Product Description
General
The drop-out fuse and pull load drop-out fuse are quintessential outdoor high-voltage protective devices, crucial for the safeguarding of electrical systems. These fuses are typically positioned on the high-voltage side of distribution transformers or serve as a vital connection in distribution lines. They offer unparalleled protection from transformer and line short circuits, manage overloads, and enable open-circuit load currents. Crafted with precision, the fuses feature an insulating bracket and robust fuse tubes. The static contact is meticulously secured to both ends of the insulation bracket, while the moving contact finds its place at the fuse tube ends. The fuse tube is a marvel of engineering, consisting of an inner arc tube encased by an outer phenolic paper tube or an epoxy glass cloth tube. Moreover, the pull load drop-out fuse is enhanced with flexible auxiliary contacts and a sophisticated arc chute, which together amplify operational flexibility during open-circuit or load currents.
In routine operations, the drop-out fuse remains securely in a closed position, with the fuse tube and fuse maintained under tension. In the event of a system anomaly, the fault current swiftly melts the fuse, culminating in an arc. This arc subjects the arc tube to intense heat, releasing abundant gas that establishes high pressure within the tube, forming a vertical wind along the pipeline to stretch and elongate the arc. Upon the fuse's activation, the moving contact is relieved of tension, which activates the locking mechanism, releasing the fuse tube and gracefully shifting it into the breaking position. For load pulling, an insulating rod is adeptly used to disengage the moving contact, initially maintaining contact with the static contact. Persistent pulling with the insulating rod subsequently separates the auxiliary contacts. An arc materializes and elongates within the hood slit, and gas within the arc cover facilitates arc extinguishment as the current reaches zero.
Use and Standards
This product is masterfully engineered for use in 10 ~ 35KV distribution lines, branching lines, and on the primary side of distribution transformers. It offers outstanding protection against overloads and short circuits, while expertly managing the separation and combination of rated load currents.
The product model is precisely aligned with the JB/T8321-1996 standard for type AC high-voltage fuses. It is crafted in strict compliance with the GB15166.3-1994 standards for high voltage fuses. In cases where standards ambiguously define essential parameters and configurations, adjustments are made in accordance with JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology.
Drop-out fuse cutouts and load switching fuse cutouts are indispensable outdoor high voltage protective devices. They are seamlessly integrated into the incoming feeder of distribution transformers or distribution lines, offering critical protection against short circuits and overloads, while efficiently managing on/off loading currents. The drop-out fuse cutout is composed of insulate insulator supports and a robust fuse tube, with static contacts securely affixed on both sides of the insulator support, and moving contacts strategically installed at the fuse tube ends. The architecture of the fuse tube boasts an inner arc-extinguishing tube surrounded by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is enhanced with enforced elastic auxiliary contacts and an advanced arc-extinguishing enclosure to skillfully manage on-off loading current.
Under standard operating conditions, the fuse link ensures the fuse tube is firmly held in a closed position. In the event of system faults, the fault current swiftly melts the fuse, producing an arc that heats the arc-extinguishing tube. This process releases a substantial volume of gas, creating high pressure that effectively blows the arc along the tube. Upon melting of the fuse link, the moving contact loses its tension, triggering the mechanism to lock, and the fuse tube is released, transitioning the cutout to an open position. To switch off during cutout loading, operators utilize an insulating operating bar to skillfully pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but further pulling disengages the auxiliary contacts, generating an electric arc that elongates within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism releases gas to efficiently extinguish the arc as the current passes 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
Zhejiang Chaotai Complete Equipment Co., Ltd. is a luminary in the realm of electrical integration, celebrated as a prestigious high-tech enterprise. With a distinguished team passionate about R&D, production, and customer service, our company is empowered by over 15 years of rich and transformative experience. This extensive expertise fuels our relentless drive to innovate and excel, marking us as leaders in the industry.
Our product portfolio is truly remarkable and encompasses a diverse range of solutions, including high-voltage solid-state soft starters, advanced capacitor cabinets, sophisticated high and low voltage switchgear, cutting-edge gas-insulated switchgear, and state-of-the-art substations. These solutions are indispensable across varied sectors: from the dynamic energy and chemical industries to the robust metal smelting operations; from the sprawling electric power grids to groundbreaking industrial manufacturing. Our impact reverberates through esteemed universities, trailblazing research institutions, and the thriving medical and pharmaceutical industries. We are integral to municipal commerce and pivotal in the water conservancy and hydropower sectors, as well as road traffic systems. Our expertise further extends to a broad spectrum of commercial and residential domains.
Driven by an unwavering commitment to technological innovation and our visionary 'smart manufacturing' philosophy, we strive to attract top-notch technical talent. This strategic focus bolsters our core competitiveness, enabling us to deliver unmatched value to our clients and aspiring to solidify our standing as industry pioneers. Since our inception, our trajectory of growth has been remarkable, transforming from modest beginnings to a beacon of industry excellence. Our ethos is anchored in innovation, and we thrive on a forward-thinking business model that relies on quality for survival, market insight for growth, and a sterling reputation for development. Efficiency arises from meticulous management. We vow to prioritize technology as our guiding star, adhere to standardized management practices, uphold exceptional quality, and fulfill customer expectations. This commitment not only fortifies our market presence but also empowers us to serve China's electric power and grid sectors with ambitious objectives. Integrity forms our bedrock, quality is our forte, service is our signature, and customer satisfaction remains our relentless pursuit. Our steadfast ambition is the pursuit of excellence, ceaseless innovation, and the creation of a brand synonymous with trust. Your recognition is the wind beneath our wings, and we express our deepest gratitude to all our esteemed customers for their unwavering 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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