Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of excellence in outdoor high-voltage electrical protection. Engineered with meticulous precision, these devices are strategically deployed on the high-voltage side of distribution transformers or as essential links within distribution lines. They serve as crucial guardians against transformer and line short circuits and overload conditions while seamlessly managing the opening and loading of current. Masterfully designed, the drop-out fuse features an insulating bracket and fuse tubes, with static contacts firmly secured at each end and moving contacts gracefully fastened to the fuse tube's ends. The fuse tube's construction is characterized by an advanced inner arc tube complemented by 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 expertly crafted for effortless current load operations.
During standard operations, the drop-out fuse is held firmly in a closed position, with the fuse tube precisely tensioned. When system faults are detected, the fault current acts expeditiously, blowing the fuse and forming an arc. This intense arc activates the arc tube, generating a substantial gas volume and high pressure within the tube to create a vertical wind path that efficiently stretches and elongates the arc. As the fuse blows, the moving contact releases, rotating elegantly outward as the locking mechanism disengages, allowing the fuse tube to drop and achieve a definitive breaking position. When load pulling is required, an insulating rod is employed to draw out the moving contact while maintaining engagement with the static contact. With continued application of force, auxiliary contacts separate, forming an arc between them that stretches within the hood slit. The arc cover effectively contains the gas, facilitating seamless arc extinguishment as the current momentarily reaches zero.
Applications and Compliance Standards
This distinguished product is intricately designed for application in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It offers uncompromising protection against overloads and short circuits while ensuring efficient separation and combination of the rated load current.
The precision-designed attributes of this product comply with the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation. Its specifications adhere to the prestigious GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In cases where detailed definitions are absent, adjustments are meticulously crafted in alignment 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 stand as premier outdoor high-voltage protection devices, purposefully engineered to connect with the incoming feeder of distribution transformers or lines. They play an indispensable role in safeguarding transformers and lines from short circuit and overload incidents while expertly managing the on/off load current. The drop-out fuse cutout is composed of durable insulating insulator supports and a fuse tube, with static contacts affixed on both sides and moving contacts skillfully installed at the ends of the fuse tube. The fuse tube features an advanced internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also includes enhanced auxiliary contacts and an arc-extinguishing enclosure for efficient on-off load current switching.
In standard operational scenarios, the fuse link ensures the fuse tube remains tightly closed. Once faults are encountered, the fault current swiftly melts the fuse, producing an electric arc that heats the arc-extinguishing tube, releasing substantial gas volumes and generating high pressure to stretch the arc within the tube. Following the melting process, the moving contact loses tension, enabling the mechanism to unlock and the fuse tube to drop into an open position. For cutout load switching, operators use an insulating operating bar to pull the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact continues to pull, 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. epitomizes groundbreaking innovation and unparalleled excellence in the field of electrical integration. As a dynamic high-tech enterprise, we proudly present an expert R&D, production, and service team, strengthened by over 15 years of dedicated industry experience and commitment.
Our diverse product portfolio 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 exceptional products are vital across various sectors, powering the energy and chemical industries, metal smelting processes, expansive electrical power grids, industrial manufacturing, and prestigious universities and research institutions. Additionally, our solutions invigorate the medical and pharmaceutical industries, support municipal commerce, enhance water conservation and hydropower initiatives, streamline road traffic systems, and elevate commercial and residential developments.
Driven by a commitment to technological innovation and a 'smart manufacturing' philosophy, we are devoted to attracting elite technical talent to elevate our core competitive advantage. Our goal is to provide unparalleled value to our clients and to cultivate the industry's most admired brand. Since our inception, we have advanced relentlessly, evolving from a promising start to a beacon of excellence. Our journey thrives on innovation, propelled by a modern business ethos where quality is our lifeline, market orientation is pivotal, reputation-driven growth is crucial, and efficiency is attained through strategic management. We adhere to the principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in quality and technical talent management, diligently expanding our market reach. Our mission is to serve China's electric power and grid transmission 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 unyielding promise. Our relentless pursuit of excellence, ongoing innovation, and commitment to building a trustworthy brand are our guiding principles. Your recognition fuels our progress. We extend heartfelt gratitude to our loyal clients for their steadfast support, and Senhang Technology eagerly anticipates collaborating with you to forge 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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