Product Description
General
The drop-out fuse, an essential outdoor high-voltage protector, is crucial for safeguarding electrical systems by being strategically installed on the high-voltage side of distribution transformers or serving as a vital support link in distribution lines. Its primary functions include providing short circuit and overload protection for transformers and lines, alongside managing load currents effectively. Constructed with an insulating bracket, the fuse features static contacts mounted at both bracket ends and moving contacts affixed to each end of the fuse tube. The fuse tube comprises an inner arc-extinguishing tube encased in either a phenolic paper tube or an epoxy glass cloth tube. This innovative pull-load drop-out fuse design boasts auxiliary contacts and an arc chute, significantly enhancing flexibility and capacity for handling load currents.
Under normal operation, the drop-out fuse maintains a closed position through the fuse tube's tension. During system failures, the fault current swiftly blows the fuse, creating an arc. The arc burns the arc tube, releasing abundant gases under high pressure, resulting in a vertical wind along the pipeline that rapidly extends the arc. Once the fuse blows, the moving contact loses tension, triggering the locking mechanism to release the fuse tube, which then drops, creating a breaking position. To pull the load, one utilizes an insulating rod to disengage the moving contact. Initially, the static and moving contacts remain engaged; however, continuous pulling separates the auxiliary contacts, forming an arc between them. This arc elongates within the hood's slit, where arc-extinguishing gas effectively quenches it upon current cessation.
Use and Standards
This versatile product is specifically engineered for use in 10 ~ 35KV distribution line branches and primary sides of distribution transformers. It provides robust protection against overloads and short circuits, facilitating the seamless separation and combination of rated load currents.
The product model adheres to the JB/T8321-1996 standards for type AC high-voltage fuses. Parameters are meticulously crafted following the GB15166.3-1994 high voltage expulsion fuses standards. Although these standards do not explicitly define all critical parameters and configurations, adjustments are made in accordance with JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses, ensuring compliance with interim technological specifications.
Designed as an outdoor high-voltage protective device, the drop-out fuse cutout and load switching fuse cutout are indispensable for connection with incoming feeders of distribution transformers or lines. They serve to protect transformers or lines from short circuits and overloads while facilitating on/off loading of current. The cutout is constructed with insulating supports and a fuse tube, featuring static contacts fixed on both sides of the supports and moving contacts installed at each end of the fuse tube. The fuse tube comprises an inner arc-extinguishing tube, encased in an outer phenolic compound paper tube or epoxy glass tube. Load switching fuse cutouts include enforced elastic auxiliary contacts and an arc-extinguishing enclosure that efficiently manages on-off loading currents.
In regular operation, the fuse link secures the fuse tube in a closed position. Upon system faults, the resultant fault current swiftly melts the fuse link, generating an electric arc. This arc heats the arc-extinguishing tube, causing an explosive gas release that creates high pressure and a downward flow along the tube. Once the fuse link melts, the moving contact loses its tension, locking the mechanism and allowing the fuse tube to drop, thus opening the cutout. For switching off load during cutout operation, the operator uses an insulating operating bar to pull the moving contact. Initially, the main and auxiliary static contacts remain engaged, but further pulling separates them, forming an electric arc between the auxiliary contacts. This arc extends within the arc-extinguishing enclosure, where gas discharges effectively extinguish it as 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. stands proudly as a beacon of high technology in the realm of electrical integration. With an illustrious legacy of over 15 years, our esteemed enterprise is fortified by a team of expert R&D professionals, dedicated production specialists, and unrivaled service providers.
Our extensive product lineup showcases the pinnacle of innovation, encompassing high-voltage solid-state soft starters, cutting-edge capacitor cabinets, versatile high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and robust substations. These groundbreaking products power a myriad of sectors, including dynamic energy and chemical industries, pioneering metal smelting, crucial electric power grids, advanced industrial manufacturing, prestigious universities and research institutions, progressive medical and pharmaceutical sectors, vital municipal commerce, essential water conservancy and hydropower, expansive road traffic systems, and thriving commercial and residential areas, ensuring unmatched reliability and excellence.
Adhering to a philosophy of relentless innovation and 'smart manufacturing,' we passionately attract top-tier technical talents to significantly boost our core competencies. Our unwavering commitment to offering unparalleled customer service is matched only by our determination to establish ourselves as the industry's leading brand. Our journey from humble beginnings to industry excellence underscores our dedication to continuous improvement. We steadfastly pursue innovation, anchored by the principles of quality assurance, market awareness, reputational growth, and management-driven efficiency. Our ethos—'technology as the guide, standardized management, exceptional quality, and customer satisfaction'—underpins our strategic management and technical prowess, enhancing our competitive edge in the market. As we aim to elevate China's electric power and grid transmission to unprecedented heights with speed, strength, and ambition, our core values of integrity, supreme quality, exceptional service, and unwavering customer satisfaction remain our guiding principles. Persevering in our quest for excellence, we embrace innovation and strive to cultivate a brand synonymous with trustworthiness. Your trust fuels our resolve. We extend our heartfelt appreciation to all our loyal customers for their steadfast support. Senhang Technology eagerly anticipates forging a shared future with you, 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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