Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are essential outdoor high-voltage protection devices tailored for electrical safety. These fuses are strategically installed on the high-voltage side of distribution transformers or serve as the Support Link in distribution lines. They are crucial for shielding transformers and lines against short circuits, overloads, and for managing open and co-load currents effectively. Constructed with an insulating bracket and fuse tubes, the drop-out fuse features static contacts affixed at both ends of the insulation bracket and moving contacts on both ends of the fuse tube. The innovative design of the fuse tube includes an inner arc tube and an outer phenolic paper tube or epoxy glass cloth tube. The load drop-out fuse is further enhanced with flexible auxiliary contacts and an arc chute, improving its performance in managing open and co-load currents.
During normal operations, the drop-out fuse maintains a closed position thanks to the tension in the fuse tube. However, in the event of a system failure, the fault current promptly melts the fuse, creating an arc. This arc ignites the arc tube, leading to the decomposition of large gas volumes, creating high pressure within the tube, and generating a vertical wind along the pipeline. This swiftly stretches and elongates the arc. Post-fuse blow, the moving contact releases tension, disengaging the locking mechanism, dropping the fuse tube, and forming an open position. When pulling the load, the insulating rod is used to maneuver the moving contact. Initially, the moving and static contacts remain connected, but continued pulling separates the auxiliary contacts. This separation generates an arc between them, which stretches within the hood slit. The arc cover, filled with gas, extinguishes the arc as the current reaches zero.
Use and Standards
This sophisticated product is specifically designed for use in 10 ~ 35KV distribution lines branching lines and the primary side of distribution transformers. It is adept at providing overload and short circuit protection while efficiently managing the separation and combination of the rated load current.
The product model adheres to JB/T8321-1996, a standard for type AC high-voltage fuses. Additionally, product parameters align with GB15166.3-1994 standards for high voltage fuses and expulsion fuses. Although certain parameters and configurations are not explicitly defined, corrections are made according to JB/DQ2139-1986, which outlines interim technology requirements for 10 ~ 35KV outdoor high voltage drop fuses.
Drop-out Fuse Cutouts and Load Switching Fuse Cutouts are premium outdoor high voltage protective devices. They seamlessly integrate with the incoming feeder of distribution transformers or lines, providing robust protection against short circuits, overloads, and enabling efficient on/off loading current management. Each cutout features insulate insulator supports and a fuse tube, with static contacts fixed on both sides of the insulator support, and moving contacts situated on the ends of the fuse tube. The fuse tube is ingeniously crafted with an inner arc-extinguishing tube and an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is further enhanced with resilient auxiliary contacts and an arc-extinguishing enclosure that masterfully manages on-off loading currents.
Under normal working conditions, the fuse link tightly secures the fuse tube in a closed position. When a fault occurs, the fault current causes the fuse to melt quickly, generating an electric arc. This action heats the arc-extinguishing tube, releasing a significant amount of gas, which further produces high pressure and propels the arc along the tube. Once the fuse link melts, the moving contact loses its tension, unlocking the mechanism and allowing the fuse tube to drop out, thereby transitioning to an open position. When it's necessary to switch off during cutout loading, the operator uses an insulating operating bar to pull the moving contact. Initially, the main and auxiliary static contacts remain connected, but further pulling separates the auxiliary contacts, resulting in an electric arc. This arc stretches within the arc-extinguishing enclosure gap, and the arc-extinguishing process releases gas 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 distinguished high-tech enterprise deeply entrenched in the realm of electrical integration. Our esteemed organization boasts a dedicated R&D, production, and service team, enriched with over 15 years of industry expertise.
Our illustrious product line encompasses high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, gas-insulated switchgear, and substations. These exceptional products have found widespread applications across diverse fields including energy and chemical industries, metal smelting, electric power grids, industrial manufacturing, universities and research institutions, medical and pharmaceutical sectors, municipal commerce, water conservancy, hydropower, road traffic, as well as commercial and residential areas.
Our unwavering commitment to technological innovation and the philosophy of 'smart manufacturing' propels us to introduce high-caliber technical talent, meticulously enhancing our company's core competitiveness. We are unwavering in our mission to deliver unparalleled services while aspiring to forge the foremost brand in the industry. Since inception, our journey has been marked by remarkable progress—from humble beginnings to excellence. Our steadfast dedication to innovation anchors our modern business trajectory, ensuring survival through superior quality, market-driven strategies, development through reputation, and optimized efficiency from astute management. We are resolute in our pledge to 'technology as the guide, standardized management, excellent quality, and customer satisfaction' in our quality and technical talent management. This drives our ambition to fortify market competitiveness, serving China's electric power and grid transmission and distribution domains with unmatched speed, strength, and aspirational targets. Integrity is our foundation, quality our hallmark, service our priority, and customer satisfaction our eternal pledge. Our relentless pursuit of excellence, continuous innovation, and the creation of a trustworthy brand are steadfast goals. Your acknowledgment fuels our passion. We express heartfelt gratitude to our new and long-standing customers for their unwavering support and affinity. Senhang Technology eagerly anticipates collaborating 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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