Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse exemplify the pinnacle of outdoor high-voltage electrical protection. Expertly engineered, these devices are strategically positioned on the high-voltage side of distribution transformers or serve as vital support links in distribution lines. They are indispensable defenders against transformer and line short circuits, mitigate overload conditions, and enable seamless opening and current load management. Ingeniously designed, the drop-out fuse consists of an insulating bracket and fuse tubes, with static contacts firmly secured at each end and moving contacts elegantly attached to the ends of the fuse tube. The fuse tube's construction is advanced, featuring a sophisticated inner arc tube combined with a robust outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse distinguishes itself with enhanced flexibility, offering auxiliary contacts and an arc chute meticulously engineered for smooth current load operations.
During standard operations, the drop-out fuse remains securely locked in a closed stance with the fuse tube precisely tensioned. When system faults are detected, the fault current rapidly blows the fuse and forms an arc. This dynamic arc ignites the arc tube, leading to the decomposition of large gas volumes and the generation of high pressure within the tube, crafting a vertical wind path that skillfully stretches and elongates the arc. As the fuse blows, the moving contact releases, rotating gracefully outward as the locking mechanism disengages, allowing the fuse tube to drop and achieve a decisive breaking position. For load pulling, an insulating rod is employed to draw out the moving contact while maintaining engagement with the static contact. With the continued application of force, auxiliary contacts disengage, generating an arc between them that stretches within the hood slit. The arc cover adeptly contains the gas, enabling efficient arc extinguishment as the current reaches zero.
Applications and Compliance Standards
This distinguished product is thoughtfully designed for deployment 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 facilitating effective separation and combination of the rated load current.
The precision-crafted design of this product adheres to the stringent 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, specifically Expulsion fuses. In scenarios where detailed definitions are unspecified, adjustments are meticulously 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 ascend as premier outdoor high-voltage protective devices. Intentionally 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 episodes and overload conditions while expertly managing the on/off load current. The drop-out fuse cutout comprises resilient insulating insulator supports and a fuse tube, with static contacts firmly fixed on both sides and moving contacts masterfully installed at the ends of the fuse tube. The fuse tube is distinguished by a sophisticated internal arc-extinguishing tube partnered 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 common operational scenarios, the fuse link ensures the fuse tube remains tightly closed. Upon encountering faults, the fault current swiftly melts the fuse, producing an electric arc that energizes the arc-extinguishing tube, releasing substantial gas volumes and creating high pressure to elongate the arc within the tube. Following the 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 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. Concurrently, 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. stands tall as a shining beacon of revolutionary innovation and unmatched excellence in the realm of electrical integration. As a dynamic high-tech enterprise, we proudly present a highly skilled R&D, production, and service team, fortified by over 15 years of steadfast dedication and expertise in the industry.
Our extensive product assortment includes 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-grade products are vital across diverse sectors, catering to the energy and chemical industries, metal smelting operations, expansive electrical power grids, industrial manufacturing, and elite universities and research institutions. Additionally, our solutions empower the medical and pharmaceutical fields, support municipal commerce, enhance water conservation and hydropower projects, optimize road traffic systems, and elevate commercial and residential developments on every front.
Firmly rooted in a commitment to technological innovation and the philosophy of 'smart manufacturing,' we are unwavering in our pursuit of top-tier technical talent to holistically amplify our core competitive advantage. Our steadfast dedication lies in offering unrivaled value to our clients, aspiring to craft the industry's most esteemed brand. From our inception, we have persevered relentlessly, evolving from infancy to excellence. Our journey is marked by continual innovation and sustained by a modern business ethos, where quality is our lifeline, market orientation is pivotal, reputation-driven growth is paramount, and efficiency is achieved through strategic management. We steadfastly adhere to the guiding tenets of 'technology as the guide, standardized management, superior quality, and customer satisfaction' in our quality and technical talent management, meticulously working to broaden our market reach. 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 indispensable, quality is inviolable, service is sovereign, and customer satisfaction is our everlasting creed. Our relentless pursuit of excellence, constant innovation, and dedication to building a reliable brand remain our guiding principles. Your recognition fuels our progress. We extend our deepest gratitude to all our loyal clients for their unwavering 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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