Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse are the pinnacle of excellence in outdoor high-voltage electrical protection systems. These precision-engineered devices are strategically positioned on the high-voltage side of distribution transformers or serve as vital support links in distribution lines. They act as indispensable guardians against transformer and line short circuits, manage overload conditions, and ensure the seamless opening and loading of current. Ingeniously crafted, the drop-out fuse comprises an insulating bracket and fuse tubes, with static contacts firmly affixed at each end and moving contacts gracefully attached to the ends of the fuse tube. The sophisticated construction of the fuse tube features an advanced inner arc tube paired with a robust outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse distinguishes itself with superior flexibility, featuring auxiliary contacts and an arc chute meticulously designed for smooth current load operations.
In standard operations, the drop-out fuse remains securely locked in a closed position, with the fuse tube precisely tensioned. When system faults are detected, the fault current acts decisively, blowing the fuse and generating an arc. This powerful arc ignites the arc tube, decomposing large gas volumes and producing high pressure within the tube to create a vertical wind path that masterfully stretches and elongates the arc. As the fuse blows, the moving contact releases, rotating elegantly outwards while the locking mechanism disengages, allowing the fuse tube to drop to achieve a definitive breaking position. For necessary load pulling, an insulating rod is used to draw out the moving contact while maintaining a connection with the static contact. With continued application of force, auxiliary contacts separate, generating an arc between them that elongates within the hood slit. The arc cover adeptly contains the gas, facilitating efficient arc extinguishment as the current approaches zero.
Applications and Compliance Standards
This distinguished product is meticulously crafted for use 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, ensuring the integrity and reliability of your energy distribution.
The precision-engineered design of this product adheres to the exacting JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters are harmonized with the esteemed GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In scenarios where detailed definitions are absent, adjustments are skillfully crafted in accordance with the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses, ensuring superior performance and compliance.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout represent the zenith of outdoor high-voltage protective solutions. Deliberately designed to connect with the incoming feeder of distribution transformers or lines, they play a crucial 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 firmly secured on both sides and moving contacts expertly installed at the ends of the fuse tube. The fuse tube is equipped with a sophisticated internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also features 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 swiftly melts the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing substantial gas volumes and creating high pressure to stretch 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 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, stretching within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to efficiently extinguish the arc as the current passes through zero, ensuring optimal performance and safety.
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. emerges as a shining beacon of groundbreaking innovation and unparalleled excellence in the realm of electrical integration. As a dynamic high-tech enterprise, we proudly present a highly skilled and experienced R&D, production, and service team. With over 15 years of dedicated expertise, we stand at the forefront of industry advancement, embodying unwavering commitment and profound knowledge.
Our extensive product range showcases high-voltage solid-state soft starters, sophisticated capacitor cabinets, meticulously engineered high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These superior products are vital across a multitude of sectors, including the energy and chemical industries, metal smelting enterprises, expansive electrical power grids, industrial manufacturing, and esteemed universities and research institutions. Additionally, our solutions empower the medical and pharmaceutical realms, bolster municipal commerce, enhance water conservation and hydropower projects, optimize road traffic systems, and elevate commercial and residential developments to new heights.
Firmly anchored in a commitment to technological innovation and the philosophy of 'smart manufacturing,' we are resolute in attracting top-tier technical talent to substantially fortify our core competitive advantage. Our dedication to delivering unparalleled value to our clients drives us to aspire to create the industry's most revered brand. Since our inception, we have made relentless strides, transforming from inception to excellence. Our journey is a testament to innovation, sustained by a modern business ethos where quality is our lifeline, market orientation is paramount, reputation-driven growth is crucial, and efficiency is achieved 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. With diligence, we work to expand our market presence, serving 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 unwavering creed. Our relentless pursuit of excellence, constant innovation, and commitment to building a trustworthy brand remain our guiding principles. Your recognition fuels our progress. We extend heartfelt gratitude to all our loyal clients for their enduring support, and 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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