Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are pivotal solutions for safeguarding outdoor high-voltage electrical systems. These devices are ingeniously designed to be strategically positioned on the high-voltage side of distribution transformers or as integral connections within distribution lines. They play a vital role in offering protection against transformer and line short circuits, overload conditions, and facilitate the initiation and co-loading of current. Crafted with precision, the drop-out fuse integrates an insulating bracket and fuse tubes, with static contacts securely affixed at the bracket's ends and moving contacts at the fuse tube's ends. The fuse tube is constructed with an inner arc tube and an outer layer made from phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse presents enhanced versatility with auxiliary contacts and an arc chute, meticulously engineered for smooth current load operations.
In standard operational scenarios, the drop-out fuse is firmly held in a closed position, with the fuse tube tensioned for maximum reliability. When a system malfunction arises, the fault current promptly blows the fuse, creating an arc. This arc ignites the arc tube, leading to the decomposition of a large volume of gas, producing high pressure within the tube and generating a powerful vertical wind path. This efficient mechanism swiftly stretches and elongates the arc. Following the fuse blowout, the moving contact releases its tension and rotates outward, while the locking mechanism disengages to allow the fuse tube to drop and reach a breaking position. For load pulling, an insulating rod is utilized to draw the moving contact, which keeps in touch with the static contact. The continued application of force causes the auxiliary contacts to separate, forming an arc that stretches within the protective hood slit. The arc cover, containing gas, assists in extinguishing the arc as the current approaches zero.
Use and Standards
This exceptional product is expertly tailored for applications in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It delivers robust protection against overloads and short circuits while allowing efficient separation and recombination of the rated load current.
The painstaking design of this product follows the JB/T8321-1996 Method for AC high-voltage fuse preparation, while its parameters are aligned with the GB15166.3-1994 high voltage fuses Expulsion fuses standards. In scenarios where the standards do not specify detailed definitions of key parameters and configurations, adaptations are 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 superior outdoor high-voltage protective devices. Engineered to connect with the incoming feeder of distribution transformers or lines, they are integral in protecting transformers and lines from short circuit events and overload conditions while managing on/off load current. The drop-out fuse cutout comprises insulating insulator supports and a fuse tube, with static contacts securely installed on both sides of the insulator support and moving contacts at the fuse tube's ends. The fuse tube includes an internal arc-extinguishing tube with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also incorporates robust elastic auxiliary contacts and an arc-extinguishing enclosure for proficient on-off load current switching.
Under normal operational conditions, the fuse link ensures the fuse tube remains taut in a closed position. When a fault arises, the fault current swiftly melts the fuse, creating an electric arc. This heat causes the arc-extinguishing tube to release a considerable volume of gas, generating high pressure and elongating the arc throughout the tube. Once the fuse link melts, the moving contact loses tension, allowing the mechanism to unlock and the fuse tube to drop out, switching to an open position. During load switching cutout, operators 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 extended, an electric arc forms between the auxiliary contacts, stretching within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism expels 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. stands as a beacon of forward-thinking innovation and superior quality in the field of electrical integration. As a cutting-edge high-tech enterprise, we proudly present a deeply experienced R&D, production, and service team, fortified by over 15 years of unwavering dedication to industry excellence.
Our diverse and comprehensive product range includes top-tier high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and resilient substations. These high-caliber products are pivotal across numerous sectors, serving the energy and chemical industries, metal smelting, expansive electric power grids, industrial manufacturing, and prominent universities and research institutions. Moreover, our solutions significantly enhance the medical and pharmaceutical fields, support robust municipal commerce, advance water conservancy and hydropower projects, refine road traffic systems, and elevate both commercial and residential projects.
Anchored in an unwavering commitment to technological advancement and the ethos of 'smart manufacturing,' we tirelessly attract elite technical talent to holistically augment our core competitive strengths. We are passionately committed to delivering extraordinary value to our clientele and are on a resolute mission to establish the most revered brand within our industry. Since our establishment, we have persistently progressed, charting a course from our beginnings to outstanding achievement. Our journey is marked by a dedication to innovation, underpinned by a contemporary business ethos that champions quality as our cornerstone, market responsiveness, reputation-driven growth, and management-enhanced efficiency. We resolutely adhere to the principles of 'technology as the guide, standardized management, outstanding quality, and customer satisfaction' in our quality and technical talent management, diligently striving to amplify our market footprint. Our mission is to serve China's electric power and grid transmission and distribution sectors with increasing velocity, vigor, and vision. At our foundation, integrity is immutable, quality is inviolable, service is paramount, and customer satisfaction is our perpetual tenet. Our steadfast pursuit of excellence, unyielding innovation, and commitment to fostering a trusted brand are our guiding stars. Your acknowledgment propels our advancement. We are profoundly grateful to all our steadfast clients for their lasting support, and Senhang Technology looks forward to partnering with you in crafting 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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