Product Description
General
The drop-out fuse and pull load drop-out fuse are paramount outdoor high-voltage protection devices, meticulously designed to safeguard electric systems. Strategically positioned on the high-voltage side of distribution transformers or within distribution lines, these fuses deliver unparalleled protection against transformer and line short circuits, as well as overloads. They are adept at managing open-circuit load currents with precision. The construction is robust, featuring an insulating bracket and fuse tubes; the static contact is secured firmly at each end of the insulation bracket, while the moving contact is at the extremities of the fuse tube. The fuse tube is ingeniously designed with an inner arc tube encased by an outer layer of phenolic paper tube or an epoxy glass cloth tube. Designed for operational excellence, the pull load drop-out fuse is enhanced with agile auxiliary contacts and an arc chute, greatly improving its operational flexibility, especially when handling open or co-load currents.
During standard operations, the drop-out fuse remains closed, ensuring the fuse tube and fuse are tightly secured. When a system fault occurs, the fault current quickly melts the fuse, creating an arc. This arc generates intense heat, causing gas to be expelled from the arc tube, which increases the pressure inside the tube. This initiates a vertical airflow along the pipeline, skillfully stretching and lengthening the arc. As the fuse blows, the tension of the moving contact is released, triggering the locking mechanism and releasing the fuse tube, coaxing it into the breaking position. For load pulling, an insulating rod is employed to disengage the moving contact, initially maintaining contact with the static contact. Persistent pulling with the insulating rod causes the auxiliary contacts to detach, forming and elongating an arc within the hood slit. The arc cover's gas aids in the arc's extinction when the current reaches zero.
Use and Standards
With a brilliant design tailored for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers, this product acts as a fortress against overloads and short circuits. It skillfully manages the separation and union of rated load currents, ensuring operational reliability and safety.
Crafted to align with exemplary standards, the product model conforms to the JB/T8321-1996 Method for type AC high-voltage fuses preparation. Engineered with precision, it meets the rigorous GB15166.3-1994 high voltage fuses expulsion fuses standards. In cases where standards ambiguously define critical parameters and configurations, precision adjustments are implemented in accordance with JB/DQ2139-1986 requirements for 10 ~ 35KV outdoor high voltage drop fuses interim technology.
Drop-out fuse cutouts and load switching fuse cutouts are indispensable for outdoor high voltage protection. Seamlessly integrated into the incoming feeder of distribution transformers or distribution lines, they provide essential defense against short circuits and overloads, efficiently managing on/off loading currents. The drop-out fuse cutout features insulate insulator supports and a fuse tube; static contacts are securely placed on either side of the insulator support, while moving contacts rest at the ends of the fuse tube. The fuse tube's intricate design includes an inner arc-extinguishing tube, encased by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout boasts robust elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring proficient management of on-off loading currents.
Under normal operating conditions, the fuse link ensures that the fuse tube remains securely closed. When faults occur, fault currents rapidly melt the fuse, creating an electric arc that heats the arc-extinguishing tube, releasing copious gas. This high pressure propels the arc along the tube. Once the fuse link melts, the moving contact loses tension, triggering the locking mechanism, and the fuse tube drops out, transitioning the cutout to an open state. To switch off during cutout loading, operators use an insulating bar to pull the moving contact. Initially, the main contact and auxiliary static contact stay engaged, but further pulling disengages the auxiliary contacts, generating an electric arc that elongates within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism releases gas, ensuring the arc is extinguished as the current hits 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 as a shining beacon of excellence within the intricate realm of electrical integration. Recognized as a prestigious high-tech enterprise, we are deeply committed to fostering innovation, supported by our distinguished team that excels in research and development, production, and service. With an impressive legacy of over 15 years, we are not merely participants in the industry; we are revolutionaries, setting new and unprecedented standards of excellence and innovation.
Our diverse product range stands as a testament to our unwavering commitment to excellence. Featuring premium high-voltage solid-state soft starters, sophisticated capacitor cabinets, versatile high and low voltage switchgear, and cutting-edge gas-insulated switchgear, we redefine what's possible. Additionally, we provide state-of-the-art substations tailored to meet a myriad of industry needs. Our innovative solutions are indispensable across dynamic energy and chemical sectors, robust metal smelting, and expansive electric power grids, reshaping their capabilities. Our advanced offerings play a critical role in industrial manufacturing, esteemed universities, pioneering research entities, and thriving medical and pharmaceutical sectors. In municipal commerce, water conservancy and hydropower, road traffic systems, and a wide array of commercial and residential areas, our products stand as paragons of reliability and efficiency, delivering unmatched performance and peace of mind.
At Zhejiang ChaoTai, our steadfast commitment to technological innovation and a progressive 'smart manufacturing' philosophy fuels our drive to attract top-tier technical talent. This empowers us to enhance our core competitiveness, providing unparalleled value to clients while reinforcing our status as an industry leader. From humble beginnings, we have embarked on an extraordinary journey of growth, embracing a contemporary business model rooted in quality, market foresight, and efficiency through meticulous management. Our ethos is anchored in prioritizing technological advancement, adhering to standardized management practices, ensuring exceptional quality, and maintaining unwavering customer satisfaction. Integrity forms our foundation, quality serves as our strength, and customer satisfaction remains our perpetual mission. We strive to excel, innovate, and build a brand that commands trust and admiration. Our heartfelt gratitude extends to all our esteemed customers for their unwavering support and loyalty. Together with Senhang Technology, we are poised to craft a brighter, more prosperous future, hand in hand!
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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