Product Description
General
The drop-out fuse and pull load drop-out fuse are indispensable outdoor high-voltage protective devices, expertly engineered to safeguard electric systems. Strategically situated on the high-voltage side of distribution transformers or along distribution lines, these fuses provide robust protection against transformer and line short circuits, alongside overloads, while adeptly handling open-circuit load currents. Boasting a sturdy construction, each device comprises an insulating bracket and fuse tubes. The static contact is securely anchored at each end of the insulation bracket, while the moving contact resides at the fuse tube's extremities. Ingeniously designed, the fuse tube incorporates an inner arc tube, enveloped by an outer phenolic paper tube or an epoxy glass cloth tube. For superior operational efficiency, the pull load drop-out fuse is equipped with nimble auxiliary contacts and an arc chute, amplifying its operational dexterity, particularly when managing open or co-load currents.
In routine operations, the drop-out fuse remains closed, ensuring the fuse tube and fuse are taut. Upon the occurrence of a system fault, the fault current swiftly melts the fuse, sparking an arc. The arc's intense heat generates a gas surge from the arc tube, escalating the pressure within the tube. This initiates a vertical airflow along the pipeline, expertly stretching and elongating the arc. As the fuse blows, the tension of the moving contact dissipates, activating the locking mechanism, which releases the fuse tube, guiding it into the breaking position. For load pulling, an insulating rod is employed to disengage the moving contact, initially retaining its connection with the static contact. Continued pulling with the insulating rod leads to the auxiliary contacts detaching, forming and elongating an arc within the hood slit. The gas from the arc cover assists in extinguishing the arc when the current reaches zero.
Use and Standards
This product dazzles with a smart design tailored for 10 ~ 35KV distribution lines, branching lines, and the primary sides of distribution transformers. It stands as a formidable guardian against overloads and short circuits, while adeptly managing the separation and union of rated load currents.
Conforming to impeccable standards, the product model aligns with the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is carefully crafted to meet the rigorous GB15166.3-1994 high voltage fuses expulsion fuses standards. In instances where standards ambiguously define essential parameters and configurations, precise adjustments are carried out 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 vital components 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 insulating insulator supports and a fuse tube; static contacts are securely positioned on either side of the insulator support, while moving contacts rest at the ends of the fuse tube. The sophisticated design of the fuse tube includes an inner arc-extinguishing tube, enclosed by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout boasts resilient elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring proficient management of on-off loading currents.
Under standard operating conditions, the fuse link ensures the fuse tube remains securely closed. When faults occur, fault currents swiftly melt the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing abundant gas. This surge in pressure propels the arc along the tube. Once the fuse link melts, the moving contact loses tension, prompting the mechanism to lock, 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 remain engaged, but continued 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 reaches 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 an illustrious leader in the world of electrical integration. As a venerated high-tech enterprise, our unwavering commitment to innovation is propelled by a distinguished team renowned in R&D, production, and service excellence. With an impressive legacy spanning over 15 enriching years, we continue to revolutionize the industry, setting unprecedented benchmarks of quality and advancement.
Our diverse product range embodies our unwavering dedication to superiority, presenting a collection of premium high-voltage solid-state soft starters, advanced capacitor cabinets, and versatile high and low voltage switchgear, alongside pioneering gas-insulated switchgear. We also offer cutting-edge substations, all expertly designed to cater to a wide array of industry demands. From dynamic energy and chemical sectors to robust metal smelting and the expansive electric power grids, our solutions push the boundaries of what is possible. Our forward-thinking products are essential in industrial manufacturing, esteemed universities, leading research institutes, and flourishing medical and pharmaceutical sectors. In municipal commerce, water conservancy, and hydropower, road traffic systems, and a plethora of commercial and residential areas, our products stand out for their unmatched reliability and efficiency.
At Zhejiang ChaoTai, our unwavering devotion to technological innovation, coupled with a visionary 'smart manufacturing' philosophy, empowers us to attract top-tier technical talent. This strategy enhances our core competitive edge, enabling us to provide unparalleled value to our clients while reinforcing our standing as an industry forerunner. From modest beginnings, we've embarked on a remarkable journey of growth, embracing a modern business model founded on quality, market acumen, and efficiency through scrupulous management. Our ethos prioritizes technology, adheres to standardized management, ensures exceptional quality, and guarantees customer satisfaction. With integrity as our cornerstone, quality as our hallmark, and customer fulfillment as our ongoing mission, we aim to excel, innovate, and forge a brand synonymous with trust. We extend our heartfelt gratitude to all our esteemed customers for their steadfast support and loyalty. Together with Senhang Technology, we are set to shape a promising 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.
Audited Supplier 
){kind=link}