Product Description
General
The drop-out fuse and pull load drop-out fuse are indispensable outdoor high-voltage protective devices, meticulously engineered to safeguard electrical systems with unmatched precision. Strategically placed on the high-voltage side of distribution transformers or integrated within distribution lines, these fuses deliver unparalleled protection against transformer and line short circuits and overloads, while skillfully managing open-circuit load currents with ease. Their robust architecture boasts an insulating bracket and fuse tubes; the static contact is securely anchored at each end of the insulation bracket, while the moving contact is precisely positioned at the fuse tube's termini. Ingeniously designed, the fuse tube features an inner arc tube, enveloped by an outer phenolic paper tube or epoxy glass cloth tube. The pull load drop-out fuse is thoughtfully equipped with nimble auxiliary contacts and an arc chute, enhancing its operational dexterity, particularly when addressing open or co-load currents with confidence.
In routine operations, the drop-out fuse remains engaged, keeping the fuse tube and fuse under optimal tension. Upon the occurrence of a system fault, the fault current swiftly melts the fuse, generating an arc. The arc's intense heat prompts a surge of gas emissions from the arc tube, elevating the pressure within. This initiates a vertical airflow along the conduit, expertly stretching and elongating the arc. As the fuse blows, the moving contact's tension dissipates, activating the locking mechanism, which then releases the fuse tube, guiding it into the breaking position. For load pulling, an insulating rod is utilized to disengage the moving contact, initially preserving its link with the static contact. Continued pulling with the insulating rod causes the auxiliary contacts to separate, forming and elongating an arc within the hood slit. The arc cover's emitted gas facilitates the arc's extinction as the current approaches zero.
Use and Standards
This product stands out with a brilliant design specifically crafted for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It acts as a stalwart protector against overloads and short circuits, while adeptly managing the separation and union of rated load currents.
Adhering to the highest standards of excellence, the product model complies with the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is flawlessly engineered to conform to the rigorous GB15166.3-1994 high voltage fuses expulsion fuses standards. In cases where standards ambiguously define critical parameters and configurations, precise adjustments are meticulously implemented 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 vital 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, expertly managing on/off loading currents. The drop-out fuse cutout features robust insulating insulator supports and a fuse tube; static contacts are securely placed on either side of the insulator support, and moving contacts are precisely positioned at the ends of the fuse tube. The intricate design of the fuse tube includes an inner arc-extinguishing tube, encapsulated by an outer phenolic compound paper tube 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 on-off loading currents.
Under standard operating conditions, the fuse link ensures that the fuse tube remains securely closed. Upon the occurrence of faults, fault currents rapidly melt the fuse, generating an electric arc that heats the arc-extinguishing tube, resulting in the release of copious gas. This high pressure propels the arc along the tube. Once the fuse link melts, the tension in the moving contact is lost, triggering the locking mechanism, leading to the fuse tube dropping out and transitioning the cutout to an open state. During cutout loading, operators use 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. 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. stands as a shining beacon of excellence in the realm of electrical integration. Esteemed as a prestigious high-tech enterprise, our unwavering dedication to innovation is bolstered by a distinguished team renowned for their prowess in R&D, production, and unparalleled service. With a rich legacy spanning over 15 years, we are at the forefront of revolutionizing the industry, consistently setting new benchmarks for excellence and innovation.
Our extensive product range eloquently showcases our unwavering commitment to excellence. We proudly feature premium high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, and groundbreaking gas-insulated switchgear. In addition, we offer state-of-the-art substations, meticulously tailored to address diverse industry demands. Our innovative solutions are pivotal in dynamic energy and chemical sectors, robust metal smelting industries, and expansive electric power grids, consistently redefining operational capabilities. Furthermore, our cutting-edge offerings are integral to industrial manufacturing, esteemed universities, pioneering research entities, as well as the thriving medical and pharmaceutical sectors. In municipal commerce, water conservancy and hydropower, road traffic systems, and an extensive range of commercial and residential domains, our products deliver unmatched reliability and efficiency, setting unparalleled standards.
At Zhejiang ChaoTai, our unwavering dedication to technological innovation and forward-thinking 'smart manufacturing' philosophy continuously propels us to attract top-tier technical talent. This empowers us to amplify our core competitiveness, providing unparalleled value to our clients while fortifying our esteemed position as an industry leader. From humble origins, we have embarked on an extraordinary growth journey, embracing a contemporary business model founded on quality, market foresight, and enhanced efficiency through meticulous management. Our ethos is firmly rooted in prioritizing technology, adhering to standardized management, delivering exceptional quality, and ensuring unwavering customer satisfaction. With integrity as our foundation, quality as our strength, and customer satisfaction as our relentless mission, we endeavor to excel, innovate, and cultivate a brand that commands unwavering trust. Our heartfelt gratitude extends to all our esteemed customers for their unwavering support and loyalty. Alongside Senhang Technology, we stand ready to shape a brighter, more luminous 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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