Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse represent the zenith of outdoor high-voltage electrical protection. Expertly engineered, these devices are strategically positioned on the high-voltage side of distribution transformers or as essential support links within distribution lines. They serve as critical guardians against transformer and line short circuits, overload scenarios, and enable seamless current management for opening and loading. With a design that exudes innovation, the drop-out fuse consists of an insulating bracket and fuse tubes, securely holding static contacts at each end, while elegantly attached moving contacts grace the ends of the fuse tube. The fuse tube boasts an advanced inner arc tube, coupled with a resilient outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse is remarkable for its enhanced versatility, featuring auxiliary contacts and a meticulously crafted arc chute for smooth current load transitions.
During normal operation, the drop-out fuse remains securely fastened in a closed position, with the fuse tube under precise tension. When system faults are detected, the fault current acts with alacrity, blowing the fuse and birthing an arc. This vigorous arc ignites the arc tube, decomposing a significant volume of gas and creating high pressure within the tube to forge a vertical wind path that skillfully stretches and elongates the arc. As the fuse blows, the moving contact releases, rotating with elegance outwards while the locking mechanism disengages, allowing the fuse tube to drop and achieve a decisive breaking position. When load pulling is necessary, an insulating rod is employed to draw out the moving contact while maintaining linkage with the static contact. With continuous force application, auxiliary contacts separate, generating an arc that stretches within the hood slit. The arc cover adeptly contains the gas, facilitating efficient arc extinguishment as the current approaches zero.
Applications and Compliance Standards
This distinguished product is meticulously crafted for deployment in 10 to 35KV distribution lines, encompassing branching lines and the primary side of distribution transformers. It offers unwavering protection against overloads and short circuits while ensuring effective separation and combination of the rated load current.
The precision-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 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 the epitome of high-performance outdoor high-voltage protective devices. Meticulously designed to connect with the incoming feeder of distribution transformers or lines, they play an indispensable role in safeguarding transformers and lines from short circuit incidents and overload conditions while adeptly handling the on/off load current. The drop-out fuse cutout comprises 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 features a sophisticated internal arc-extinguishing tube, complemented by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout also incorporates high-performance, 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 closed. Upon encountering faults, the fault current swiftly melts the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing substantial volumes of gas and creating high pressure to elongate the arc within the tube. Once 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. Initially, the main contact remains 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. Simultaneously, 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 groundbreaking innovation and unparalleled excellence in the electrifying world of electrical integration. As a vibrant high-tech enterprise, we proudly present a highly experienced R&D, production, and service team, endowed with over 15 years of unwavering dedication and expertise in the industry. Our commitment to excellence is unwavering, ensuring that we are always at the forefront of cutting-edge technology and superior service.
Our expansive product range boasts high-voltage solid-state soft starters, sophisticated capacitor cabinets, both high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and resilient substations. These high-caliber products are indispensable across an array of sectors, serving the energy and chemical industries, metal smelting operations, vast electrical power grids, industrial manufacturing, and prestigious universities and research institutions. Moreover, our innovative solutions invigorate the medical and pharmaceutical fields, bolster municipal commerce, enhance water conservation and hydropower projects, optimize road traffic systems, and elevate both commercial and residential developments, making us an integral part of countless industries.
Anchored in a solid commitment to technological innovation and the ethos of 'smart manufacturing,' we are determined to attract top-tier technical talent to fortify our core competitive advantage. Our steadfast dedication is to deliver unmatched value to our clients, with the aspiration to craft the industry's most esteemed brand. From our inception, we have relentlessly progressed, evolving from excellence to eminence. Our journey is paved with 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 stringently 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. Integrity is non-negotiable, quality is inviolable, service is sovereign, and customer satisfaction is our timeless creed. Our relentless pursuit of excellence, ceaseless innovation, and commitment to building a trustworthy brand remain our guiding principles. Your recognition propels our progress, and we extend our heartfelt gratitude to all our loyal clients for their unwavering support. Senhang Technology eagerly anticipates partnering with you to forge a bright and prosperous 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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