Product Description
General
The drop-out fuse and pull load drop-out fuse represent the pinnacle of outdoor high-voltage protection devices, masterfully engineered to shield electric systems from adversity. Positioned on the high-voltage side of distribution transformers or integrated within distribution lines, these advanced fuses provide robust protection against transformer and line short circuits, as well as overloads, while efficiently managing open-circuit load currents. Their sophisticated build includes an insulating bracket and fuse tubes; with static contacts steadfastly mounted on each end of the insulation bracket, and the dynamic moving contact located at the extremities of the fuse tube. Ingeniously designed, the fuse tube houses an inner arc tube enveloped by an outer phenolic paper tube or an epoxy glass cloth tube. Crafted for superior performance, the pull load drop-out fuse is enhanced with nimble auxiliary contacts and an arc chute, significantly boosting its operational versatility, particularly when handling open or co-load currents.
In routine operations, the drop-out fuse remains closed, maintaining the fuse tube and fuse in a taut state. Upon a system fault, the fault current rapidly melts the fuse, birthing a fierce arc. The intense heat of the arc causes an effusion of gas from the arc tube, increasing the internal pressure within the tube. This action triggers a vertical airflow through the pipeline, adeptly stretching and elongating the arc. As the fuse blows, the moving contact's tension is released, triggering the locking mechanism to disengage, thus releasing the fuse tube and facilitating its movement into the breaking position. For load disconnection, an insulating rod is utilized to withdraw the moving contact, initially keeping it in connection with the static contact. Continued pulling with the insulating rod results in the auxiliary contacts disengaging, forming and extending an arc within the hood slit. The arc cover's gas aids in extinguishing the arc when the current diminishes to zero.
Use and Standards
This product is distinguished by its innovative design, specifically created for 10 ~ 35KV distribution lines, branch lines, and the primary sides of distribution transformers. It serves as a formidable barrier against overloads and short circuits, while adeptly facilitating the separation and union of rated load currents.
Conforming to exemplary standards, the product model complies with the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is precisely engineered to align with the stringent GB15166.3-1994 high voltage fuses expulsion fuses standards. Where standards ambiguously outline critical parameters and configurations, precise adjustments are meticulously 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 crucial defense against short circuits and overloads, expertly managing on/off loading currents. The drop-out fuse cutout is composed of an insulating support and a fuse tube; static contacts are securely positioned on either side of the insulator support, with moving contacts placed at the ends of the fuse tube. The complex design of the fuse tube includes an inner arc-extinguishing tube, enveloped by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout features resilient elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring expert management of on-off loading currents.
Under standard operational conditions, the fuse link ensures that the fuse tube remains firmly closed. When faults arise, fault currents quickly melt the fuse, creating an electric arc that heats the arc-extinguishing tube, releasing abundant gas. This high pressure drives the arc along the tube. Once the fuse link melts, the tension in the moving contact is released, activating the mechanism to lock, and the fuse tube is released, transitioning the cutout to an open state. To disconnect during cutout loading, 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 extends within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism releases gas, ensuring the arc is extinguished as the current drops to 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 dynamic field of electrical integration. Esteemed as a prestigious high-tech enterprise, we are unwaveringly committed to fostering innovation, powered by a distinguished team that excels in cutting-edge R&D, production mastery, and exceptional service. Drawing from an impressive reservoir of over 15 years of profound experience, we are trailblazers in the industry, continually setting new benchmarks of excellence.
Our expansive product range is a testament to our unwavering dedication to excellence, featuring an array of premium high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, and cutting-edge gas-insulated switchgear. We also provide state-of-the-art substations, expertly tailored to cater to diverse industry needs. From the dynamic energy and chemical sectors to the robust realms of metal smelting and expansive electric power grids, our groundbreaking solutions redefine capabilities. Our advanced offerings also play a pivotal role in industrial manufacturing, prestigious universities, pioneering research entities, as well as thriving medical and pharmaceutical sectors. In municipal commerce, water conservancy and hydropower, road traffic systems, alongside a vast array of commercial and residential areas, our products deliver unparalleled reliability and efficiency, setting new standards.
At Zhejiang ChaoTai, our unyielding commitment to technological innovation and our forward-thinking 'smart manufacturing' philosophy propel us to attract the finest technical talent. This empowers us to enhance our core competitiveness, allowing us to deliver unparalleled value to our clients while solidifying our position as a preeminent industry leader. From humble beginnings, we've embarked on an extraordinary journey of growth, embracing a contemporary business model built on quality, astute market foresight, and unparalleled efficiency through meticulous management. Our ethos is firmly grounded in prioritizing cutting-edge technology, adhering to standardized management excellence, delivering exceptional quality, and ensuring customer satisfaction. With integrity as our foundation, quality as our strength, and customer satisfaction as our continuous mission, we aim to excel, innovate, and consistently build a brand that commands trust. Our heartfelt gratitude extends to all our esteemed customers for their unwavering support and loyalty. In partnership with Senhang Technology, we are poised to craft a brighter future, collaboratively forging ahead, 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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