Product Description
General
Our Drop-out Fuse and Pull Load Drop-out Fuse are essential outdoor high-voltage protection devices, meticulously designed for placement on the high-voltage side of distribution transformers or as part of the distribution line's support link. They offer unparalleled protection against transformer and line short circuits, overloads, and facilitate the opening and co-loading of current. Crafted with precision, the Drop-out Fuse integrates an insulating bracket and fuse tubes. Static contacts adorn each end of the insulation bracket, while the movable contacts are expertly fitted at both ends of the fuse tube. The fuse tube itself boasts an inner arc tube encompassed by either a phenolic paper tube or an epoxy glass cloth tube. Our Pull Load Drop-out Fuse elevates operational flexibility with auxiliary contacts and an arc chute, ensuring seamless open and co-load current handling.
During standard operations, the drop-out fuse maintains a closed position through the tensioned fuse tube. Upon system failure, the swift action of the fault current blowing the fuse instigates the formation of an arc. This arc induces combustion within the arc tube, yielding copious gas and generating high-pressure conditions within the tube. This pressure fuels a vertical wind along the pipeline, swiftly stretching and elongating the arc. With the fuse blown, the moving contact loses its tension, triggering the release of the fuse tube from the locking mechanism, thus enabling the fuse tube to drop and establish a breaking position. For load switching, an insulating rod is utilized to disengage the moving contact. Initially, both the moving and static contacts remain engaged. As the insulating rod continues to pull, the auxiliary contacts disengage, sparking an arc that extends within the hood slit. The gas within the arc cover aids in extinguishing the arc when the current reaches zero.
Use and Standards
Engineered for precision, this versatile product operates across 10 to 35KV distribution lines, ideal for both branching lines and the primary side of distribution transformers. It is expertly designed to deliver exceptional overload and short circuit protection, as well as facilitate seamless separation and combination of the rated load current.
Our product model follows the esteemed JB/T8321-1996 Method for AC high-voltage fuses preparation, ensuring reliability and safety. The product parameters are defined by the GB15166.3-1994 standards for high voltage fuses and expulsion fuses, while any undefined critical parameters and configurations are amended in accordance with JB/DQ2139-1986 10 ~ 35KV outdoor high voltage drop fuse interim technology requirements, ensuring compliance and performance excellence.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are indispensable outdoor high-voltage protective devices. Seamlessly connecting with the incoming feeder of distribution transformers or lines, they offer robust protection against transformer or line shorts and overloads, in addition to on/off loading and current management. The Drop-out Fuse Cutout is composed of insulating support and a durable fuse tube, with static contacts fastened on either side of the insulator support and a moving contact positioned at each end of the fuse tube. The fuse tube features an inner arc-extinguishing tube and is enveloped by an outer phenolic compound paper tube or epoxy glass tube. The Load Switching Fuse Cutout is equipped with elastic auxiliary contacts and an arc-extinguishing enclosure to efficiently manage switching on-off loading current.
In normal function, the fuse link secures the fuse tube, maintaining a closed position. Should system faults occur, the fault current swiftly melts the fuse link, producing an electric arc that heats the arc-extinguishing tube, leading to the release of significant gas. This process creates high pressure that propels the arc along the tube. Upon melting, the moving contact loses its tension, causing the mechanism to lock and the fuse tube to drop, placing the cutout in an open position. During load switching operations, operators use an insulating operating bar to disengage the moving contact. Initially, the main contact and auxiliary static contact remain connected. Continued disengagement leads to separation of the auxiliary contacts, resulting in an electric arc that elongates within the arc-extinguishing enclosure gap. The arc is effectively extinguished as the enclosure releases gas to blow off the arc when the current passes 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 pioneering high-tech enterprise at the forefront of electrical integration. With a dedicated team of professionals in R&D, production, and service, we proudly boast over 15 years of rich industry experience. Our commitment to excellence fuels our innovation and customer-centric approach.
Our distinguished product line features high-voltage solid-state soft starters, capacitor cabinets, versatile high and low voltage switchgear, gas-insulated switchgear, and reliable substations. These products have found widespread application across diverse sectors including energy and chemical industries, metal smelting, electric power grids, industrial manufacturing, esteemed universities and research institutions, medical and pharmaceutical sectors, vibrant municipal commerce, essential water conservancy and hydropower, efficient road traffic management, and thriving commercial and residential areas.
At Zhejiang Chaotai, we are committed to pioneering technological innovation through our "smart manufacturing" philosophy. By actively welcoming top-tier technical talents, we aim to comprehensively enhance our core competitiveness. Our relentless pursuit of the premier industry brand is fueled by delivering unparalleled value to our customers. Since our inception, we've charted an extraordinary journey from modest beginnings to industry excellence, driven by innovation and a steadfast focus on quality, reputation, and efficiency. Our commitment to "technology as the guide, standardized management, excellent quality, and customer satisfaction" is unwavering, enhancing our market competitiveness. We dedicate ourselves to serving China's electric power and grid transmission and distribution fields with ambitious goals of speed, strength, and excellence. Upholding integrity, prioritizing quality, and valuing unmatched service are our guiding principles, with customer satisfaction as our eternal mandate. Our relentless pursuit of excellence, constant innovation, and commitment to building a trusted brand are the pillars of our enduring development vision. Your support and recognition fuel our progress, and we extend heartfelt gratitude to our loyal customers. Zhejiang Chaotai looks forward to forging a bright future together, 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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