Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage electrical safeguarding. Engineered with meticulous precision, these devices find their strategic placement on the high-voltage side of distribution transformers or as pivotal support links in distribution lines. They serve as crucial defenders against transformer and line short circuits, overload conditions, and support the seamless opening and loading of current. Crafted with exceptional ingenuity, the drop-out fuse consists of an insulating bracket and fuse tubes, featuring static contacts securely positioned at each end alongside moving contacts elegantly connected to the ends of the fuse tube. The construction of the fuse tube boasts 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 enhanced adaptability, showcasing auxiliary contacts and an arc chute meticulously crafted for smooth current load operations.
Under standard operating conditions, the drop-out fuse remains firmly locked in a closed position, with the fuse tube precisely tensioned. Upon fault detection, the fault current acts promptly, blowing the fuse and generating an arc. This potent arc ignites the arc tube, causing large gas volumes to decompose and produce high pressure within the tube, creating a vertical wind path that effectively elongates and stretches the arc. As the fuse blows, the moving contact releases, rotating gracefully outward while the locking mechanism disengages, allowing the fuse tube to drop and assume a decisive breaking position. When load pulling is required, an insulating rod is employed to draw out the moving contact while maintaining a connection with the static contact. With continuous application of force, auxiliary contacts disengage, producing an arc between them that stretches within the hood slit. The arc cover skillfully contains the gas, promoting efficient arc extinguishment as the current reaches zero.
Applications and Compliance Standards
This distinguished product is meticulously engineered for deployment in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It delivers 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 adheres to the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters align with the prestigious GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In instances where detailed definitions are absent, adjustments are crafted according to 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 champions. Purposefully engineered to connect with the incoming feeder of distribution transformers or lines, they play a vital role in shielding transformers and lines from short circuit events and overload conditions while adeptly managing the on/off load current. The drop-out fuse cutout features robust insulating insulator supports and a fuse tube, with static contacts securely fixed on both sides and moving contacts expertly mounted at the ends of the fuse tube. The fuse tube boasts a sophisticated internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also integrates 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 securely closed. Upon encountering faults, the fault current rapidly melts the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing significant gas volumes and producing 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. is a shining star of innovation and excellence in electrical integration. As a dynamic high-tech enterprise, we proudly present a seasoned R&D, production, and service team, armed with over 15 years of dedicated expertise.
Our extensive product lineup includes high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These elite products are vital across numerous sectors, powering the energy and chemical industries, metal smelting, expansive electrical power grids, industrial manufacturing, and esteemed universities and research institutions. Moreover, our solutions invigorate the medical and pharmaceutical fields, bolster municipal commerce, enhance water conservation and hydropower projects, optimize road traffic systems, and elevate both commercial and residential developments.
Rooted in a commitment to technological innovation and 'smart manufacturing,' we are dedicated to attracting top-tier talent to amplify our core strengths. Our mission is to deliver unparalleled value to clients and create the industry's most esteemed brand. Our journey is marked by relentless progress and innovation, supported by a modern business ethos where quality, market orientation, reputation-driven growth, and strategic management are paramount. We adhere to the guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and talent management, striving to expand our market reach. Our goal is to serve China's electric power and grid transmission and distribution sectors with increased speed and ambition. At our core, integrity, quality, and service are sacred, and customer satisfaction is our eternal commitment. Our pursuit of excellence and brand trustworthiness drives us forward. We express sincere gratitude to our loyal clients for their support, and Senhang Technology looks forward to partnering with you for a brighter future.
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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