Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse represent the pinnacle of outdoor high-voltage electrical protection. Meticulously designed, these devices are strategically positioned on the high-voltage side of distribution transformers or serve as essential links in distribution lines. Acting as critical safeguards, they offer protection against transformer and line short circuits and overload conditions, ensuring the seamless handling of current opening and loading. Ingeniously crafted, the drop-out fuse encompasses an insulating bracket and fuse tubes, with static contacts firmly mounted at each end and moving contacts elegantly affixed to the ends of the fuse tube. The construction features an intricate inner arc tube alongside a robust outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse distinguishes itself with superior flexibility, integrating auxiliary contacts and an arc chute precisely engineered for smooth current load operations.
During standard operations, the drop-out fuse remains securely locked in a closed position, with the fuse tube expertly tensioned. Upon fault detection, the fault current promptly activates, blowing the fuse and igniting an arc. This dynamic arc activates the arc tube, decomposing large gas volumes and generating significant pressure within the tube to form a vertical wind path that skillfully stretches and elongates the arc. As the fuse blows, the moving contact releases, rotating gracefully outward while the locking mechanism disengages, allowing the fuse tube to drop and establish a definitive breaking position. For load pulling, an insulating rod is employed to draw out the moving contact while maintaining a connection with the static contact. With continuous force application, auxiliary contacts separate, generating an arc between them that stretches within the hood slit. The arc cover adeptly contains the gas, enabling efficient arc extinguishment as the current approaches zero.
Applications and Compliance Standards
This distinguished product is expertly designed for application in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It provides unwavering protection against overloads and short circuits while facilitating the effective separation and combination of the rated load current.
The meticulously engineered design of this product adheres to the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters align with the prestigious GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In scenarios where detailed definitions are absent, adjustments are crafted 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 outdoor high-voltage protective devices. Intentionally crafted to connect with the incoming feeder of distribution transformers or lines, they play a vital 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 comprises robust insulating insulator supports and a fuse tube, with static contacts fixed on both sides and moving contacts expertly installed at the ends of the fuse tube. The fuse tube features a sophisticated internal arc-extinguishing tube paired with an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also includes enhanced, elastic auxiliary contacts and an arc-extinguishing enclosure for efficient on-off load current switching.
In standard operational scenarios, the fuse link ensures the fuse tube remains tightly closed. Upon encountering faults, the fault current swiftly melts the fuse, producing 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 lock, and the fuse tube to drop out, transitioning 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 pulled, an electric arc forms between them, elongating within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to efficiently extinguish the arc as the current crosses 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 beacon of groundbreaking innovation and unrivaled excellence in the realm of electrical integration. As a dynamic high-tech enterprise, we proudly present a highly experienced R&D, production, and service team, fueled by over 15 years of steadfast dedication and industry expertise.
Our extensive product lineup features high-voltage solid-state soft starters, advanced capacitor cabinets, both high and low voltage switchgear, cutting-edge gas-insulated switchgear, and durable substations. These premium products serve essential roles across a wide array of sectors, including the energy and chemical industries, metal smelting operations, extensive electrical power grids, industrial manufacturing, and leading universities and research institutions. Additionally, our solutions power the medical and pharmaceutical fields, bolster municipal commerce, enhance water conservation and hydropower initiatives, streamline road traffic systems, and elevate both commercial and residential developments.
Rooted in a steadfast commitment to technological innovation and a philosophy of 'smart manufacturing,' we are dedicated to attracting elite technical talent to comprehensively fortify our core competitive edge. Our dedication is unwavering in delivering unparalleled value to our clients, with an aspiration to cultivate the industry's most esteemed brand. From our inception, we have made relentless strides, advancing from inception to excellence. Our journey is marked by innovation and sustained by a modern business ethos, where quality is our lifeline, market orientation is vital, reputation-driven growth is paramount, and efficiency is achieved through strategic management. We adhere strictly to the guiding principles of 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' in our quality and technical talent management, diligently expanding 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 core, integrity is non-negotiable, quality is sacrosanct, service is sovereign, and customer satisfaction remains our enduring creed. Our relentless pursuit of excellence, constant innovation, and commitment to building a trustworthy brand are our guiding tenets. Your recognition propels our progress, and we extend heartfelt gratitude to all our loyal clients for their enduring support. 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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