ZN12-12(40.5) is a 12kV/40.5kV indoor AC high voltage vacuum circuit breaker with vacuum arc extinguishing structure. Featuring reliable breaking performance, long service life and low maintenance, it is widely used in power plants, substations and industrial high-voltage distribution systems.
The ZN12-12(40.5) is a three-phase AC 50Hz indoor high-voltage vacuum circuit breaker, covering two voltage levels: 12kV and 40.5kV.
It adopts advanced vacuum arc-extinguishing technology, which has the advantages of strong breaking capacity, long electrical and mechanical life, and no environmental pollution.
It is mainly used for control and protection of power transmission and distribution equipment in power plants, substations, industrial and mining enterprises, and other places, and is especially suitable for occasions requiring frequent operation.
1. Altitudel: 1000m;
2. Ambient temperature: -25 ~+40 ;
3. Relative humidity: daily average 95 , monthly average 90 ;
4. Earthquake intensity: 8 degree;
5. Applicable occasions should free from inflammables, explosives, corrosives and severe vibration.
1. The breaking capacity of the arc extinguish chamber is high, the current carrying capacity is low, and the electrical life is long.
2. layout is from front to back, simple and compact structure, complete operation and easy maintenance.
3. In order to structure and installation, they can be divided into: Horizontal fixed type, inclined fixed type, middle set movable type.
|
Parameter Name
|
Specification (12kV)
|
Specification (40.5kV)
|
|---|---|---|
|
Rated Voltage
|
12kV
|
40.5kV
|
|
Rated Frequency
|
50Hz
|
50Hz
|
|
Rated Current
|
630A, 1250A, 1600A, 2000A
|
630A, 1250A, 1600A, 2000A
|
|
Rated Short-Circuit Breaking Current
|
20kA, 25kA, 31.5kA, 40kA
|
20kA, 25kA, 31.5kA, 40kA
|
|
1min Power Frequency Withstand Voltage
|
42kV
|
95kV
|
|
Lightning Impulse Withstand Voltage (Peak)
|
75kV
|
185kV
|
|
Operating Mechanism
|
Spring Energy Storage Type (AC/DC Dual-Use, Manual Optional)
|
Spring Energy Storage Type (AC/DC Dual-Use, Manual Optional)
|
|
Mechanical Life
|
≥10,000 Times
|
≥10,000 Times
|
| S/N | Item | Unit | Data | ||||
|---|---|---|---|---|---|---|---|
| 1 | Rated
voltage |
kV | 12 | ||||
| 2 | Rated insulation level | 1 min power
frequency withstand voltage |
42 | ||||
| Lightning
impulse withstand voltage |
75 | ||||||
| 3 | Rated frequency | Hz | 50 | ||||
| 4 | Rated current | A | 6301250
1600 |
12501600
2000 2500 3150 |
12501600
2000 2500 3150 |
20002500
3150 4000 |
|
| 5 | Rated short circuit breaking current | kA | 20/25 | 31.5 | 40 | 50 | |
| 6 | 4s short time withstand current | 20/25 | 31.5 | 40/3s | 50/3s | ||
| 7 | Rated short circuit making current (peak) | 50/63 | 80 | 100 | 125 | ||
| 8 | Rated peak withstand current (peak) | 50/63 | 80 | 100 | 125 | ||
| 9 | Breaking times of rated short circuit breaking current | times | 50 | 30 | |||
| 10 | Mechanical life | 10000 | 6000 | ||||
| 11 | Closing time | ms | ≤75 | ||||
| 12 | Opening time | ≤65 | |||||
| 13 | Phase center distance | mm | 210、230、250、275 | ||||
Manufacturer of power transmission and distribution equipments.
We will contact you within 1 working day, please pay attention to the email with the suffix “@wolunele.com”.
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