Product Description
General
The drop-out fuse, complete with its impressive load drop-out functionality, stands as an essential component for outdoor high-voltage electrical protection. Designed for installation on the high-voltage side of distribution transformers or as a critical support link in distribution lines, this device ensures robust short circuit and overload protection, along with seamless current load operations. Engineered with a meticulous assembly of insulating brackets and fuse tubes, the static contacts are securely mounted at each end of the insulation bracket, while moving contacts are precisely positioned at both ends of the innovative fuse tube. The fuse tube itself is a marvel of design, crafted from an advanced combination of an inner arc-extinguishing tube, encased in an outer layer of phenolic paper or epoxy glass cloth tube. The pull-load drop-out fuse is further enhanced with flexible auxiliary contacts and a sophisticated arc chute, ensuring superior performance and reliability when engaging in co-load current operations.
In standard operation, the drop-out fuse maintains a closed position through the tensioned fuse tube. Upon encountering a system fault, the fault current swiftly blows the fuse, igniting an arc that promptly burns through the arc tube. This action triggers the decomposition of substantial gas volumes, generating high pressure within the tube and creating a vertical wind path that rapidly stretches and elongates the arc. Post-blowout, the moving contact loses tension, disengaging and triggering the locking mechanism to release the fuse tube, culminating in its drop to form a breaking position. During load pull operations, the insulating rod is utilized to manipulate the moving contact while the static contact remains engaged. As the insulating rod continues its pull, the auxiliary contacts separate, resulting in arc formation between them. The arc gracefully stretches within the slit of the hood, aided by arc cover gas, until it extinguishes as the current reaches zero.
Use and Standards
This product is expertly crafted for seamless integration into distribution lines branching from 10 to 35KV and on the primary side of distribution transformers. It offers unparalleled overload and short-circuit protection, efficiently handling the separation and combination of rated load currents to ensure optimal system performance.
The product model is meticulously prepared according to the JB/T8321-1996 method for AC high-voltage fuses, with product parameters aligning with the GB15166.3-1994 high voltage fuses expulsion fuses standards. In instances where standards lack explicit parameter and configuration definitions, corrections are applied as per JB/DQ2139-1986 requirements for 10 to 35KV outdoor high voltage drop fuse interim technology.
The drop-out fuse cutout and load switching fuse cutout serve as state-of-the-art outdoor high voltage protective devices. Strategically connected to the incoming feeders of distribution transformers or lines, they play a pivotal role in safeguarding transformers and lines from short circuits and overloads while facilitating efficient on/off load current switching. The drop-out fuse cutout is composed of durable insulator supports and a robust fuse tube, with static contacts firmly affixed to the insulator support's sides and moving contacts installed at the fuse tube's ends. The fuse tube features an advanced inside arc-extinguishing tube, complemented by an outer phenolic compound paper or epoxy glass tube, while the load switching fuse cutout boasts reinforced elastic auxiliary contacts and an arc-extinguishing enclosure to masterfully manage on-off loading currents.
Under normal conditions, the fuse link secures the fuse tube in a steadfast closed position. In the event of system faults, the resultant fault current swiftly melts the fuse link, generating an electric arc that heats and expels substantial gas from the arc-extinguishing tube. This process induces high pressure and arc expulsion along the tube. Once the fuse link melts, the moving contact loses its tension, triggering a mechanism lock and causing the fuse tube to drop, transitioning the cutout to an open position. To switch off during cutout loading, operators utilize an insulating operating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged. However, as pulling progresses, the auxiliary contact separates, resulting in an electric arc that elongates within the arc-extinguishing enclosure gap. Concurrently, arc-extinguishing gas is released to efficiently extinguish the arc as the current crosses 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
Welcome to Zhejiang ChaoTai Complete Equipment Co., Ltd., a beacon of innovation and excellence in the realm of electrical integration. As a high-tech enterprise, we pride ourselves on our exceptional R&D, production, and service team, each with over 15 years of industry expertise, ensuring superior solutions for modern challenges.
Our diverse product range is a testament to our commitment to quality and innovation. Specializing in high-voltage solid-state soft starters, capacitor cabinets, and both high and low voltage switchgear, we also excel in gas-insulated switchgear and substations. Our advanced solutions are seamlessly integrated into a multitude of sectors, from energy and chemical industries to metal smelting, electric power grids, and industrial manufacturing. We cater to a wide array of fields including universities, research institutions, medical and pharmaceutical sectors, municipal commerce, water conservancy and hydropower, road traffic, and even commercial and residential areas. Our products are engineered to meet the dynamic needs of these diverse industries with precision and reliability.
At Zhejiang ChaoTai, we uphold a philosophy of 'smart manufacturing,' driven by relentless technological innovation. By recruiting high-level technical talents, we elevate our core competencies and deliver unparalleled value to our customers as we endeavor to establish the pinnacle brand in our industry. From our inception, we have transformed challenges into opportunities, continuously advancing from inception to excellence. Our formula for success is rooted in innovation, quality, and a modern business ethos, ensuring our survival through superior quality, market alignment, reputation, and management efficiency. We are passionately committed to leveraging technology, standardized management, and exceptional quality to guarantee customer satisfaction, amplifying our competitive edge in the market. Our mission is to revolutionize China's power transmission and distribution sectors with unprecedented speed, strength, and ambition. Integrity is our bedrock, quality is our creed, service is our reverence, and customer satisfaction is our eternal pursuit. Our steadfast dedication to excellence, continuous innovation, and the creation of a credible brand are our guiding lights. With deep gratitude, we acknowledge the support and loyalty of our esteemed clients. Senhang Technology eagerly anticipates forging a brighter future together 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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