Product Description
General
The Drop Out Fuse and Pull Load Drop Out Fuse stand as essential outdoor high-voltage protective devices meticulously crafted to be the steadfast guardians of electrical systems. Strategically positioned on the high-voltage side of distribution transformers or within distribution lines, these fuses deliver uncompromising defense against transformer and line short circuits, as well as overload protection, while skillfully managing open-circuit load currents. Boasting a robust construction, they feature an insulating bracket and fuse tubes; the static contact is firmly secured at each end of the insulating bracket, while the moving contact is strategically positioned at the extremities of the fuse tube. Ingeniously designed, the fuse tube comprises an inner arc tube enveloped by an outer phenolic paper or epoxy glass cloth tube. Tailored for operational excellence, the pull load drop-out fuse is equipped with agile auxiliary contacts and an arc chute, enhancing its operational adaptability, especially when addressing open or co-load currents with precision.
During typical operations, the drop-out fuse remains securely closed, maintaining tension on the fuse tube and fuse. In the event of a system fault, the fault current swiftly melts the fuse, creating an arc. The intense heat generated by the arc causes a powerful outflow of gas from the arc tube, increasing the tube's internal pressure. This action initiates a vertical airflow along the pipeline, which adeptly extends and elongates the arc. Once the fuse blows, the tension of the moving contact is released, activating the locking mechanism, which allows the fuse tube to move into the breaking position. For load pulling, an insulating rod is used to disengage the moving contact while initially keeping it in contact with the static contact. Continued pulling with the insulating rod results in the detachment of the auxiliary contacts, forming and elongating an arc within the hood slit. The gas released by the arc cover aids in extinguishing the arc when the current decreases to zero.
Use and Standards
This product excels with its innovative design, specifically tailored for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It serves as a reliable bastion against overloads and short circuits, while expertly managing the separation and connection of rated load currents.
Adhering to the highest standards, the product model aligns with the JB/T8321-1996 Method for type AC high-voltage fuse preparation. It is engineered with meticulous precision to meet the rigorous GB15166.3-1994 high voltage fuses expulsion fuses standards. In instances where standards ambiguously define critical parameters and configurations, precise 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 for outdoor high voltage protection. Seamlessly incorporated into the incoming feeder of distribution transformers or distribution lines, they provide essential defense against short circuits and overloads, efficiently handling the management of loading currents on and off. The drop-out fuse cutout features insulate insulator supports and a fuse tube; static contacts are securely placed on either side of the insulator support, and moving contacts reside at the ends of the fuse tube. The intricately designed fuse tube includes an inner arc-extinguishing tube, encapsulated by an outer phenolic compound paper or epoxy glass tube. The load switching fuse cutout is equipped with robust elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring proficient management of load currents on and off.
Under standard operational conditions, the fuse link ensures that the fuse tube remains securely closed. Upon the occurrence of faults, fault currents rapidly cause the fuse to melt, generating an electric arc that heats the arc-extinguishing tube and releases abundant gas. This high pressure propels the arc along the tube. Once the fuse link melts, the moving contact loses tension, activating the locking mechanism, allowing the fuse tube to drop out, transitioning the cutout to an open state. For switching off during cutout loading, operators utilize an insulating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but further pulling causes the auxiliary contacts to disengage, generating an electric arc that elongates within the arc-extinguishing enclosure gap. Simultaneously, 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. is a true beacon of excellence within the expansive realm of electrical integration. As a prestigious high-tech enterprise, we are passionately dedicated to groundbreaking innovation, supported by a distinguished team that excels in research and development, production, and unparalleled service. With a wealth of over 15 years of profound experience, we are transforming the industry landscape and setting new, unparalleled standards of excellence.
Our illustrious product range stands as a testament to our unwavering commitment to excellence, showcasing premium high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, and cutting-edge gas-insulated switchgear. We also offer state-of-the-art substations, each meticulously tailored to fulfill the diverse needs of various industries. From the dynamic energy and chemical sectors to robust metal smelting and expansive electric power grids, our innovative solutions redefine industry capabilities. Our advanced offerings are integral to industrial manufacturing, revered universities, pioneering research entities, and thriving medical and pharmaceutical sectors alike. In municipal commerce, water conservancy and hydropower, road traffic systems, and a vast array of commercial and residential settings, our products consistently deliver unmatched reliability and efficiency.
At Zhejiang ChaoTai, our unwavering commitment to technological innovation and forward-thinking 'smart manufacturing' philosophy compels us to attract the pinnacle of technical talent. This empowers us to elevate our core competitiveness, delivering unmatched value to our clients while solidifying our position as an industry forerunner. From humble beginnings, we have embarked on an extraordinary journey of growth, embracing a contemporary business model founded on quality, market foresight, and efficiency through meticulous management. Our ethos is rooted in prioritizing technology, adhering to standardized management, delivering exceptional quality, and ensuring absolute customer satisfaction. With integrity as our foundation, quality as our strength, and customer satisfaction as our unwavering mission, we aim to excel, innovate, and build a brand that commands trust and admiration. Our heartfelt gratitude extends to all our esteemed customers for their unwavering support and loyalty. Together with Senhang Technology, we are poised to craft 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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