Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse are the pinnacle of outdoor high-voltage electrical protection. Engineered with unparalleled precision, these devices are strategically stationed on the high-voltage side of distribution transformers or as essential support links in distribution lines. They serve as crucial safeguards against transformer and line short circuits, overload conditions, and facilitate the seamless opening and loading of current. Artfully crafted, the drop-out fuse comprises an insulating bracket and fuse tubes, with static contacts securely attached at each end and moving contacts elegantly affixed to the ends of the fuse tube. The fuse tube's construction features a sophisticated inner arc tube paired with a durable 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 designed for smooth current load operations.
In standard operations, the drop-out fuse remains securely locked in a closed position, with the fuse tube perfectly tensioned. Upon detecting system faults, the fault current acts with precision, blowing the fuse and creating an arc. This powerful arc ignites the arc tube, decomposing large gas volumes and generating high pressure within the tube to form a vertical wind path that expertly stretches and elongates the arc. As the fuse blows, the moving contact releases, rotating outward gracefully while the locking mechanism disengages, allowing the fuse tube to drop and achieve a decisive breaker's position. When load pulling is necessary, an insulating rod is employed to draw out the moving contact while maintaining engagement with the static contact. With continuous force, auxiliary contacts separate, generating an arc between them that stretches within the hood slit. The arc cover adeptly contains the gas, ensuring efficient arc extinguishment as the current reaches zero.
Applications and Compliance Standards
This remarkable product is meticulously designed 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 complies with the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters are aligned with the revered GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In situations where detailed definitions are absent, adjustments are crafted following 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 premier outdoor high-voltage protective devices. Intentionally designed to connect with the incoming feeder of distribution transformers or lines, they play an indispensable role in protecting transformers and lines from short circuit events and overload conditions while expertly managing the on/off load current. The drop-out fuse cutout comprises robust insulating insulator supports and a fuse tube, with static contacts securely fixed on both sides and moving contacts expertly installed 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. Additionally, the load switching fuse cutout 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 tightly 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. Post-melting, the moving contact loses tension, allowing 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 to efficiently extinguish the arc as the current traverses 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 true paragon of groundbreaking innovation and unrivaled excellence within the realm of electrical integration. As a dynamic high-tech enterprise, we proudly present a highly seasoned team of R&D experts, production specialists, and dedicated service professionals, all bolstered by over 15 years of steadfast dedication and unparalleled expertise within the industry.
Our extensive product lineup boasts an array of advanced solutions, including high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These superior-grade products are indispensable across a myriad of industries, empowering the energy and chemical sectors, metal smelting enterprises, expansive power grids, industrial manufacturing units, and illustrious universities and research institutions. Moreover, our innovative solutions invigorate the medical and pharmaceutical fields, bolster municipal commerce, enhance water conservation and hydropower initiatives, optimize road traffic systems, and elevate both commercial and residential developments to new heights.
Firmly rooted in our unwavering commitment to technological innovation and the philosophy of 'smart manufacturing,' we are resolute in attracting elite technical talent to significantly amplify our core competitive advantage. We are passionately dedicated to delivering unparalleled value to our clients, aspiring to forge the industry's most esteemed brand. Since our inception, we have made relentless strides, evolving from our founding principles to a pinnacle of excellence. Our journey is paved with innovation, sustained by a modern business ethos where quality is our lifeline, market orientation is paramount, reputation-driven growth is crucial, and strategic management ensures efficiency. We steadfastly adhere to the guiding principles: 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and technical talent management, diligently working to broaden our market impact. Our mission is to serve China's electric power and grid transmission and distribution sectors with increasing vigor, agility, and ambition. At our core, integrity is non-negotiable, quality is inviolable, service is sovereign, and customer satisfaction is our enduring creed. Our relentless pursuit of excellence, constant innovation, and commitment to crafting a trustworthy brand remain our guiding principles. Your recognition propels our progress, and we extend our heartfelt gratitude to all our loyal clients for their steadfast support. 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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