Product Description
General
The drop-out fuse and pull load drop-out fuse are pivotal outdoor high-voltage protective devices, essential for the ultimate safeguarding of electrical systems. Typically installed on the high-voltage side of distribution transformers or integrated into distribution lines as a supportive link, these fuses offer robust protection against transformer and line short circuits, overloads, and allow for smooth open-circuit load current facilitation. Constructed with a reliable insulating bracket and robust fuse tubes, the static contact is meticulously affixed to both ends of the insulation bracket, while the dynamic moving contact is precisely mounted on the fuse tube ends. The fuse tube itself, a marvel of engineering, is crafted from an inner arc tube enveloped by a durable outer phenolic paper tube or a sturdy epoxy glass cloth tube. The pull load drop-out fuse is innovatively equipped with adaptable auxiliary contacts and an arc chute, significantly enhancing operational flexibility when managing open-circuit or load currents.
During normal operation, the drop-out fuse maintains a steadfast closed position, with the fuse tube and fuse securely under tension. Upon system failure, the fault current swiftly melts the fuse, generating a powerful arc. The arc tube, subjected to the intense heat of the arc, releases copious amounts of gas, creating high pressure within the tube. This creates a vertical wind along the pipeline, effectively stretching and elongating the arc. When the fuse blows, the moving contact loses its tension, triggers the locking mechanism, releasing the fuse tube, which gracefully drops into the breaking position. To pull the load, an insulating rod is employed to disengage the moving contact, initially maintaining contact with the static contact. As the pulling continues with the insulating rod, the auxiliary contacts separate, with an arc forming and elongating within the hood slit. Gas within the arc cover facilitates the rapid extinguishing of the arc when the current reaches zero.
Use and Standards
This product is ingeniously designed for seamless application in 10 ~ 35KV distribution lines, branching lines, and the primary side of distribution transformers. It provides exemplary protection against overloads and short circuits, while adeptly managing the seamless separation and combination of rated load currents with utmost reliability.
The product model strictly adheres to the JB/T8321-1996 Method for type AC high-voltage fuses preparation, ensuring precision and reliability. It is engineered in full compliance with the GB15166.3-1994 high voltage fuses expulsion fuses standards, guaranteeing adherence to industry benchmarks. Where standards ambiguously define key parameters and configurations, meticulous corrections are made in accordance with JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology, ensuring flawless performance.
Drop-out fuse cutouts and load switching fuse cutouts represent the pinnacle of outdoor high voltage protective devices. Seamlessly integrated with the incoming feeder of distribution transformers or distribution lines, they provide indispensable protection against short circuits and overloads, all while deftly managing on/off loading currents with precision. The drop-out fuse cutout comprises insulate insulator supports and a sophisticated fuse tube, with static contacts securely anchored on both sides of the insulator support and moving contacts expertly installed at the fuse tube ends. The fuse tube's architecture is a testament to cutting-edge design, featuring an inner arc-extinguishing tube enveloped by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is equipped with enforced elastic auxiliary contacts and an arc-extinguishing enclosure to adeptly manage on-off loading currents with unparalleled efficiency.
In the realm of normal working conditions, the fuse link ensures the fuse tube is reliably secured in a closed position. When system faults occur, the fault current rapidly melts the fuse, producing an intense electric arc that heats the arc-extinguishing tube and releases substantial gas, generating high pressure that propels the arc along the tube with force. Upon melting of the fuse link, the moving contact loses its tension, the mechanism locks, and the fuse tube gracefully drops out, transitioning the cutout into an open position with ease. To switch off during cutout loading, operators utilize a skillfully designed insulating operating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but further pulling deftly disengages the auxiliary contacts, generating an electric arc that elegantly elongates within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism releases gas to swiftly extinguish the arc as the current passes zero, ensuring operational safety and reliability.
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 proudly at the pinnacle of electrical integration as a distinguished high-tech enterprise. With a celebrated team excelling in R&D, production, and service, we bring to bear over 15 years of profound expertise to drive innovation and supremacy in the industry.
Our diverse and remarkable product range redefines excellence, featuring high-voltage solid-state soft starters, capacitor cabinets, an array of high and low voltage switchgear, cutting-edge gas-insulated switchgear, and state-of-the-art substations. These solutions find crucial applications in a variety of sectors, such as the vibrant energy and chemical industries, the robust realms of metal smelting, expansive electric power grids, and pioneering industrial manufacturing. We extend our solutions to prestigious universities, leading research institutions, and the thriving medical and pharmaceutical sectors, as well as municipal commerce. Our expertise further benefits the essential water conservancy and hydropower sectors, comprehensive road traffic systems, and an array of commercial and residential facets.
Driven by an unwavering commitment to technological innovation and a visionary 'smart manufacturing' ethos, we focus intently on attracting elite technical talent. This dedication bolsters our core competitiveness, allowing us to deliver unmatched value to our clients while propelling our brand to the forefront of the industry. Since our inception, our journey has been nothing short of extraordinary, evolving from modest origins to a beacon of industry excellence. Our guiding principles revolve around innovation, embracing a modern business model that thrives on quality for sustainability, market focus for expansion, reputation for advancement, and meticulous management for efficiency. Our steadfast promise is to let technology guide us, maintain standardized management, offer superior quality, and achieve customer satisfaction. This solidifies our market prominence and drives us to serve China's electric power and grid sectors with ambitious aspirations. Integrity is our foundation, quality is our strength, service is our hallmark, and customer satisfaction is our perpetual mission. Our resolute objectives are the pursuit of excellence, relentless innovation, and developing a brand that inspires trust. Your recognition fuels our path, and we extend our deepest gratitude to all our esteemed customers for their steadfast support and loyalty. Together with Senhang Technology, we eagerly anticipate crafting a brighter future, 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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