of electrical integration, distinguished by its innovation and superior quality. As a dynamic high-tech enterprise, we boast a formidable R&D, production, and service team that thrives on more than 15 years of steadfast dedication and industry expertise.
Our diverse array of products includes cutting-edge high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, premium gas-insulated switchgear, and robust substations. These exemplary products play a vital role across various industries, powering the energy and chemical sectors, metal smelting facilities, sprawling electrical power grids, and industrial manufacturing sites. They also support esteemed universities and research centers, amplify the medical and pharmaceutical industries, drive municipal commerce, and are crucial to water conservation, hydropower, road traffic systems, and the enhancement of commercial and residential projects.
Firmly rooted in the pursuit of technological advancement and driven by a 'smart manufacturing' ethos, we are committed to attracting elite technical talent to significantly reinforce our competitive edge. Our focus is on delivering unparalleled value to clients, with the ambition of creating the most esteemed brand in the industry. From our humble beginnings to our current prominence, our trajectory is marked by continuous innovation and modern business practices, where quality is our foundation, market orientation is vital, growth is reputation-driven, and efficiency is achieved through strategic management. We adhere rigorously to the principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our approach to quality and talent management, while diligently expanding our market reach. Our mission is to bolster China's electric power and transmission sectors with increasing speed, strength, and ambition. At our core, integrity is sacrosanct, quality is paramount, service is supreme, and customer satisfaction is our enduring commitment. Our unwavering pursuit of excellence and dedication to brand reliability are the cornerstones of our philosophy. Your support is our motivation, and we cherish our clients' loyalty. Senhang Technology looks forward with great anticipation to collaborating with you to create 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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