Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse stand as the epitome of outdoor high-voltage electrical safeguarding. Positioned with precision on the high-voltage side of distribution transformers or strategically integrated within distribution lines, these devices serve as pivotal sentinels. They protect against perilous transformer and line short circuits, effectively manage overload conditions, and facilitate seamless current flow control. Ingeniously designed, the drop-out fuse features a robust insulating bracket and fuse tubes, enhanced by static contacts at each bracket end and moving contacts at each fuse tube end. The fuse tube itself is a marvel, composed of an inner arc tube paired with a protective outer shell of phenolic paper or epoxy glass cloth. The Pull Load Drop-out Fuse offers unparalleled operational flexibility through auxiliary contacts and an arc chute, crafted specifically for smooth current load handling.
During typical operations, this drop-out fuse is steadfastly locked in a closed position, with the fuse tube poised under tension. When a system fault occurs, the fault current swiftly causes the fuse to blow, initiating an arc. This arc ignites the arc tube, resulting in the decomposition of vast gas volumes, creating immense internal pressure and generating a vertical wind path that dramatically elongates the arc. Once the fuse blows, the moving contact loses tension and rotates outward, with the locking mechanism disengaging, thus allowing the fuse tube to drop, achieving a break position. Employing an insulating rod, users can pull the load, maintaining contact with the static contact. Continued effort separates the auxiliary contacts, engendering an arc that stretches within the hood slit. This arc cover, enriched with gas, aids in extinguishing the arc precisely as the current reaches zero.
Use and Standards
This remarkable product is meticulously engineered for use in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It provides formidable protection against overloads and short circuits, while enabling the seamless separation and integration of the rated load current with utmost efficiency.
Designed with precision, this product aligns with the JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters adhere to GB15166.3-1994 high voltage fuses Expulsion fuses standards. Where these standards lack detailed parameter definitions, adjustments are meticulously made in accordance with the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses, ensuring a product of the highest caliber.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are top-tier outdoor high-voltage protective devices, ingeniously designed to connect with the incoming feeder of distribution transformers or lines. They perform the critical role of shielding transformers and lines from short circuits and overloads, while efficiently managing the on/off load current. These devices consist of insulating insulator supports along with a fuse tube, featuring static contacts fixed on both sides of the support and moving contacts at the fuse tube ends. The fuse tube is equipped with an internal arc-extinguishing tube, enclosed in an outer shell of a phenolic compound paper tube or an epoxy glass tube. The load switching fuse cutout further enhances performance with elastic auxiliary contacts and an arc-extinguishing enclosure for optimal on-off load current switching.
Under normal operational conditions, the fuse link ensures the fuse tube remains tightened in a closed position. In the event of faults, the fault current rapidly melts the fuse, producing an electric arc that heats the arc-extinguishing tube, releasing substantial gas volumes and creating high pressure to elongate the arc throughout the tube. Once melted, the moving contact releases tension, allowing the mechanism to lock and the fuse tube to drop, switching to an open position. For cutout load switching, operators utilize an insulating operating bar to manipulate the moving contact. Initially, the main contact stays engaged with the auxiliary static contact. As the auxiliary contact is progressively pulled, an electric arc forms between the auxiliary contacts, elongating within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas for efficient arc extinguishment precisely 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. stands as a beacon of groundbreaking innovation and unmatched excellence in the world of electrical integration. As a vibrant high-tech enterprise, we take pride in our seasoned R&D, production, and service team, backed by a wealth of over 15 years of dedicated industry expertise that sets us apart in the field.
Our diversified product portfolio boasts an array of high-performance offerings including high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and formidable substations. These top-tier products are vital to a vast array of sectors, namely the energy and chemical industries, metal smelting, expansive electric power grids, industrial manufacturing, and prestigious universities and research institutions. Furthermore, our solutions are instrumental in empowering the medical and pharmaceutical sectors, fortifying municipal commerce, enhancing water conservation and hydropower projects, optimizing road traffic systems, and enriching commercial and residential developments with cutting-edge technology.
Firmly anchored in an unwavering commitment to technological advancement and the philosophy of 'smart manufacturing,' we tirelessly strive to attract elite technical talent, elevating our core competitive advantage. Our dedication to delivering extraordinary value to our clients drives us to aspire toward becoming the industry's most esteemed brand. Since our inception, we have been on a relentless journey, evolving from our humble beginnings to achieving excellence. This journey is fueled by our unyielding commitment to innovation and a modern business ethos that prioritizes quality as our lifeline, market orientation, reputation-driven growth, and management-driven efficiency. We resolutely adhere to our guiding principles: 'technology as the compass, standardized management, exceptional quality, and customer satisfaction,' relentlessly enhancing our market presence. Our mission is to empower China's electric power and grid transmission and distribution sectors with increasing speed, strength, and ambition. At our core, integrity remains inviolable, quality is sacred, service is paramount, and customer satisfaction is our constant pursuit. Our steadfast pursuit of excellence, relentless innovation, and commitment to building a reputable brand are our guiding lights. Your recognition propels our progress. We warmly thank all our loyal clients for their unwavering support, and Senhang Technology looks forward to collaborating with you to create 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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