Product Description
General
Introducing our Drop-out Fuse and Pull Load Drop-out Fuse, the ultimate guardians for outdoor high-voltage electrical systems. Perfectly engineered for placement on the high-voltage side of distribution transformers or as vital supports in distribution lines, these devices provide unparalleled protection against transformer and line short circuits, as well as overload conditions. They also facilitate smooth current operations. Crafted with an insulating bracket and fuse tubes, featuring static contacts on both ends and moving contacts at the fuse tube ends, these fuses are a marvel of engineering. The interior arc tube is paired with either an outer phenolic paper tube or an epoxy glass cloth tube, forming a robust construction. Meanwhile, the Pull Load Drop-out Fuse offers exceptional adaptability with auxiliary contacts and an arc chute for seamless current load handling.
In a standard operational setup, our drop-out fuse is held securely closed with the fuse tube under tension. Should a system fault arise, the fault current immediately blows the fuse, igniting an arc within the tube. This triggers the arc tube to decompose and release large gas volumes, which generates high pressure and initiates a vertical wind path. This efficient mechanism rapidly stretches the arc. Once the fuse has blown, the moving contact releases its tension, rotating outwards as the lock disengages, allowing the fuse tube to drop and reach a breaking position. For load pulling, an insulating rod is used to maneuver the moving contact, maintaining its connection with the static contact. As the auxiliary contacts separate, an arc forms between them, which elongates within the hood slit. The arc cover, rich with gas, is crucial in extinguishing the arc precisely as the current zeroes out.
Use and Standards
Engineered for excellence, this product is tailored for utilization in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It delivers comprehensive protection against overloads and short circuits while facilitating smooth separation and combination of the rated load current.
Our product's exquisite craftsmanship aligns with the JB/T8321-1996 Method for AC high-voltage fuse preparation, and conforms to GB15166.3-1994 high voltage fuses Expulsion fuses standards. In cases where standards lack explicit definitions for key parameters and configurations, adjustments are meticulously crafted following the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses.
Our Drop-out Fuse Cutout and Load Switching Fuse Cutout are the pinnacle of outdoor high-voltage protection. Designed to seamlessly connect with the incoming feeder of distribution transformers or lines, they serve as critical protectors against short circuits and overloads while managing on/off load currents efficiently. The drop-out fuse cutout integrates insulating insulator supports and a fuse tube, with static contacts on both sides and moving contacts at the tube ends. The fuse tube is equipped with an internal arc-extinguishing tube, enveloped by a phenolic compound paper or epoxy glass tube. The load switching fuse cutout enhances flexibility with enforced elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring efficient current switching.
During normal operations, our fuse link ensures the fuse tube remains securely tightened in a closed position. Upon a fault occurrence, the fault current swiftly melts the fuse, creating an electric arc. This causes the arc-extinguishing tube to heat up and release a vast volume of gas, generating high pressure and extending the arc throughout the tube. After melting, the moving contact loses tension, allowing the mechanism to release the lock and the fuse tube to drop into an open position. For load switching during cutout, operators utilize an insulating operating bar to pull the moving contact. Initially, the main contact stays engaged with the auxiliary static contact. Further pulling separates the auxiliary contact, creating an arc that elongates within the arc-extinguishing enclosure gap. The arc-extinguishing mechanism efficiently expels gas, extinguishing the arc 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 innovation and excellence in the world of electrical integration. As a dynamic high-tech enterprise, we pride ourselves on having an experienced R&D, production, and service team, imbued with over 15 years of dedicated industry expertise that drives our pioneering spirit.
Our expansive product portfolio features high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and durable substations. These high-performance offerings seamlessly integrate into a wide array of industries, serving the energy and chemical sectors, metal smelting, extensive electric power grids, industrial manufacturing, and leading universities and research institutions. Our solutions also empower the medical and pharmaceutical realms, strengthen municipal commerce, enhance water conservancy and hydropower projects, optimize transportation systems, and enrich both commercial and residential landscapes.
Firmly rooted in our commitment to technological advancement and the ethos of 'smart manufacturing,' we are dedicated to attracting top-tier technical talent to holistically elevate our company's core competitive edge. Driven by an unwavering quest to deliver extraordinary value to our clients, we aspire to create the most esteemed brand in the industry. From our inception, we've been on a relentless path of growth and innovation, guided by a modern business ethos that emphasizes quality as our lifeline, market orientation, reputation-driven development, and management-driven efficiency. We adhere steadfastly to our guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction,' as we diligently work to enhance our market prominence. Our mission is to serve China's electric power and grid transmission and distribution domains with vigor, strength, and ambition. At our core, integrity is inviolable, quality is revered, service is paramount, and customer satisfaction is our eternal promise. Our pursuit of excellence, relentless innovation, and dedication to establishing a trustworthy brand are the cornerstones of our philosophy. Your recognition propels our progress, and we extend our heartfelt gratitude to all our loyal clients for their unwavering support. We, at Senhang Technology, eagerly anticipate the opportunity to collaborate with you in forging 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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