Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse stand as the pinnacle of outdoor high-voltage electrical protection. Meticulously engineered, these devices are strategically positioned on the high-voltage side of distribution transformers or integrated as pivotal support links in distribution lines. They serve as crucial defenses against transformer and line short circuits and overload circumstances, facilitating the smooth opening and loading of current. Ingeniously crafted, the drop-out fuse consists of an insulating bracket and fuse tubes, with static contacts firmly secured at each end and moving contacts elegantly connected to the ends of the fuse tube. The design of the fuse tube features a sophisticated inner arc tube coupled with a robust outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse distinguishes itself with superior adaptability, incorporating auxiliary contacts and an arc chute meticulously crafted for flawless current load operations.
In standard operational modes, the drop-out fuse is securely locked in a closed stance, with the fuse tube precisely tensioned. Upon detecting system anomalies, the fault current acts promptly, blowing the fuse and generating an arc. This intense arc ignites the arc tube, decomposing substantial gas volumes and generating high pressure within the tube, crafting a vertical wind path that skillfully stretches and elongates the arc. As the fuse blows, the moving contact releases, gracefully rotating outward while the locking mechanism disengages, allowing the fuse tube to drop and reach a definitive breaking position. When load pulling is required, an insulating rod is employed to draw out the moving contact while maintaining connection with the static contact. With continued force application, auxiliary contacts separate, generating an arc between them that stretches within the hood slit. The arc cover efficiently contains the gas, facilitating the effective arc extinguishment as the current reaches zero.
Applications and Compliance Standards
This exceptional product is meticulously designed for utilization in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It offers unwavering protection against overloads and short circuits while enabling effective separation and combination of the rated load current.
The precision-engineered design of this product aligns with the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters correspond with the esteemed GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In instances where detailed definitions are absent, adjustments are crafted 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. Designed with intention, they connect with the incoming feeder of distribution transformers or lines, playing a vital role in safeguarding transformers and lines from short circuit events and overload conditions while expertly managing the on/off load current. The drop-out fuse cutout comprises robust insulating insulator supports and a fuse tube, with static contacts fixed on both sides and moving contacts skillfully installed at the ends of the fuse tube. The fuse tube features an advanced internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also includes enhanced, elastic auxiliary contacts and an arc-extinguishing enclosure for efficient on-off load current switching.
In typical operational scenarios, the fuse link ensures the fuse tube remains tightly closed. Upon encountering faults, the fault current melts the fuse with urgency, generating an electric arc that heats the arc-extinguishing tube, releasing copious gas volumes and creating high pressure to elongate the arc within the tube. Post-melting, 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 further pulled, an electric arc forms between them, elongating within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to efficiently extinguish the arc as the current passes through 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. shines as a paragon of pioneering innovation and unmatched excellence in the realm of electrical integration. As a dynamic high-tech enterprise, we proudly present a team rich with experience in R&D, production, and service, fortified by over 15 years of steadfast dedication and industry expertise.
Our diverse and comprehensive product range includes top-tier high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These superior products are essential assets across a multitude of sectors, serving the energy and chemical industries, metal smelting facilities, extensive electrical power networks, industrial manufacturing domains, as well as renowned universities and research organizations. Moreover, our innovative solutions empower the medical and pharmaceutical sectors, invigorate municipal commerce, enhance water conservation and hydropower initiatives, optimize road traffic systems, and uplift commercial as well as residential developments with unparalleled efficiency and reliability.
Rooted in our steadfast commitment to technological innovation and the ethos of 'smart manufacturing,' we are determined in our pursuit of attracting elite technical talent to robustly amplify our core competitive edge. Our unwavering commitment is to deliver exceptional value to our clients, striving to forge the industry's most esteemed brand. Since our inception, we have consistently advanced, evolving from our origins to a state of excellence. Our journey is charted by innovation and sustained through a modern business ethos, where quality serves as our lifeblood, market orientation is pivotal, reputation-driven expansion is crucial, and efficiency is achieved through strategic management. We adhere rigorously to the guiding principles of 'technology as the compass, standardized management, exceptional quality, and customer satisfaction' in our quality and technical talent management, diligently expanding our market stature. Our mission is to serve China's electric power and grid transmission and distribution sectors with enhanced speed, strength, and ambition. At our foundation, integrity is immutable, quality is sacrosanct, service reigns supreme, and customer satisfaction is our eternal vow. Our continuous pursuit of excellence, perpetual innovation, and dedication to building a trustworthy brand are our guiding tenets. Your recognition fuels our progress. We profoundly thank all our loyal clients for their enduring support, and Senhang Technology looks forward with anticipation to partnering with you in crafting 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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