Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage electrical protection solutions. With meticulous design, these devices are strategically installed on the high-voltage side of distribution transformers or as essential support components within distribution lines. They serve as critical safeguards against transformer and line short circuits, overload conditions, and ensure smooth current opening and loading operations. Engineered with precision, the drop-out fuse consists of an insulating bracket and fuse tubes, with static contacts firmly anchored at each end and moving contacts elegantly positioned at the fuse tube's ends. The construction of the fuse tube includes a sophisticated 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, featuring auxiliary contacts and an artfully designed arc chute to facilitate seamless current load operations.
During typical operations, the drop-out fuse maintains a secure closed position, with the fuse tube perfectly tensioned. Detecting system faults, the fault current swiftly ruptures the fuse, creating an arc. This powerful arc ignites the arc tube, decomposing large gas volumes and generating significant pressure within the tube to form a vertical wind path that expertly stretches and elongates the arc. As the fuse blows, the moving contact releases, rotating effortlessly outward while the locking mechanism disengages, allowing the fuse tube to drop and attain a decisive breaking position. When load pulling is required, an insulating rod draws out the moving contact while retaining the connection with the static contact. With sustained force, auxiliary contacts separate, producing an arc between them that extends within the hood slit. The arc cover effectively contains the gas, promoting proficient arc extinguishment as the current approaches zero.
Applications and Compliance Standards
This distinguished product is expertly crafted for application in 10 to 35KV distribution lines, encompassing branching lines and the primary side of distribution transformers. It offers unwavering protection against overloads and short circuits while enabling efficient separation and combination of the rated load current, ensuring reliability in critical electrical infrastructure.
The precisely engineered design of this product aligns seamlessly with the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters comply with the venerable GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In situations where detailed definitions are not specified, adjustments are meticulously crafted in accordance with the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses, ensuring adherence to industry-leading standards.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are premier outdoor high-voltage protective devices of exceptional caliber. Purposefully designed to connect with the incoming feeder of distribution transformers or lines, they play a pivotal role in safeguarding transformers and lines from short circuit incidents and overload conditions, while skillfully managing the on/off load current. The drop-out fuse cutout is composed of resilient insulating insulator supports and a fuse tube, with static contacts securely fixed on both sides and moving contacts expertly installed at the ends of the fuse tube. The fuse tube incorporates a sophisticated internal arc-extinguishing tube, paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is further enhanced with elastic 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 securely closed. Upon encountering faults, the fault current promptly melts the fuse, generating an electric arc that activates the arc-extinguishing tube, releasing substantial gas volumes and creating high pressure to elongate the arc within the tube. After melting, the moving contact loses tension, allowing 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 proficiently extinguish the arc as the current reaches zero, ensuring operational safety and continuity.
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. proudly shines as a luminary of cutting-edge advancements and exceptional distinction in the realm of electrical integration. As a dynamic high-tech enterprise, we take pride in presenting a profoundly skilled R&D, production, and service team, fortified by over 15 years of unwavering commitment and industry expertise.
Our extensive product portfolio boasts high-voltage solid-state soft starters, advanced capacitor cabinets, comprehensive high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and robust substations. These premium products are indispensable across myriad industries, powering the energy and chemical sectors, metal smelting operations, vast electrical power grids, industrial manufacturing, and prestigious universities and research institutions. Additionally, our solutions invigorate the medical and pharmaceutical fields, bolster municipal commerce, enhance water conservation and hydropower projects, optimize road traffic systems, and elevate both commercial and residential developments.
Firmly rooted in our commitment to technological innovation and the ethos of 'smart manufacturing,' we remain steadfast in attracting top-tier technical talent to holistically amplify our core competitive edge. Our unwavering mission is to deliver unparalleled value to our clients, aspiring to forge the industry's most esteemed brand. Since our inception, we have made relentless strides, evolving from inception to excellence. Our journey is illuminated by innovation and sustained by a modern business ethos, where quality is our lifeline, market orientation is crucial, reputation-driven growth is paramount, and efficiency is achieved through strategic management. We steadfastly adhere to the principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in managing quality and technical talent, 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 core, integrity is inviolable, quality is sacred, service is sovereign, and customer satisfaction is our perpetual creed. Our relentless pursuit of excellence, continuous innovation, and commitment to creating a trustworthy brand remain unwavering. Your recognition fuels our progress. We extend our deepest gratitude to all our loyal clients for their enduring support, and Senhang Technology eagerly anticipates partnering with you to shape a more promising 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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