| Breaking Capacity: | High Voltage Circuit Breakers |
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| Operation: | Manual Type |
| Speed: | High-Speed Circuit Breaker |
| Customization: |
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Shipping Cost:
Estimated freight per unit. |
about shipping cost and estimated delivery time. |
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| Payment Method: |
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| Initial Payment Full Payment |
| Currency: | US$ |
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| Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
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Audited Supplier 
ZN12 series vacuum circuit breakers are indoor high-voltage switchgear device with rated voltages of 12kV, 24kV, and 40.5kV, and three-phase AC 50Hz. It is a domestic product developed by introducing German Siemens 3AF technology.
The operating mechanism of the circuit breaker is a spring energy storage type, which can be operated by AC or DC, or manually. The circuit breaker has simple structure, strong breaking capacity, long service life and complete operation functions. And there is no danger of explosion, and the maintenance is simple. It is suitable for the control or protection switch of power transmission and distribution systems such as power plants, substations and industrial and mining enterprises, especially suitable for breaking important loads and frequent operation places. The installation form of the circuit breaker in the switch cabinet can be either a fixed type or a handcart type.
This product complies with relevant standards such as GB1984, JB3855 and IEC62271-100 "High Voltage AC Circuit Breaker".
Environmental conditions
1. Altitude:≤1000 m; (Altitude of prototype can reach below 4000 meters)
2. Ambient temperature: highest +40°C, lowest -25°C;
3. Relative humidity: daily average not more than 95%, monthly average not more than 90%;
4. Earthquake intensity: less than 8;
5. Installation environment: no fire, explosion hazard, no corrosive gas and no violent vibration place.
6. Please contact the manufacturer if the usage environment exceeds the above.
| No. | Item | Unit | Data | |||||
| 1 | Rated voltage | KV | 12 | |||||
| 2 | Rated insulation level |
Short-time power frequency withstand voltage (1min) | KV | 42 | ||||
| Lightning impulse withstand voltage (peak) | KV | 75 | ||||||
| 3 | Rated frequency | Hz | 50 | |||||
| 4 | Rated current | A | 630 1250 | 1250 1600 2000 2500 3150 | 1250 1600 2000 2500 3150 4000 | |||
| 5 | Rated short-circuit breaking current (effective value) | KA | 20 | 25 | 31.5 | 40 | 50 | |
| 6 | Rated short-circuit withstand current | KA | 20 | 25 | 31.5 | 40 | 50 | |
| 7 | Rated short circuit duration | s | 4 | |||||
| 8 | Rated peak withstand current | KA | 50 | 63 | 80 | 100 | 125 | |
| 9 | Rated short-circuit making current | KA | 50 | 63 | 80 | 100 | 125 | |
| 10 | Rated short-circuit breaking times | times | 50 | 30 | 20 | |||
| 11 | Secondary circuit power frequency withstand voltage (1min) | V | 2000 | |||||
| 12 | Rated single capacitor bank breaking current | A | 630 | 800 | 800 | |||
| 13 | Rated back-to-back capacitor bank breaking current | A | 400 | |||||
Drawing
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ApplicationFAQ
Q: Could I have prices of your products?
A: Welcome. Please feel free to send us inquiry here. We will reply you within 24 hours.
Q: Can I get a sample before the bulk order?
A: Yes, we welcome sample order to test and check quality.Mixed samples are acceptable.
Q: Can we print our logo/ company name on products?
A: Yes, of course, we accept OEM, then need you to provide brand authorization to us
Q:Do you accept product customization?
A:Yes, of course, please provide specific drawings or parameters, we will quote you after evaluation
Q: What is the lead time?
A: The lead time depends on the quantities ordered, generally within 7-20 days after receiving the payment.
Q: What is your Trade Terms?
A: We accept EXW, FOB, CIF, FCA, etc.
Q: What is your payment method?
A: We accept T/T, Western Union, Paypal, irrevocable L/C at sight, etc
Q: Do you inspect the finished products?
A: Yes, each step of production and finished products will be came out inspection by QC department before shipping. And we will provide goods inspection reports for your reference before shipment
Q: How to solve the quality problems after sales?
A: Take photos of the quality problems and send to us for our checking and confirming, we will make a satisfied solution for you within 3 days.
Suppliers with verified business licenses
Audited Supplier 
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