Product Description
General
Our Drop-out Fuse and Pull Load Drop-out Fuse are cutting-edge outdoor high-voltage protection devices designed for optimal electrical safety. Strategically installed on the high-voltage side of distribution transformers or as Support Links on distribution lines, they serve as robust protectors against short circuits and overloads. They ensure seamless opening and current load management. Constructed with a durable insulating bracket and fuse tubes, they feature static contacts at both ends of the insulation bracket and moving contacts at the ends of the fuse tube. The fuse tube, crafted from an inner arc tube and an outer phenolic paper tube or epoxy glass cloth tube, provides enhanced durability. Our Pull Load Drop-out Fuse is engineered for superior performance with flexible auxiliary contacts and an arc chute, streamlining co-load current operations.
During regular operations, the drop-out fuse remains securely in a closed position, maintained by the fuse tube's tension. In the event of a system failure, the fault current swiftly blows the fuse, creating an arc. This arc ignites the arc tube, releasing a surge of gas and forming high pressure within the tube. This high pressure generates a powerful vertical wind within the pipeline, swiftly stretching and elongating the arc. Once the fuse has blown, the moving contact loses tension, triggering the locking mechanism to release the fuse tube, which then drops to form a breaking position. For load switching, an insulating rod pulls the moving contact. Initially, the moving and static contacts remain in contact, but further pulling separates the auxiliary contacts. An arc emerges between these contacts, stretching through the hood slit. As gas is released from the arc cover, the arc extinguishes when the current reaches zero.
Use and Standards
Engineered for 10 to 35KV distribution lines and transformers, this product offers robust primary side protection against overloads and short circuits. It enables efficient separation and combination of the rated load current, ensuring operational reliability and safety.
The product model adheres to the JB/T8321-1996 method for AC high-voltage fuses. It is crafted following the GB15166.3-1994 standards for high-voltage expulsion fuses. Although key parameters and configurations are not explicitly defined, adjustments are made according to JB/DQ2139-1986 specifications for 10 to 35KV outdoor high-voltage drop fuses to meet interim technology requirements.
Drop-out Fuse Cutout and Load Switching Fuse Cutout are advanced outdoor high-voltage protective devices. They are designed to connect with the incoming feeder of distribution transformers or lines, providing superior protection against short circuits and overloads while managing on/off loading current. The Drop-out Fuse Cutout is composed of insulating supports and a fuse tube, with static contacts secured on both sides of the insulator support and moving contacts affixed to the fuse tube ends. The fuse tube incorporates an inside arc-extinguishing tube, enveloped by an outer phenolic compound paper tube or epoxy glass tube. The load-switching fuse cutout is enhanced with enforced elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring efficient on-off load current management.
During normal operations, the fuse link secures the fuse tube in a closed position. Upon system faults, the fault current melts the fuse immediately, generating an electric arc. This process heats the arc-extinguishing tube, causing it to release a substantial amount of gas and creating high pressure. This pressure drives the arc along the tube. Once the fuse link melts, the moving contact loses tension, activating the locking mechanism and allowing the fuse tube to drop, opening the cutout. For load switching, the operator uses an insulating operating bar to pull the moving contact. Initially, the main and auxiliary contacts remain connected, but continued pulling separates the auxiliary contacts, generating an arc between them. This arc lengthens within the arc-extinguishing enclosure gap, and as gas is expelled, the arc is extinguished when 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 a beacon of innovation and excellence in the realm of electrical integration. As a high-tech enterprise, we boast a dedicated R&D, production, and service team, backed by over 15 years of profound industry expertise.
Our diverse product range features high-voltage solid-state soft starters, capacitor cabinets, high and low voltage switchgear, advanced gas-insulated switchgear, and state-of-the-art substations. Deployed across a multitude of sectors, our solutions are pivotal in the energy and chemical industries, metal smelting, and power grid operations. They are integral to industrial manufacturing, academic research at universities, medical and pharmaceutical advancements, municipal commerce, water conservancy and hydropower projects, road traffic management, as well as commercial and residential developments.
At Zhejiang ChaoTai, innovation is more than a philosophy—it's our legacy. Embracing 'smart manufacturing,' we continuously infuse our team with high-level technical talents, ensuring our core competitiveness remains unmatched. Our relentless pursuit of creating an industry-leading brand is rooted in our commitment to provide unparalleled value to our customers. From our humble beginnings to our current esteemed stature, we have evolved by prioritizing quality, reputation, and management efficiency. Our guiding principles—'technology as the guide, standardized management, exceptional quality, and customer satisfaction'—fortify our market position and empower us to set ambitious goals in China's electric power and grid sectors. Integrity forms our foundation, with quality as our hallmark, supreme service our promise, and customer satisfaction our relentless pursuit. As we aim for excellence and foster continuous innovation, we invite you to join us on a journey towards a brighter future. We extend our heartfelt gratitude to both new and loyal patrons for your unwavering support. Together with Senhang Technology, let's craft a future rich with promise and success.
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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