Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse are the pinnacle of outdoor high-voltage electrical protection, engineered with exceptional precision. These paramount devices are strategically installed on the high-voltage side of distribution transformers or as critical support links within distribution lines. They are pivotal in safeguarding against transformer and line short circuits, overload conditions, and enabling seamless current opening and loading. Crafted with unparalleled ingenuity, the drop-out fuse features an insulating bracket and fuse tubes, with static contacts securely affixed at each end and moving contacts expertly attached to the ends of the fuse tube. The fuse tube construction 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 superior flexibility, incorporating auxiliary contacts and an arc chute meticulously designed for smooth current load operations.
In standard operation, the drop-out fuse maintains a steadfast closed position, with the fuse tube precisely tensioned. Upon the detection of system faults, the fault current promptly blows the fuse and initiates the arc. This dynamic arc ignites the arc tube, decomposing vast volumes of gas and generating high pressure within to create a vertical wind path that adeptly stretches and elongates the arc. As the fuse blows, the moving contact gracefully releases and rotates outward, allowing for the disengagement of the locking mechanism, leading to the fuse tube's decisive drop and breaking position. When load pulling is required, an insulating rod is utilized to draw out the moving contact while retaining connection with the static contact. Continued force application sees the auxiliary contacts separate, instigating an arc between them that extends within the hood slit. The arc cover effectively contains the generated gas, facilitating efficient arc extinguishment as the current approaches zero.
Applications and Compliance Standards
This exceptional product is meticulously crafted for application 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 the effective separation and combination of the rated load current.
The precision-engineered design of this product meticulously adheres to the rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters are fully aligned with the esteemed GB15166.3-1994 standards for high voltage fuses, specifically Expulsion fuses. In cases where detailed definitions are lacking, 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 are premier outdoor high-voltage protective devices. Intentionally engineered to seamlessly connect with the incoming feeder of distribution transformers or lines, they play a crucial role in safeguarding transformers and lines from short circuit incidents 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 securely affixed on both sides and moving contacts masterfully installed at the ends of the fuse tube. It 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 includes 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 fault encounter, 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 elongate the arc within the tube. Post-melting, the moving contact loses tension, allowing the mechanism to unlock and the fuse tube to drop out, transitioning to an open position. For cutout load switching, operators utilize an insulating operating bar to extract 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 transits 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 emblem of groundbreaking innovation and unparalleled excellence within the arena of electrical integration. As a dynamic high-tech enterprise, we proudly present a highly accomplished R&D, production, and service team, fortified by over 15 years of unwavering dedication and expertise in the industry.
Our extensive product range includes high-voltage solid-state soft starters, sophisticated capacitor cabinets, both high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These superior products are essential across various sectors, catering to the energy and chemical industries, metal smelting operations, vast electrical power grids, industrial manufacturing, and prestigious universities and research institutions. Furthermore, 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.
Rooted in our steadfast commitment to technological innovation and the philosophy of 'smart manufacturing,' we are dedicated to attracting top-tier technical talent to comprehensively enhance our core competitive advantage. Our unwavering goal is to deliver unmatched value to our clients, aspiring to craft the most esteemed brand in the industry. From our inception, we have relentlessly progressed, evolving from inception to excellence. Our journey 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 achieved through strategic management. We adhere steadfastly to the guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and technical talent management, diligently striving 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 perpetual 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 express our 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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