Product Description
General
The drop-out fuse and load switch drop-out fuse are vital outdoor high-voltage protective devices. These fuses are strategically positioned on the high-voltage side of distribution transformers or as part of the distribution line links, providing robust protection against short circuits and overloads. The design includes an insulating bracket with static contacts at each end and a fuse tube, which comprises an inner arc tube and an outer phenolic paper or epoxy glass cloth tube. The pull load drop-out fuse is enhanced with flexible auxiliary contacts and an arc chute, optimizing its functionality for open and load current conveyance.
During regular operations, the fuse tube remains tightly sealed through fuse tension. In the event of a failure, the fault current swiftly blows the fuse, forming an arc. The arc tube, heated by the arc, releases a large volume of gas, creating high pressure that forces the arc to rapidly elongate and extinguish. Post fuse blowout, the moving contact loses tension, activating the locking mechanism to release the fuse tube and establish an open circuit. For load disconnection, use an insulating rod to disengage the moving contact. Initially, the moving and static contacts remain connected; further pulling separates the auxiliary contacts, creating an arc that extends into the hood slit where it is safely extinguished when the current reaches zero.
Use and Standards
This highly efficient product is engineered for 10 ~ 35KV distribution line branch circuits and primary sides of distribution transformers. It is perfect for overload and short circuit protection, adeptly separating and combining rated load currents.
This product adheres to various esteemed standards: the product model follows JB/T8321-1996 for AC high-voltage fuses, while parameters are designed in accordance with GB15166.3-1994 for high voltage expulsion fuses. Although certain key parameters and configurations may lack clear definition, they are subject to amendments based on JB/DQ2139-1986 standards for 10 ~ 35KV outdoor high voltage drop fuses, ensuring precise technological requirements.
The drop-out fuse cutout, along with the load switching fuse cutout, are essential outdoor high voltage protective devices. They connect with the incoming feeder of distribution transformers or lines to safeguard against short circuits, overloads, and facilitate on/off loading currents. Constructed with insulator supports and a fuse tube, static contacts are mounted on the support's ends, while the moving contact connects the fuse tube's ends. The tube features an inner arc-extinguishing component and an outer phenolic compound paper or epoxy glass tube. The load switching fuse cutout is equipped with resilient auxiliary contacts and an arc-extinguishing enclosure to ensure efficient current switching.
Under standard conditions, the fuse link holds the fuse tube in a secure closed position. Should faults arise, the fault current will melt the fuse link immediately, causing an electric arc that heats the arc-extinguishing tube, releasing significant gas pressure to extinguish the arc. Once the fuse link melts, the moving contact loses tension, activating the lock mechanism and causing the fuse tube to drop, thus opening the circuit. During load switching, operators should use an insulating bar to pull the moving contact; initially, the main and auxiliary contacts remain engaged. As pulling continues, the auxiliary contacts separate, producing an arc that elongates within the arc-extinguishing enclosure, which then expels gas to extinguish the arc when 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. stands at the forefront of innovation as a high-tech enterprise dedicated to mastering the art of electrical integration. With an illustrious history spanning over 15 years, our seasoned team of R&D experts, skilled production specialists, and attentive service professionals work in unison to deliver unparalleled solutions that meet the dynamic needs of the industry.
Our diverse product portfolio features cutting-edge high-voltage solid-state soft starters, versatile capacitor cabinets, sophisticated high and low voltage switchgear, advanced gas-insulated switchgear, and robust substations. These revolutionary products find applications across a vast array of sectors, including energy and chemical industries, metal smelting, and electric power grids. Our reach extends to industrial manufacturing, esteemed universities, research institutions, the medical and pharmaceutical sectors, as well as municipal commerce. Our expertise also enhances water conservancy, hydropower, road traffic management, and both commercial and residential infrastructures.
Guided by the principles of technological innovation and our 'smart manufacturing' ethos, we relentlessly pursue excellence by recruiting top-tier technical talent. This strategic approach amplifies our core competitiveness, enabling us to deliver exceptional value to our customers while crafting the most esteemed brand in the industry. Our journey embodies transformation—from inception to innovation, and from innovation to excellence. We embrace a modern business philosophy rooted in quality, reputation, and efficient management to ensure our market leadership. Committed to using technology as our guiding light, we uphold rigorous standards in management and quality, fortifying our market position. Our tireless pursuit of advancing China's electric power and grid transmission and distribution fields drives us to exceed our goals with unmatched speed, strength, and ambition. Our ethos places integrity as essential, quality as fundamental, service as supreme, and customer satisfaction as the core of our mission. Our steadfast commitment to excellence, relentless innovation, and brand integrity fuels our growth aspirations. We extend heartfelt gratitude to our loyal customers old and new, whose support propels us forward. At Senhang Technology, we eagerly anticipate collaborating to forge a brighter future together.
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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