Product Description
General
The Drop-out Fuse and Load Pull Drop-out Fuse are sophisticated outdoor high-voltage protection solutions. They are strategically installed on the high-voltage side of distribution transformers or linked to distribution lines to safeguard against short circuits and overloads, while facilitating smooth current operations. These fuses consist of a robust insulating bracket and a durable fuse tube, with static contacts secured at each end of the insulation bracket and moving contacts attached to both ends of the fuse tube. The fuse tube is ingeniously crafted from an inner arc tube encased within an outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse is specially designed with enhanced flexibility, featuring auxiliary contacts and an arc chute that ensures seamless open/close current operations.
During normal operation, the drop-out fuse remains in a closed position as the fuse tube maintains tension. When a system fault occurs, the fault current swiftly melts the fuse, generating an arc that ignites the arc tube, producing a large volume of gas and creating high pressure within the tube. This pressure generates a vertical wind along the pipeline, rapidly elongating and extinguishing the arc. Once the fuse melts, the moving contact loses tension, triggering the locking mechanism to release the fuse tube, which drops into an open position. To safely open the circuit, an insulating rod is used to pull the moving contact while maintaining contact with the static contact. As the contact is gradually separated, an arc forms between the auxiliary contacts, extending into the hood slit where the gas in the arc cover extinguishes the arc when the current reaches zero.
Use and Standards
This state-of-the-art product is designed for 10 to 35KV distribution lines and serves as a critical component for the primary side of distribution transformers. It provides robust protection against overloads and short circuits while adeptly handling the separation and combination of rated load currents.
Adhering to JB/T8321-1996 standards for AC high-voltage fuses, this product is engineered with precision according to GB15166.3-1994 standards for high voltage expulsion fuses. While these standards do not explicitly define all parameters and configurations, necessary adjustments are made in compliance with JB/DQ2139-1986 interim technical requirements for 10 to 35KV outdoor high voltage drop fuses.
Drop-out Fuse Cutouts and Load Switching Fuse Cutouts are high-performance outdoor high voltage protective devices. They seamlessly connect with incoming feeders of distribution transformers or distribution lines, offering superior protection against short circuits, overloads, and on/off loading currents. Each cutout comprises insulating insulator supports and a fuse tube, with static contacts securely affixed on either side of the insulator support and moving contacts installed at both ends of the fuse tube. The fuse tube features an advanced inside arc-extinguishing tube, while the outer layer is constructed from a phenolic compound paper tube or an epoxy glass tube. The load switching fuse cutout is meticulously designed with enforced elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring efficient switching of on-off loading currents.
Under normal conditions, the fuse link maintains the fuse tube in a closed position. In the event of a fault, the fault current immediately melts the fuse, generating an electric arc that heats the arc-extinguishing tube, causing it to release a vast amount of gas. This reaction creates high pressure and pushes the arc along the tube. Once the fuse link melts, the moving contact loses its tension, triggering the locking mechanism to release and drop the fuse tube, transitioning the cutout to an open position. For load switching during cutout operations, operators can utilize an insulating bar to pull the moving contact, initially maintaining contact with the auxiliary static contact. As the auxiliary contact separates, an arc is formed, which is lengthened in the arc-extinguishing enclosure gap. The arc is rapidly extinguished as the arc-extinguishing gas effectively blows it out during the zero-current phase.
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
Introducing Zhejiang Chaotai Complete Equipment Co., Ltd., a beacon of innovation in the realm of electrical integration. As a high-tech enterprise, we pride ourselves on our seasoned team of professionals, boasting over 15 years of unparalleled expertise in research and development, production, and service. Our commitment to excellence ensures that we remain at the forefront of the industry.
Our diverse and sophisticated product range features high-voltage solid-state soft starters, capacitor cabinets, and an array of switchgear solutions including both high and low voltage and gas-insulated options, along with state-of-the-art substations. Our cutting-edge solutions find strong applications across various sectors such as energy production, chemical industries, metal smelting, and electric power grids. Additionally, we serve industrial manufacturing, academic and research institutions, medical and pharmaceutical fields, municipal commerce, water conservancy, hydropower projects, road traffic systems, as well as commercial and residential developments.
Driven by a spirit of relentless innovation and the ethos of 'smart manufacturing,' we attract top-tier technical talents to elevate our competitive edge. Our mission is to deliver unparalleled value to our clients, aspiring to establish a preeminent brand in the industry. Since our inception, we have charted an impressive trajectory of growth, rising from humble beginnings to achieving industry excellence. Our guiding principles emphasize quality for survival, reputation for development, and efficiency for management. We are steadfast in our commitment to harness technology as a guiding force, maintaining rigorous standards, ensuring superior quality, and achieving complete customer satisfaction. Our focus is on enhancing market competitiveness and expediting advancements in China's power transmission and distribution sectors with higher objectives. Integrity, supreme quality, and exemplary service form the cornerstone of our philosophy. As we pursue excellence, innovate tirelessly, and build a brand synonymous with trust, your recognition fuels our journey. We extend heartfelt gratitude to all our esteemed customers for their unwavering support. Zhejiang Chaotai eagerly anticipates collaborating with you to shape a prosperous 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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