Product Description
General
Our premium drop-out fuse and pull load drop-out fuse are quintessential outdoor high-voltage electrical protection solutions. These fuses are designed to be installed on the high-voltage side of distribution transformers or as crucial support links on distribution lines, providing robust protection against transformer and line short circuits and overloads. The innovative design comprises an insulating bracket coupled with fuse tubes, with static contacts affixed to both ends of the insulation bracket and moving contacts installed at either end of the fuse tube. The cutting-edge fuse tube itself is ingeniously crafted from an inner arc tube and an outer casing made of either phenolic paper or epoxy glass cloth, ensuring heightened durability. Our pull load drop-out fuse boasts reinforced flexibility through auxiliary contacts and an arc chute designed to efficiently manage open and co-load current scenarios.
In normal operations, the fuse tube is securely held in a closed position by the tension of the fuse. In the event of a system malfunction, the fault current swiftly blows the fuse, resulting in arc formation. The arc ignites the arc tube, causing a decomposition of gases and creating a high-pressure environment within the tube. This pressure generates a strong vertical wind along the pipeline, effectively stretching and elongating the arc for rapid extinguishment. Once the fuse is blown, the moving contact loses its tension, unlocking the mechanism and releasing the fuse tube to drop, achieving a breaking position. For load pulling, an insulating rod is utilized to manipulate the moving contact. Initially, the moving and static contacts remain interconnected, but as the insulating rod extends the contact, the auxiliary contacts disengage. This disengagement generates an arc between the auxiliary contacts, which is then elongated within the hood slit. The arc enclosure contains gas which, upon reaching a zero current state, efficiently extinguishes the arc.
Use and Standards
This advanced product is expertly designed for use on 10 ~ 35KV distribution lines and branching lines, as well as the primary side of distribution transformers. It provides unparalleled protection against overloads and short circuits, while efficiently handling the separation and combination of the rated load current.
Our product adheres to the JB/T8321-1996 methodology for type AC high-voltage fuses, with product parameters meticulously crafted according to the GB15166.3-1994 standards for high voltage expulsion fuses. In instances where these standards do not explicitly define crucial parameters and configurations, corrections are applied based on the JB/DQ2139-198610 ~ 35KV outdoor high voltage drop fuse interim technology requirements, ensuring consistent excellence.
The drop-out fuse cutout and load-switching fuse cutout are high-performance outdoor devices designed for high voltage protection. When connected to the incoming feeder of a distribution transformer or distribution lines, these devices play a vital role in shielding transformers and lines from short circuits and overloads, while also managing on/off loading currents. The drop-out fuse cutout is ingeniously composed of insulating supports and a fuse tube, with static contacts securely positioned on either side of the insulating support and moving contacts seamlessly integrated at each end of the fuse tube. The fuse tube features a sophisticated design with an internal arc-extinguishing tube and an external casing made from phenolic compound paper or epoxy glass, while the load-switching fuse cutout includes reinforced elastic auxiliary contacts and a specialized arc-extinguishing enclosure for efficient on-off load current handling.
Under standard operational conditions, the fuse link keeps the fuse tube in a closed and secure position. Should a system fault occur, the fault current causes the fuse to melt instantly, generating an electric arc that heats the arc-extinguishing tube, releasing an explosive amount of gas. This action builds high pressure, causing the arc to blow along the tube. Once the fuse link melts, the moving contact loses its tension, activating the locking mechanism which results in the fuse tube dropping out, transitioning the cutout to an open position. For switching off during cutout loading, operators use an insulating operating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but as pulling continues, the auxiliary contact separates, an electric arc forms, and the arc extends within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing gas expels the arc as the current reaches zero, ensuring seamless and safe operation.
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 specializing in the domain of electrical integration. With a seasoned team dedicated to Research & Development, production, and customer service, we proudly harness over 15 years of rich industry expertise.
Our distinguished product line encompasses high-voltage solid-state soft starters, advanced capacitor cabinets, sophisticated high and low voltage switchgear, cutting-edge gas-insulated switchgear, and comprehensive substations. These exceptional products are actively utilized across diverse sectors including energy and chemical industries, metal smelting, electric power grids, industrial manufacturing, esteemed universities and research institutions, as well as the medical and pharmaceutical arenas. Furthermore, our innovations extend to municipal commerce, water conservancy and hydropower projects, road traffic systems, and both commercial and residential developments.
Firmly rooted in technological innovation and driven by a 'smart manufacturing' ethos, we are fervently bringing on board top-tier technical talent to robustly enhance our core competencies. Our commitment is to deliver unparalleled value to our esteemed clientele while aspiring to forge the most lauded brand in our industry. Since our inception, we have achieved remarkable progress, evolving from inception to excellence. We prioritize innovation, adhering steadfastly to a modern business ideology of quality-driven survival, market-centric growth, reputation-fueled development, and management-led efficiency. Guided by the principles of 'technology as the beacon, standardized management, superior quality, and unwavering customer satisfaction,' we aim to elevate our market stature and cater to the transmission and distribution sectors of China's electric power and grid with unmatched speed, strength, and ambition. Our foundation is integrity, our priority is quality, our hallmark is service excellence, and our ultimate pursuit is customer satisfaction. Striving for excellence, relentless innovation, and building a brand synonymous with trust remain our steadfast aspirations. Your recognition fuels our pursuit of excellence. We express our heartfelt gratitude to all our valued clients, both new and longstanding, for your unwavering support and loyalty. Zhejiang Chaotai Complete Equipment Co., Ltd. eagerly anticipates collaborating with you to craft 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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