Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage electrical protection solutions. Precision-engineered, these devices are meticulously placed on the high-voltage side of distribution transformers or integrated as key support components within distribution lines. They serve as essential guardians against transformer and line short circuits, overload scenarios, and enable the smooth opening and load handling of current. Ingeniously crafted, the drop-out fuse features an insulating bracket and fuse tubes, with static contacts firmly positioned at each end and moving contacts artfully attached to the fuse tube ends. The fuse tube's construction boasts an intricate inner arc tube coupled with a robust outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse distinguishes itself with superior flexibility, incorporating auxiliary contacts and an arc chute meticulously crafted for seamless current load operations.
During standard operations, the drop-out fuse remains securely latched in a closed position, with the fuse tube precisely tensioned for optimum performance. When system faults are detected, the fault current reacts promptly, blowing the fuse and initiating an arc. This potent arc energizes the arc tube, breaking down large gas volumes and generating substantial pressure within the tube to craft a vertical wind path that skillfully stretches and elongates the arc. As the fuse blows, the moving contact is released, rotating smoothly outward while the locking mechanism disengages, allowing the fuse tube to drop and achieve a definitive breaking position. When load pulling is necessary, an insulating rod is employed to draw out the moving contact while maintaining connection with the static contact. With continued force application, auxiliary contacts separate, producing an arc between them that stretches within the hood slit. The arc cover proficiently contains the gas, facilitating efficient arc extinguishment as the current descends to zero.
Applications and Compliance Standards
This prestigious product is expertly designed for deployment in 10 to 35KV distribution lines, encompassing branching lines and the primary side of distribution transformers. It delivers unwavering protection against overloads and short circuits while facilitating effective separation and combination of the rated load current.
The precision-crafted design of this product complies with the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters align with the distinguished GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In instances lacking detailed definitions, adjustments are meticulously crafted 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 elite outdoor high-voltage protective devices. Purposefully crafted to connect with the incoming feeder of distribution transformers or lines, they play an instrumental role in safeguarding transformers and lines from short circuit incidents and overload conditions while proficiently managing the on/off load current. The drop-out fuse cutout comprises robust insulating insulator supports and a fuse tube, with static contacts securely affixed on both sides and moving contacts expertly positioned at the ends of the fuse tube. The fuse tube features a sophisticated internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also includes 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, releasing substantial gas volumes and creating high pressure to elongate the arc within the tube. After melting, the moving contact loses tension, activating the mechanism to lock and allowing the fuse tube to drop out, transitioning to an open position. For cutout load switching, operators utilize an insulating operating bar to withdraw the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact is further retracted, an electric arc forms between them, extending within the arc-extinguishing enclosure gap. Concurrently, 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. shines as a lighthouse of groundbreaking innovation and peerless excellence in the realm of electrical integration. As a dynamic high-tech enterprise, we proudly present a team enriched with profound experience in R&D, production, and service, fortified by over 15 years of steadfast dedication and profound expertise in the industry.
Our expansive portfolio boasts high-voltage solid-state soft starters, advanced capacitor cabinets, both high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These premium products are critical across diverse sectors, energizing the energy and chemical industries, metal smelting processes, massive electrical power networks, and industrial manufacturing, as well as serving prestigious universities and esteemed research institutions. Moreover, our solutions power the medical and pharmaceutical arenas, support municipal commerce, fortify water conservation and hydropower projects, optimize road traffic systems, and enhance both commercial and residential developments.
Rooted in a steadfast commitment to technological innovation and guided by the philosophy of 'smart manufacturing,' we are dedicated to attracting elite technical talent to substantially elevate our core competitive edge. Our unwavering dedication is to deliver unparalleled value to our clients, striving to craft the industry's most esteemed brand. From our foundation, we've embarked on a relentless journey of transformation, evolving from inception to excellence. This journey is fuelled by innovation and sustained by a modern business ethos, where quality is our lifeline, market focus is vital, growth driven by reputation is essential, and efficiency is achieved through strategic management. We unwaveringly adhere to the guiding principles of 'technology-led, standardized management, superior quality, and customer satisfaction' in our quality and talent management, diligently expanding our market presence. Our mission is to serve China's electric power and grid transmission and distribution sectors with accelerating speed, strength, and ambition. At our core, integrity remains sacrosanct, quality is untouchable, service reigns supreme, and customer satisfaction is our perpetual creed. Our relentless pursuit of excellence, constant innovation, and dedication to building a trustworthy brand are our guiding principles. Your recognition fuels our progress. We express our sincere gratitude to all our loyal clients for their enduring support, and Senhang Technology eagerly anticipates collaborating with you to forge a dazzling 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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