Product Description
General
The drop-out fuse and pull load drop-out fuse are pivotal outdoor high-voltage protective devices, acting as the ultimate guardians of electric systems. Strategically situated on the high-voltage side of distribution transformers or nestled within distribution lines, these fuses provide formidable protection against transformer and line short circuits as well as overloads, while proficiently managing open-circuit load currents. Their robust construction showcases an insulating bracket and fuse tubes; the static contact is firmly anchored on each end of the insulation bracket, while the moving contact is stationed at the fuse tube's extremities. Ingeniously designed, the fuse tube is equipped with an inner arc tube encased by an outer phenolic paper tube or an epoxy glass cloth tube. Tailored for operational excellence, the pull load drop-out fuse is outfitted with nimble auxiliary contacts and an arc chute, amplifying its operational dexterity, particularly when contending with open or co-load currents.
In the realm of everyday operations, the drop-out fuse remains closed, maintaining the fuse tube and fuse in a state of taut readiness. When a system fault occurs, the fault current swiftly melts the fuse, igniting an arc. This arc's intense heat precipitates an outpouring of gas from the arc tube, significantly raising the pressure within. A vertical airflow ensues along the pipeline, skillfully stretching and lengthening the arc. As the fuse blows, the moving contact's tension dissipates, triggering the locking mechanism, which then releases the fuse tube, coaxing it into the breaking position. For load pulling, an insulating rod is utilized to disengage the moving contact, initially preserving its connection with the static contact. With persistent pulling using the insulating rod, the auxiliary contacts detach, forming and elongating an arc within the hood slit. The gas from the arc cover aids in extinguishing the arc when the current falls to zero.
Use and Standards
This product is distinguished by its ingenious design, tailored for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It serves as a stalwart defender against overloads and short circuits, while skillfully facilitating the separation and union of rated load currents.
Aligning with exemplary standards, the product model complies with the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is meticulously engineered to meet the stringent requirements set by the GB15166.3-1994 high voltage fuses expulsion fuses standards. In cases where standards ambiguously define crucial parameters and configurations, precision adjustments are executed in accordance with JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology.
Drop-out fuse cutouts and load switching fuse cutouts are indispensable for outdoor high voltage protection. Seamlessly integrated into the incoming feeder of distribution transformers or distribution lines, they offer critical defense against short circuits and overloads, efficiently managing on/off loading currents. The drop-out fuse cutout features insulated insulator supports and a fuse tube; static contacts are securely positioned on either side of the insulator support, while moving contacts rest at the ends of the fuse tube. The intricately designed fuse tube includes an inner arc-extinguishing tube, encapsulated by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is characterized by robust, elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring proficient management of on-off loading currents.
Under standard operating conditions, the fuse link guarantees that the fuse tube remains securely closed. When faults arise, fault currents rapidly melt the fuse, setting off an electric arc that heats the arc-extinguishing tube, releasing ample gas. This high pressure propels the arc along the tube. Once the fuse link melts, the moving contact loses tension, activating the mechanism to lock, and the fuse tube drops out, transitioning the cutout to an open state. To switch off during cutout loading, operators employ an insulating bar to pull 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 elongates within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism releases gas, ensuring the arc is extinguished as the current reaches 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. stands as a beacon of excellence in the vast realm of electrical integration. Celebrated as a prestigious high-tech enterprise, our firm is steadfastly devoted to pioneering innovation, powered by a distinguished team that excels across R&D, production, and unparalleled customer service. With an impressive legacy of over 15 years, we are at the forefront of revolutionizing the industry, consistently setting and exceeding new benchmarks of excellence.
Our expansive product portfolio is a shining testament to our unwavering commitment to excellence. It features high-voltage solid-state soft starters of the utmost caliber, sophisticated capacitor cabinets, and versatile high and low voltage switchgear, all complemented by cutting-edge gas-insulated switchgear. Moreover, we offer state-of-the-art substations meticulously crafted to meet diverse industry demands. Whether serving dynamic energy and chemical sectors, robust metal smelting operations, or expansive electric power grids, our solutions are designed to redefine capabilities. Our advanced offerings are indispensable in industrial manufacturing, prestigious universities, pioneering research entities, and flourishing medical and pharmaceutical sectors. Across municipal commerce, water conservancy and hydropower, road traffic systems, and an extensive array of commercial and residential domains, our products deliver unmatched reliability and superior efficiency.
At Zhejiang ChaoTai, we are driven by an unwavering commitment to technological innovation, seamlessly intertwined with a forward-thinking 'smart manufacturing' philosophy. This dedication draws in the best technical talent, empowering us to enhance our core competitiveness and deliver unparalleled value to our clients, solidifying our position as an undisputed industry leader. From modest beginnings, we've undertaken an extraordinary journey of growth. We've embraced a contemporary business model that is firmly built on quality, market foresight, and operational efficiency through meticulous management. Our ethos is deeply grounded in prioritizing technology, adhering to stringent management standards, delivering exceptional quality, and ensuring customer satisfaction. With integrity as our cornerstone, quality as our strength, and customer satisfaction as our unwavering mission, we aspire to excel, innovate, and build a brand that commands trust across the globe. We extend our heartfelt gratitude to all our esteemed customers for their unwavering support and loyalty. Together with Senhang Technology, we are poised to craft a brighter future, hand in hand, shaping tomorrow's innovations today!
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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