Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse stand as shining examples of outdoor high-voltage electrical protection excellence. Expertly crafted with precision, these protective devices are strategically positioned on the high-voltage side of distribution transformers or serve as crucial support links within distribution lines. They are indispensable guardians against transformer and line short circuits and overload conditions, delivering seamless current opening and loading. Ingeniously designed, the drop-out fuse features an insulating bracket coupled with sophisticated fuse tubes, with static contacts firmly secured at each end and moving contacts gracefully attached to the fuse tube ends. The fuse tube's construction boasts an advanced inner arc tube and a robust outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse further distinguishes itself with enhanced flexibility, incorporating meticulously designed auxiliary contacts and an arc chute for smooth and efficient current load operations.
In typical operations, the drop-out fuse remains steadfastly secure in a closed position, with the fuse tube carefully tensioned. When system faults are detected, the fault current acts with precision, blowing the fuse and generating an arc. This powerful arc ignites the arc tube, causing it to decompose into large gas volumes and create high pressure inside the tube, channeling a vertical wind path that expertly stretches and elongates the arc. As the fuse blows, the moving contact releases, gracefully rotating outward while the locking mechanism disengages, permitting the fuse tube to gracefully drop and achieve a definitive breaking position. When load pulling is necessary, an insulating rod is used to draw out the moving contact while keeping the connection with the static contact intact. With continued force application, auxiliary contacts separate, generating an arc between them that extends within the hood slit. The arc cover proficiently contains the gas, ensuring efficient arc extinguishment as the current reaches zero.
Applications and Compliance Standards
This exceptional product is meticulously engineered for deployment in 10 to 35KV distribution lines, covering branching lines and the primary side of distribution transformers. It offers robust protection against overloads and short circuits while enabling effective separation and combination of the rated load current.
The precision-engineered architecture of this product conforms to the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters are congruent with the prestigious GB15166.3-1994 standards for high voltage fuses, Expulsion fuses. In scenarios where detailed definitions are absent, modifications are made in alignment 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 recognized as premier outdoor high-voltage protective devices. Specifically designed to integrate with the incoming feeder of distribution transformers or lines, they play a pivotal role in shielding transformers and lines from short circuit incidents and overload scenarios while adeptly managing the on/off load current. The drop-out fuse cutout incorporates robust insulating insulator supports and a fuse tube, with static contacts securely positioned on both sides and moving contacts skillfully mounted at the fuse tube ends. The fuse tube is constructed with a sophisticated internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout includes enhanced, elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring efficient on-off load current transitions.
In standard operational setups, the fuse link ensures the fuse tube remains tightly shut. Upon encountering faults, the fault current swiftly 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. Post-melting, the moving contact loses tension, enabling the mechanism to unlock and the fuse tube to drop, transitioning to an open state. For cutout load switching, operators use an insulating operating bar to draw the moving contact. Initially, the main contact stays engaged with the auxiliary static contact. As the auxiliary contact is further pulled, an electric arc forms between them, extending within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism expels gas to efficiently extinguish the arc as the current passes 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 cutting-edge innovation and unmatched excellence in the realm of electrical integration. As a dynamic high-tech enterprise, we proudly present an exceptionally skilled R&D, production, and service team, fortified by over 15 years of unwavering dedication and expertise in the industry.
Our diverse and extensive product lineup includes high-voltage solid-state soft starters, advanced capacitor cabinets, both high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These premium-quality products are vital across a multitude of sectors, powering the energy and chemical industries, metal smelting operations, expansive electrical power grids, industrial manufacturing, and esteemed universities and research institutions. Additionally, our solutions galvanize the medical and pharmaceutical sectors, bolster municipal commerce, enhance water conservation and hydropower initiatives, optimize road traffic systems, and transform both commercial and residential developments.
Rooted in a steadfast commitment to technological innovation and the philosophy of 'smart manufacturing,' we are resolute in attracting elite technical talent to significantly enhance our core competitive advantage. Our unwavering dedication is to deliver unparalleled value to our clients, with the aspiration to forge the industry's most esteemed brand. Since our inception, we have achieved relentless progression, maturing from inception to excellence. Our journey is one of innovation, supported by a modern business ethos where quality is our lifeline, market orientation is essential, reputation-fueled growth is critical, and efficiency is realized through strategic management. We unwaveringly adhere to the guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and talent management, diligently working to amplify our market footprint. Our mission is to serve China's electric power and grid transmission and distribution sectors with increasing speed, strength, and ambition. At our core, integrity is sacrosanct, quality is inviolable, service reigns supreme, and customer satisfaction is our enduring creed. Our relentless pursuit of excellence, constant innovation, and commitment to cultivating a trustworthy brand remain our guiding principles. Your recognition propels our progress. We extend heartfelt gratitude to all our loyal clients for their enduring support, and Senhang Technology eagerly anticipates 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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