Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse stand as the sentinels of outdoor high-voltage electrical protection, seamlessly integrating with the high-voltage side of distribution transformers or as a vital component in the distribution line's support link. These fuses serve as reliable guardians against transformer and line short circuits, overload threats, and provide a seamless open or co-load current experience. Constructed meticulously with an insulating bracket and robust fuse tubes, the static contacts are strategically positioned at the insulation bracket's ends, while the dynamic moving contacts are secured on the fuse tubes' ends. The sophisticated fuse tube structure encompasses an inner arc tube, paired with an external layer crafted from phenolic paper or a sturdy epoxy glass cloth tube. Notably, the pull load drop-out fuse is designed to elevate operational flexibility, featuring auxiliary contacts and an arc chute that specializes in managing open and co-load currents with unparalleled efficiency.
In standard operational conditions, the drop-out fuse's tube, under tension from the fuse, remains securely closed. However, when a system anomaly arises, the fault current acts swiftly, blowing the fuse and forming an arc. The intense arc causes the arc tube to burn electrically, leading to the release of copious gas quantities, generating high pressure within the tube and creating a vertical airflow along the pipeline. This action elongates and stretches the arc rapidly. Upon the fuse's detonation, the moving contact loses its tension and disengages, triggering the locking mechanism to release the fuse tube, which then drops, marking the breaking position. For load pulling operations, an insulating rod is employed to disengage the moving contact. Initially, this maintains contact between the moving and static components. By continuing to pull with the insulating rod, the auxiliary contacts separate, resulting in an arc between them. This arc is stretched within the hood slit, where gas is present, allowing the arc to extinguish as the current reaches zero.
Use and Standards
This exceptional product is designed for deployment in 10 ~ 35KV distribution line branching and the primary side of distribution transformers, offering robust overload and short circuit protection through effective separation and combination of the rated load current.
Conforming to the JB/T8321-1996 Method, our product model stands as a testament to quality in AC high-voltage fuses. The product's parameters are crafted in line with the GB15166.3-1994 standards for high voltage expulsion fuses, ensuring reliability. While the standards may not explicitly define all crucial parameters and configurations, adjustments are made in accordance with JB/DQ2139-1986's interim technological requirements for 10 ~ 35KV outdoor high voltage drop fuses, ensuring cutting-edge performance.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are indispensable high voltage protective devices for outdoor use. They seamlessly integrate with the incoming feeder of distribution transformers or distribution lines, primarily shielding transformers or lines from the perils of short circuits and overloads, and proficiently handling on/off loading currents. These fuse cutouts are engineered with insulating supports and a robust fuse tube, with static contacts firmly anchored on both sides of the support and moving contacts strategically positioned at the tube's ends. The fuse tube itself features an inner arc-extinguishing tube, encased in an outer layer of phenolic compound paper or epoxy glass. The load switching fuse cutout is engineered to provide enhanced elastic auxiliary contacts and an arc-extinguishing enclosure for superior on-off loading current management.
Under normal conditions, the fuse link tightens the fuse tube, securing it in a closed position. Should a system fault occur, the resultant fault current promptly melts the fuse, generating an electric arc. This arc heats the arc-extinguishing tube, causing an explosion of gas, which produces high pressure and propels the arc along the tube. Once the fuse link melts, the moving contact loses its tension, the mechanism locks, and the fuse tube drops, indicating an open position. During load switching procedures, the operator uses an insulating operating bar to pull the moving contact. Initially, the main contact remains in contact with the auxiliary static contact. As the pulling continues, the auxiliary contacts separate, generating an electric arc that elongates within the arc-extinguishing enclosure gap. Concurrently, gas is expelled to extinguish the arc as the current approaches 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. is a pioneering high-tech enterprise seamlessly navigating the dynamic realm of electrical integration. With an impressive 15+ years of industry expertise, we boast a proficient R&D, production, and service team dedicated to excellence in every aspect.
Our diverse product range includes state-of-the-art high-voltage solid-state soft starters, premium capacitor cabinets, versatile high and low voltage switchgear, innovative gas-insulated switchgear, and robust substations. These cutting-edge solutions are integral to a myriad of sectors, including energy and chemical industries, metal smelting, power grids, industrial manufacturing, academia, healthcare, municipal commerce, water management, transportation infrastructure, and both commercial and residential developments.
We are devoted to pioneering technological innovation and the philosophy of 'smart manufacturing,' actively seeking top-tier technical talent to amplify our core competencies. Our mission is to deliver unparalleled value to customers, aiming to establish the premier brand in our industry. Since inception, we've embarked on a remarkable journey of transformation—growing from inception to excellence. Our strategy hinges on innovation, upholding quality as the bedrock of survival, leveraging reputation for development, and efficiency as a managerial cornerstone. We are steadfast in our commitment to 'technology as a guide, standardized management, superior quality, and ultimate customer satisfaction,' all in a bid to elevate our market competitiveness. Our goal is to serve China's electric power and grid sectors with unmatched speed, strength, and ambition. Integrity remains our foundation, quality is our hallmark, service is our utmost priority, and customer satisfaction is our enduring creed. Our relentless pursuit of excellence, coupled with continuous innovation, reinforces our commitment to building a reputable and trustworthy brand. Your recognition fuels our passion, and we extend our heartfelt gratitude to both new and loyal customers. Senhang Technology eagerly anticipates collaborative partnerships 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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