Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are paramount solutions for outdoor high-voltage electrical protection, offering unparalleled safety and reliability. These advanced devices are meticulously designed to be strategically placed either on the high-voltage side of distribution transformers or as indispensable links in distribution lines. They provide critical protection against transformer and line short circuits, as well as overloads, while seamlessly managing the opening and co-loading of current. Ingeniously engineered, the drop-out fuse features an insulating bracket and fuse tubes, with static contacts firmly secured at both ends of the bracket and moving contacts precisely attached to the ends of the fuse tube. The fuse tube construction incorporates a state-of-the-art inner arc tube, paired with an outer phenolic paper tube or epoxy glass cloth tube, ensuring robustness and durability. Furthermore, the Pull Load Drop-out Fuse boasts exceptional flexibility, complete with auxiliary contacts and an arc chute, crafted specifically for smooth current load operations.
During routine operations, the drop-out fuse is expertly maintained in a secure closed position with the fuse tube in a state of optimal tension. In the event of a system fault, the fault current immediately triggers the fuse to blow, producing an arc. This arc promptly ignites the arc tube, leading to the decomposition of substantial gas volumes, which in turn creates high pressure inside the tube and generates a vertical wind path. This ingenious mechanism swiftly stretches and elongates the arc. Once the fuse is blown, the moving contact effortlessly releases tension and rotates outwards, allowing the locking mechanism to disengage and the fuse tube to drop, achieving a definitive breaking position. For load pulling, an insulating rod is utilized to expertly pull the moving contact, ensuring it remains in contact with the static contact. With continued exertion, the auxiliary contacts gracefully separate, forming an arc between them that is adeptly stretched within the hood slit. The arc cover, ingeniously designed to contain gas, facilitates the swift extinguishment of the arc as the current approaches zero.
Use and Standards
This exceptional product is meticulously crafted for deployment in 10 to 35KV distribution lines, including branching lines and on the primary side of distribution transformers. It delivers robust protection against overloads and short circuits, while also enabling the efficient separation and combination of the rated load current. Its reliability and performance make it an indispensable asset in any high-voltage distribution network.
The meticulous design of this product strictly adheres to the JB/T8321-1996 Method for AC high-voltage fuse preparation, while its parameters are in full compliance with GB15166.3-1994 high voltage fuses Expulsion fuses standards. In scenarios where standards lack detailed definitions of critical parameters and configurations, precise adjustments are made in accordance with the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses, ensuring utmost precision and reliability in every aspect.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout stand as premier solutions in the realm of outdoor high-voltage protective devices. Masterfully designed to connect with the incoming feeder of distribution transformers or lines, they play a pivotal role in safeguarding transformers and lines from short circuit incidents and overload conditions, while proficiently managing the on/off load current. The drop-out fuse cutout features a robust construction with insulating insulator supports and a fuse tube, complemented by static contacts securely fixed on both sides of the insulator support, and moving contacts adeptly installed at the ends of the fuse tube. This sophisticated fuse tube encompasses an internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube, ensuring top-tier performance. The load switching fuse cutout is further enhanced with reinforced elastic auxiliary contacts and an arc-extinguishing enclosure, guaranteeing efficient on-off load current switching with unparalleled precision and reliability.
In normal operational scenarios, the fuse link plays a vital role, ensuring the fuse tube is precisely tightened to maintain a secure closed position. When faults arise, the fault current acts swiftly, causing the fuse to melt instantly and generate an electric arc. This arc ignites the arc-extinguishing tube, releasing a significant volume of gas, creating high pressure that elongates the arc throughout the tube. Following the melting of the fuse link, the moving contact loses its tension, allowing the mechanism to lock and the fuse tube to drop out, seamlessly switching to an open position. For efficient load switching during cutout, operators must skillfully use 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 further pulled, an electric arc forms between the auxiliary contacts, which gracefully elongates within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to extinguish the arc as the current seamlessly passes through zero, ensuring optimal operational safety and efficiency.
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 excellence in the field of electrical integration. As a pioneering high-tech enterprise, we proudly present a seasoned team in R&D, production, and service, rich with over 15 years of industry expertise. Our commitment to cutting-edge solutions and customer satisfaction marks us as leaders in the electrical industry.
Our diverse and expansive product range encompasses high-voltage solid-state soft starters, capacitor cabinets, both high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and robust substations. These high-performance products are indispensable across various sectors, including the energy and chemical industries, metal smelting, expansive electric power grids, and industrial manufacturing. Esteemed universities and research institutions also rely on our products. Furthermore, we empower the medical and pharmaceutical sectors, support municipal commerce, enhance water conservancy and hydropower projects, optimize road traffic systems, and enrich commercial and residential developments.
Firmly rooted in a commitment to technological innovation and our 'smart manufacturing' philosophy, we are dedicated to attracting top-tier technical talent to enhance our company's core competitive edge. Our mission is to deliver unparalleled value to our clients and to become the most esteemed brand in the industry. Our journey from inception to excellence is marked by relentless innovation and a modern business ethos, emphasizing quality as our lifeline, market orientation, reputation-driven development, and management-driven efficiency. We uphold our commitment to 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' as our guiding principles in quality and technical talent management. Our mission is to serve China's electric power and grid transmission and distribution fields with increasing speed, strength, and ambition. At our core, integrity is non-negotiable, quality is sacrosanct, service reigns supreme, and customer satisfaction is our eternal creed. Our unwavering pursuit of excellence, relentless innovation, and dedication to building a trustworthy brand remain our guiding principles. Your recognition fuels our progress. We extend our heartfelt gratitude to all our loyal clients for their enduring support, and Senhang Technology eagerly anticipates collaborating with you 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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