Product Description
Comprehensive Insight
The Drop-out Fuse and Pull Load Drop-out Fuse stand as hallmark solutions in the realm of outdoor high-voltage electrical protection. Strategically situated on the high-voltage flank of distribution transformers or serving as pivotal support links within distribution networks, these devices are indispensable. They serve as vital protectors against transformer and line short circuits and overloads, while also facilitating the seamless opening and co-loading of current. The drop-out fuse is ingeniously crafted with an insulating bracket and fuse tubes, featuring static contacts affixed at both ends of the bracket and dynamic contacts at the ends of the fuse tube. The sophisticated construction of the fuse tube includes an inner arc tube, seamlessly paired with an outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse further exemplifies versatility, with auxiliary contacts and an arc chute, meticulously engineered for flawless current load operations.
Under regular operational conditions, the drop-out fuse is firmly secured in a closed position with the fuse tube tensioned. In the event of a system malfunction, the fault current promptly blows the fuse, igniting an arc. This arc activates the arc tube, triggering the decomposition of substantial gas volumes, creating immense pressure inside the tube and generating a vertical wind channel. This extraordinary mechanism rapidly extends and stretches the arc. Upon the fuse blowing, the dynamic contact releases tension and rotates outward, while the locking mechanism disengages, permitting the fuse tube to drop, achieving a breaking position. When it is necessary to pull the load, an insulating rod is utilized to pull the moving contact, ensuring continuous contact with the static contact. With sustained effort, the auxiliary contacts part ways, forming an arc between them that stretches within the hood slit. The arc cover, containing gas, expedites the arc extinguishment as the current approaches zero.
Standards and Utilization
This distinguished offering is meticulously engineered for deployment across 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It provides robust protection against overloads and short circuits, while enabling efficient separation and combination of the rated load current with unparalleled precision.
This product's meticulous design is in strict adherence to the JB/T8321-1996 Method for AC high-voltage fuse preparation, while also conforming to the GB15166.3-1994 high voltage fuses Expulsion fuses standards. In instances where the standards lack detailed definitions of critical parameters and configurations, adjustments are astutely made 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 epitomize premium outdoor high-voltage protective devices. Crafted to seamlessly integrate with the incoming feeder of distribution transformers or lines, they play a pivotal role in shielding transformers and lines from short circuit incidents and overload conditions, while adeptly managing the on/off load current. The drop-out fuse cutout comprises insulating insulator supports and a fuse tube, with static contacts firmly fixed on both sides of the insulator support and dynamic contacts elegantly positioned at the ends of the fuse tube. The fuse tube features an internal arc-extinguishing tube alongside an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout further includes robust elastic auxiliary contacts and an arc-extinguishing enclosure for faultless on-off load current switching.
In standard operational conditions, the fuse link ensures the fuse tube is securely tightened, maintaining a closed position. When faults arise, the fault current immediately melts the fuse, generating an electric arc, which heats the arc-extinguishing tube to release significant gas volume, creating high pressure to elongate the arc throughout the tube. After the fuse link melts, the moving contact loses tension, allowing the mechanism to lock, and the fuse tube to drop out, switching to an open position. For load switching during cutout, 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 pulled, an electric arc forms between the auxiliary contacts, elongating within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism releases gas to extinguish the arc as the current traverses 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. represents the epitome of innovation and excellence in electrical integration. As a vibrant high-tech enterprise, we proudly feature an experienced R&D, production, and service team with over 15 years of dedicated expertise in the industry.
Our diverse product portfolio includes high-voltage solid-state soft starters, capacitor cabinets, advanced high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and durable substations. These high-performance products are essential across numerous sectors, including the energy and chemical industries, metal smelting, extensive electric power grids, industrial manufacturing, and prestigious universities and research facilities. Moreover, our solutions empower the medical and pharmaceutical fields, support municipal commerce, enhance water conservancy and hydropower projects, optimize road traffic systems, and improve commercial and residential developments.
Firmly rooted in our unwavering commitment to technological innovation and the philosophy of 'smart manufacturing,' we are focused on attracting top-tier technical talent to significantly elevate our company's core competitive advantages. We are passionately devoted to delivering unparalleled value to our clients, with the aspiration to establish the most esteemed brand within the industry. From our inception, we have made relentless progress, journeying from our beginnings to a pinnacle of excellence. Our path is paved with a commitment to innovation, supported by a modern business ethos that emphasizes quality as our lifeline, market orientation, reputation-driven development, and management-driven efficiency. We staunchly uphold our guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction.' These principles guide our quality and technical talent management, as we diligently work to bolster our market presence. Our mission is to serve China's electric power and grid transmission and distribution fields with increasing speed, strength, and ambition. At our core, integrity is non-negotiable, quality is sacred, service reigns supreme, and customer satisfaction is our eternal creed. Our unwavering pursuit of excellence, relentless innovation, and dedication to building a trustworthy brand remain our guiding principles. Your recognition propels our progress. We extend our deepest gratitude to all our loyal clients for their enduring support, and Zhejiang ChaoTai Complete Equipment Co., Ltd. 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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