Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are indispensable outdoor high-voltage protection devices for electrical systems. Installed on the high-voltage side of distribution transformers or as a support link on distribution lines, they provide robust protection against short circuits and overloads, facilitating open and co-load current operations. The design consists of a durable insulating bracket and fuse tubes, with static contacts mounted at both ends of the bracket and moving contacts affixed to the ends of the fuse tube. The fuse tube combines an inner arc tube with an outer phenolic paper or epoxy glass cloth tube. For enhanced operational flexibility, the Pull Load Drop-out Fuse is equipped with auxiliary contacts and an arc chute, ensuring seamless open and co-load current handling.
Under normal operating conditions, the fuse tube forms a secure closed position with the fuse under tension. In the event of a system fault, the fault current swiftly blows the fuse, generating an arc. This arc ignites the arc tube, leading to the decomposition of large gas volumes, creating high pressure within the tube and initiating vertical wind along the pipeline. The arc is rapidly stretched and elongated. Post-blowing, the moving contact loses tension and is released, triggering the locking mechanism to free the fuse tube, which then drops to form a breaking position. For load pulling, the use of an insulating rod allows for the moving contact to be disengaged. Initially, the moving and static contacts remain connected; however, continued pulling separates the auxiliary contacts, producing an arc that stretches in the hood slit. As the arc cover contains gas, the arc is extinguished once the current reaches zero.
Use and Standards
This superior product is engineered for use in 10 to 35KV distribution lines, branch lines, and the primary side of distribution transformers, delivering reliable overload and short circuit protection. It efficiently facilitates the separation and combination of rated load current.
The product model adheres to JB/T8321-1996, a method for preparing type AC high-voltage fuses. Its parameters comply with GB15166.3-1994 standards for high voltage expulsion fuses. When important parameters and configurations are not explicitly defined, adjustments are made in accordance with JB/DQ2139-1986, which outlines interim technology requirements for 10 to 35KV outdoor high voltage drop fuses.
As outdoor high voltage protective devices, Drop-out Fuse Cutouts and Load Switching Fuse Cutouts are crucial for connecting to incoming feeders of distribution transformers or distribution lines. They are pivotal in protecting transformers and lines from short circuits and overloads, as well as managing on/off loading current. Comprised of insulating insulator supports and fuse tubes, with static contacts securely fixed on both sides of the support and moving contacts on the fuse tube's ends, the structure is robust. The fuse tube features an internal arc-extinguishing tube with an outer phenolic compound paper or epoxy glass tube. The load switching fuse cutout boasts reinforced elastic auxiliary contacts and an arc-extinguishing enclosure for effective switching on and off loading current.
In standard operation, the fuse link is tightened to maintain the fuse tube in a closed position. Upon encountering a system fault, the fault current promptly causes the fuse to melt, producing electric arcs. The arc-extinguishing tube is then heated, releasing a substantial amount of gas, generating high pressure, and propelling the arc along the tube. Following the fuse link's melting, the moving contact loses its tension, triggering the locking mechanism and allowing the fuse tube to drop out, indicating an open position. For cutout loading switching, operators use an insulating operating bar to pull the moving contact. Initially, the main and auxiliary static contacts remain engaged, but continued pulling separates the auxiliary contacts, leading to an arc formation. This arc lengthens within the arc-extinguishing enclosure gap, and the arc-extinguishing gas expels the arc when the current hits zero, ensuring a smooth disconnection.
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 an esteemed high-tech enterprise at the forefront of electrical integration. Our exceptional team of R&D, production, and service professionals boasts over 15 years of rich industry experience, ensuring unparalleled expertise and innovation.
Our diverse array of top-tier products includes high-voltage solid-state soft starters, cutting-edge capacitor cabinets, versatile high and low voltage switchgear, advanced gas-insulated switchgear, and state-of-the-art substations. These products have become integral across numerous crucial sectors such as energy, chemical industries, metal smelting, and electric power grids. Additionally, they serve industrial manufacturing, universities and research institutions, as well as the medical and pharmaceutical industries. Our solutions extend to municipal commerce, water conservancy, hydropower, road traffic, and both commercial and residential areas, underscoring our expansive impact and reliability.
Guided by a commitment to technological advancement and the ethos of 'smart manufacturing,' our company enthusiastically attracts top-tier technical talent, continuously enhancing our core strengths. We dedicate ourselves to delivering unparalleled value to our clients, aspiring to establish the leading brand in our industry. Since inception, we have consistently advanced, transforming from fledgling beginnings to exemplary achievements. Our steadfast adherence to innovation and a progressive business model—prioritizing quality for survival, market orientation for growth, reputation for development, and efficient management for results—sets us apart. In our unwavering commitment to excellence, we uphold 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' as key tenets of our quality and technical talent strategy. By heightening our market competitiveness, we are on a mission to serve China's electric power and grid transmission fields with ever-higher aspirations. Integrity, quality, and service form our core values, with customer satisfaction as our perpetual promise. Striving for excellence, fostering relentless innovation, and building a brand of trustworthiness remain our steadfast goals. Your recognition fuels our journey. We extend heartfelt gratitude to our esteemed clientele, both new and longstanding, for their unwavering support and trust. Senhang Technology eagerly anticipates forging a brighter future with you, hand in hand.
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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