Product Description
General
The drop-out fuse and pull load drop-out fuse serve as an indispensable outdoor high-voltage protective mechanism. Strategically installed on the high-voltage side of the distribution transformer or within the support link of the distribution line, these fuses are designed to safeguard transformers and lines against short circuits and overloads, while facilitating the smooth discharge of co-load currents. Each drop-out fuse is meticulously crafted with a robust insulating bracket and durable fuse tubes. The static contacts, securely affixed at both ends of the insulation bracket, harmonize seamlessly with the moving contacts located on each end of the fuse tube. The construction of the fuse tube itself is an engineering marvel, comprising an inner arc tube enveloped by either an outer phenolic paper tube or an epoxy glass cloth tube. This product not only enhances safety but also optimizes the flexibility of auxiliary contacts and arc chutes to manage open and co-load currents with precision.
During normal operation, the drop-out fuse stands poised in its closed position, maintained by the tension within the fuse tube. When a system malfunction arises, the fault current swiftly incinerates the fuse, generating an arc. This arc ignites a remarkable transformation within the arc tube, as large volumes of gas are released, creating a high-pressure environment. Consequently, a powerful vertical wind is generated along the pipeline, elongating the arc in a fraction of a second. Post-fuse detonation, the moving contact loses its tension and pivots outward, triggering the locking mechanism to release the fuse tube. Consequently, the fuse tube descends, marking the transition to the breaking position. For load operations, an insulating rod is adeptly employed to disengage the moving contact. At this juncture, the moving and static contacts remain connected. However, as the insulating rod continues its pull, the auxiliary contacts are deftly separated, and an arc emerges between them. This arc gracefully extends within the confines of the hood slit. Thanks to the gas within the arc cover, the arc extinguishes precisely as the current reaches zero.
Use and Standards
Our product is ideally suited for integration within 10~35KV distribution line branches and as the primary safeguard for distribution transformers. It offers robust protection against overloads and short circuits, while also facilitating the seamless separation and combination of the rated load current, ensuring optimal performance and reliability in all conditions.
The product's design and model align with the rigorous standards set by JB/T8321-1996 Method of type AC high-voltage fuses. Further refinement of product parameters adheres to the GB15166.3-1994 high voltage fuses expulsion fuses standards. Although these standards lack clarity on certain key parameters and configurations, our product is meticulously adjusted in accordance with the JB/DQ2139-1986 10~35KV outdoor high voltage drop fuse interim technology requirements, ensuring unparalleled precision and safety.
Drop-out fuse cutouts and load switching fuse cutouts are high-voltage protective devices engineered for outdoor use. Designed to interface seamlessly with the incoming feeder of distribution transformers or distribution lines, these devices offer premier protection against short circuits and overload, while enabling smooth on/off loading of currents. Constructed with insulating insulator supports and a robust fuse tube, the static contacts are securely mounted on both sides of the insulator support. The moving contact, strategically placed at the ends of the fuse tube, is part of a sophisticated assembly that includes an inside arc-extinguishing tube and either an outer phenolic compound paper tube or an epoxy glass tube. Our load switching fuse cutout boasts enforced elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring efficient current on-off management with unparalleled precision.
Under normal conditions, the fuse link maintains the fuse tube in a tightly secured closed position. If a system fault arises, the resulting fault current causes an immediate fuse melt, producing an electric arc that heats the arc-extinguishing tube, releasing a significant amount of gas. This reaction generates high pressure, propelling the arc along the tube. Once the fuse link melts, the moving contact loses its tension, the mechanism locks, and the fuse tube disengages, transitioning the cutout to its open position. During cutout loading, operators utilize an insulating operating bar to disengage the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact is progressively separated, an electric arc forms between them, extending within the arc-extinguishing enclosure gap. The arc-extinguishing system releases gas to extinguish the arc precisely as the current passes zero, ensuring safety and efficiency.
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 beacon of innovation in the realm of electrical integration. With a legacy of over 15 years of expertise, our distinguished team excels in R&D, production, and service, marking us as a formidable high-tech enterprise.
Our diverse product lineup is a testament to our engineering prowess: high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, state-of-the-art gas-insulated switchgear, and robust substations. These products have earned a reputation for excellence across a multitude of sectors, including energy, chemical industries, metal smelting, and electric power grids. Furthermore, they serve industrial manufacturing, academic and research institutions, medical and pharmaceutical sectors, and extend to municipal commerce, water conservation, hydropower, road traffic, and both commercial and residential environments.
Rooted in the principles of technological innovation and 'smart manufacturing,' we are passionately committed to enriching our core strengths by recruiting top-tier technical talents. Our mission is to deliver unparalleled value to our customers while aspiring to become the industry's leading brand. From our inception, we've cultivated a journey from inception to excellence, anchored by our resolve to innovate. We thrive on a philosophy of survival through superior quality, growth through reputation, and efficiency through meticulous management. Our guiding principles—'technology as the guide, standardized management, excellent quality, and customer satisfaction'—fortify our market competitiveness, propelling us to serve China's electric power and grid sectors with accelerated ambition. Integrity stands as our foundation, quality as our cornerstone, service as our pledge, and customer satisfaction our eternal pursuit. With a relentless drive for excellence and innovation, we are steadfast in building a trustworthy brand. Your recognition fuels our progress. We extend heartfelt gratitude to our esteemed clientele, both new and long-standing, for their unwavering support and loyalty. As Senhang Technology, we eagerly anticipate forging a future of shared success 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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