Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse serve as outdoor high-voltage guardians for electrical systems. Strategically positioned on the high-voltage side of distribution transformers or as a pivotal link in distribution lines, these fuses provide exceptional protection against short circuits and overloads, while facilitating seamless current flow management. Crafted with precision, the drop-out fuse features an insulating bracket with static contacts at each end, complemented by a fuse tube that integrates both inner arc and outer phenolic paper or epoxy glass cloth tubes. Moreover, the Pull Load Drop-out Fuse is enhanced with flexible auxiliary contacts and an arc chute designed for optimal current handling efficiency.
During normal operations, the drop-out fuse maintains a secure closed position, thanks to the tension in the fuse tube. However, when system faults arise, the fault current promptly melts the fuse, generating an arc. This arc ignites the arc tube, producing a substantial volume of gas and generating high pressure within the tube. This pressure facilitates rapid arc stretching and elongation. Once the fuse is blown, the moving contact loses tension, triggering the locking mechanism to release and the fuse tube to drop, creating an open position. For load operations, an insulating rod is used to pull the moving contact. Initially, the moving and static contacts remain connected, but as the insulating rod continues to pull, the auxiliary contacts separate. An arc forms between these contacts and extends within the hood slit. The arc cover contains gas, and when the current reaches zero, the arc is extinguished.
Use and Standards
This innovative product is purposefully designed for integration with 10~35KV distribution lines branching lines and the primary side of distribution transformers. It ensures robust overload and short circuit protection while enabling seamless separation and combination of the rated load current.
The design of this product adheres to the JB/T8321-1996 methodology for AC high-voltage fuses. Additionally, product parameters are compliant with the GB15166.3-1994 high voltage fuses expulsion fuses standards. Although these standards may not explicitly define all parameters and configurations, adjustments are made according to JB/DQ2139-1986 specifications for 10~35KV outdoor high voltage drop fuse interim technology requirements.
Drop-out fuse cutouts and load switching fuse cutouts are cutting-edge outdoor high voltage protective devices. When integrated with the incoming feeder of a distribution transformer or distribution lines, they offer unparalleled protection against short circuits and overloads while managing on/off loading currents. Comprising insulate insulator supports, fuse tubes, and static contacts on insulator supports, these fuse cutouts are equipped with a moving contact installed on the fuse tube's ends. The fuse tube itself is engineered with an inner arc-extinguishing tube and an outer phenolic compound paper or epoxy glass tube. The load switching fuse cutout is further optimized with reinforced elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring efficient on-off loading current management.
In standard operational settings, the fuse link keeps the fuse tube securely closed. However, should a fault occur, the resulting fault current promptly melts the fuse link, generating an electrical arc. This arc ignites the arc-extinguishing tube, producing a significant amount of gas and creating high pressure that channels along the tube. Once the fuse link melts, the moving contact loses its tension, engaging the locking mechanism and allowing the fuse tube to drop, signifying an open position. For switching off during cutout loading, operators should use an insulating operating bar to pull the moving contact. Initially, the main and auxiliary static contacts remain connected. As the auxiliary contact is pulled further, an electric arc forms, which elongates in the arc-extinguishing enclosure gap. Simultaneously, gas from the arc-extinguishing enclosure effectively blows out 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
Welcome to Zhejiang Chaotai Complete Equipment Co., Ltd., a beacon of innovation in the realm of electrical integration. As a distinguished high-tech enterprise, we possess a dynamic team dedicated to research and development, production, and exceptional service, backed by over 15 years of profound expertise.
Our diverse product lineup includes advanced high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and comprehensive substation solutions. Our cutting-edge products have earned trust and acclaim across various sectors including energy and chemical industries, metal smelting, electric power grids, industrial manufacturing, prestigious universities and research institutions, the medical and pharmaceutical fields, municipal commerce, water conservancy and hydropower, road traffic infrastructure, as well as commercial and residential developments.
Guided by a forward-thinking philosophy of 'smart manufacturing,' we are committed to technological innovation, continuously attracting top-tier technical talent to bolster our core competencies. Our mission is to deliver unparalleled service and to forge a leading brand in the industry. From our humble beginnings, Zhejiang Chaotai has progressed to a position of excellence, driven by a commitment to innovation. We adhere to a modern business strategy that emphasizes quality as the bedrock of survival, a market-oriented approach to development, and the pursuit of efficiency through robust management practices. Our promise is to lead with technology, maintain standardization, offer superior quality, and ensure customer satisfaction, enhancing our competitive edge within the market. Our ultimate aim is to serve China's electric power and grid sectors more effectively and ambitiously. Integrity is our foundation, quality our priority, service our hallmark, and customer satisfaction our perpetual goal. We strive for excellence, embrace continuous innovation, and are dedicated to building a brand that inspires trust. Your trust propels us forward. We extend heartfelt gratitude to our valued customers for their unwavering support, and Senhang Technology eagerly anticipates collaborating with you to shape 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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