Product Description
General
The drop-out fuse and pull load drop-out fuse are quintessential outdoor high-voltage protective devices, serving as the stalwart defenders of electric systems. Strategically installed on the high-voltage side of distribution transformers or embedded within distribution lines, these fuses deliver exceptional defense against transformer and line short circuits and overloads, while meticulously managing open-circuit load currents. Their resilient design incorporates an insulating bracket and fuse tubes; the static contact is securely anchored at each end of the insulation bracket, while the moving contact is situated at the fuse tube's termini. Ingeniously engineered, the fuse tube boasts an inner arc tube encased by an outer phenolic paper tube or an epoxy glass cloth tube. Crafted for operational excellence, the pull load drop-out fuse is equipped with nimble auxiliary contacts and an arc chute, which significantly enhance its operational versatility, especially when handling open or co-load currents.
In routine operations, the drop-out fuse remains closed, maintaining tension on the fuse tube and fuse. Upon system fault occurrence, the fault current quickly melts the fuse, generating an arc. The arc's intense heat releases a surge of gas from the arc tube, escalating the internal pressure. This creates a vertical airflow along the pipeline, skillfully extending and lengthening the arc. Upon fuse rupture, the tension of the moving contact dissipates, activating the locking mechanism, which subsequently releases the fuse tube, guiding it into the open position. For load disconnection, an insulating rod is utilized to disengage the moving contact, initially maintaining its bond with the static contact. Continued rod pulling causes the auxiliary contacts to separate, forming and extending an arc within the enclosure slit. The arc cover's gas aids in extinguishing the arc when the current reaches zero.
Use and Standards
This product stands out with its ingenious design, specifically crafted for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It acts as a stalwart shield against overloads and short circuits, while skillfully managing the separation and union of rated load currents with remarkable efficiency.
Conforming to exemplary standards, the product model aligns seamlessly with the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is meticulously engineered to adhere to the stringent GB15166.3-1994 high voltage fuses expulsion fuses standards. In instances where standards ambiguously define critical parameters and configurations, precision adjustments are made meticulously according to 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 indispensable defense against short circuits and overloads, efficiently managing on/off loading currents. The drop-out fuse cutout features insulating insulator supports and a fuse tube; static contacts are firmly positioned on either side of the insulator support, while moving contacts are situated at the fuse tube's extremities. The intricately designed fuse tube includes an inner arc-extinguishing tube, encapsulated by an outer phenolic compound paper tube or an 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 sealed. When faults occur, fault currents rapidly melt the fuse, producing an electric arc that heats the arc-extinguishing tube, releasing 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, causing the fuse tube to drop out, transitioning 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 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 hits 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 luminous beacon of excellence and innovation within the dynamic world of electrical integration. As a prestigious and distinguished high-tech enterprise, we proudly commit ourselves to spearheading innovation, supported by an illustrious team that excels in research and development, top-tier production, and unparalleled service. With a remarkable legacy spanning over 15 years of transformative experience, we are revolutionizing the industry, setting benchmarks and establishing unparalleled standards of excellence.
Our expansive product range is a reflection of our unwavering commitment to excellence, featuring an array of premium high-voltage solid-state soft starters, sophisticated and advanced capacitor cabinets, versatile high and low voltage switchgear, and cutting-edge gas-insulated switchgear. We also proudly offer state-of-the-art substations, all meticulously tailored to meet the diverse and evolving needs of the industry. From dynamic energy sectors and the intricate world of chemicals to the robust metal smelting industry and expansive electric power grids, our solutions are designed to redefine capabilities. Our advanced offerings are indispensable to industrial manufacturing, esteemed universities, pioneering research institutions, and the vibrant medical and pharmaceutical sectors. In the realm of municipal commerce, water conservancy and hydropower, road traffic systems, and across a broad spectrum of commercial and residential areas, our products are synonymous with unmatched reliability and efficiency, setting the gold standard.
At Zhejiang ChaoTai, our unwavering commitment to technological innovation and our forward-thinking 'smart manufacturing' philosophy propel us to attract and cultivate the most exceptional technical talent. This strategic focus empowers us to enhance our core competitiveness and deliver unparalleled value to our clients, solidifying our position as an undisputed industry leader. From humble beginnings, we've embarked on an extraordinary journey of exponential growth, embracing a contemporary and dynamic business model built on the pillars of superior quality, astute market foresight, and operational efficiency achieved through meticulous management. Our ethos is deeply rooted in prioritizing cutting-edge technology, adhering to standardized management practices, delivering exceptional quality, and ensuring customer satisfaction at every touchpoint. With integrity as our unwavering foundation, quality as our enduring strength, and customer satisfaction as our continuous 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 an even brighter future, hand in hand, paving the way for a new era of innovation and excellence!
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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