Product Description
General
The drop-out fuse, along with the pull-load drop-out fuse, represents an essential outdoor high-voltage protector. Strategically installed on the high-voltage side of distribution transformers or at pivotal points of distribution lines, it acts as a guardian against transformers and line short circuits, overloads, and enables current switching operations. Constructed from a robust insulating bracket and durable fuse tubes, the static contact is neatly positioned at both ends of the insulation bracket, while moving contacts are secured at the ends of the fuse tube. The composition of the fuse tube is a blend of an inner arc tube and an outer shell of phenolic paper or epoxy glass cloth, ensuring resilience and longevity. The pull load drop-out fuse is ingeniously designed with auxiliary contacts and an arc chute to enhance flexibility, seamlessly managing open and close load currents.
In standard operation, the drop-out fuse maintains a secure closed position, held by the tension of the fuse tube. Upon system failures, the fault current expedites fuse blowing, sparking an arc. The heat from the arc ignites the arc tube, releasing copious gas amounts under high pressure within the tube, creating a powerful vertical airflow. This phenomenon gracefully stretches and extends the arc. Once the fuse blows, the moving contact loses its tension, causing the locking mechanism to release the fuse tube, which then drops to form a breaking position. During load pulling, an insulating rod is employed to maneuver the moving contact. Initially, the moving and static contacts are in contact, but continued pulling with the rod separates the auxiliary contacts. An arc forms between these auxiliary contacts, stretching within the hood slit. With the arc cover containing the gas, the arc extinguishes promptly when the current hits zero.
Use and Standards
This product is adeptly utilized in 10 ~ 35KV distribution lines, branching lines, and on the primary side of distribution transformers, offering impeccable protection against overloads and short circuits. It skillfully manages the separation and combination of the rated load current, ensuring efficiency and safety.
Adhering to the highest standards, the product model is crafted following the JB/T8321-1996 Method of type AC high-voltage fuses preparation. Conforming to GB15166.3-1994 high voltage fuses Expulsion fuses standards, the product ensures reliability and durability. For parameters and configurations not explicitly defined, adjustments are made according to JB/DQ2139-1986 10 ~ 35KV outdoor high voltage drop fuse interim technology requirements, ensuring precision and compliance.
The drop-out fuse cutout and load switching fuse cutout are premium outdoor high voltage protective devices. They are expertly designed to connect with the incoming feeder of distribution transformers or lines, safeguarding them from short circuits, overloads, and enabling smooth on/off loading of current. The refined structure consists of insulated support and a robust fuse tube. Static contacts are securely fixed on both sides of the insulator support, with moving contacts strategically installed at the ends of the fuse tube. The fuse tube is a complex of an inside arc-extinguishing tube enveloped by an outer shell of phenolic compound paper or epoxy glass. The load switching fuse cutout comes equipped with reinforced elastic auxiliary contacts and an arc-extinguishing enclosure, facilitating efficient on-off load current switching.
During normal operations, the fuse link maintains the fuse tube in a secure closed position. Should a system fault arise, the fault current causes the fuse to melt instantly, generating an electric arc. This action heats the arc-extinguishing tube, causing a rapid release of gas, creating high pressure and directing the arc along the tube. Post fuse melting, the moving contact loses its tension, locking the mechanism and prompting the fuse tube to drop, thus shifting to an open position. For switching off during load cutout, operators employ an insulating operating bar to manipulate the moving contact. Initially, the main and auxiliary static contacts remain in contact. As the auxiliary contact is pulled, an electric arc forms between them, stretching within the arc-extinguishing enclosure gap. Meanwhile, the expulsion of gas from the arc-extinguishing enclosure efficiently 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. is a trailblazer in the realm of electrical integration, standing tall as a high-tech enterprise. Our team is an assembly of professional R&D, production, and service experts, boasting over 15 years of distinguished industry experience.
Our product suite is vast and varied, encompassing high-voltage solid-state soft starters, capacitor cabinets, sophisticated high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. Our exceptional products are deployed across a myriad of sectors, including energy and chemical industries, metal smelting enterprises, electric power grids, industrial manufacturing complexes, universities and research institutions, the medical and pharmaceutical sectors, vibrant municipal commerce, water conservancy and hydropower projects, road traffic systems, as well as diverse commercial and residential environments.
At ChaoTai, we champion the spirit of technological innovation and embrace the philosophy of "smart manufacturing." Our investment in high-caliber technical talent is relentless, aimed at amplifying the company's core strengths. This dedication enables us to deliver exceptional, value-driven services to our clients, while we endeavor to forge the industry's preeminent brand. Since our inception, our journey has been one of relentless progression—from foundations to excellence. We are steadfast in our commitment to innovation, adhering to a modern business model that prioritizes quality-driven survival, market-orientation, reputation-fueled growth, and management-enhanced efficiency. Our guiding principles are encapsulated in our commitment to 'technology as the guide, standardized management, impeccable quality, and customer satisfaction.' By enhancing our market competitiveness, we aim to elevate the transmission and distribution fields of China's electric power and grid with ever-increasing speed, strength, and ambition. We hold integrity as our core tenet, quality as our utmost priority, and service as our supreme commitment, ensuring perpetual customer satisfaction. As we pursue excellence and continuous innovation, we strive to establish a brand that is synonymous with trust. Your recognition fuels our ambition, and we extend heartfelt gratitude to every one of our loyal customers—both new and longstanding. Together with Senhang Technology, we eagerly anticipate a collaborative journey towards a brighter 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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