Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse stand as paramount guardians of outdoor high-voltage electrical safety. These expertly engineered devices are meticulously placed on the high-voltage side of distribution transformers or integrated into distribution lines, forming indispensable bulwarks against transformer and line short circuits, as well as overload scenarios. Their design facilitates seamless current operation while safeguarding the system. Ingeniously constructed, the drop-out fuse incorporates an insulating bracket and fuse tubes, with static contacts at each bracket's end and moving contacts at the tube's extremities. Featuring an inner arc tube, complemented by an exterior phenolic paper or epoxy glass cloth tube, the device is both robust and reliable. The Pull Load Drop-out Fuse excels with auxiliary contacts and an arc chute, tailored for effortless current load management.
In everyday operation, the drop-out fuse is finely tuned to remain securely closed, with the fuse tube perfectly tensioned. When disruptions arise, the fault current triggers the fuse to blow, producing an arc. This ignites the arc tube, causing substantial gas release and pressure build-up within, creating a dynamic vertical airflow that impressively elongates the arc. Upon fuse blowout, moving contacts rotate outward as tension releases, and the locking mechanism disengages, allowing the fuse tube to drop into a breaking position. For load pulling, an insulating rod expertly maneuvers the moving contact, maintaining engagement with the static contact. Continued effort separates auxiliary contacts, forming and stretching an arc within the hood slit. The arc cover containing gas aids arc extinguishment as current descends to zero, ensuring safe, efficient operations.
Use and Standards
This exceptional product is meticulously crafted for use in 10 to 35KV distribution lines, including branching circuits and on the primary side of distribution transformers. It robustly shields against overloads and short circuits while enabling smooth separation and integration of the rated load current.
Our product's careful design is in full compliance with the JB/T8321-1996 Method for AC high-voltage fuse preparation, and the product parameters meet the stringent GB15166.3-1994 standards for high voltage expulsion fuses. In areas where standards provide less clarity on essential parameters and configurations, we adeptly follow the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses to ensure optimal performance and reliability.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are elite outdoor high-voltage protective solutions. Engineered to seamlessly connect with the incoming feeder of distribution transformers or lines, they are pivotal in defending transformers and lines against short circuits and overloads while adeptly managing on/off load currents. The drop-out fuse cutout features insulating supports with fuse tubes, static contacts on both sides, and moving contacts at the tube ends. The fuse tube boasts an internal arc-extinguishing tube alongside an outer phenolic or epoxy glass composite, ensuring reliable performance. The load switching fuse cutout includes reinforced elastic auxiliary contacts and an arc-extinguishing enclosure, optimizing load current switching with precision.
Under normal operational conditions, the fuse link ensures the fuse tube remains tightly sealed in a closed position. In the event of a fault, the fault current melts the fuse instantly, generating an arc. This action heats the arc-extinguishing tube, releasing copious gas amounts and creating high pressure to elongate the arc through the tube. Post-melting, the moving contact loses tension, unlocking the mechanism and allowing the fuse tube to drop, transitioning to an open state. For load switching during cutout, operators deploy an insulating bar to manipulate the moving contact, keeping the main contact with the auxiliary static contact initially. Further pulling separates the auxiliary contact, forming an arc that elongates within the arc-extinguishing enclosure gap. Simultaneously, gas expulsion aids arc extinguishment as the current approaches zero, ensuring controlled, safe operations.
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. stands as the epitome of innovation and quality excellence in the sphere of electrical integration solutions. Our company, a vibrant beacon of high-tech advancements, is propelled by a dedicated R&D, production, and service team, enriched with more than 15 years of profound industry experience and expertise.
Our expansive portfolio features a range of high-performance products, including high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, advanced gas-insulated switchgear, and durable substations. These high-caliber offerings are pivotal across a diverse array of sectors, such as the energy and chemical industries, metal smelting, expansive electric power grids, and industrial manufacturing. We further extend our impact into esteemed universities and research institutions, while our solutions are also instrumental in empowering the medical and pharmaceutical industries. We contribute to municipal commerce, enhance water conservancy and hydropower projects, optimize road traffic infrastructures, and enrich both commercial and residential developments with our innovative solutions.
Anchored in a steadfast dedication to technological innovation, aligned with our 'smart manufacturing' philosophy, we are passionately committed to attracting top-tier technical talent to comprehensively elevate our core competitive advantages. Our relentless devotion to delivering unparalleled value to clients fuels our aspiration to establish the most prestigious brand within the industry. From our inception, we have made unwavering strides towards excellence, guided by a modern business ethos that prioritizes quality as our lifeline, market orientation, reputation-driven growth, and management-driven efficiency. Our pledge to 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' defines our tenets in quality and technical talent management, as we diligently strive to fortify our market presence. Our mission is to serve China's electric power and grid transmission and distribution domains with increasing speed, strength, and ambition. At our core, integrity is inviolable, quality is revered, service is paramount, and customer satisfaction is our eternal commitment. Our unyielding pursuit of excellence, ceaseless innovation, and dedication to crafting a trustworthy brand are our guiding principles. Your acknowledgment propels our progress. We extend heartfelt gratitude to our loyal clients for their unwavering support, as Senhang Technology looks forward to collaborating with you to build 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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