Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse exemplify the peak of outdoor high-voltage electrical defense. These expertly crafted devices are meticulously stationed on the high-voltage side of distribution transformers or as pivotal support elements within distribution lines. They stand as vital sentinels against transformer and line short circuits, overload scenarios, and facilitate seamless current management for both opening and loading. Boasting a design imbued with cutting-edge innovation, the drop-out fuse features an insulating bracket and fuse tubes, securely anchoring static contacts at each end, with gracefully affixed moving contacts on the ends of the fuse tube. The inner structure of the fuse tube incorporates an advanced arc tube, complemented by a durable outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse is distinguished by its exceptional adaptability, featuring auxiliary contacts and a precisely engineered arc chute that enables smooth transitions in current load.
Under standard conditions, the drop-out fuse steadfastly remains in a locked closed state, with the fuse tube precisely tensioned. In the event of system anomalies, the fault current acts swiftly, blowing the fuse and igniting an arc. This dynamic arc sets the arc tube alight, decomposing a substantial volume of gas and generating high pressure within the tube to craft a vertical wind path that expertly stretches and elongates the arc. As the fuse is blown, the moving contact elegantly rotates outward, while the locking mechanism gracefully releases, allowing the fuse tube to drop into a definitive breaking position. For load disengagement, an insulating rod is employed to extract the moving contact while maintaining engagement with the static contact. With persistent force application, auxiliary contacts detach, generating an arc that extends within the hood slit. The arc cover skillfully contains the gas, enhancing efficient arc extinguishment as the current nears zero.
Applications and Compliance Standards
This prestigious product is precisely engineered for deployment within 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It provides steadfast protection against overloads and short circuits while ensuring the effective separation and combination of the rated load current.
The meticulously engineered design of this product adheres to the strict JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters are aligned with the esteemed GB15166.3-1994 standards for high voltage fuses, specifically Expulsion fuses. In instances where specific definitions are lacking, adjustments are finely tailored in accordance with 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 are paragons of high-efficiency outdoor high-voltage protective devices. Elegantly designed to interface with the incoming feeder of distribution transformers or lines, they play an irreplaceable role in shielding transformers and lines from short circuit incidents and overload conditions, while expertly managing the on/off load current. The drop-out fuse cutout encompasses robust insulating supports and a fuse tube, with static contacts strategically anchored on both sides and moving contacts deftly affixed at the fuse tube ends. The fuse tube boasts a sophisticated internal arc-extinguishing tube, beautifully complemented by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also features high-performance, elastic auxiliary contacts and an arc-extinguishing enclosure for seamless on-off load current transitions.
In standard operational environments, the fuse link ensures that the fuse tube remains firmly closed. Upon experiencing faults, the fault current promptly melts the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing significant gas volumes and creating high pressure to elongate the arc within the tube. Once melted, the moving contact loses tension, enabling the mechanism to lock, and the fuse tube to elegantly drop out, transitioning to an open position. For cutout load switching, operators skillfully employ an insulating operating bar to maneuver the moving contact. Initially, the main contact stays engaged with the auxiliary static contact. As the auxiliary contact is further drawn out, an electric arc forms between them, extending within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to proficiently 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. is a shining beacon of innovation, consistently setting new standards of excellence in the dynamic world of electrical integration. As a forward-thinking high-tech enterprise, we proudly present our highly skilled R&D, production, and service team. With over 15 years of unwavering dedication to excellence, we have amassed expertise that sets us apart in the industry.
Our diverse and expansive product lineup includes high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, cutting-edge gas-insulated switchgear, and resilient substations. These superior products are indispensable across numerous sectors. They power the energy and chemical industries, drive metal smelting, support expansive electrical power grids, and enhance industrial manufacturing. Additionally, they serve prestigious universities, esteemed research institutions, and energize the medical and pharmaceutical fields. Our solutions underpin municipal commerce, bolster water conservation and hydropower initiatives, optimize road traffic systems, and elevate both commercial and residential developments.
With an unwavering commitment to technological innovation and guided by our 'smart manufacturing' philosophy, we are dedicated to attracting top-notch technical talent to fully enhance our core competitive edge. Our relentless focus is on delivering unparalleled value, aspiring to create the industry's most respected brand. From our very inception, we have progressed tirelessly, evolving from initiation to excellence. Our path is defined by continuous innovation and sustained by a modern business ethos where quality is our lifeline, market orientation is essential, reputation fuels growth, and efficiency is achieved through strategic management. We adhere strictly to the principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction,' ensuring our quality and technical talent management practices are second to none. Our mission is to energize China's electric power and grid transmission and distribution sectors with greater speed, strength, and ambition. At our core, integrity is non-negotiable, quality is sacrosanct, service is supreme, and customer satisfaction is our perpetual creed. Our relentless pursuit of excellence, continuous innovation, and commitment to building a trustworthy brand remain our guiding tenets. Your recognition propels our progress. We extend our heartfelt gratitude to all our loyal clients for their unwavering support, and Senhang Technology 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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