Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are paramount solutions for robust outdoor high-voltage electrical protection. These innovative devices are expertly positioned on the high-voltage side of distribution transformers or as key support elements in distribution lines. They are vital in guarding against transformer and line short circuits, managing overload conditions, and facilitating seamless opening and handling of current. The drop-out fuse is skillfully engineered with an insulating bracket and fuse tubes, featuring static contacts at both ends of the bracket and moving contacts at the ends of the fuse tube. The fuse tube is constructed with an inner arc tube paired with an outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse offers remarkable adaptability with auxiliary contacts and an arc chute, specifically crafted for efficient current load operations.
In standard operations, the drop-out fuse is steadfastly maintained in a closed position with the fuse tube under tension. During system malfunctions, the fault current rapidly blows the fuse, creating an arc that ignites the arc tube. This process results in the decomposition of substantial gas volumes, forming high pressure within the tube and establishing a vertical wind path. This ingenious mechanism efficiently stretches and extends the arc. Once the fuse has blown, the moving contact releases tension and elegantly rotates outward, while the locking mechanism disengages, permitting the fuse tube to drop, achieving a break position. For load pulling, an insulating rod is utilized to disengage the moving contact while maintaining contact with the static contact. With continued effort, the auxiliary contacts separate, an arc forms between them, stretching within the hood slit. The arc cover, containing gas, aids in extinguishing the arc as the current approaches zero.
Use and Standards
This exemplary product is expertly crafted for use in 10 to 35KV distribution lines, including branching lines and on the primary side of distribution transformers. It offers exceptional protection against overloads and short circuits, while enabling seamless separation and combination of the rated load current.
The meticulous design of this product strictly adheres to the JB/T8321-1996 Method for AC high-voltage fuse preparation, with product parameters meeting the GB15166.3-1994 high voltage fuses Expulsion fuses standards. In cases where standards do not define critical parameters and configurations, adjustments are meticulously made in accordance with the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are premier outdoor high-voltage protective devices, designed to connect with the incoming feeder of distribution transformers or lines. They are essential in safeguarding transformers and lines from short circuit incidents and overload conditions, while effectively managing the on/off load current. The drop-out fuse cutout features insulating insulator supports and a fuse tube, with static contacts securely fixed on both sides of the insulator support and moving contacts installed at the ends of the fuse tube. The fuse tube includes an internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is enhanced with enforced elastic auxiliary contacts and an arc-extinguishing enclosure for proficient on-off load current switching.
In typical operational scenarios, the fuse link ensures the fuse tube is firmly tightened to maintain a closed position. Upon encountering faults, the fault current instantaneously melts the fuse, generating a powerful electric arc. This causes the arc-extinguishing tube to heat up and release a considerable amount of gas, creating high pressure that elongates the arc within the tube. After the fuse link melts, the moving contact loses tension, allowing the mechanism to lock and the fuse tube to drop out, transitioning to an open position. For load switching during cutout, operators must utilize an insulating operating bar to pull the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact is further disengaged, an electric arc forms between the auxiliary contacts, elongating within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism expels gas to extinguish the arc as the current approaches 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. shines as a beacon of innovation and exceptional quality in the domain of electrical integration. As a vibrant and cutting-edge high-tech enterprise, we are anchored by a highly skilled R&D, production, and service team, fortified by more than 15 years of steadfast industry expertise.
Our diverse and comprehensive product portfolio includes high-voltage solid-state soft starters, capacitor cabinets, advanced high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and resilient substations. These premium, high-performance products are crucial across a wide array of sectors, such as the energy and chemical industries, metal smelting, expansive electric power grids, and industrial manufacturing. Furthermore, they are indispensable to prominent universities and research institutions. Our sophisticated solutions empower the medical and pharmaceutical realms, bolster municipal commerce, enhance water conservancy and hydropower projects, optimize road traffic systems, and enrich both commercial and residential developments.
With roots firmly planted in unwavering technological innovation and a core philosophy of "smart manufacturing," we are committed to recruiting the best technical talent to comprehensively elevate our company's competitive edge. Our relentless pursuit is to deliver unmatched value to our clients and to craft the most revered brand in the industry. Since our inception, our journey has been one of relentless progress, moving from conception to excellence, guided by innovation and a contemporary business ethos. We prioritize quality as our lifeline, are market-driven, reputation-focused in our development strategies, and achieve efficiency through astute management. We remain steadfast in our guiding principles: "technology as the compass, structured management, exceptional quality, and ultimate customer satisfaction." These tenets underpin our approach to quality and technical talent management, as we diligently enhance our market footprint. Our mission is to serve China's electric power and grid transmission and distribution fields with increasing speed, strength, and ambition. At the heart of our operations, integrity is unwavering, quality is inviolable, service reigns supreme, and customer satisfaction is our unchanging pledge. Our enduring pursuit of excellence, unyielding innovation, and commitment to building a trustworthy brand are our guiding stars. Your recognition propels our progress forward. We extend sincere gratitude to all our loyal clients for their steadfast support, and Senhang Technology is excited to collaborate with you as we strive to create 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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