Product Description
General
The drop-out fuse and pull load drop-out fuse are quintessential outdoor high-voltage protective devices that are vital guardians of electrical systems. These indispensable components are typically positioned on the high-voltage side of distribution transformers or serve as crucial connections in distribution lines. Their primary role is to shield against transformer and line short circuits, deftly manage overloads, and facilitate open-circuit load currents. Ingeniously crafted, they consist of an insulating bracket paired with fuse tubes. The static contact is precisely mounted on both ends of the insulation bracket, while the dynamic moving contact is affixed at the ends of the fuse tube. The fuse tube's construction boasts an inner arc tube seamlessly enveloped by an outer phenolic paper tube or a robust epoxy glass cloth tube. The sophisticated pull load drop-out fuse features flexible auxiliary contacts and an advanced arc chute, enhancing operational flexibility, especially when opening or co-load currents are at play.
Under optimal conditions, the drop-out fuse remains securely closed, with both the fuse tube and fuse meticulously maintained under tension. In the event of a system malfunction, the fault current swiftly melts the fuse, igniting an arc. This arc heats the arc tube intensely, releasing copious amounts of gas and creating a high-pressure environment within the tube. Consequently, a vertical wind is generated along the pipeline, stretching and expanding the arc. Once the fuse is blown, the moving contact loses its tension, triggering the precise locking mechanism. This releases the fuse tube, allowing it to drop into the breaking position. In the process of pulling the load, an insulating rod is utilized to disengage the moving contact, initially maintaining contact with the static contact. By continually pulling with the insulating rod, the auxiliary contacts are separated, forming an arc that elongates gracefully within the hood slit. The gas within the arc cover assists in extinguishing the arc as the current gracefully returns to zero.
Use and Standards
Ingeniously designed for deployment within 10 ~ 35KV distribution lines, branching lines, and the primary side of distribution transformers, this product provides exceptional protection against overloads and short circuits. It seamlessly handles the separation and combination of rated load currents, ensuring operational excellence.
This product model is meticulously crafted in accordance with the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It adheres rigorously to the GB15166.3-1994 high voltage fuses expulsion fuses standards. In instances where standards ambiguously define key parameters and configurations, precise adjustments are made in alignment with JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology.
Drop-out fuse cutouts and load switching fuse cutouts stand as pivotal outdoor high-voltage protective devices. Seamlessly integrated with the incoming feeder of distribution transformers or distribution lines, they provide indispensable protection against short circuits and overloads, while expertly managing on/off loading currents. The drop-out fuse cutout features insulate insulator supports and a fuse tube, with static contacts securely mounted on both sides of the insulator support, and moving contacts installed at the fuse tube ends. The architecture of the fuse tube includes an inner arc-extinguishing tube enveloped by an outer phenolic compound paper tube or a durable epoxy glass tube. The load switching fuse cutout is enhanced with elastic auxiliary contacts and an arc-extinguishing enclosure to deftly manage on-off loading current with finesse and precision.
During standard operating conditions, the fuse link guarantees that the fuse tube remains securely in a closed position. In the event of a system fault, the fault current swiftly melts the fuse, producing a formidable electric arc that heats the arc-extinguishing tube, releasing substantial gas and creating a high-pressure environment that propels the arc along the tube. Upon the melting of the fuse link, the moving contact loses its tension, triggering the precise locking mechanism. The fuse tube subsequently drops out, transitioning the cutout to an open position. For secure switching off during cutout loading, operators skillfully employ an insulating operating bar to disengage the moving contact. Initially, the main contact and auxiliary static contact remain engaged, but further pulling disengages the auxiliary contacts, generating an electric arc that elegantly elongates within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism releases gas to efficiently extinguish the arc as the current smoothly returns to 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. proudly positions itself at the pinnacle of electrical integration, recognized as a prestigious high-tech powerhouse. With an illustrious team excelling in R&D, production, and service, we harness more than 15 years of profound expertise, propelling us to innovate and lead the industry with brilliance.
Our extraordinary product lineup includes high-voltage solid-state soft starters, efficient capacitor cabinets, versatile high and low voltage switchgear, sophisticated gas-insulated switchgear, and cutting-edge substations. These have become integral in a myriad of sectors: the vibrant energy sector, transformative chemical industries, robust metal smelting operations, and expansive electric power grids. Our advanced solutions also enhance industrial manufacturing, esteemed academia, pioneering research institutions, alongside the dynamic medical and pharmaceutical realms. Additionally, our influence extends to municipal commerce, vital water conservancy and hydropower sectors, comprehensive road traffic systems, and a wide array of commercial and residential domains.
Driven by an unwavering commitment to technological innovation and a visionary 'smart manufacturing' ethos, we are dedicated to attracting elite technical expertise. This dedication bolsters our core competitiveness, empowering us to deliver unmatched value to our clients while aspiring to establish our brand as an industry leader. From humble origins to industry excellence, we've embarked on a remarkable growth trajectory. Our guiding principles revolve around innovation, adopting a modern business model that thrives on unparalleled quality for survival, market insight for growth, a solid reputation for development, and efficiency through strategic management. Our steadfast promise is to prioritize technology as our guiding light, adhere to standardized management, consistently deliver exceptional quality, and ensure customer satisfaction. This commitment reinforces our market presence and drives us to ambitiously serve China's electric power and grid sectors. With integrity as our cornerstone, quality as our strength, service as our signature, and customer satisfaction as our eternal ethos, we pursue excellence, strive for continuous innovation, and craft a brand that commands trust. Your recognition propels our journey, and we sincerely thank all our esteemed customers for their steadfast support and loyalty. Together with Senhang Technology, we eagerly anticipate crafting a brighter future, hand in hand!
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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