Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage electrical protection solutions. Engineered with precision, these devices are strategically placed on the high-voltage side of distribution transformers or utilized as vital support components within distribution lines. They are indispensable for providing robust protection against transformer and line short circuits and overload conditions, while also streamlining the process of opening and combining currents. The drop-out fuse is a marvel of design, featuring an insulating bracket and ingenious fuse tubes, with static contacts securely attached at both ends of the bracket and dynamic contacts connected to the fuse tube's extremities. The fuse tube's construction is nothing short of innovative, incorporating an internal arc tube combined with an outer layer of phenolic paper or epoxy glass cloth. The Pull Load Drop-out Fuse takes versatility to the next level with its auxiliary contacts and arc chute, expertly crafted for flawless current load operations.
In standard operational modes, the drop-out fuse is expertly locked in a closed position through the tensioning of the fuse tube. Upon the advent of system faults, the fault current rapidly melts the fuse, initiating an arc. This arc acts as a catalyst, igniting the arc tube, which then decomposes to release substantial gas volumes, creating high internal pressure and generating a vertical wind path. This incredible mechanism efficiently stretches and elongates the arc. Once the fuse melts, the mobile contact loses tension, rotating outwards as the locking mechanism releases, allowing the fuse tube to drop and transition into a breaking position. For load pulling, an insulating rod is employed to maneuver the moving contact while maintaining its engagement with the static contact. As efforts persist, the auxiliary contacts separate, forming an arc that elongates within the hood slit. The arc cover, designed to contain gas, acts effectively in extinguishing the arc as the current diminishes to zero.
Use and Standards
This exceptional product is meticulously crafted for deployment within 10 to 35KV distribution lines, encompassing branching lines and the primary side of distribution transformers. It provides formidable protection against overloads and short circuits, while also facilitating the seamless separation and unification of rated load currents with unmatched efficiency.
The intricate design of this product is in strict alignment with the JB/T8321-1996 standards for AC high-voltage fuse preparation, while its specifications are fully compliant with the GB15166.3-1994 high-voltage fuses Expulsion fuses standards. In scenarios where standards do not comprehensively define critical parameters and configurations, meticulous adjustments are made in accordance with the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses, ensuring unrivaled product excellence.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are at the forefront of outdoor high-voltage protective technology. Expertly designed to integrate with the incoming feeders of distribution transformers or lines, they play a vital role in shielding transformers and lines from short circuit scenarios and overload conditions, while effectively managing on/off load current operations. The drop-out fuse cutout is a sophisticated combination of insulating insulator supports and a fuse tube, with static contacts firmly fixed on either side of the insulator support and mobile contacts adeptly positioned at the ends of the fuse tube. The fuse tube itself is a feat of engineering, featuring an internal arc-extinguishing tube complemented by an outer layer of phenolic compound paper or epoxy glass. The load switching fuse cutout is enhanced with robust elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring efficient on-off load current switching with unparalleled precision.
In normal operational environments, the fuse link functions to ensure the fuse tube remains securely tightened in a closed position. Upon the occurrence of faults, the fault current induces the fuse to melt instantly, generating an arc. This phenomenon causes the arc-extinguishing tube to heat up and emit a substantial volume of gas, creating high pressure that elongates the arc throughout the tube. Once the fuse link has melted, the mobile contact loses tension, enabling the mechanism to unlock and the fuse tube to drop out, transitioning to an open position. During load switching cutout operations, operators employ an insulating operating bar to deftly pull the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact is further manipulated, an electric arc materializes between the auxiliary contacts, stretching within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism expels gas to effectively extinguish the arc as the current approaches zero, ensuring safe and reliable operation.
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 paragon of modern innovation and unrivaled excellence within the dynamic world of electrical integration. As a vibrant high-tech enterprise, we are proud to present our seasoned team of R&D, production, and service experts, who collectively bring over 15 years of invaluable industry expertise to the table.
Our comprehensive portfolio showcases a spectrum of high-performance products, including high-voltage solid-state soft starters, capacitor cabinets, versatile high and low voltage switchgear, advanced gas-insulated switchgear, and robust substations. These products are indispensable to a vast array of sectors, such as the energy and chemical industries, metal smelting operations, expansive electric power grids, industrial manufacturing, and prestigious universities and research institutions. Furthermore, our solutions are pivotal in empowering the medical and pharmaceutical industries, strengthening municipal commerce, enhancing water conservancy and hydropower projects, optimizing road traffics systems, and enriching both commercial and residential developments.
Firmly rooted in our unwavering commitment to technological advancement and the ethos of 'smart manufacturing,' we dedicate ourselves to attracting elite technical talent to comprehensively enhance our company's competitive edge. Our fervor for delivering unmatched value to clients fuels our ambition to build the most revered brand in the industry. From our founding, we have relentlessly pursued excellence, with a journey marked by innovation, and sustained by a contemporary business ethos. Quality is our lifeline, market orientation our compass, reputation-driven growth our path, and management-driven efficiency our engine. We adhere strictly to our guiding principles: 'technology as the guide, standardized management, outstanding quality, and customer satisfaction.' These tenets shape our quality and technical talent management, and our ongoing efforts to expand our market presence. Our mission is to serve China's electric power and grid transmission and distribution sectors with increasing speed, strength, and ambition. At our core, integrity is non-negotiable, quality is sacrosanct, service is paramount, and customer satisfaction is our eternal creed. The unwavering pursuit of excellence, relentless innovation, and dedication to building a trustworthy brand are the principles that guide us. Your recognition propels us forward. We extend our deepest gratitude to all our loyal clients for their steadfast support and look forward to collaborating with Senhang Technology to forge an even 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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