Product Description
General
The drop-out fuse and pull load drop-out fuse serve as premier outdoor high-voltage protection devices for electrical systems. Strategically positioned on the high-voltage side of distribution transformers or as a pivotal component of distribution lines, these fuses provide unmatched short circuit and overload protection. They effectively handle open and co-load currents, ensuring operational reliability. The drop-out fuse is elegantly constructed with an insulating bracket and robust fuse tubes, featuring static contacts on both ends of the insulation bracket and moving contacts on the ends of the fuse tube. Comprising an inner arc tube and an outer phenolic paper or epoxy glass cloth tube, the fuse tube is a marvel of design. The pull load drop-out fuse offers enhanced flexibility through auxiliary contacts and an arc chute, excelling in open and co-load current applications.
In normal operation, the drop-out fuse maintains a closed position via the tensioned fuse tube. Upon system failure, the fault current swiftly blows the fuse, creating an arc. This arc ignites the arc tube, generating a large volume of gas and high pressure within, ushering a vertical wind along the pipeline. This effectively elongates the arc. Post-blowout, the loss of tension in the moving contact triggers a release in the locking mechanism, allowing the fuse tube to drop and break the circuit. For load switching, utilize an insulating rod to tactically disengage the moving contact. Initially, the moving and static contacts remain engaged; however, a continued pull separates the auxiliary contacts, prompting an arc to form and stretch within the hood slit. As the arc cover emits gas, the arc extinguishes when the current reaches zero.
Use and Standards
Ideal for 10 ~ 35KV distribution lines, branching lines, and distribution transformers' primary sides, this product excels in providing reliable overload and short circuit protection. It adeptly manages the separation and combination of rated load current, ensuring seamless operation.
This exceptional product aligns with the JB/T8321-1996 AC high-voltage fuse preparation method. Its parameters are meticulously crafted in accordance with GB15166.3-1994 standards for high voltage expulsion fuses. Despite the absence of clearly defined parameters and configurations, it adheres to JB/DQ2139-1986 10 ~ 35KV outdoor high voltage drop fuse interim technology requirements, ensuring precise and reliable performance.
The drop-out fuse cutout and load switching fuse cutout are indispensable outdoor high voltage protective devices. They seamlessly connect with incoming feeders of distribution transformers or distribution lines, offering superior protection from short circuits, overloads, and facilitating on/off loading current. Comprising insulating supports, a fuse tube, and static contacts affixed on both sides of the insulator, with moving contacts at the fuse tube ends, the design is both robust and sophisticated. The fuse tube, consisting of an inside arc-extinguishing tube and an outer phenolic compound paper or epoxy glass tube, is a testament to advanced engineering. The load switching fuse cutout is further enhanced with enforced elastic auxiliary contacts and an arc-extinguishing enclosure for efficient on-off loading current management.
Under standard conditions, the fuse link tightly secures the fuse tube in a closed position. In the event of a system fault, the fault current promptly melts the fuse, triggering an electric arc. This heats the arc-extinguishing tube, releasing a significant volume of gas, resulting in high pressure and arc elongation along the tube. Once the fuse link melts, the moving contact loses its tensile strength, initiating a locked mechanism that causes the fuse tube to drop, transitioning the cutout to an open position. For switching off during cutout loading, the operator should employ an insulating rod to pull the moving contact. Initially, the main and auxiliary static contacts remain engaged, but continued pulling separates the auxiliary contacts, creating an arc that elongates within the arc-extinguishing enclosure gap. The arc-extinguishing gas then rapidly 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 of high-tech innovation in electrical integration. With a dynamic fusion of expert R&D, advanced production capabilities, and exceptional service, we boast an impressive 15-year legacy in the industry, setting standards for quality and expertise.
Our diverse product lineup features cutting-edge high-voltage solid-state soft starters, advanced capacitor cabinets, versatile high and low voltage switchgear, innovative gas-insulated switchgear, and robust substations. These products are at the forefront of application across a myriad of sectors, including energy and chemical industries, metal smelting, electric power grids, industrial manufacturing, academic institutions, healthcare industries, municipal commerce, water conservancy projects, hydropower developments, road traffic systems, as well as commercial and residential infrastructures.
Rooted in a philosophy of relentless technological innovation and 'smart manufacturing,' we prioritize attracting top-tier technical talent to strengthen our competitive edge. Our mission is to deliver unparalleled value to our clientele and to ascend as a leading brand in the industry. From our inception, we have charted a course of continuous progress—transforming from inception to excellence. Our strategy intertwines innovation with a commitment to superior quality, a market-driven approach, reputation-based growth, and management-driven efficiency. We are dedicated to a directive of 'technology-led guidance, standardized management, superior quality, and ultimate customer satisfaction.' This ethos enhances our market presence and fortifies our dedication to advancing China's power transmission and distribution sectors with unprecedented speed, strength, and ambition. We anchor our operations in integrity, prioritize quality above all else, deliver unrivaled service, and uphold customer satisfaction as our perpetual commitment. Striving for excellence and fostering innovation, we aim to build a brand synonymous with trustworthiness. Your endorsement fuels our journey. We extend our gratitude to both new and longstanding customers for their unwavering support and partnership. Senhang Technology is eager to collaborate with you, forging a path to a brighter, prosperous 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.
Audited Supplier 
){kind=link}