Ningbo Tianan (Group) Co.,Ltd.
| Payment Terms | T/T, L/C, D/A, D/P |
| Supply Ability | 10000 sets per year |
| Delivery Time | 45 days |
| Packaging Details | International Standard package |
| Rated Voltage | 10kv 11kv 12kv |
| Rated Current | 630A 1250A |
| Mechanical Life | 10000 times |
| Altitude | ≤1000m |
| Service condition | Outdoor |
| Rated Frequency | 50Hz |
| Brand Name | Tianan Electric |
| Model Number | ZW20A-12 |
| Place of Origin | Ningbo,China |
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Product Specification
| Payment Terms | T/T, L/C, D/A, D/P | Supply Ability | 10000 sets per year |
| Delivery Time | 45 days | Packaging Details | International Standard package |
| Rated Voltage | 10kv 11kv 12kv | Rated Current | 630A 1250A |
| Mechanical Life | 10000 times | Altitude | ≤1000m |
| Service condition | Outdoor | Rated Frequency | 50Hz |
| Brand Name | Tianan Electric | Model Number | ZW20A-12 |
| Place of Origin | Ningbo,China | ||
| High Light | high voltage vacuum circuit breaker ，hv circuit breaker | ||
Model meaning:
Z W 20 A - 12 / T - 0 0
Z: vacuum circuit breaker
W: Outdoors
20A: Design Number
12: Rated voltage (KV)
T: spring operating mechanism
0: Rated current (A)
0: Rated short-circuit breaking current (kA)
Environmental Conditions
1. Altitude: ≤1000m; if applied in special conditions, it is designed to 2000m to 4000m to meet the requirements of different altitudes.
2. Ambient temperature: -45℃~+40℃;
3. Wind speed≤35m/s;
4. It is placed in the places without violent vibration
Technical Parameters
| No. | Item | Unit | Value |
| 1 | Rated voltage | kV | 12 |
| 2 | Rated frequency | Hz | 50 |
| 3 | Rated current | A | 630 |
| 4 | Rated short-circuit breaking current | kA | 20 |
| 5 | Rated peak withstand current (peak) | kA | 50 |
| 6 | Rated short-time withstand current/endurance | kA/s | 20/4 |
| 7 | Rated short-circuit making current (peak) | kA | 50 |
| 8 | Rated operating sequence | O-0.3s-CO-180s-CO | |
| 9 | Mechanical endurance | Time | 10000 |
| 10 | Rated short circuit breaking current breaking times | Time | 30 |
| 11 | Rated cable-charging breaking current | A | 25 |
| 12 | Power frequency withstand voltage(1min): Dry test (wet) phase-to-phase, to earth/fracture(wet test) | kV | 42(34)/48(36) |
| 13 | Lightning impulse withstand voltage(peak) phase-to-phase, to earth/fracture | kV | 75/85 |
| 14 | 1min power frequency withstand voltage of secondary circuit | kV | 2 |
Company Details
Business Type:
Manufacturer,Exporter,Trading Company,Seller
Year Established:
1969
Total Annual:
250000000-300000000
Employee Number:
3000~3500
Ecer Certification：
Verified Supplier
Ningbo Tianan (Group) Co, Ltd is a famous leading influential enterprise of the power transmission equipment manufacturing in China.It was founded in 1969,currently under the group, we have 1 national-level R&D center, 2 provincial-level R&D center, 10 professional companies, 70 sales office... Ningbo Tianan (Group) Co, Ltd is a famous leading influential enterprise of the power transmission equipment manufacturing in China.It was founded in 1969,currently under the group, we have 1 national-level R&D center, 2 provincial-level R&D center, 10 professional companies, 70 sales office...
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