Product Description
General
Our Drop-out Fuse and Pull Load Drop-out Fuse serve as stalwart guardians of outdoor high-voltage electrical systems. Positioned strategically on the high-voltage side of distribution transformers or as a pivotal support link in distribution lines, they provide robust protection against short circuits, overloads, and facilitate seamless current transitions. Constructed with an insulating bracket and fuse tubes, these devices feature static contacts at each end of the bracket and dynamic contacts on the fuse tubes. The fuse tube itself is masterfully crafted from both an inner arc tube and an outer shell made from either phenolic paper or epoxy glass cloth, ensuring durability and reliability. The pull load drop-out fuse is further enhanced with flexible auxiliary contacts and an arc chute, bolstering its ability to manage and open co-load currents with precision.
During standard operations, the fuse tube remains closed, held by the tension of the fuse itself. Upon encountering a system fault, the resulting fault current swiftly disrupts the fuse, igniting an arc. This arc ignites the arc tube, causing it to decompose and release a significant volume of gas, thereby creating high pressure within the tube. This pressure generates a powerful vertical wind that stretches and elongates the arc. Once the fuse has blown, the moving contact loses its tension, activating the locking mechanism, which releases the fuse tube and causes it to drop, thereby breaking the circuit. For load operations, an insulating rod is employed to maneuver the moving contact. Initially, both moving and static contacts remain engaged. As the rod continues to pull, the auxiliary contacts separate, producing an arc that stretches within the hood slit. The arc cover is designed to extinguish the arc once the current reaches zero.
Use and Standards
Our product excels in safeguarding 10 ~ 35KV distribution lines and the primary side of distribution transformers, providing robust protection against overloads and short circuits. It excels in seamlessly separating and combining rated load currents, ensuring optimal performance and reliability in critical applications.
Crafted in adherence to JB/T8321-1996, the product embodies the precision required for type AC high-voltage fuses. Additionally, it conforms to the GB15166.3-1994 standards for expulsion fuses, ensuring unparalleled quality and performance. Adjustments are guided by JB/DQ2139-198610 ~ 35KV outdoor high-voltage drop fuse interim technology, ensuring all essential parameters and configurations meet exacting standards.
Drop-out Fuse Cutouts and Load Switching Fuse Cutouts are paramount outdoor high voltage protective devices. They seamlessly connect to the incoming feeder of distribution transformers or distribution lines. Their primary function is to safeguard transformers and lines from short circuits and overload scenarios, while adeptly managing on/off loading currents. The assembly consists of insulating support structures and a robust fuse tube. Static contacts are securely fastened on both sides of the insulator support, with the dynamic contact affixed at the ends of the fuse tube. The fuse tube features an internal arc-extinguishing tube and an outer layer composed of phenolic compound paper or epoxy glass. The load switching fuse cutout is further refined with enforced elastic auxiliary contacts and an arc-extinguishing enclosure, facilitating smooth and efficient current transitions.
Under normal operation, the fuse link fortifies the fuse tube in a secured closed position. When system faults arise, the fault current promptly melts the fuse, generating an electric arc. This arc heats the arc-extinguishing tube, causing a release of gas that produces high pressure and directs the arc along the tube. Once the fuse link has melted, the moving contact loses its strength, engaging the locking mechanism and causing the fuse tube to drop, transitioning the cutout to an open position. When switching off during cutout loading, operators employ an insulating operating bar to maneuver the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact is pulled apart, an electric arc forms and extends within the arc-extinguishing enclosure gap. This extension, coupled with the arc-extinguishing gas, extinguishes 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 at the forefront of technological innovation as a high-tech enterprise specializing in electrical integration. Backed by over 15 years of industry expertise, our exceptional team is dedicated to research, development, production, and service, ensuring we deliver cutting-edge solutions for the ever-evolving market.
Our comprehensive product range encompasses high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, gas-insulated switchgear, and substations. These sophisticated solutions are pivotal across diverse industries, including energy and chemical sectors, metal smelting, electricity grids, industrial manufacturing, academic institutions, healthcare, municipal commerce, water conservancy, road traffic systems, and both commercial and residential developments.
With a staunch commitment to technological innovation and a visionary 'smart manufacturing' philosophy, we actively recruit top-tier technical talent to amplify our core capabilities. Our relentless pursuit of excellence is driven by a customer-centric approach, ensuring the highest value is delivered at every touchpoint. Since our inception, we have transformed from humble beginnings into a beacon of excellence, adhering to a modern business ethos: prioritizing quality for survival, reputation for development, and management for efficiency. Guided by principles of 'technology as the guide, standardized management, excellent quality, and customer satisfaction,' we enhance our market presence and aim to excel in serving China's electric power and grid domains with agile, robust, and ambitious objectives. Integrity and quality are our cornerstones, service our pinnacle, and customer satisfaction our unwavering vow. We are relentless in our pursuit of excellence, committed to perpetual innovation, and dedicated to building a brand that commands trust. Your trust fuels our passion, and we extend our heartfelt gratitude to all patrons, both longstanding and new. Together with Senhang Technology, we eagerly anticipate crafting a brighter, shared future.
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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