Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage electrical protection. Precisely engineered, these devices are strategically positioned on the high-voltage side of distribution transformers or serve as vital links in distribution lines. They stand as critical defenses against transformer and line short circuits, overload situations, and facilitate the seamless opening and loading of current. Ingeniously crafted, the drop-out fuse consists of an insulating bracket and fuse tubes, with static contacts securely fastened at each endpoint and moving contacts elegantly attached to the fuse tube ends. The fuse tube's architecture boasts 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 heightened flexibility, featuring auxiliary contacts and an arc chute meticulously designed for smooth current load operations.
During regular operations, the drop-out fuse remains firmly closed, with the fuse tube expertly tensioned. On detecting system faults, the fault current swiftly blows the fuse, creating a powerful arc. This arc ignites the arc tube, releasing large gas volumes and generating high pressure to create a vertical wind path that stretches and elongates the arc. As the fuse blows, the moving contact releases, artfully rotating 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 used to draw out the moving contact while maintaining connection with the static contact. With continued force, auxiliary contacts separate, generating an arc that stretches within the hood slit. The arc cover efficiently contains the gas, ensuring effective arc extinguishment as the current reaches zero.
Applications and Compliance Standards
This distinguished product is precisely designed for operation 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 enabling effective separation and combination of the rated load current.
The precision-engineered design of this product adheres to the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation. Its specifications align with the esteemed GB15166.3-1994 standards for high voltage expulsion fuses. In cases lacking detailed definitions, adaptations 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 premier outdoor high-voltage protective devices. Intentionally crafted to connect with the incoming feeder of distribution transformers or lines, these devices play a critical role in safeguarding transformers and lines from short circuit incidents and overload conditions while efficiently managing the on/off load current. The drop-out fuse cutout consists of robust insulating supports and a fuse tube, with static contacts securely fixed on both sides and moving contacts expertly installed at the fuse tube ends. 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 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, enabling 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 passes through 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 luminary in the electrifying realm of electrical integration, exemplifying groundbreaking innovation and peerless excellence. As a dynamic high-tech enterprise, we are driven by a powerhouse team in R&D, production, and service, boasting over 15 years of formidable dedication and industry expertise.
Our extensive product portfolio encompasses high-voltage solid-state soft starters, cutting-edge capacitor cabinets, both high and low voltage switchgear, advanced gas-insulated switchgear, and robust substations. These premium products are vital across diverse sectors including the energy and chemical industries, metal smelting operations, expansive electrical power grids, industrial manufacturing, and esteemed universities and research institutions. Moreover, our solutions invigorate the medical and pharmaceutical realms, bolster municipal commerce, enhance water conservation and hydropower initiatives, streamline road traffic systems, and elevate commercial and residential developments.
Grounded in a steadfast commitment to technological innovation and the tenet of 'smart manufacturing,' we resolutely seek elite technical talent to fully augment our core competitive edge. Our unyielding dedication is to deliver unparalleled value to our clients, with the ambition of crafting the industry's most esteemed brand. Since our founding, we have made unwavering strides, evolving from genesis to excellence. Our path is marked by innovation and sustained by a contemporary business ethos, where quality is our lifeblood, market orientation is paramount, growth through reputation is essential, and efficiency is realized through strategic management. We faithfully adhere to the guiding principles of 'technology as the guide, standardized management, superior quality, and customer satisfaction' in our quality and technical talent management, diligently striving to amplify our market presence. Our mission is to serve China's electric power and grid transmission and distribution sectors with speed, strength, and ambition. At our heart, integrity is indispensable, quality is inviolable, service reigns supreme, and customer satisfaction is our eternal pledge. Our relentless pursuit of excellence, continual innovation, and commitment to establishing a trustworthy brand remain our guiding tenets. Your recognition fuels our progress. We express profound gratitude to all our devoted clients for their enduring support, and Senhang Technology eagerly 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.
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