Product Description
General
The drop-out fuse and pull-load drop-out fuse serve as paramount outdoor high-voltage protection mechanisms, integral to safeguarding electrical systems. These fuses are strategically positioned on the high-voltage side of distribution transformers or as a supportive link within distribution lines, expertly shielding transformers and lines from short circuits, overloads, and enabling efficient current interruption. Crafted meticulously, the drop-out fuse features an insulating bracket and fuse tubes, with static contacts firmly affixed at both ends of the bracket, and moving contacts securely positioned on the fuse tube ends. The innovative fuse tube consists of an ingeniously designed inner arc tube and an exterior crafted from superior phenolic paper or epoxy glass cloth. The pull-load drop-out fuse further enhances flexibility with its auxiliary contacts and sophisticated arc chute, optimizing current interruption and ensuring safety.
During regular operations, the drop-out fuse maintains a closed position, secured by the tension in the fuse tube. However, when a system fault occurs, the fault current swiftly triggers the fuse to blow, creating an arc. This arc is met with the tube's robust arc-extinguishing capabilities, generating a substantial amount of gas that escalates pressure, propelling the arc along the tube. This rapid elongation quashes the arc, leaving the moving contact without tension. Consequently, the locking mechanism releases, allowing the fuse tube to drop, thus achieving a complete disconnection. For load operations, an insulating rod is utilized to pull the moving contact, ensuring that the main and static contacts remain engaged initially. As the pull continues, the auxiliary contacts disengage, with the ensuing arc being meticulously managed by the arc-extinguishing hood, which extinguishes it when the current reaches zero.
Use and Standards
This innovative product is adeptly designed for application within 10 to 35KV distribution lines, branching lines, and on the primary side of distribution transformers. It excels in providing reliable overload and short circuit protection, as well as facilitating the seamless separation and combination of rated load currents.
The product model conforms to the rigorous standards set by JB/T8321-1996 for AC high-voltage fuses. Furthermore, it adheres to the GB15166.3-1994 expulsion fuse standards, although these standards do not explicitly define all critical parameters and configurations. Any necessary adjustments are made in alignment with the interim technical requirements of JB/DQ2139-1986 for 10 to 35KV outdoor high-voltage drop fuses, ensuring optimal performance and compliance.
Both the drop-out fuse cutout and load switching fuse cutout are expertly engineered as high voltage protective devices for outdoor use. They are designed to connect with incoming feeder lines of distribution transformers or distribution networks, offering robust protection against transformer or line short circuits and overloads, and ensuring efficient load current operations. These cutouts are composed of durable insulator supports, alongside advanced fuse tubes. Static contacts are reliably secured on either side of the insulator support, while moving contacts are installed on the fuse tube ends. The fuse tube is innovatively constructed with an inner arc-extinguishing layer, complemented by an outer shell made from phenolic compound paper or epoxy glass. The load switching fuse cutout is further enhanced with reinforced elastic auxiliary contacts and a sophisticated arc-extinguishing enclosure for improved current management.
Under standard operational conditions, the fuse link ensures the fuse tube remains securely positioned, maintaining a closed state. In the event of system faults, the fault current efficiently melts the fuse, unleashing an electric arc that activates the arc-extinguishing tube. This results in a significant gas release, creating high pressure that expels the arc along the tube. Once the fuse link melts, tension on the moving contact is lost, the mechanism locks, and the fuse tube disengages, marking the transition to an open position. For load switching, operators employ an insulating bar to manipulate the moving contact. Initially, the main and auxiliary static contacts remain engaged. As the pull progresses, the auxiliary contacts separate, creating an arc that is skillfully extended within the arc-extinguishing enclosure. The enclosure releases gas to extinguish the arc as the current crosses zero, ensuring safe and effective operation.
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 innovation as a high-tech enterprise specializing in electrical integration. Boasting a dynamic and expert team in R&D, production, and service, we leverage over 15 years of rich industry expertise.
Our distinguished product line features high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. Our versatile products find their applications across a spectrum of industries including energy, chemical, metal smelting, power grids, industrial manufacturing, academia, medical and pharmaceutical sectors, municipal commerce, water conservancy and hydropower, road traffic systems, and both commercial and residential areas.
Steeped in a culture of technological innovation, Zhejiang Chaotai champions a forward-thinking development philosophy rooted in 'smart manufacturing.' Our commitment to excellence drives us to recruit top-tier technical talent, bolstering our core competitiveness and elevating our service offerings. We aspire to establish a premier brand in the industry through relentless progress—from inception to excellence. Our strategy hinges on quality-driven survival, market-oriented growth, and an unwavering commitment to reputation and management efficiency. We are dedicated to leveraging technology as a strategic guide, adhering to standardized management practices, and delivering unparalleled quality to achieve customer satisfaction. By enhancing market competitiveness, we aim to serve China's electric power and grid sectors with unparalleled speed, strength, and ambition. Integrity lays our foundation, quality is our hallmark, service is our creed, and customer satisfaction is our eternal pursuit. We are relentless in our quest for excellence, innovation, and building a brand synonymous with trust. Your trust fuels our journey, and we extend heartfelt gratitude to our loyal customers for their unwavering support. Zhejiang Chaotai eagerly anticipates forging a prosperous future together with you.
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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