Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are pivotal instruments for safeguarding outdoor high-voltage electrical systems. Strategically placed on the high-voltage side of distribution transformers or serving as vital connectors within distribution lines, these devices are indispensable for shielding against transformer and line short circuits as well as overload scenarios. They ensure seamless current management by adeptly orchestrating the opening and co-loading of current. Ingeniously designed, the drop-out fuse comprises an insulating bracket paired with fuse tubes. Static contacts are meticulously attached at each bracket end, while moving contacts enhance functionality at the tube's extremities. The fuse tube boasts an inner arc tube ingeniously combined with an outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse elevates operational flexibility, incorporating auxiliary contacts and an arc chute crafted for effortless current load handling.
In routine operations, the drop-out fuse remains securely in a closed state with the fuse tube under optimal tension. Upon encountering system disruptions, the fault current promptly triggers the fuse to blow, generating an arc. This arc activates the arc tube, causing a substantial release of gas that builds high pressure within the tube and creates a vertical wind path, effectively stretching and elongating the arc. Following the fuse's activation, the moving contact loses its grip, pivoting outwards as the locking mechanism disengages; thus, facilitating the fuse tube's descent to a break position. To manage load pulling, an insulating rod is utilized to engage the moving contact while maintaining its alignment with the static contact. With continued action, auxiliary contacts separate, forming an arc between them that stretches within the hood slit. The arc cover, strategically filled with gas, supports efficient arc extinguishment as the current reaches a null point.
Use and Standards
This elite product is meticulously engineered for use within 10 to 35KV distribution lines, branching lines, and on the primary end of distribution transformers. It provides formidable defense against overload and short circuit situations while facilitating the seamless separation and combination of rated load currents.
This product's refined design rigorously aligns with the JB/T8321-1996 Method for AC high-voltage fuse formulation, and its parameters faithfully adhere to the GB15166.3-1994 standards for high voltage fuses, particularly Expulsion fuses. Where standard definitions are limited, we employ adjustments in accordance with JB/DQ2139-1986 interim technical requirements tailored for 10 to 35KV outdoor high voltage drop fuses.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are distinguished as premier outdoor high-voltage protective devices. Ingeniously conceived to connect with distribution transformers' incoming feeders or lines, these devices are paramount in shielding transformers and lines from short circuit and overload incidents, all while adeptly managing on/off load currents. The drop-out fuse cutout consists of insulating insulator supports and a fuse tube, with static contacts precisely positioned on both sides of the insulator support and moving contacts strategically installed at the tube's ends. The fuse tube features an internal arc-extinguishing tube complemented by an outer phenolic compound paper tube or epoxy glass tube. Further enhancing functionality, the load switching fuse cutout incorporates elastic auxiliary contacts and an arc-extinguishing enclosure to ensure efficient on-off load current switching.
Under normal operational conditions, the fuse link ensures the fuse tube's firm closure. When faults arise, the fault current causes the fuse to melt rapidly, forming an electric arc. This process heats the arc-extinguishing tube, releasing copious gas volume, building pressure, and elongating the arc throughout the tube. After the fuse link melts, the moving contact slackens, allowing the mechanism to unlock and the fuse tube to drop out, transitioning to an open state. For load switching, operators should utilize an insulating operating bar to maneuver the moving contact. Initially, the main contact holds steady with the auxiliary static contact. As the auxiliary contact pulls further, an arc forms between the auxiliary contacts and elongates within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism expels gas to extinguish the arc effectively as the current passes through the zero point.
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. represents the zenith of visionary innovation and unparalleled excellence in the sphere of electrical integration. As a trailblazing high-tech enterprise, we pride ourselves on a seasoned Research & Development, production, and service team, honed by over 15 years of unwavering dedication and industry expertise that sets us apart.
We present an impressive array of products, including high-voltage solid-state soft starters, intricate capacitor cabinets, versatile high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and formidable substations. Our high-caliber offerings serve as the backbone to a multitude of sectors, ranging from energy and chemical industries to metal smelting operations, expansive electric power grids, and industrial manufacturing. Our reach extends to prestigious universities and research institutions, with impactful solutions that empower the medical and pharmaceutical landscapes, uplift municipal commerce, enhance water conservancy and hydropower projects, and optimize road traffic systems—all while enriching commercial and residential developments.
With roots firmly planted in a stalwart commitment to technological advancement and the ethos of 'smart manufacturing,' we are resolute in attracting top-tier technical talent to holistically amplify our company's core competitive strength. Our fervor lies in delivering unmatched value to our clients and aspiring to establish the most esteemed brand in the industry. From our very inception, we have relentlessly propelled forward, crafting a journey from inception to excellence. Our trajectory is characterized by an unwavering commitment to innovation, sustained by a contemporary business ethos that prioritizes quality as our life force, market orientation, reputation-based growth, and efficient management. Our steadfast resolve to adhere to 'technology as the guide, standardized management, exceptional quality, and customer satisfaction' ingrains these principles as our guiding tenets in quality and technical talent management, diligently working to elevate our market stature. Our mission is to serve China's electric power and grid transmission and distribution arenas with accelerating speed, robust strength, and ambitious vision. At our core, integrity is inviolable, quality remains sacred, service holds sovereignty, and customer satisfaction endures as our eternal creed. Our relentless quest for excellence, steadfast innovation, and commitment to cultivating a trustworthy brand continue as our guiding beacons. Your recognition propels our advancement, and we extend our deepest gratitude to our loyal clients for their unwavering support. Senhang Technology eagerly looks forward to partnering with you to illuminate 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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