Product Description
General
The drop-out fuse and pull load drop-out fuse are robust outdoor high-voltage electrical protection devices. Installed on the high-voltage side of distribution transformers or within the distribution line's support link, they offer exceptional protection against transformer and line short circuits, overloads, and facilitate the opening and closure of co-load currents. Crafted from an insulating bracket and durable fuse tubes, these fuses feature static contacts at each end of the bracket and moving contacts on the fuse tube ends. The fuse tubes are ingeniously constructed with an inner arc tube and an outer layer made from phenolic paper or epoxy glass cloth tubes. The pull load drop-out fuse enhances flexibility with its auxiliary contacts and arc chute, ensuring efficient opening and closing of co-load currents.
During normal operations, the fuse tube and tensioned fuse form a secure closed position. When a system fault occurs, the fault current quickly causes the fuse to blow, generating an arc. This arc decomposes in the tube, releasing a substantial amount of gas, which creates high pressure and vertical wind along the pipeline, rapidly stretching and elongating the arc. Once the fuse blows, the moving contact loses tension and disengages, activating the locking mechanism to release the fuse tube, allowing it to drop and form a breaking position. For load pulling, an insulating rod is used to manipulate the moving contact. Initially, the moving and static contacts remain in contact. Continued pulling separates the auxiliary contacts, where an arc forms between them, stretching within the hood slit and surrounded by gas. As the current reaches zero, the arc extinguishes.
Use and Standards
This versatile product is indispensable in 10 ~ 35KV distribution line branches and on the primary side of distribution transformers. It provides unmatched overload and short circuit protection, and it seamlessly separates and combines the rated load current, ensuring stability and reliability in your electrical systems.
Our product model is expertly prepared following the JB/T8321-1996 Method for AC high-voltage fuses. We adhere to the GB15166.3-1994 standards for high voltage expulsion fuses, although these standards don't explicitly define key parameters and configurations. We make corrections according to JB/DQ2139-1986 interim technology requirements for 10 ~ 35KV outdoor high voltage drop fuses.
The drop-out fuse cutout and load switching fuse cutout are premium outdoor high voltage protective devices. Designed for connection with the incoming feeder of distribution transformers or distribution lines, they play a crucial role in safeguarding transformers and lines from short circuits and overloads, while efficiently managing the on/off current loading. The cutout consists of insulating insulator supports and a fuse tube, with static contacts fixed on the insulator supports' sides and moving contacts on the fuse tube's ends. The fuse tube boasts an inner arc-extinguishing tube and an outer layer of phenolic compound paper or epoxy glass. The load switching fuse cutout is enhanced with enforced elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring seamless on-off loading current management.
In standard operations, the fuse link is securely tightened, fixing the fuse tube in a closed position. Should system faults arise, the fault current promptly melts the fuse, generating a powerful electric arc. This heats the arc-extinguishing tube, causing it to release significant gas amounts, resulting in high pressure and arc elongation along the tube. After the fuse link melts, the moving contact loses its tightened strength, locking the mechanism and dropping the fuse tube, thus placing the cutout in an open position. When switching off during cutout loading is necessary, the operator uses an insulating operating bar to manipulate the moving contact. Initially, the main and auxiliary static contacts remain engaged. As the auxiliary contact is pulled, an electric arc forms and lengthens in the arc-extinguishing enclosure gap, with the generated gas quickly extinguishing the arc as the current nears 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 luminary in the high-tech realm, specializing in cutting-edge electrical integration. With a formidable team in research, development, production, and service, we bring over 15 years of unparalleled industry expertise to our discerning clientele.
Our impressive product portfolio features high-voltage solid-state soft starters, capacitor cabinets, sophisticated high and low voltage switchgear, advanced gas-insulated switchgear, and state-of-the-art substations. These innovative solutions find application across a myriad of sectors including energy and chemical industries, metal smelting, the robust electric power grids, industrial manufacturing, prestigious universities, and research institutions. Additionally, our products serve the needs of the medical and pharmaceutical realms, municipal commerce, water conservancy and hydropower sectors, road traffic systems, as well as commercial and residential developments.
At the heart of Zhejiang Chaotai's ethos is an unwavering commitment to technological innovation and a pioneering 'smart manufacturing' philosophy. We actively recruit top-tier technical talent to significantly bolster our core competencies, ensuring that we deliver unparalleled value and service to our esteemed clients. Our journey from inception has been one of remarkable evolution—transforming from modest beginnings to achieving excellence and acclaim. We steadfastly adhere to a philosophy where quality ensures survival, market dynamics drive growth, reputation fosters development, and astute management boosts efficiency. Our guiding principles of 'technology-driven innovation, standardized management, superior quality, and unwavering customer satisfaction' propel us to reinforce our market dominance. We passionately serve the transmission and distribution sectors of China's electric power and grid with ambitions that are faster, stronger, and loftier. Integrity is our foundation, quality our hallmark, service our creed, and customer satisfaction our eternal pursuit. With a relentless drive for excellence and continuous innovation, we are committed to crafting a brand that commands trust and respect. Your acknowledgment fuels our ambition. We extend heartfelt gratitude to both new and long-standing customers for their steadfast support. Together with Senhang Technology, we eagerly anticipate forging a brighter future hand in hand with you.
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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