Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse stand as the pinnacle of outdoor high-voltage electrical protection. Ingeniously crafted, these essential devices are strategically positioned on the high-voltage side of distribution transformers or as crucial components within distribution lines. They act as indispensable guardians against transformer and line short circuits, overload conditions, and facilitate seamless current management for opening and load transitions. Featuring a design that embodies innovation, the drop-out fuse comprises an insulating bracket and fuse tubes, securely anchoring static contacts at each end, while elegantly affixed moving contacts are positioned at the ends of the fuse tube. The advanced fuse tube features an inner arc tube paired with a resilient outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse is renowned for its enhanced versatility, incorporating auxiliary contacts and a meticulously designed arc chute for smooth current load transitions.
Under normal operating conditions, the drop-out fuse is securely locked in a closed position, with the fuse tube under precise tension. When system faults are detected, the fault current acts swiftly, blowing the fuse and generating an arc. This vigorous arc ignites the arc tube, decomposing a substantial volume of gas and creating high pressure within the tube to form a vertical wind path that skillfully stretches and elongates the arc. As the fuse blows, the moving contact releases, rotating gracefully outwards while the locking mechanism disengages, allowing the fuse tube to drop into a decisive breaking position. For load pulling, an insulating rod is employed to draw out the moving contact while maintaining linkage with the static contact. With continuous force application, auxiliary contacts separate, generating an arc that stretches 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 expertly 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 ensuring effective separation and combination of the rated load current.
The precision-engineered design of this product rigorously adheres to the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters align with the prestigious GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In scenarios where detailed definitions are absent, adjustments are tailored 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 the ultimate high-performance outdoor high-voltage protective devices. Flawlessly designed to connect with the incoming feeder of distribution transformers or lines, they play an indispensable 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 supports and a fuse tube, with static contacts strategically fixed on both sides and moving contacts skillfully affixed at the ends of the fuse tube. The fuse tube is equipped with an advanced internal arc-extinguishing tube, complemented by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also incorporates high-performance, 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 volumes of gas and creating high pressure to elongate the arc within the tube. Once melted, the moving contact loses tension, allowing the mechanism to lock, and the fuse tube to gracefully drop out, transitioning to an open position. For cutout load switching, operators deftly utilize an insulating operating bar to draw 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, extending 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. is a leader in visionary innovation and unparalleled excellence in the thriving field of electrical integration. As an energetic high-tech enterprise, we proudly present a skilled R&D, production, and service team, backed by more than 15 years of dedicated experience and expertise in the industry.
Our diverse product lineup 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 top-quality products are essential across a vast array of sectors, serving energy and chemical industries, metal smelting, extensive power grids, industrial manufacturing, and esteemed universities and research institutions. Additionally, our solutions empower the medical and pharmaceutical sectors, bolster municipal commerce, enhance water conservation and hydropower initiatives, optimize road traffic systems, and elevate commercial and residential developments.
Firmly rooted in a commitment to technological innovation and the concept of 'smart manufacturing,' we are dedicated to attracting top-tier technical talent to holistically enhance our core competitive edge. Our steadfast aim is to provide unmatched value to our clients, striving to establish the industry's most respected brand. From our beginnings, we have made relentless progress, advancing from inception to excellence. Our path is marked by innovation and sustained by modern business principles, where quality is our lifeline, market orientation is crucial, reputation-driven growth is vital, and efficiency is achieved through strategic management. We consistently adhere to the principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and technical talent management, diligently working 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 heart, integrity is unwavering, quality is sacrosanct, service is paramount, and customer satisfaction is our perpetual creed. Our relentless pursuit of excellence, constant innovation, and dedication to building a trustworthy brand remain our guiding principles. Your recognition drives our progress. We extend our sincere 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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