Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are exceptionally engineered solutions for outdoor high-voltage electrical protection. These devices find their strategic placement on the high-voltage side of distribution transformers or as indispensable components in distribution lines. They are paramount in safeguarding against transformer and line short circuits, overload conditions, and facilitating the seamless opening and co-loading of current. Ingeniously designed, the drop-out fuse features an insulating bracket and fuse tubes, with static contacts securely affixed at both ends of the bracket and moving contacts attached to the ends of the fuse tube. The construction comprises an inner arc tube paired with an outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse offers enhanced operational flexibility with auxiliary contacts and an arc chute, meticulously designed for flawless current load operations.
In regular operations, the drop-out fuse is maintained in a secure closed position with the fuse tube tensioned. Upon encountering a system fault, the fault current promptly blows the fuse, producing an arc. This arc initiates the arc tube, leading to the decomposition of substantial gas volumes, which create high pressure within the tube, establishing a vertical wind path. This extraordinary mechanism effectively stretches and elongates the arc. Following the fuse's blowout, the moving contact releases tension and rotates outward as the locking mechanism disengages, allowing the fuse tube to drop and achieve a breaking position. To pull the load, an insulating rod is utilized to pull the moving contact, maintaining engagement with the static contact. With continued effort, the auxiliary contacts separate, creating an arc between them that stretches within the hood slit. The arc cover, containing gas, facilitates arc extinguishment as the current approaches zero.
Use and Standards
This distinguished product is expertly designed for deployment in 10 to 35KV distribution lines, encompassing branching lines and on the primary side of distribution transformers. It provides robust defense against overloads and short circuits while enabling efficient separation and combination of the rated load current.
The meticulous design of this product adheres to the JB/T8321-1996 Method for AC high-voltage fuse preparation, while product parameters align with GB15166.3-1994 high voltage fuses Expulsion fuses standards. In instances where standards lack detailed definitions of critical parameters and configurations, adjustments are made in accordance with the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are premier outdoor high-voltage protective devices. Expertly designed to connect with the incoming feeder of distribution transformers or lines, they play a crucial role in safeguarding transformers and lines against short circuit incidents and overload conditions while adeptly managing the on/off load current. The drop-out fuse cutout consists of insulating insulator supports and a fuse tube, with static contacts firmly fixed on both sides of the insulator support and moving contacts installed at the ends of the fuse tube. The fuse tube features an internal arc-extinguishing tube along with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is further augmented with enforced elastic auxiliary contacts and an arc-extinguishing enclosure for efficient on-off load current switching.
Under normal operational scenarios, the fuse link ensures the fuse tube is securely tightened to maintain a closed position. Upon the occurrence of faults, the fault current causes the fuse to melt instantly, generating an electric arc. This heats the arc-extinguishing tube, releasing substantial gas volumes, creating high pressure, and elongating the arc throughout the tube. After the fuse link melts, the moving contact loses tension, enabling the mechanism to lock and the fuse tube to drop out, transitioning to an open position. For cutout load switching, operators utilize an insulating operating bar to pull the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact is progressively pulled, an electric arc forms between the auxiliary contacts, elongating within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to extinguish the arc as 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 as a beacon of innovation and unparalleled excellence within the electrical integration landscape. As a forward-thinking high-tech enterprise, we are proud to house a seasoned team dedicated to R&D, production, and service, backed by over 15 years of profound industry expertise.
Our comprehensive array of products includes cutting-edge high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and robust substations. These high-performance solutions are critical across various sectors, including the dynamic energy and chemical industries, metal smelting, expansive electric power grids, and industrial manufacturing. We proudly support prestigious universities and research institutions, while our innovative solutions invigorate the medical and pharmaceutical fields. Moreover, we enhance municipal commerce, water conservancy, and hydropower projects, optimize road traffic systems, and enrich both commercial and residential developments.
Guided by an unwavering commitment to technological innovation and our ethos of 'smart manufacturing,' we strive to attract leading technical talent, enhancing our core competitive edge holistically. Our dedication to delivering exceptional value to our clients fuels our ambition to establish the most esteemed brand within the industry. Our journey from inception to excellence is marked by relentless progress, driven by a modern business ethos that places quality as our lifeline, guided by market orientation, reputation-driven development, and management-driven efficiency. We firmly uphold our guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and technical talent management, diligently working to strengthen our market presence. Our mission is to serve China's electric power and grid transmission and distribution fields with unmatched speed, strength, and ambition. At our core, integrity is non-negotiable, quality is sacred, service is paramount, and customer satisfaction is our eternal credo. Our relentless pursuit of excellence, unwavering dedication to innovation, and commitment to building a trustworthy brand guide us forward. Your recognition is the driving force behind our progress. We extend our heartfelt gratitude to all loyal clients for their enduring support, and Senhang Technology eagerly looks forward to collaborating with you in forging 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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