Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage electrical protection. These expertly crafted devices are strategically positioned on the high-voltage side of distribution transformers or as critical support links within distribution lines, serving as paramount guardians against transformer and line short circuits and overload conditions. Designed with exceptional innovation, the drop-out fuse comprises an insulating bracket and robust fuse tubes, which securely hold static contacts at each end, while elegantly attached moving contacts grace the ends of the fuse tube. The fuse tube is engineered with an advanced inner arc tube, complemented by a resilient outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse showcases its remarkable versatility, featuring auxiliary contacts and a meticulously crafted arc chute for seamless current load transitions.
During standard operations, the drop-out fuse remains securely fastened in a closed position, with the fuse tube under precise tension. When system anomalies are detected, the fault current rapidly acts to blow the fuse, initiating a vigorous arc. This ignites the arc tube, resulting in the decomposition of gas and the creation of high pressure within the tube, forging a vertical wind path that expertly stretches and elongates the arc. As the fuse blows, the moving contact releases with grace, rotating outward while the locking mechanism disengages, allowing the fuse tube to drop and secure a decisive breaking position. For load pulling, an insulating rod is utilized to draw out the moving contact while maintaining linkage with the static contact. Continuous force application causes auxiliary contacts to separate, generating an arc that extends within the hood slit while the arc cover contains the gas, facilitating efficient arc extinguishment as the current nears zero.
Applications and Compliance Standards
This distinguished product is intricately designed for deployment in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It provides steadfast protection against overloads and short circuits, ensuring effective separation and combination of the rated load current.
The precision-engineered design of this product complies with the rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters align seamlessly with the esteemed GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In scenarios lacking detailed definitions, adjustments are meticulously tailored 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 exemplify high-performing outdoor high-voltage protective devices. Meticulously designed to connect with the incoming feeder of distribution transformers or lines, they serve an indispensable role in safeguarding transformers and lines from short circuit incidents and overload conditions, while adeptly managing the on/off load current. The drop-out fuse cutout features robust insulating supports and a fuse tube, with static contacts strategically fixed on both sides and moving contacts expertly affixed at the ends of the fuse tube. The fuse tube boasts a sophisticated internal arc-extinguishing tube, complemented by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout further incorporates high-performance, elastic auxiliary contacts, and an efficient arc-extinguishing enclosure for seamless on-off load current switching.
In typical operational scenarios, the fuse link ensures the fuse tube remains securely closed. Upon encountering faults, the fault current swiftly melts the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing substantial gas volumes to create high pressure and elongate the arc within the tube. Once the fuse is melted, the moving contact loses tension, allowing the mechanism to lock, and the fuse tube to gracefully drop out, transitioning to an open position. For cutout load switching, operators deftly utilize an insulating operating bar to draw the moving contact, with the main contact initially engaged with the auxiliary static contact. As the auxiliary contact is further drawn, an electric arc forms between them, extending within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to efficiently 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. stands tall as a luminary of pioneering innovation and unmatched distinction within the ever-evolving world of electrical integration. As a dynamic high-tech enterprise, we proudly present a team of seasoned R&D experts, production maestros, and dedicated service professionals, fortified by over 15 years of steadfast commitment and industry knowledge.
Our extensive product portfolio boasts advanced high-voltage solid-state soft starters, cutting-edge capacitor cabinets, versatile high and low voltage switchgear, groundbreaking gas-insulated switchgear, and robust substations. These exceptional products are essential across a multitude of sectors, driving progress in the energy and chemical industries, metal smelting enterprises, expansive electrical power networks, industrial manufacturing sectors, and esteemed universities and research facilities. Moreover, our innovative solutions empower the medical and pharmaceutical realms, bolster municipal commerce, enhance water conservation and hydropower initiatives, optimize traffic systems, and elevate commercial and residential infrastructures.
Rooted in a steadfast commitment to technological advancement and the ethos of 'smart manufacturing,' we are determined to attract elite technical talent to significantly bolster our core competitive edge. Our unwavering mission is to deliver unparalleled value to our clients and to sculpt the industry's most esteemed brand. From our inception, we have relentlessly advanced, transitioning from inception to excellence. Our odyssey is paved with innovation and sustained by a contemporary business philosophy where quality is our lifeblood, market orientation is pivotal, reputation-driven growth is imperative, and efficiency is achieved through strategic management. We adhere unwaveringly to the guiding tenets of 'technology as the compass, standardized management, exceptional quality, and customer satisfaction' in our quality and technical talent management, assiduously working to widen our market footprint. Our mission is to serve China's electrical power and grid transmission and distribution sectors with increasing velocity, vigor, and audacity. At our core, integrity remains inviolable, quality is sacred, service reigns supreme, and customer satisfaction is our eternal vow. Our relentless quest for excellence, ceaseless innovation, and commitment to forging a reliable brand remain our guiding lights. Your recognition fuels our advancement. We express our profound gratitude to all our loyal clients for their unwavering support, and Senhang Technology eagerly looks forward to partnering with you to carve 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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