Product Description
General
A drop-out fuse and a pull load drop-out fuse stand as the stalwarts of outdoor high-voltage electrical protection. Typically deployed on the high-voltage side of a distribution transformer or as a pivotal link in a distribution line, these devices safeguard transformers and lines against short circuits and overloads while facilitating the seamless opening and closing of co-load currents. Constructed with precision, the drop-out fuse features an insulating bracket, with static contacts meticulously installed at each end, and a fuse tube comprising both inner arc and outer protective tubes crafted from phenolic paper or epoxy glass cloth. For those seeking enhanced flexibility, the pull load drop-out fuse elevates performance with auxiliary contacts and an arc chute, ensuring optimal co-load current management.
In standard operation, the drop-out fuse maintains a secure closed position, upheld by the fuse tube's tension. Upon system failure, the fault current swiftly incinerates the fuse, generating an arc within the tube. This arc combusts the inner tube, releasing a burst of gas that propels high pressure within the tube, elongating and extinguishing the arc efficiently. Once the fuse blows, the moving contact loses its tension, initiating the release mechanism and allowing the fuse tube to fall, effectively breaking the circuit. For load management, an insulating rod facilitates the movement of the contact, with initial engagement maintained between moving and static contacts. Further pulling severs the auxiliary contact, introducing an arc that stretches through the hood slit. The gas within the arc cover aids in extinguishing the arc as the current ceases.
Use and Standards
This sophisticated product is tailored for 10 to 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It offers robust overload and short circuit protection while ensuring seamless separation and combination of the rated load current, making it indispensable for modern electrical infrastructures.
Crafted to perfection, the product model adheres to the JB/T8321-1996 Method for AC high-voltage fuses, with parameters meticulously defined by the GB15166.3-1994 standards for expulsion fuses. While these standards may not delineate every parameter explicitly, the product aligns with the rigorous JB/DQ2139-1986 interim technology requirements, ensuring it meets the highest quality benchmarks for 10 to 35KV outdoor high voltage drop fuses.
The drop-out fuse cutout and load switching fuse cutout are integral outdoor high-voltage protective devices. Strategically positioned with incoming feeders of distribution transformers or distribution lines, they play a crucial role in shielding transformers or lines from short circuits and overloads, while adeptly managing on/off load currents. The intricate construction features insulator supports and a fuse tube, with static contacts fixed on either side and moving contacts at both ends of the fuse tube. Crafted from an inner arc-extinguishing tube and an outer phenolic compound paper or epoxy glass tube, the load switching fuse cutout includes robust auxiliary contacts and an arc-extinguishing enclosure for precise load current management.
Under normal conditions, the fuse link secures the fuse tube into a closed position. Should a fault occur, the fault current causes the fuse to melt instantly, leading to an electrical arc. This arc ignites the arc-extinguishing tube, resulting in the release of significant gas pressure that propels the arc along the tube. With the melting of the fuse link, the moving contact loses its tension, triggering the lock mechanism and allowing the fuse tube to drop, transitioning the cutout to an open position. During load switching, the operator uses an insulating bar to manipulate the moving contact. Initially, the main contact and auxiliary static contact remain engaged. As the auxiliary contact is further separated, an arc forms, elongating within the arc-extinguishing enclosure. The gas released aids in extinguishing the arc as the current approaches zero, ensuring safety and functionality.
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 with a dedicated focus on electrical integration. Boasting a highly skilled R&D, production, and service team, we leverage over 15 years of industry expertise to deliver exceptional solutions.
We specialize in a diverse range of cutting-edge products, including high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, gas-insulated switchgear, and advanced substations. Our innovative solutions are pivotal across a spectrum of sectors: from energy and chemical industries, metal smelting, and electric power grids to industrial manufacturing, educational institutions, medical and pharmaceutical fields, as well as municipal commerce, water conservation, hydropower, road traffic management, and both commercial and residential developments.
Rooted in the ethos of 'smart manufacturing,' we are passionately committed to technological innovation. Our strategy involves attracting high-caliber technical talents to fortify our core competitiveness, ensuring we deliver unparalleled value to our clients and shape an industry-leading brand. Since our inception, we've evolved significantly, enhancing our capabilities from foundational beginnings to achieving excellence. Our guiding philosophy underscores innovation while maintaining a rigorous focus on quality for sustainable growth. By adhering to the principles of 'technology as the guide, standardized management, superior quality, and customer satisfaction,' we boost our market prowess and aim to excel in China's electric power and grid sectors. Upholding integrity and prioritizing quality and service as paramount, our perpetual goal is customer satisfaction. We relentlessly pursue excellence, fostering a culture of relentless innovation to build a trustworthy brand. Your trust fuels our progress, and we extend our heartfelt gratitude to all our valued partners for their unwavering support. At Zhejiang ChaoTai, we're excited to collaborate with you to forge a brighter future together.
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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