Product Description
General
The drop-out fuse and pull load drop-out fuse are paramount outdoor high-voltage protective devices, indispensable for maintaining the integrity and safety of electrical systems. These fuses are strategically positioned on the high-voltage end of distribution transformers, or serve as critical components in the web of distribution lines. Their principal purpose is to shield against transformer and line short circuits, efficiently manage overload situations, and enable seamless open-circuit load current operations. Expertly crafted with an insulating bracket paired with robust fuse tubes, the static contact is meticulously anchored at both extremities of the insulation bracket, while ingenious moving contacts are affixed at the ends of the fuse tube. The fuse tube boasts an inner arc tube, skillfully encased by either a durable phenolic paper tube or a resilient epoxy glass cloth tube. The pull load drop-out fuse is enhanced with agile auxiliary contacts and an arc chute, significantly elevating its operational dexterity during open-circuit or co-load current scenarios.
During standard operational conditions, the drop-out fuse is securely closed, with the fuse tube and fuse held under tension. In the face of a system fault, the ensuing fault current swiftly melts the fuse, igniting an arc. The arc tube, bathed in the intense heat of the arc, discharges a voluminous amount of gas, generating significant pressure within the tube. This results in a dynamic vertical wind along the pipeline, which skillfully stretches and elongates the arc. As the fuse blows, the moving contact's tension is relieved, activating the locking mechanism, liberating the fuse tube, and allowing it to transition into the breaking position. To execute a load pull, an insulating rod is utilized to disengage the moving contact. Initially maintaining connection with the static contact, continued pulling with the insulating rod eventually separates the auxiliary contacts, causing an arc to form and elongate within the hood slit. The gas within the arc cover plays a crucial role in quenching the arc when the current hits zero.
Use and Standards
This advanced product is meticulously engineered for use in 10 ~ 35KV distribution lines, branching lines, as well as on the primary side of distribution transformers. It offers unparalleled protection against overloads and short circuits, while proficiently managing the separation and integration of rated load currents.
The product model is crafted in strict adherence to the JB/T8321-1996 Method for type AC high-voltage fuses preparation. It is systematically aligned with the GB15166.3-1994 standards for high voltage fuses expulsion fuses. Where standards ambiguously define critical parameters and configurations, adjustments are made in full compliance 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 pivotal outdoor high voltage protective devices. Seamlessly integrated with the incoming feeder of distribution transformers or distribution lines, they provide essential protection against short circuits and overloads, while adeptly handling on/off loading currents. The drop-out fuse cutout comprises insulating insulator supports and a fuse tube, with static contacts securely affixed on both sides of the insulator support, while moving contacts are strategically installed at the fuse tube ends. The architecture of the fuse tube includes an inner arc-extinguishing tube, which is skillfully surrounded by an outer phenolic compound paper tube or a durable epoxy glass tube. The load switching fuse cutout is enhanced with resilient elastic auxiliary contacts and an arc-extinguishing enclosure, adeptly managing on-off loading current with precision and reliability.
Under standard working conditions, the fuse link ensures the fuse tube remains securely in a closed position. Upon the occurrence of system faults, the fault current promptly melts the fuse, igniting an electric arc that heats the arc-extinguishing tube and releases a substantial volume of gas, generating high pressure that propels the arc along the tube. When the fuse link melts, the moving contact loses tension, the mechanism locks, and the fuse tube drops out, transitioning the cutout to an open position. To switch off during cutout loading, operators employ an insulating operating bar to pull the moving contact. Initially, the main contact and auxiliary static contact remain engaged; however, further pulling results in the disengagement of the auxiliary contacts, generating an electric arc that elongates within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism releases gas to extinguish the arc as the current passes 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. proudly stands at the pinnacle of electrical integration, celebrated as a highly esteemed high-tech enterprise. Our elite team in R&D, production, and service capitalizes on an impressive legacy of over 15 years of profound expertise, driving innovation and excellence within the industry.
We offer an extraordinary array of products, featuring high-voltage solid-state soft starters, capacitor cabinets, both high and low voltage switchgear, cutting-edge gas-insulated switchgear, and state-of-the-art substations. Our groundbreaking solutions are integral to a myriad of sectors, including the dynamic realms of energy and chemical industries, resilient metal smelting, far-reaching electric power grids, and avant-garde industrial manufacturing. Our influence permeates esteemed universities, trailblazing research institutions, the burgeoning medical and pharmaceutical fields, and vibrant municipal commerce. Moreover, our expertise is indispensable to the vital water conservancy and hydropower sectors, sophisticated road traffic systems, and a diverse array of commercial and residential areas.
Driven by an unyielding quest for technological innovation and a forward-thinking 'smart manufacturing' vision, we are committed to attracting top-notch technical talent. This dedication fortifies our core competitiveness, empowering us to deliver unmatched value to our clients while aspiring to establish our brand as an industry leader. Since our humble beginnings, we've embarked on an extraordinary journey of growth toward industry prominence. Our ethos is rooted in innovation, staying true to a modern business model that thrives on quality for survival, market orientation for expansion, reputation for development, and efficiency through diligent management. Our steadfast promise is to prioritize technology as our guiding star, adhere to standardized management, deliver exceptional quality, and ensure customer satisfaction. This not only reinforces our market presence but also propels us to ambitiously serve China's electric power and grid sectors. Integrity is our foundation, quality is our strength, service is our signature, and customer satisfaction is our unwavering principle. Our enduring goals are the relentless pursuit of excellence, continual innovation, and crafting a brand that commands unwavering trust. Your recognition fuels our journey, and we extend profound gratitude to all our esteemed customers for their steadfast support and loyalty. Together with Senhang Technology, we eagerly anticipate crafting a brighter 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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