Product Description
General
Crafted for excellence, our Drop-out Fuse and Load Drop-out Fuse serve as the quintessential outdoor high-voltage electrical guardians. These devices grace the high-voltage side of distribution transformers or link seamlessly with distribution lines, providing short circuit and overload protection while managing co-load current with finesse. The drop-out fuse's robust design consists of an insulating bracket and fuse tubes, where static contacts are securely mounted at each end of the bracket, while moving contacts are fixed to the ends of the fuse tube. This ingenious construction features an inner arc tube paired with an outer phenolic paper tube or epoxy glass cloth tube. The load drop-out fuse elevates performance with flexible auxiliary contacts and an arc chute designed for effective co-load current management.
During regular operation, the drop-out fuse tube, under tension, remains firmly in the closed position. In the event of a system fault, the fault current immediately fuses, forming an arc. This results in the electric arc igniting the arc tube, releasing a substantial amount of gas to create high pressure, which stretches and elongates the arc swiftly. As the fuse blows, the moving contact loses its tension, unlocking the mechanism and allowing the fuse tube to drop into the open position. For load management, operators utilize an insulating rod to disengage the moving contact. Initially, the moving and static contacts remain engaged, but continued pulling with the insulating rod separates the auxiliary contacts. An arc develops between these auxiliary contacts and elongates within the hood slit, with the arc extinguishing as the current reaches zero, facilitated by the gas within the arc cover.
Use and Standards
Our product shines in 10 ~ 35KV distribution lines, branching lines, and primary sides of distribution transformers. It is designed for exceptional overload and short-circuit protection while adeptly handling the separation and combination of the rated load current.
Our product model adheres to the esteemed JB/T8321-1996 standard for AC high-voltage fuses, with product parameters aligned with GB15166.3-1994 standards for high-voltage expulsion fuses. Where standards lack specificity in critical parameters and configurations, we refine our offerings based on JB/DQ2139-1986's interim technology for 10 ~ 35KV outdoor high voltage drop fuses.
The drop-out fuse cutout and load switching fuse cutout stand as stalwart outdoor high-voltage protection devices. They connect seamlessly with the incoming feeder of distribution transformers or lines, safeguarding transformers and lines from short circuits and overloads while managing on/off load currents. These cutouts are engineered with insulating insulator supports and fuse tubes. Static contacts secure both sides of the support, while moving contacts are affixed to the fuse tube ends. The fuse tube features an inner arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube. For enhanced load management, the load switching fuse cutout is equipped with elastic auxiliary contacts and an arc-extinguishing enclosure to masterfully switch on-off loading currents.
In standard operations, the fuse tube is tightly secured in the closed position via the fuse link. When faults arise, the fault current rapidly melts the fuse, producing an electric arc. This ignites the arc-extinguishing tube, releasing gas that generates high pressure to blow along the tube. Once the fuse melts, the moving contact loses its tension, triggering a lock mechanism, and the fuse tube drops to open the cutout. For load switching, operators employ an insulating operating bar to disengage the moving contact. Initially, the main contact and auxiliary static contact remain connected, but further pulling separates the auxiliary contact. The resulting electrical arc elongates within the arc-extinguishing enclosure gap, with gas expelling and extinguishing the arc as 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. stands as a beacon of innovation and expertise, a high-tech enterprise dedicated to the nuances of electrical integration. Boasting a sterling professional R&D, production, and service team, we proudly bring over 15 years of exceptional industry experience to the table, ensuring that we are at the forefront of technological advancements.
We offer an extensive range of exceptional products including cutting-edge high-voltage solid-state soft starters, state-of-the-art capacitor cabinets, versatile high and low voltage switchgear, advanced gas-insulated switchgear, and robust substations. Our products seamlessly integrate into diverse sectors such as energy and chemical industries, the intricate realms of metal smelting, expansive electric power grids, and the dynamic fields of industrial manufacturing. Further, our influence extends to prestigious universities and research institutions, the innovative medical and pharmaceutical sectors, vital municipal commerce, comprehensive water conservancy and hydropower systems, efficient road traffic infrastructures, and bustling commercial and residential areas.
At Zhejiang ChaoTai, we embrace the spirit of technological innovation, anchored in the philosophy of 'smart manufacturing.' Our journey is defined by the strategic recruitment of high-level technical talents, ensuring our core competitiveness remains unmatched. We are dedicated to delivering unparalleled value to our customers while striving to establish the industry’s most distinguished brand. Since inception, our company has made remarkable strides, transforming from humble beginnings to industry excellence. Our sustained commitment to innovation follows a strategic business model focused on quality-driven survival, market adaptation, reputation-enhanced development, and management-driven efficiency. Our guiding principles espouse 'technology as the guide, standardized management, superior quality, and customer satisfaction.' Through these, we enhance our competitive edge in the market, setting ambitious goals to accelerate, strengthen, and elevate China's electric power and grid sectors. Integrity forms our foundation, quality is our cornerstone, service is our commitment, and customer satisfaction is our infinite pursuit. Our aspirations are anchored in relentless excellence and perpetual innovation, with a vision to build a brand our customers can trust. Your recognition fuels our ambition, and we heartily thank our valued new and old customers for their unwavering support and trust. Zhejiang ChaoTai stands poised to collaborate with you, hand in hand, to forge a future of shared success and prosperity.
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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