Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse epitomize outdoor high-voltage electrical protection with unrivaled precision. Strategically positioned on the high-voltage side of distribution transformers or as crucial support links in distribution lines, these devices are paramount in safeguarding against transformer and line short circuits and overload conditions. They also facilitate seamless opening and loading of current. Ingeniously crafted, the drop-out fuse consists of an insulating bracket and fuse tubes, with static contacts firmly affixed at each end and moving contacts elegantly embedded at the ends of the fuse tube. The construction features a sophisticated inner arc tube combined with a durable outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse distinguishes itself with enhanced flexibility, boasting auxiliary contacts and a meticulously designed arc chute for smooth current load operations.
In standard operations, the drop-out fuse is securely locked in a closed position with the fuse tube precisely tensioned. Upon detecting system faults, the fault current acts swiftly to blow the fuse, thereby generating an arc. This powerful arc ignites the arc tube, decomposing large gas volumes and producing high pressure within, creating a vertical wind path that effectively stretches and elongates the arc. As the fuse blows, the moving contact releases, rotating gracefully outwards while the locking mechanism disengages, allowing the fuse tube to drop and achieve a decisive breaking position. When load pulling is necessary, an insulating rod is utilized to draw out the moving contact while maintaining its connection with the static contact. With continued force, auxiliary contacts separate, generating an arc between them that stretches within the hood slit. The arc cover contains the gas, facilitating efficient arc extinguishment as the current diminishes to zero.
Applications and Compliance Standards
This illustrious product is meticulously engineered for deployment in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It provides 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 rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters are in harmony with the esteemed GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In instances where detailed definitions are lacking, 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 stand as premier outdoor high-voltage protective devices. Intentionally engineered to connect with the incoming feeder of distribution transformers or lines, they play an indispensable role in shielding transformers and lines from short circuit incidents and overload conditions while masterfully managing the on/off load current. The drop-out fuse cutout comprises robust insulating insulator supports and a fuse tube, with static contacts precisely fixed on both sides and moving contacts expertly installed at the ends of the fuse tube. The fuse tube features a sophisticated internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also incorporates 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 remarkable speed, 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. 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 draw 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, extending within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to efficiently extinguish the arc as the current traverses 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. stands as an illustrious beacon of groundbreaking innovation and unmatched excellence within the sphere of electrical integration. As a dynamic high-tech enterprise, we are proud to present a highly experienced R&D, production, and service team, empowered by over 15 years of dedicated expertise in the industry. Our legacy is built upon a foundation of unwavering dedication, setting new standards of excellence.
Our expansive product range is a testament to our commitment to quality and innovation, featuring high-voltage solid-state soft starters, sophisticated capacitor cabinets, both high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These premium products are indispensable across a multitude of sectors, serving the energy and chemical industries, metal smelting operations, vast electrical power grids, and industrial manufacturing. Our solutions enrich prestigious universities, research institutions, and further energize the medical and pharmaceutical fields. We support municipal commerce, enhance water conservation and hydropower projects, optimize road traffic systems, and elevate both commercial and residential developments with our cutting-edge solutions.
Anchored by a firm commitment to technological innovation and the philosophy of 'smart manufacturing,' we are resolute in attracting top-tier technical talent to comprehensively enhance our core competitive advantage. Our unwavering dedication is to deliver unmatched value to our clients, as we aspire to create the industry’s most revered brand. From our inception, we have embarked on a journey of relentless progress, evolving from conception to excellence. Our path is paved with innovation and sustained by a modern business ethos, where quality is our lifeline, market orientation is key, reputation-driven growth is paramount, and efficiency is realized through strategic management. We steadfastly adhere to the guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and technical talent management, working diligently 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 inviolable, service is sovereign, and customer satisfaction is our perennial creed. Our relentless pursuit of excellence, constant innovation, and commitment to building a trustworthy brand remain our guiding principles. Your recognition propels our progress, and we extend our heartfelt gratitude to all our loyal clients for their enduring support. Senhang Technology eagerly anticipates partnering with you to shape 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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