Product Description
General
The drop-out fuse and pull load drop-out fuse are quintessential outdoor high-voltage protective devices, meticulously designed to be the stalwarts of electric systems. Strategically positioned on the high-voltage side of distribution transformers or embedded within distribution lines, these fuses provide an indomitable shield against transformer and line short circuits, as well as overloads, while expertly handling open-circuit load currents. Their durable construction boasts an insulating bracket and fuse tubes; the static contact is firmly anchored at each end of the insulation bracket, while the moving contact finds its place at the ends of the fuse tube. Ingeniously engineered, the fuse tube features an inner arc tube enveloped by an outer phenolic paper tube or an epoxy glass cloth tube. Crafted for operational superiority, the pull load drop-out fuse is furnished with nimble auxiliary contacts and an arc chute, enhancing its operational versatility, particularly in managing open or co-load currents.
In routine operations, the drop-out fuse maintains a closed position, keeping the fuse tube and fuse securely taut. Upon the occurrence of a system fault, the fault current quickly melts the fuse, generating an arc. The intense heat from the arc causes a release of gas from the arc tube, increasing the pressure within. This initiates a vertical airflow along the pipeline, skillfully stretching and elongating the arc. As the fuse blows, the tension in the moving contact dissipates, engaging the locking mechanism to release the fuse tube, coaxing it into the breaking position. For load pulling, an insulating rod is utilized to disengage the moving contact, initially preserving its connection with the static contact. Continuous pulling with the insulating rod causes auxiliary contacts to detach, forming and lengthening an arc within the hood slit. The arc cover's emitted gas aids in extinguishing the arc as the current reduces to zero.
Use and Standards
This product excels with its ingenious design, tailored for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It stands as a stalwart of protection against overloads and short circuits, skillfully managing the separation and union of rated load currents.
Adhering to the highest standards, the product model aligns with the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is precisely engineered to meet the rigorous GB15166.3-1994 high voltage fuses expulsion fuses standards. In cases where standards ambiguously define crucial parameters and configurations, precise adjustments are executed in line 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 for outdoor high-voltage protection. Seamlessly integrated into the incoming feeder of distribution transformers or distribution lines, they provide essential defense against short circuits and overloads, efficiently managing on/off loading currents. The drop-out fuse cutout features insulated insulator supports and a fuse tube; static contacts are securely positioned on either side of the insulator support, while moving contacts are situated at the ends of the fuse tube. The intricate design of the fuse tube encompasses an inner arc-extinguishing tube, encased by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout boasts robust elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring proficient management of on-off loading currents.
Under standard operational conditions, the fuse link ensures that the fuse tube remains firmly closed. When faults occur, fault currents rapidly melt the fuse, creating an electric arc that heats the arc-extinguishing tube, releasing copious amounts of gas. This heightened pressure propels the arc along the tube. Once the fuse link melts, the moving contact loses tension, triggering the mechanism to lock, and the fuse tube drops out, transitioning the cutout to an open state. To execute a cutout load switch off, operators employ an insulating bar to 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, ensuring the arc is extinguished as the current reaches 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. emerges as a luminary in the field of electrical integration, demonstrating unparalleled excellence. As a highly esteemed high-tech enterprise, we are devoted to spearheading innovation, supported by an elite team known for exceptional prowess in R&D, production, and service. With an impressive legacy spanning over 15 years, we are at the forefront of industry transformation, consistently setting and surpassing new benchmarks in excellence.
Our expansive product portfolio epitomizes our dedication to superior quality, featuring distinguished high-voltage solid-state soft starters, advanced capacitor cabinets, adaptable high and low voltage switchgear, alongside pioneering gas-insulated switchgear. Additionally, we offer cutting-edge substations, customized to fulfill a diverse array of industry demands. Our solutions are pivotal in revolutionizing the dynamic energy and chemical sectors, empowering robust metal smelting processes, and enhancing expansive electric power grids. Our sophisticated technologies are integral to industrial manufacturing, esteemed universities, and innovative research entities, as well as the thriving medical and pharmaceutical domains. Within municipal commerce, water conservancy and hydropower, road traffic systems, and a wide spectrum of commercial and residential areas, our products deliver unparalleled reliability and efficiency, setting new standards in performance.
At Zhejiang ChaoTai, our steadfast dedication to technological innovation and our forward-looking 'smart manufacturing' vision inspire us to attract top-tier technical talent. This enables us to continually enhance our core competencies, delivering unrivaled value to our clients and reinforcing our stature as an industry leader. From our modest beginnings, we have embarked on a remarkable growth journey, embracing a contemporary business model grounded in quality, market acumen, and efficiency through meticulous management. Our guiding principles rest on prioritizing technology, upholding standardized management, ensuring superior quality, and achieving customer satisfaction. With integrity as our cornerstone, quality as our strength, and customer satisfaction as our perpetual mission, we strive to excel, innovate, and foster a brand that inspires trust. We extend our heartfelt gratitude to our esteemed customers for their unwavering support and loyalty. In collaboration with Senhang Technology, we are poised to forge a brighter future, together, with hands joined in partnership!
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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