Product Description
Comprehensive Overview
Elevate your power systems with the unparalleled performance of the Drop-out Fuse and Pull Load Drop-out Fuse, the gold standard for outdoor high-voltage electrical protection. Engineered with precision, these devices are strategically positioned on the high-voltage side of distribution transformers or incorporated within distribution lines as essential support links. They serve as crucial defenders against transformer and line short circuits and overload conditions, ensuring flawless current loading and unloading operations. Ingeniously designed, the drop-out fuse features an insulating bracket and fuse tubes, with steadfast static contacts at each end and smoothly moving contacts at the ends of the fuse tube. Its construction boasts a sophisticated inner arc tube combined with a robust outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse is distinguished by its enhanced flexibility, equipped with auxiliary contacts and an arc chute, meticulously crafted for seamless current load operations.
During standard operations, the drop-out fuse is firmly locked in a closed position, with the fuse tube perfectly tensioned. When system faults are detected, the fault current acts with precision, blowing the fuse and initiating an arc. This dynamic arc ignites the arc tube, decomposing substantial gas volumes and creating high pressure inside the tube to form a vertical wind path, skillfully elongating the arc. As the fuse blows, the moving contact releases, gracefully rotating outwards, and the locking mechanism disengages, enabling the fuse tube to drop and achieve a decisive breaking position. For essential load pulling, an insulating rod is utilized to draw out the moving contact while maintaining a connection with the static contact. With continued force application, auxiliary contacts disengage, forming an arc between them that stretches within the hood slit. The arc cover adeptly contains the gas, promoting efficient arc extinguishment as the current reaches zero.
Applications and Compliance Standards
Meticulously crafted for excellence, this prestigious product is specifically designed for use in 10 to 35KV distribution lines, branching lines, and the primary side of distribution transformers. It delivers unwavering protection against overloads and short circuits while facilitating the efficient separation and combination of the rated load current.
With precision engineering at its core, this product meets the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation standards. Its parameters are perfectly aligned with the prestigious GB15166.3-1994 standards for high voltage expulsion fuses. In cases where detailed definitions are absent, modifications are expertly 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 stand as leading outdoor high-voltage protective devices. Intentionally designed to connect with the incoming feeder of distribution transformers or lines, they play a vital role in safeguarding transformers and lines from short circuit incidents and overload conditions while efficiently managing the on/off load current. The drop-out fuse cutout includes robust insulating insulator supports and a fuse tube, with static contacts fixed on both sides and moving contacts expertly installed at the ends of the fuse tube. Its 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 incorporates enhanced, flexible auxiliary contacts and an arc-extinguishing enclosure for effective on-off load current switching.
In typical operational scenarios, the fuse link ensures the fuse tube remains securely closed. Upon encountering faults, the fault current swiftly melts the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing substantial gas volumes and creating high pressure to elongate the arc within the tube. After melting, the moving contact loses tension, allowing the mechanism to lock and the fuse tube to drop out, transitioning to an open position. For cutout load switching, operators employ 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 drawn, an electric arc forms between them, elongating within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to effectively 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. is a shining example of innovation and excellence within the realm of electrical integration. We are a dynamic high-tech enterprise with a seasoned R&D, production, and service team, boasting over 15 years of steadfast dedication and expertise. Our commitment to breaking new ground in the industry is unwavering.
Our extensive lineup showcases high-voltage solid-state soft starters, advanced capacitor cabinets, both high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These premium products are essential across various sectors, from energy and chemical industries, metal smelting operations, and vast electrical power grids, to industrial manufacturing and esteemed universities and research institutions. Moreover, our solutions empower the medical and pharmaceutical domains, support municipal commerce, enhance water conservation and hydropower initiatives, optimize road traffic systems, and elevate both commercial and residential developments.
Rooted in a steadfast commitment to technological innovation and the ethos of 'smart manufacturing,' we are dedicated to attracting elite technical talent to significantly bolster our core competitive advantage. Our mission is to deliver unparalleled value to our clients and to forge the most esteemed brand in the industry. Since our inception, we have relentlessly advanced from conception to mastery. Our journey is driven by innovation and sustained by a contemporary business philosophy, where quality is our lifeline, market orientation is crucial, reputation-fueled growth is vital, and efficiency is achieved through strategic management. We adhere to the guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality assurance and talent management practices, diligently working to expand our market footprint. Our mission is to serve China's electric power and grid transmission and distribution sectors with increasing speed, strength, and ambition. We uphold integrity as non-negotiable, quality as sacrosanct, service as paramount, and customer satisfaction as our enduring mantra. Our unyielding pursuit of excellence, continuous innovation, and dedication to building a reliable brand remain our guiding lights. Your recognition fuels our progress. We express our deepest gratitude to all our loyal clients for their unwavering support, and Senhang Technology eagerly looks forward to 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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