Product Description
General
Our Drop-out Fuse and Load Pull Drop-out Fuse are essential outdoor high-voltage protection devices. Strategically positioned on the high-voltage side of distribution transformers or as key links in distribution lines, these fuses stand guard against short circuits, overloads, and manage open and co-load currents with finesse. The drop-out fuse is ingeniously constructed using an insulating bracket and robust fuse tubes. Static contacts are securely positioned at each end of the insulation bracket, while moving contacts are meticulously affixed at the ends of the fuse tube. The fuse tube itself is a marvel, crafted from an inner arc tube and an outer sheath of either phenolic paper or epoxy glass cloth. The pull load drop-out fuse is further enhanced with flexible auxiliary contacts and an arc chute, ensuring seamless open and co-load current management.
In standard operation, our drop-out fuse maintains a closed position, with the fuse tube kept under tension. Should a system fault arise, the fault current swiftly melts the fuse, creating an arc. This arc interacts with the arc tube, generating copious gas and high pressure within, which propels a vertical wind through the tube, rapidly elongating the arc. Once the fuse melts, the moving contact loses tension, triggering the locking mechanism to release the fuse tube, which then drops, marking the breaking position. During load pulls, an insulating rod is employed to disengage the moving contact. At this juncture, the moving and static contacts remain in touch. Continued pulling detaches the auxiliary contacts, creating an arc between them, which stretches within the hood slit. The arc cover, infused with gas, snuffs out the arc as the current reaches zero.
Use and Standards
Our product excels in 10 ~ 35KV distribution lines, branching lines, and on the primary side of distribution transformers, providing robust overload and short circuit protection, as well as proficiently separating and combining rated load currents.
Crafted to perfection, this product adheres to the JB/T8321-1996 Method of type AC high-voltage fuses. Its parameters are defined by the GB15166.3-1994 high voltage fuses Expulsion fuses standards. While these standards may not specify critical parameters and configurations, adjustments are made according to JB/DQ2139-198610 ~ 35KV outdoor high voltage drop fuse interim technology requirements.
Our Drop-out Fuse Cutout and Load Switching Fuse Cutout are high-performance, outdoor high-voltage protective devices. They seamlessly connect with the incoming feeder of distribution transformers or lines, offering crucial protection against short circuits and overloads, while expertly managing on/off load currents. Each cutout is engineered with insulating insulator supports and a fuse tube. Static contacts are precisely fixed on both sides of the insulator support, and moving contacts are strategically placed at the ends of the fuse tube. The fuse tube itself is composed of an inner arc-extinguishing tube, encased in an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout features reinforced elastic auxiliary contacts and an arc-extinguishing enclosure for effective on-off load current switching.
Under normal conditions, the fuse link secures the fuse tube, maintaining a close position. When faults occur, the fault current swiftly melts the fuse, generating an electric arc. This interaction heats the arc-extinguishing tube, releasing a surge of gas that creates high pressure and directs the arc along the tube. Once the fuse link melts, the moving contact loses its tension, locking the mechanism and allowing the fuse tube to drop out, transitioning the cutout to an open position. If switching off during cutout loading is necessary, the operator uses an insulating bar to disengage the moving contact. Initially, the main and auxiliary static contacts remain in contact. As the auxiliary contacts separate, an electric arc forms, lengthening within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing gas extinguishes the arc as the current approaches 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 beacon in the realm of electrical integration, recognized as a high-tech enterprise. With a team steeped in over 15 years of industry expertise, our professionals excel in R&D, production, and service, ensuring a cutting-edge experience for our valued clientele.
Our diverse product range includes high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, gas-insulated switchgear, and substations. These products seamlessly integrate into a multitude of sectors such as energy and chemical industries, metal smelting, electric power grids, and industrial manufacturing. Additionally, they support universities, research institutions, the medical and pharmaceutical fields, municipal commerce, water conservancy and hydropower, road traffic, as well as commercial and residential areas, affirming our commitment to versatile solutions.
Rooted in a philosophy of 'smart manufacturing' and technological innovation, we are dedicated to elevating our competitive edge by recruiting top-tier technical talent. This strategic approach not only enhances our core capabilities but also ensures we offer unparalleled value to our customers, aspiring to become the industry's preeminent brand. Since our inception, our trajectory has been one of consistent progress—from inception to excellence. We steadfastly uphold innovation, quality, and reputation as the pillars of our business model: quality fuels survival, reputation sparks development, and efficient management drives success. Our commitment is manifest in our mantra: 'guided by technology, standardized management, exceptional quality, and customer satisfaction.' We tirelessly strive to push the boundaries in the transmission and distribution fields of China's electric power sector. At our core, integrity forms our foundation, quality is our priority, and exemplary service is our promise. Customer satisfaction is our eternal mission. As we pursue excellence, embrace innovation, and build a brand defined by trustworthiness, your recognition fuels our ambition. We extend our heartfelt gratitude to both new and loyal customers for their unwavering support. Together with Senhang Technology, we eagerly anticipate forging a shared path toward a brighter future.
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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