Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse stand as paragons of outdoor high-voltage electrical protection excellence. Precision-engineered, these vital devices are strategically installed on the high-voltage side of distribution transformers or seamlessly integrated into distribution lines. They function as indispensable guardians against transformer and line short circuits, efficiently handling overload conditions while enabling smooth current opening and loading processes. Ingeniously crafted, the drop-out fuse comprises a robust insulating bracket and sophisticated fuse tubes, with static contacts securely positioned at each end, complemented by moving contacts elegantly affixed to the fuse tube extremities. The fuse tube's construction features a cutting-edge inner arc tube, paired with a durable outer layer of phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse is distinguished by its remarkable flexibility, incorporating auxiliary contacts and a meticulously designed arc chute for fluid current load operations.
Under standard operational conditions, the drop-out fuse remains securely locked in a closed position, with the fuse tube precisely tensioned for optimal performance. Upon detecting any system faults, the fault current acts with precision, swiftly blowing the fuse and generating an arc. This potent arc ignites the arc tube, decomposing substantial gas volumes to produce high pressure within the tube, creating an effective vertical wind path that skillfully stretches and elongates the arc. As the fuse blows, the moving contact gracefully releases, rotating outwards while the locking mechanism disengages, allowing the fuse tube to drop and achieve a definitive breaking position. When load pulling is required, an insulating rod is employed to draw out the moving contact while maintaining a secure connection with the static contact. With a steady application of force, auxiliary contacts are separated, generating an arc between them that stretches within the protective hood slit. The arc cover skillfully contains the gas, ensuring efficient arc extinguishment as the current reaches its zero point.
Applications and Compliance Standards
This esteemed product is meticulously engineered for application in 10 to 35KV distribution lines, branching lines, and the primary side of distribution transformers. It delivers unwavering protection against overloads and short circuits, while enabling effective separation and combination of the rated load current with superior reliability.
The meticulously crafted design of this product adheres to the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation. Its technical parameters align seamlessly with the esteemed GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In scenarios where detailed definitions are absent, strategic adjustments are made according to the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout stand as premier embodiments of outdoor high-voltage protective sophistication. Purposefully designed to connect with the incoming feeder of distribution transformers or lines, they play an essential role in safeguarding transformers and lines from short circuit incidents and overload conditions, while skillfully managing the on/off load current. The drop-out fuse cutout is composed of robust insulating insulator supports and a precision-engineered fuse tube, with static contacts fixed at both sides and moving contacts expertly installed at the ends of the fuse tube. The fuse tube features an advanced internal arc-extinguishing tube, paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is further enhanced with elastic auxiliary contacts and an arc-extinguishing enclosure for efficient on-off load current switching.
In typical operational scenarios, the fuse link ensures the fuse tube remains tightly secured in position. Upon encountering faults, the fault current efficiently melts the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing substantial gas volumes and creating high pressure to elongate the arc within the tube. Following the melting process, the moving contact loses tension, allowing the mechanism to lock as the fuse tube transitions to an open position. For cutout load switching, operators employ an insulating operating bar to pull the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact is further drawn out, an electric arc forms between them, elongating within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism efficiently expels gas to extinguish the arc as the current transitions through 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. shines as a symbol of groundbreaking innovation and unmatched excellence in the realm of electrical integration. As a dynamic high-tech enterprise, we proudly present a seasoned R&D, production, and service team, fortified by over 15 years of steadfast dedication and expertise in the industry.
Our extensive product lineup boasts high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These premium products are essential across diverse sectors, powering the energy and chemical industries, metal smelting operations, expansive electrical power grids, industrial manufacturing, and esteemed universities and research institutions. Additionally, our innovative solutions invigorate the medical and pharmaceutical fields, bolster municipal commerce, enhance water conservation and hydropower projects, refine road traffic systems, and uplift commercial and residential developments.
Rooted in a steadfast commitment to technological innovation and the philosophy of 'smart manufacturing,' we are focused on attracting elite technical talent to comprehensively enhance our core competitive edge. Our unwavering mission is to deliver unparalleled value to our clients, aspiring to craft the industry's most esteemed brand. From inception, we have made relentless advancements, evolving from concept to excellence. Our journey is fueled by innovation and sustained by a modern business ethos, where quality is our lifeline, market orientation is crucial, reputation-driven growth is paramount, and efficiency is achieved through strategic management. We adhere to the guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and technical talent management, diligently working to expand our market presence. Our mission is to serve China's electric power and grid transmission and distribution sectors with increasing speed, strength, and ambition. At our heart, integrity is non-negotiable, quality is inviolable, service is paramount, and customer satisfaction is our eternal commitment. Our relentless pursuit of excellence, continuous innovation, and dedication to establishing a trustworthy brand remain our guiding principles. Your recognition fuels our progress. We express our sincere gratitude to all our loyal clients for their enduring support, and Senhang Technology eagerly looks forward to partnering with you to shape a brighter future together.
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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