Product Description
General
The drop-out fuse and pull-load drop-out fuse are essential outdoor high-voltage protective devices. These fuses are strategically installed on the high-voltage side of distribution transformers or within the pivotal support link of distribution networks. They serve as vital guardians, providing protection against short circuits and overload, while also enabling circuits to open and close with co-load current. Crafted with precision, the drop-out fuse consists of an insulating bracket and a robust fuse tube. At the ends of this bracket are static contacts, while the dynamic moving contacts are housed at the extremities of the fuse tube. The fuse tube itself is engineered with an inner arc tube paired with an outer layer of phenolic paper or epoxy glass cloth, ensuring superior durability. For added flexibility, the pull-load drop-out fuse features enhanced auxiliary contacts and an arc chute, efficiently managing the co-load current operations.
In normal operations, the drop-out fuse maintains a closed position, secured firmly by the tension within the fuse tube. Upon a system failure, the fault current rapidly blows the fuse, igniting an arc. This arc heats the arc tube, which then releases copious amounts of gas, creating high pressure within the tube. This phenomenon generates a vertical wind that swiftly stretches and elongates the arc. Once the fuse is blown, the tension is released, causing the moving contact to retract and engage a locking mechanism, thereby dropping the fuse tube and establishing a breaking position. During load operations, an insulating rod is used to manipulate the moving contact. As the rod is pulled, the main and static contacts initially remain engaged. Continued pulling separates the auxiliary contacts, creating an arc stretched within the hood slit. The arc cover, filled with gas, extinguishes the arc when the current reaches zero.
Use and Standards
This innovative product is expertly designed for use within 10 ~ 35KV distribution line branches and on the primary side of distribution transformers. It provides unparalleled protection against overloads and short circuits, offering seamless separation and combination of the rated load current.
The product model adheres to JB/T8321-1996 standards for type AC high-voltage fuses. Parameters are crafted in accordance with GB15166.3-1994 for high voltage expulsion fuses. While these standards outline key parameters and configurations, any undefined specifics are adapted following JB/DQ2139-1986 for 10 ~ 35KV outdoor high voltage drop fuses, ensuring technological accuracy and compliance with interim requirements.
Drop-out fuse cutouts and load-switching fuse cutouts stand as robust outdoor high-voltage protective devices. These are seamlessly connected to the incoming feeder of a distribution transformer or line, mainly to shield against short circuits and overloads while facilitating on/off load operations. The drop-out fuse cutout is meticulously constructed from insulated support structures combined with a durable fuse tube. Static contacts are securely fixed on either side of the insulator support, while the moving contacts are skillfully integrated at both ends of the fuse tube. This tube comprises an internal arc-extinguishing tube, encased in an outer layer of phenolic compound paper or epoxy glass. The load-switching fuse cutout is enhanced with enforced elastic auxiliary contacts and a specialized arc-extinguishing enclosure, expertly handling on-off load currents.
During standard operation, the fuse link ensures the fuse tube is fixedly secured, forming a closed position. In the event of a system fault, the fault current causes the fuse to melt instantaneously, generating an electric arc. This arc heats the arc-extinguishing tube, releasing a surge of gas that produces high pressure, blowing along the tube. As the fuse link melts, the moving contact loses its tension, initiating the locking mechanism and causing the fuse tube to drop, thereby opening the cutout. When switching off during loading, an operator uses an insulating bar to pull the moving contact. Initially, the main and auxiliary static contacts remain connected. As the pulling continues, the auxiliary contacts separate, and an electric arc forms, stretching within the arc-extinguishing enclosure gap. This enclosure releases gas to extinguish the arc as the current drops to 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 high-tech innovation within the realm of electrical integration. Our enterprise is bolstered by an exceptional R&D, production, and service team, bringing over 15 years of rich, industry-specific experience to the table.
Our diverse portfolio includes high-voltage solid-state soft starters, capacitor cabinets, sophisticated high and low voltage switchgear, highly efficient gas-insulated switchgear, and robust substations. These cutting-edge products are seamlessly integrated across a myriad of sectors including energy and chemical industries, metal smelting, electric power grids, industrial manufacturing, academic institutions, medical and pharmaceutical fields, municipal commerce, water conservancy and hydropower projects, road traffic systems, as well as bustling commercial and residential zones.
At the core of Zhejiang Chaotai Complete Equipment Co., Ltd. is an unwavering commitment to technological innovation, driving us towards a pioneering 'smart manufacturing' ethos. Our strategy includes actively recruiting top-tier technical talent to significantly bolster our competitive edge while delivering unparalleled value to our esteemed clientele. From our inception, we have transformed from a nascent entity to an industry leader of excellence, underscored by a relentless pursuit of innovation. By adhering to the tenets of quality-driven survival, market-centric growth, development through robust reputation, and management-led efficiency, we maintain our competitive stance. Our commitment to guiding technology, standardized management practices, superior quality, and unwavering customer satisfaction forms the backbone of our operational philosophy. We tirelessly enhance our market competitiveness, striving to elevate China's power transmission and distribution sectors with accelerated innovation. Integrity, quality, and service excellence are our guiding principles, with customer satisfaction being our everlasting tenet. As we continuously reach for excellence and drive innovation, we remain dedicated to establishing a brand you can trust. Your continued support fuels our journey forward, and we extend heartfelt gratitude to both new and longstanding customers. Zhejiang Chaotai Complete Equipment Co., Ltd. eagerly anticipates forging a prosperous future together with you.
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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