Product Description
General
The drop-out fuse and pull load drop-out fuse are critical outdoor high-voltage protective devices, meticulously designed to safeguard electric systems. Positioned strategically on the high-voltage side of distribution transformers or embedded within distribution lines, these fuses provide robust protection against transformer and line short circuits, including overloads, while expertly managing open-circuit load currents. Their stalwart construction includes an insulating bracket paired with fuse tubes; the static contact is securely stationed on each end of the insulation bracket, with the moving contact placed at the fuse tube's tips. Ingeniously crafted, the fuse tube features an inner arc tube embraced by an outer phenolic paper tube or an epoxy glass cloth tube. Built for superior performance, the pull load drop-out fuse is outfitted with nimble auxiliary contacts and an arc chute, enhancing its operational versatility, particularly in handling open or concurrent load currents.
In standard operations, the drop-out fuse remains closed, keeping the fuse tube and fuse taut. Upon encountering a system fault, the fault current rapidly melts the fuse, generating an arc. The intense heat from the arc expels gas from the arc tube, elevating the pressure within. This initiates a vertical airflow along the pipeline, skillfully extending and stretching the arc. As the fuse blows, the tension from the moving contact is relieved, activating the locking mechanism, which subsequently releases the fuse tube, guiding it into the breaking position. For load pulling, an insulating rod is utilized to disengage the moving contact, initially maintaining its connection with the static contact. Continued pulling with the insulating rod causes the auxiliary contacts to disengage, forming and elongating an arc within the hood slit. The arc cover's gas aids in extinguishing the arc when the current drops to zero.
Use and Standards
This product excels with an innovative design tailored for 10 ~ 35KV distribution lines, branch lines, and the primary sides of distribution transformers. It serves as a fortress of protection against overloads and short circuits, while deftly managing the separation and reunion of rated load currents.
Aligned with superior standards, the product model conforms to the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is carefully crafted to comply with the rigorous GB15166.3-1994 high voltage fuses expulsion fuses standards. In cases where standards ambiguously define critical parameters and configurations, precise adjustments are executed 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 integrated into the incoming feeder of distribution transformers or distribution lines, they offer essential defense against short circuits and overloads, effectively managing on/off loading currents. The drop-out fuse cutout consists of insulating insulator supports and a fuse tube; static contacts are securely positioned on either side of the insulator support, and moving contacts are placed at the fuse tube's ends. The sophisticated 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 features robust elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring adept management of on-off loading currents.
Under ordinary operating conditions, the fuse link ensures that the fuse tube remains closed securely. When faults occur, fault currents swiftly 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 moving contact loses tension, triggering the mechanism to lock, and the fuse tube drops out, shifting the cutout to an open state. To switch off during cutout loading, operators use an insulating bar to pull the moving contact. Initially, the main contact and auxiliary static contact stay engaged, but continued 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 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 beacon of excellence in the realm of electrical integration. As a prestigious high-tech enterprise, we are committed to innovation, backed by a distinguished team excelling in R&D, production, and service. With over 15 years of rich experience, we are revolutionizing the industry, setting new standards of excellence.
Our product range is a testament to our commitment to excellence, featuring 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, all tailored to meet diverse industry needs. From dynamic energy and chemical sectors to robust metal smelting and expansive electric power grids, our solutions redefine capabilities. Our advanced offerings are also integral to industrial manufacturing, revered universities, pioneering research entities, as well as thriving medical and pharmaceutical sectors. In municipal commerce, water conservancy and hydropower, road traffic systems, and a vast array of commercial and residential areas, our products deliver unmatched reliability and efficiency.
At Zhejiang ChaoTai, our unwavering commitment to technological innovation and a forward-thinking 'smart manufacturing' philosophy drives us to attract the best in technical talent. This empowers us to enhance our core competitiveness, delivering unparalleled value to our clients while solidifying our position as an industry leader. From humble beginnings, we've embarked on an extraordinary journey of growth, embracing a contemporary business model built on quality, market foresight, and efficiency through meticulous management. Our ethos is grounded in prioritizing technology, adhering to standardized management, 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 build a brand that commands trust. Our heartfelt gratitude goes 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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