Product Description
**General**
The drop-out fuse and pull load drop-out fuse are indispensable outdoor high-voltage protective devices, expertly engineered to safeguard electric systems. Positioned on the high-voltage side of distribution transformers or within distribution lines, these fuses deliver unmatched protection against transformer and line short circuits, along with overloads, while proficiently managing open-circuit load currents. Their sturdy construction includes an insulating bracket and fuse tubes; the static contact is securely anchored on each end of the insulation bracket, while the moving contact is strategically placed at the fuse tube's ends. The fuse tube is innovatively designed with an inner arc tube enveloped by an outer phenolic paper tube or an epoxy glass cloth tube. For optimal operation, the pull load drop-out fuse is fitted with agile auxiliary contacts and an arc chute, enhancing its operational agility, especially in handling open or co-load currents with finesse and precision.
In routine operations, the drop-out fuse remains closed, keeping the fuse tube and fuse in tension. Upon a system fault, the fault current rapidly melts the fuse, creating an arc. This arc's intense heat propels a surge of gas from the arc tube, increasing pressure inside the tube. This triggers a vertical airflow along the pipeline, effectively stretching and lengthening the arc. As the fuse blows, the tension of the moving contact dissipates, activating the locking mechanism, which then releases the fuse tube, guiding it to the breaking position. For load pulling, an insulating rod is utilized to disengage the moving contact, initially keeping it connected with the static contact. Consistent pulling with the insulating rod causes the auxiliary contacts to separate, forming and stretching an arc within the hood slit. The arc cover's gas assists in extinguishing the arc when the current falls to zero, ensuring a seamless transition and enhanced safety.
**Use and Standards**
This product boasts a masterfully engineered design for 10 ~ 35KV distribution lines, branch lines, and the primary sides of distribution transformers. It serves as a steadfast protector against overloads and short circuits, while proficiently managing the separation and union of rated load currents, ensuring an uninterrupted and reliable power supply.
Conforming to top-tier standards, the product model is aligned with the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is meticulously crafted to meet the demanding GB15166.3-1994 high voltage fuses expulsion fuses standards. In instances where standards ambiguously outline essential parameters and configurations, precise adjustments are executed in compliance with JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology, ensuring superior performance and dependability.
Drop-out fuse cutouts and load switching fuse cutouts are pivotal 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 managing on/off loading currents. The drop-out fuse cutout features insulate insulator supports and a fuse tube; static contacts are firmly placed on either side of the insulator support, while moving contacts rest at the ends of the fuse tube. The sophisticated design of the fuse tube includes an inner arc-extinguishing tube, encased by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout boasts resilient elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring proficient management of on-off loading currents with precision and efficiency.
Under standard operating conditions, the fuse link ensures the fuse tube remains securely closed. When faults occur, fault currents quickly melt the fuse, creating an electric arc that heats the arc-extinguishing tube, releasing ample gas. This high pressure propels 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, 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 elongates within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism releases gas, ensuring the arc is extinguished as the current reaches zero, offering seamless and secure operational capabilities.
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 beacon of excellence within the electrical integration industry. Esteemed as a prestigious high-tech enterprise, our commitment to innovation is unwavering, supported by a distinguished team that excels in research and development, production, and service. With a legacy spanning over 15 years of rich experience, we are reshaping the industry, setting new standards of excellence and innovation that propel us to the forefront of technological advancements.
Our product lineup is a testament to our unwavering 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 offer state-of-the-art substations, meticulously tailored to meet the diverse needs of various industries. From the dynamic energy and chemical sectors to robust metal smelting and expansive electric power grids, our solutions are redefining industry capabilities. Our advanced offerings are integral to industrial manufacturing, revered universities, pioneering research entities, as well as the 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, setting a new benchmark for operational excellence.
At Zhejiang ChaoTai, our unwavering commitment to technological innovation and our forward-thinking 'smart manufacturing' philosophy drive us to attract the finest 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 and respect. 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 and more prosperous 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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