Product Description
General
Discover the ultimate in outdoor high-voltage protection with our Drop-out Fuse and Load Drop-out Fuse. Expertly designed for installation on the high-voltage side of distribution transformers or as a support link in distribution lines, these fuses offer robust short circuit and overload protection for transformers and lines. Crafted with precision, the drop-out fuse features an insulating bracket and fuse tubes, with static contacts securely positioned at each end. The innovative moving contacts are located at the ends of the fuse tube, which consists of an inner arc tube surrounded by a protective phenolic paper or epoxy glass cloth tube. Our pull load drop-out fuse enhances operational flexibility through auxiliary contacts and an arc chute for optimized current handling capabilities.
Experience seamless operation with our drop-out fuse, which maintains a closed position under normal conditions through the tension in the fuse tube. In the event of a system fault, the fault current promptly blows the fuse, generating an arc. This causes the arc tube to decompose large quantities of gas, creating high pressure and a vertical wind effect to swiftly elongate and extinguish the arc. Once the fuse blows, the moving contact loses tension, activating the locking mechanism that releases the fuse tube, thereby forming a break in the circuit. For load handling, use an insulating rod to pull the moving contact. Initially, the moving and static contacts remain engaged; however, continued pulling with the insulating rod causes the auxiliary contacts to separate. An arc appears between the auxiliary contacts and is stretched within the hood slit. Gas expelled from the arc cover extinguishes the arc when the current reaches zero.
Use and Standards
Engineered for excellence, this product is designed for application in 10 ~ 35KV distribution lines, branching lines, and the primary side of distribution transformers. It provides reliable overload and short circuit protection while enabling seamless separation and combination of rated load currents.
Our product models comply with the JB/T8321-1996 standards for AC high-voltage fuses, with parameters crafted according to GB15166.3-1994 high voltage fuses expulsion standards. Recognizing the importance of precise configuration, we adhere to JB/DQ2139-1986 requirements for interim technology specifications for 10 ~ 35KV outdoor high-voltage drop fuses.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are sophisticated outdoor high-voltage protective devices designed to connect with incoming feeders of distribution transformers or distribution lines. Their primary function is to safeguard transformers and lines from short circuits and overloads while allowing on/off load current management. These devices are expertly constructed with insulating insulator supports and fuse tubes. Static contacts are firmly fixed on both sides of the insulator support, while moving contacts are installed on either end of the fuse tube. The fuse tube itself consists of an inner arc-extinguishing tube, enveloped by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is equipped with enforced elastic auxiliary contacts and an arc-extinguishing enclosure for efficient current switching.
In regular operations, the fuse link secures the fuse tube in a closed position. Upon detection of system faults, the fault current immediately melts the fuse, creating an electric arc. This arc heats the arc-extinguishing tube, triggering the release of gas, which produces high pressure and guides the arc along the tube. Once the fuse link melts, the moving contact loses tension, the locking mechanism activates, and the fuse tube drops out, transitioning the cutout to an open position. To switch off during cutout loading, operators should employ an insulating operating bar to pull the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As pulling continues, the auxiliary contacts separate, forming an electric arc that is elongated within the arc-extinguishing enclosure gap. Simultaneously, gas expelled during zero-current flow extinguishes the arc.
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 in the realm of electrical integration. As a distinguished high-tech enterprise, we take pride in our exceptional R&D, production, and service teams, each boasting over 15 years of unrivaled expertise.
Our impressive lineup of cutting-edge products includes high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, advanced gas-insulated switchgear, and robust substations. Our high-performance solutions find extensive application across diverse sectors like energy and chemicals, metal smelting, power grids, industrial manufacturing, as well as educational institutions, healthcare, municipal commerce, water conservancy, hydropower, transportation networks, and both commercial and residential sectors.
Guided by a philosophy of relentless technological innovation and 'smart manufacturing,' we proactively recruit top-tier technical talent to amplify our core strengths. Our mission is to consistently deliver unparalleled service quality and to forge the most esteemed brand in the industry. Since our inception, we've transformed challenges into triumphs, advancing from foundational stages to industry leadership. Our commitment to innovation is steadfast, supported by a strategic approach that emphasizes quality for survival, reputation for growth, and efficient management for profit. Our core commitment remains 'technology leadership, adherence to standards, superior quality, and customer satisfaction,' which fuels our competitive edge in the market. Our mission: to power China's electric grid and transmission fields with utmost precision and excellence. We believe in integrity, prioritize quality, deliver supreme service, and uphold customer satisfaction as our eternal principles. Our unwavering goals include pursuing excellence, fostering innovation, and establishing a brand synonymous with trust. Your trust inspires us. We extend heartfelt gratitude to our loyal clientele for their unwavering support and look forward to collaborative growth with you, shaping a future filled with promise.
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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