Product Description
General
The Drop-out Fuse and Load Drop-out Fuse serve as robust outdoor high-voltage protective devices essential for electrical distribution systems. Positioned strategically on the high-voltage side of distribution transformers or as pivotal components in distribution lines, these fuses safeguard against transformer and line short circuits, overloads, and facilitate current management. Constructed with a resilient insulating bracket and durable fuse tubes, they feature static contacts affixed to both ends of the insulation bracket and moving contacts at the fuse tube's extremities. The inner arc tube of the fuse tube combines with an outer layer made from phenolic paper or epoxy glass cloth to ensure optimal performance. The Pull Load Drop-out Fuse introduces enhanced flexibility with auxiliary contacts and an arc chute, ensuring efficient current management.
In standard operational circumstances, the Drop-out Fuse maintains a closed position as the fuse tube remains under tension. However, when a system malfunction occurs, the fault current swiftly triggers the fuse to blow, generating an arc. This leads to the arc tube being ignited by the electric arc, which subsequently decomposes into large volumes of gas. This process creates substantial pressure within the tube, propelling the arc in an elongating trajectory. Once the fuse blows, the moving contact loses its tension, causing the locking mechanism to release the fuse tube, which subsequently drops into a breaking position. During load operations, an insulating rod pulls the moving contact. Initially, the moving and static contacts remain engaged. With continued pulling using the insulating rod, the auxiliary contacts separate, and an arc forms between them. This arc stretches through the hood slit, with the arc cover releasing gas. As the current reaches zero, the arc is extinguished.
Use and Standards
This innovative product is specifically crafted for deployment in 10 to 35KV distribution lines and the primary side of distribution transformers, offering unrivaled protection against overloads and short circuits. It is adept at facilitating the separation and combination of rated load currents.
This product's model is meticulously prepared according to JB/T8321-1996 standards for type AC high-voltage fuses. The product parameters adhere to GB15166.3-1994 standards for high voltage expulsion fuses. Although the standards lack explicit definitions for certain critical parameters and configurations, adjustments are made based on JB/DQ2139-1986 requirements for 10 to 35KV outdoor high voltage drop fuses.
Drop-out Fuse Cutouts and Load Switching Fuse Cutouts are designed as advanced outdoor high-voltage protective devices. They serve as vital components connecting the incoming feeder of distribution transformers or lines, primarily to shield them from short circuits and overloads, while also enabling efficient on/off current management. Comprising insulate supports and a fuse tube, these devices feature static contacts fixed on the insulator support's sides, while moving contacts are affixed to the fuse tube's ends. The fuse tube is composed of an inner arc-extinguishing tube paired with an outer layer made from robust phenolic compound paper or epoxy glass tube. The Load Switching Fuse Cutout is designed with reinforced elastic auxiliary contacts and an arc-extinguishing enclosure to ensure seamless on-off current management.
Under normal working conditions, the fuse link secures the fuse tube in a closed position. During fault events, the resulting fault current promptly melts the fuse, generating an electric arc. This causes the arc-extinguishing tube to heat up, releasing a significant amount of gas. The pressure created propels the arc through the tube. Once the fuse link melts, the moving contact loses its tension, triggering the locking mechanism and allowing the fuse tube to drop out, thus transitioning the cutout to an open position. For cutout load switching, operators use an insulating bar to pull the moving contact. Initially, the main and auxiliary static contacts remain engaged. As the auxiliary contact is pulled apart, an electric arc forms and elongates within the arc-extinguishing enclosure's gap. Simultaneously, gas is expelled to extinguish the arc as the current crosses 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. epitomizes innovation as a high-tech enterprise dedicated to electrical integration. With a distinguished R&D, production, and service team boasting over 15 years of industry expertise, we are a formidable force advancing the future of technology.
Our esteemed product lineup includes high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, gas-insulated switchgear, and substations. These cutting-edge solutions are integral to a multitude of sectors: from energy and chemical industries to metal smelting, electric power grids, industrial manufacturing, and extending their reach to universities, research institutions, medical and pharmaceutical sectors, municipal commerce, water conservancy and hydropower, road traffic, and diverse commercial and residential areas.
Driven by the spirit of technological innovation and a commitment to 'smart manufacturing,' we are steadfast in our mission to enrich our core competencies by attracting top-tier technical talents. Our aim is to elevate our brand to the pinnacle of the industry, providing unparalleled value to our customers. Since inception, our journey has been one of remarkable transformation—from inception to excellence. We champion innovation and uphold a contemporary business ethos of thriving through quality, adopting a market-driven approach, fostering growth through a stellar reputation, and optimizing efficiency through superior management. Our guiding principles—'technology as the guide, standardized management, excellent quality, and customer satisfaction'—fortify our competitive edge in the marketplace. We aspire to serve China's electric power and grid sectors with unprecedented speed, strength, and ambition. Our foundation rests on integrity; our priority, quality; our commitment, exceptional service; our promise, unwavering customer satisfaction. Our unwavering pursuit of excellence and relentless innovation underpins our quest to forge a brand synonymous with trust. Your recognition propels us forward. We extend our heartfelt gratitude to all our valued clients, old and new, for their steadfast support and affinity. Zhejiang Chaotai Complete Equipment Co., Ltd. eagerly anticipates forging enduring partnerships as we collaboratively shape a brighter future.
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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