Product Description
General
The Drop-Out Fuse and Pull Load Drop-Out Fuse are indispensable outdoor high-voltage protection devices. Skillfully designed as the steadfast defenders of electric systems, they are positioned on the high-voltage side of distribution transformers or within distribution lines. These fuses provide unparalleled safeguarding against transformer and line short circuits and overloads, while expertly controlling open-circuit load currents. Their robust construction showcases an insulating bracket and fuse tubes, with static contacts steadfastly mounted on each side of the insulation bracket, and moving contacts stationed at the ends of the fuse tube. Ingeniously, the fuse tube is crafted with an inner arc tube encased by an outer phenolic paper tube or epoxy glass cloth tube. To ensure superior operational performance, the pull load drop-out fuse is fitted with nimble auxiliary contacts and an arc chute, enhancing its operational dexterity, particularly when managing open or co-load currents.
In routine operations, the drop-out fuse remains closed, securely maintaining the fuse tube and fuse under tension. When a system fault occurs, the fault current swiftly melts the fuse, creating a vivid arc. The arc's intense heat generates an outflow of gas from the arc tube, elevating the internal pressure. This initiates a vertical airflow within the pipeline, adeptly elongating and stretching the arc. As the fuse blows, the tension of the moving contact is released, activating the locking mechanism, which then releases the fuse tube, guiding it into the breaking position. For load pulling, an insulating rod is employed to disengage the moving contact, initially keeping its bond with the static contact. Continued pulling with the insulating rod causes the auxiliary contacts to disengage, generating and extending an arc within the hood slit. The arc cover's gas assists in extinguishing the arc when the current approaches zero.
Use and Standards
This expertly designed product is tailored for use in 10 ~ 35KV distribution lines, branching lines, and on the primary sides of distribution transformers. It stands as a fortress of protection, shielding against overloads and short circuits, while proficiently managing the separation and union of rated load currents.
Adhering to the pinnacle of industry standards, the product model is in harmony with the JB/T8321-1996 Method for Type AC High-Voltage Fuses Preparation. It is meticulously crafted to align with the rigorous GB15166.3-1994 High Voltage Fuses Expulsion Fuses Standards. In scenarios where standards ambiguously define essential parameters and configurations, precision adjustments are made following the JB/DQ2139-1986 requirements for 10 ~ 35KV Outdoor High Voltage Drop Fuses Interim Technology.
Drop-Out Fuse Cutouts and Load Switching Fuse Cutouts are integral components for outdoor high-voltage protection. Seamlessly embedded into the incoming feeder of distribution transformers or distribution lines, they provide essential defense against short circuits and overloads, adeptly managing on/off loading currents. The Drop-Out Fuse Cutout is characterized by insulate insulator supports and a fuse tube; static contacts are securely anchored on either side of the insulator support, while moving contacts are positioned at the ends of the fuse tube. The intricate design of the fuse tube includes an inner arc-extinguishing tube, surrounded by an outer phenolic compound paper tube or epoxy glass tube. The Load Switching Fuse Cutout features resilient elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring effective management of on-off loading currents.
Under typical operating conditions, the fuse link ensures the fuse tube remains securely closed. When faults arise, fault currents quickly melt the fuse, forming an electric arc that heats the arc-extinguishing tube and releases abundant gas. This high pressure propels the arc along the tube. Once the fuse link melts, the moving contact loses tension, triggering the mechanism to lock, and the fuse tube drops out, transitioning the cutout to an open state. For cutting out during load operations, operators utilize an insulating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but further pulling disengages the auxiliary contacts, producing an electric arc that elongates within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism releases gas, ensuring the arc is extinguished as the current reaches 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. stands as a paragon in the world of electrical integration, an emblem of high-tech virtuosity. Distinguished by our relentless pursuit of innovation, supported by an illustrious team renowned for their prowess in R&D, production, and unparalleled service, we have been setting formidable benchmarks for over 15 years. Our mission is to reshape the industry landscape, consistently advancing the frontiers of excellence.
Our extensive product suite is a shining example of our dedication to superior quality, showcasing exceptional high-voltage solid-state soft starters, advanced capacitor cabinets, adaptable high and low voltage switchgear, and cutting-edge gas-insulated switchgear technologies. We further provide innovative substations, meticulously crafted to fulfill a wide spectrum of industry demands. Our solutions empower sectors ranging from dynamic energy and chemical industries to the robust realm of metal smelting and vast electric power grids. Our pioneering products have become indispensable to industrial manufacturing, esteemed universities, leading research institutions, and the flourishing medical and pharmaceutical industries. In the municipal, water conservancy, hydropower, road traffic systems, and an extensive variety of commercial and residential scenarios, our offerings stand as pillars of unmatched reliability and operational excellence.
At Zhejiang ChaoTai, our steadfast dedication to technological advancement and an ingenious 'smart manufacturing' vision propel us to draw in premier technical expertise, thereby boosting our core competitiveness. This strategic approach enables us to deliver extraordinary value to our cherished clients, underpinning our stature as a vanguard in the industry. From modest origins, we have embarked on an unprecedented growth trajectory, adopting a cutting-edge business model rooted in quality, astute market anticipation, and precision management. Our philosophy emphasizes prioritizing technology, adhering to rigorous management standards, offering superior quality, and achieving customer satisfaction. Anchored in integrity, powered by quality, and driven by the continuous quest for customer satisfaction, we are dedicated to excelling, innovating, and establishing a brand synonymous with trust. We extend our deepest gratitude to all our esteemed customers for their steadfast support and loyalty. Together with Senhang Technology, we are poised to illuminate a brighter future, united in our journey forward.
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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