Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage electrical defense. Masterfully crafted, these devices are strategically placed on the high-voltage side of distribution transformers or serve as crucial supporting links in distribution lines. They are vital protectors against transformer and line short circuits, overload events, and facilitate effortless current control for opening and loading. With a design that radiates cutting-edge innovation, the drop-out fuse includes an insulating bracket and fuse tubes, securely anchoring static contacts at each end, while gracefully connected moving contacts adorn the ends of the fuse tube. The fuse tube features a state-of-the-art inner arc tube, paired with a durable outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse is exceptional for its superior adaptability, equipped with auxiliary contacts and a precisely engineered arc chute for seamless current load transitions.
In normal operation, the drop-out fuse remains firmly secured in a closed position, with the fuse tube maintained under precise tension. When system faults are recognized, the fault current swiftly acts, blowing the fuse and creating an arc. This vigorous arc ignites the arc tube, decomposing a large volume of gas and creating high pressure within the tube to establish a vertical wind path that skillfully stretches and elongates the arc. As the fuse blows, the moving contact releases, rotating outward with finesse, while the locking mechanism disengages, allowing the fuse tube to drop into a decisive breaking position. When load pulling is required, an insulating rod is utilized to draw out the moving contact while maintaining connection with the static contact. With continuous force application, auxiliary contacts separate, generating an arc that stretches within the hood slit. The arc cover efficiently contains the gas, facilitating effective arc extinguishment as the current approaches zero.
Applications and Compliance Standards
This impressive product is meticulously designed for use in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It delivers steadfast protection against overloads and short circuits while ensuring efficient separation and combination of the rated load current.
The precision-engineered design of this product complies with the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters conform with the prestigious GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In cases where detailed definitions are absent, adjustments are made 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 embodiment of high-performance outdoor high-voltage protective devices. Expertly designed to connect to the incoming feeder of distribution transformers or lines, they are essential in protecting transformers and lines from short circuit incidents and overload scenarios while adeptly managing the on/off load current. The drop-out fuse cutout comprises sturdy insulating supports and a fuse tube, with static contacts strategically fixed on both sides and moving contacts expertly attached at the ends of the fuse tube. The fuse tube features a sophisticated 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 conditions, the fuse link ensures that the fuse tube remains tightly closed. When faults are encountered, the fault current swiftly melts the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing considerable 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 elegantly 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 beacon of groundbreaking innovation and unmatched excellence in the dynamic sphere of electrical integration. As a vibrant high-tech powerhouse, we proudly display a highly experienced R&D, production, and service team, driven by over 15 years of unwavering dedication and industry expertise, setting us apart as leaders in our field.
Our extensive product portfolio includes high-voltage solid-state soft starters, sophisticated capacitor cabinets, high and low voltage switchgear, cutting-edge gas-insulated switchgear, and resilient substations. These premium products are indispensable across diverse sectors, empowering the energy and chemical industries, metal smelting operations, expansive electrical power grids, industrial manufacturing, and esteemed universities and research institutions. Moreover, our solutions energize the medical and pharmaceutical fields, bolster municipal commerce, enhance water conservation and hydropower initiatives, optimize road traffic systems, and elevate both commercial and residential developments.
Firmly anchored in our commitment to technological innovation and the philosophy of 'smart manufacturing,' we are resolute in attracting top-tier technical talent to significantly elevate our core competitive edge. Our unwavering dedication is to deliver unmatched value to our clients and aspire to create the industry's most revered brand. From our inception, we have made relentless progress, evolving from inception to excellence. Our journey is paved with innovation, 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 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. We diligently 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 perennial creed. Our relentless pursuit of excellence, constant innovation, and commitment to building a trustworthy brand remain our guiding principles. Your recognition propels our progress. We extend 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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