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Products
1250A 20KA Vacuum Interrupter for Indoor Circuit Breaker
We are a factory specializing in the production of 1250A 20KA Vacuum interrupter for indoor circuit breaker，777 electrical technology co.,ltd custom vacuum interrupters have innovative process can prevent the arc extinguishing chamber from being affected by impact, humidity and dust.We look forward to becoming your long-term partner in China.
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Product Description
1. Product Introduction
Air arc extinguishing chamber is an electric vacuum device that uses high vacuum working insulating arc extinguishing medium and realizes the on-off function of power circuit through a pair of contacts sealed in vacuum. When it disconnects a certain value of current, at the moment when the dynamic and static contacts are separated, the current shrinks to the point where the contacts are just separated, the resistance between electrodes increases sharply, and the temperature rises rapidly until the evaporation of electrode metal occurs.1250A 20KA Vacuum Interrupter for Indoor Circuit Breaker
2. Product Parameter (Specification)
| TD-12/1250-20H(W) | |||
| Main Technical Specification | |||
| Parameter name | Unit | Value | |
| 1 | Rated frequency | Hz | 50 |
| 2 | Rated Voltage | kV | 12 |
| 3 | Rated short-time（1min） power-frequency withstand voltage | kV | 48★ |
| 4 | Rated lightning impulse withstand voltage（Peak） | kV | 85★ |
| 5 | Rated Current | A | 1250 |
| 6 | Rated short-circuit breaking current | kA | 20 |
| 7 | Rated short-circuit making current | kA | 50 |
| 8 | Rated short-time withstand current | kA | 20 |
| 9 | Rated peak withstand current | kA | 50 |
| 10 | Breakding operations of rated short circuit breaking current | Times | 30 |
| 11 | Circuit resistance at lowest rated contact force | μΩ | ≤25 |
| 12 | Rated duration of short-circuit | s | 4 |
| 13 | Closing force due to bellow and atmosphere | N | 80±30 |
| 14 | Force required to hold contacts open at full stroke | N | 100±40 |
| 15 | Mechanical endurance | Times | 10000 |
| 16 | Contacts limit erosion | mm | 3 |
| 17 | Storage life | years | 20 |
| Mechanical date of matching switchgear | |||
| 1 | Clearance between open contacts | mm | 9±1 |
| 2 | Average opening speed (0～75% contact gap) | m/s | 1.1±0.2 |
| 3 | Average closing speed(30% contact gap-contact close position) | m/s | 0.7±0.2 |
| 4 | Rated added external contact final force | N | 1800±100 |
| 5 | Contact bouncing duration at closing operation | ms | ≤2 |
| 6 | Closing and Opening non-simultaneity of three-phase contacts | ms | ≤1 |
| 7 | Maximum Rebound during opening | mm | ≤2 |
|
Meets or exceeds the electrical endurance requirements of class E2 for autoreclosing duty per IEC 62271-100 and GB1984-2014 |
|||
| Note：“★”Within transformer oil or equivalent isolation medium | |||
3. Product Feature and Application
777 electrical brand vacuum interrupter adopts corrugated ceramic insulation shell and copper tungsten tungsten carbide alloy material.
The 1250A 20KA Vacuum interrupter for outdoors circuit breaker process flow makes the vacuum interrupter have the advantages of small volume, high insulation level, low closing value, long service life and convenient maintenance. The 1250A 20KA Vacuum interrupter for outdoors circuit breaker is mainly used in power transmission and distribution control system and metallurgical industry. Mining, petroleum, chemical industry, railway, broadcasting, communication, industrial high-frequency heating and other power distribution systems.
4. Product Details
The 1250A 20KA Vacuum interrupter for outdoors circuit breaker process is the core component of the breaking part of high voltage vacuum circuit breaker.
Generally speaking, this is a satisfactory conductor power supply, and the current is interrupted immediately in case of overload and short-circuit fault to ensure insulation.
It is the most ideal arc extinguishing device.
5. Product Qualification
1250A 20KA Vacuum interrupter for outdoors circuit breaker process: CE, CCC, CQC, IP68, ISO9001-2015
Realize zero defect of products and wholeheartedly provide customers with high-quality products with stable quality, reliable performance and high added value.
6. Deliver,Shipping and Serving
1. Your inquiry will be replied within 24 hours.
2. We offer you professional service in fluent English.
3. Keep the mass production as the sample in high quality
4. Freight forwarder: faster, safer, and convenient.
5. Quality: we have QC on each process,provide high quality products.
Any problem or needed please feel free let us know, we are glad to service for you
We are factory, we can provide competitive price. And all the products will be shipped after quality inspection. Usually we quote within 24 hours after we get your inquiry.
7. FAQ
A1:We are factory with more than 10 years experience in this field.
A2: all products will be 100% inspected before shipment.
A3: Usually we will quote within 24 hours after receiving your inquiry.
A4: Credit Card, West Union, Paypal or T/T.
A5: if you can’t buy our product in your local area, we can send a sample to you. Sample will be charged by retail price, and plus all related shipping costs. Express delivery charge depends on the quantity of the samples.
