Product Description
General
Crafted for excellence, our Drop-out Fuse and Pull Load Drop-out Fuse are the pinnacle of outdoor high-voltage protection for electrical systems. Perfectly designed to be installed on the high-voltage side of distribution transformers or the pivotal support link of a distribution line, these fuses ensure superior protection against transformer and line short circuits, overloads, and manage co-load currents effectively. Constructed with an insulating bracket and a robust fuse tube, the static contacts are strategically positioned at both ends of the insulation bracket, while the moving contacts are expertly installed on the fuse tube ends. The fuse tube itself is a marvel, composed of an inner arc tube coupled with an outer phenolic paper tube or a resilient epoxy glass cloth tube. The Pull Load Drop-out Fuse is engineered to enhance operational flexibility with its auxiliary contacts and an arc chute, ensuring optimal performance in handling co-load currents.
During standard operation, the fuse tube remains tensioned, maintaining a closed position. However, when the system encounters a fault, the fault current promptly blows the fuse, generating an arc. The arc tube, heated by the electric arc, decomposes into a substantial amount of gas, creating high pressure within the tube that swiftly extends and elongates the arc vertically. Once the fuse blows, the moving contact loses its tension and pivots out, triggering the locking mechanism to release the fuse tube, leading to the fuse tube dropping and establishing a breaking position. For load disconnection, an insulating rod is used to manipulate the moving contact. Initially, the moving and static contacts remain engaged; continued manipulation with the insulating rod separates the auxiliary contacts. An arc forms between these auxiliary contacts and is stretched within the hood slit, while gas in the arc cover extinguishes the arc when the current reaches zero.
Use and Standards
Engineered for precision and reliability, this product is essential for 10 ~ 35KV distribution line branching and primary side protection of distribution transformers. It excels at providing overload and short circuit protection, seamlessly managing the separation and combination of rated load currents.
Our product models are meticulously prepared in accordance with the JB/T8321-1996 Method of type AC high-voltage fuses. All product parameters adhere to the GB15166.3-1994 high-voltage fuses expulsion fuses standards. In cases where standards lack explicit definitions for key parameters and configurations, we refer to the JB/DQ2139-1986 interim technical requirements for 10 ~ 35KV outdoor high-voltage drop fuses to ensure precise corrections and compliance.
Drop-out fuse cutouts and load switching fuse cutouts are premier outdoor high voltage protective devices. Designed to seamlessly integrate with the incoming feeders of distribution transformers or lines, they provide unparalleled protection against short circuits, overloads, and effectively manage on/off loading currents. Composed of insulator supports and a durable fuse tube, static contacts are firmly fixed on the insulator support sides, while moving contacts are expertly fitted to the fuse tube ends. The fuse tube boasts an internal arc-extinguishing tube and an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout features enhanced elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring reliable switching of on-off loading currents.
In regular operation, a tightened fuse link secures the fuse tube in a closed position. Should a fault occur, the fault current instantly melts the fuse, creating an arc that heats the arc-extinguishing tube and releases a significant amount of gas. This generates high pressure, resulting in the stretching and elongation of the arc within the tube. Post fuse link melting, the moving contact loses its tension, triggering the locking mechanism, and the fuse tube drops, indicating an open position. For cutout loading disconnection, an insulating operating bar is used to pull the moving contact. Initially, the main contact remains in contact with the auxiliary static contact. Continued pulling separates the auxiliary contact, creating an arc between the auxiliary contacts. The arc is lengthened within the arc-extinguishing enclosure gap, and the arc-extinguishing gas is released to extinguish the arc 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. is a pioneering high-tech enterprise that excels in the realm of electrical integration. Boasting a seasoned team of R&D professionals, production experts, and service specialists, the company shines with over 15 years of unparalleled industry experience, continually setting the benchmark for innovation and excellence.
Our diverse array of superior products encompasses high-voltage solid-state soft starters, state-of-the-art capacitor cabinets, advanced high and low voltage switchgear, innovative gas-insulated switchgear, and robust substations. These cutting-edge solutions have become indispensable across a multitude of sectors, including energy and chemical industries, metal smelting, electric power grids, industrial manufacturing, academic institutions, the medical and pharmaceutical arenas, municipal and commercial enterprises, water conservancy and hydropower projects, road traffic systems, and both commercial and residential infrastructures.
Rooted in a steadfast commitment to technological innovation and embodying the philosophy of 'smart manufacturing,' we are resolutely dedicated to propelling the company’s core competitiveness to new heights by recruiting top-tier technical talent. Our passion for delivering unparalleled value to our customers and ambition to forge the finest brand in the industry is unwavering. Since inception, we have embarked on a remarkable journey of transformation, consistently advancing from inception to excellence. Our unwavering allegiance to innovation is reflected in our modern business ethos, emphasizing survival through quality, a market-centric approach, growth anchored in reputation, and efficiency derived from exemplary management practices. We pledge to guide our endeavors with technology, uphold standardized management, ensure impeccable quality, and secure customer satisfaction in our pursuit of enhanced market competitiveness. Our mission is to serve China's electric power transmission and distribution sectors with unmatched speed, strength, and ambition. Integrity is our cornerstone, quality our hallmark, service our crown jewel, and customer satisfaction our perpetual pursuit. We are relentless in our quest for excellence, committed to continuous innovation, and steadfast in constructing a brand that commands trust. Your esteem fuels our journey. We extend our heartfelt gratitude to all esteemed customers, past and present, for their unwavering support and loyalty. Zhejiang Chaotai Complete Equipment Co., Ltd. eagerly anticipates nurturing a collaborative partnership with you to sculpt 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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