Electronic resettable self-powered switches Fkn12
l FKN12 series high voltage out door circuit breaker can be used for 50HZ 40. 5kv outdoor high voltage electrical equipment.
l Attached spring operating structure and electromagnet operating structure can manipulate electric opening and closing in a distance, or accumulate energy for manual operation.
l The design performance strictly sticks to our national standard GB1984-89 for high voltage alternating current vacuum circuit breaker, and meet the requirements of International Electro technical Commission (IEC) IEC-56 for high voltage alternating current vacuum circuit breaker.
l Mainly used in controlling and protection of outdoor power transmission and transformation system of 35kv, also in normal operation and short-circuit protection for all kinds of power grid and frequent operation place.
l Highest system voltages Um related to the rated voltages are defined in IEC 60071-1.
l These series of VCBs are ceramic pillar type.
l Vacuum interrupter is installed in upper part of ceramic insulator.
l It has characteristics of well tightness and high temperature endurance, non-combustion and non-exploration, easy mounting, anti-aging and long service life.
Ambient condition
1. Altitude: up to 2500m
2. Ambient temperature: max +50°C min -35°C
3. Maximum daily average temperature °C 40
4. Wind pressure: ≤700Pa (equals to wind speed 37.5m/s)
5. Earthquake intensity: ≤8 degree (as per terms UBN-97: Zone 1)
6. Air contamination degree: degree
7. Max daily temperature variation: ≤25°C
8. Maximum solar radiation: ≤1035 W/m²
9. Isokeraunic level: ≤70
10. Average rainfall annually: ≤1400 mm/a
Mechanical Data
Main Technical Data |
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Rated voltage | kv | 27.5 | ||
Rated frequency | Hz | 50 | ||
Rated lighting impulse withstand voltage | kv | 185 | ||
Rated short-time power frequency withstand voltage(dry) | kv | 95 | ||
Rated short-time power frequency withstand voltage(humid) | kv | 80 | ||
Rated current | A | 1250 | 1600 | 2000 |
Rated short-circuit breaking current | kA | 20 | 25 | 31.5 |
Rated short-circuit making current | kA | 50 | 63 | 80 |
Rated short-time withstand current | kA | 20 | 25 | 31.5 |
Rated peak withstand current | kA | 50 | 63 | 80 |
Rated operations of short-circuit breaking current interruption | times | 20 | ||
Full opening time | s | 0.1 | ||
Rated operating sequence |
| 0-0.3s-CO-180s -CO | ||
Rated duration of short-circuit | s | 4 | ||
Rated single capacitor bank breaking current | A | 400 | ||
Contact erosion limit | mm | 3 | ||
Mechanical life | times | 20000 | ||
Weight | kg | 1100 | ||
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Comtact person:Willow Chen
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