Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse epitomize excellence in outdoor high-voltage electrical protection. Precisely engineered, these devices are expertly positioned on the high-voltage side of distribution transformers or as essential support links within distribution lines. Acting as critical safeguards, they offer robust protection against transformer and line short circuits and overloads while facilitating seamless current handling. Masterfully crafted, each drop-out fuse boasts an insulating bracket paired with fuse tubes, with static contacts securely positioned at each end and moving contacts elegantly designed at the tube ends. The fuse tube features a sophisticated inner arc tube, harmoniously paired with a durable outer phenolic paper or epoxy glass cloth tube. Notably, the Pull Load Drop-out Fuse distinguishes itself with superior flexibility, incorporating auxiliary contacts and an arc chute meticulously engineered for smooth and efficient current load operations.
Under standard operation, the drop-out fuse remains securely locked in a closed configuration, with the fuse tube precisely tensioned for optimal performance. In the event of system faults, the fault current promptly initiates the fuse-blowing process, generating a powerful arc. This arc ignites the arc tube, rapidly decomposing large gas volumes, creating high pressure to establish a vertical wind path that expertly stretches and elongates the arc. As the fuse blows, the moving contact gracefully releases, rotating outward, and the locking mechanism disengages, allowing the fuse tube to descend into a decisive break position. When load pulling is required, an insulating rod extracts the moving contact while maintaining connection with the static contact. Upon continued force, the auxiliary contacts separate, generating an arc that stretches within the hood slit. The arc cover efficiently contains the gas, ensuring swift arc extinguishment as the current approaches zero.
Applications and Compliance Standards
This exceptional product is meticulously crafted for deployment 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 rated load current.
Precision-engineered for excellence, this product complies with the rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation. Its design parameters are perfectly aligned with the prestigious GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In scenarios lacking detailed definitions, adjustments are meticulously 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 premier outdoor high-voltage protective devices. Intentionally engineered to seamlessly connect with the incoming feeder of distribution transformers or lines, they play a vital role in safeguarding transformers and lines from short circuit incidents and overload conditions, while adeptly handling on/off load current. Each drop-out fuse cutout features robust insulating supports and a meticulously designed fuse tube, with static contacts fixed on both sides and moving contacts ingeniously positioned at the tube ends. The fuse tube boasts 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 optimal on-off load current switching.
In typical operational scenarios, the fuse link ensures the fuse tube remains tightly closed for maximum reliability. Upon faults, 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, enabling the mechanism to lock and the fuse tube to drop, 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 extracted, an electric arc forms between them, elongating within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism efficiently expels gas to extinguish the arc as the current approaches 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 hallmark of innovation, setting a new standard in electrical integration excellence. As a dynamic high-tech enterprise, we proudly present a seasoned R&D, production, and service team, enriched by over 15 years of dedicated industry experience.
Our diverse 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 top-tier products are essential across various sectors, empowering the energy and chemical industries, metal smelting operations, extensive power grids, and industrial manufacturing. They also support prestigious universities, research institutions, medical and pharmaceutical fields, municipal commerce, water conservation, hydropower projects, road traffic systems, and both commercial and residential developments.
Driven by a commitment to technological innovation and 'smart manufacturing,' we strive to attract elite technical talent, enhancing our core competitive edge. Our dedication is to deliver unparalleled value to our clients, aspiring to create the industry's most esteemed brand. Since our founding, we have journeyed from inception to excellence, guided by innovation and a contemporary business ethos. Quality is our lifeline, market orientation is vital, reputation-driven growth is crucial, and efficiency is achieved through strategic management. We adhere to the principles of 'technology as the guide, standardized management, superior quality, and customer satisfaction' in managing quality and technical talent. Our diligent efforts aim to expand our market presence, serving China's electric power and grid transmission and distribution sectors with vigor and vision. Integrity is our foundation, quality is paramount, service is king, and customer satisfaction is our enduring promise. Our pursuit of excellence, ongoing innovation, and commitment to a trustworthy brand remain our guiding lights. Your recognition fuels our advancements, and we sincerely thank all our loyal clients for their steadfast support. Senhang Technology looks forward to partnering with you to forge a brighter future.
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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