ABB FSK II S + - Technical Data and Specifications; Electrical Data for FSK1025

16/36
6. Technical Data
6.1. Electrical Data Pole
6.1.1. Load break switch & Circuit breaker FSK1025
Designation Value
Type: 1250
Frequency 50 Hz -60Hz
Operating voltage 25 kV
Number of phase 1 or 2
Rated voltage
acc. To EN 50124-1
acc. To EN 60694
27.5 kV
27.5 kV
Rated power frequency withstand voltage
Phase to earth
Across open contacts
Electromagnet, electronics and wiring to earth
(50Hz / 1 min)
105 kV
105 kV
2 kV
Rated lightning impulse withstand voltage
Phase to earth
Across open contacts
(1.2/50 µs)
250 kV
250 kV
Rated currents
Normal current
Short-circuit breaking current
Rated peak withstand current
Short circuit making current
Short time withstand current (3 s)
1250 A
8/25 kA
50/63 kA
50/63 kA
25 kA
Rated operating sequence CB O – 0.3s – CO – 60s – CO
LBS CO
Closing time  65 ms
Opening time  45 ms
Strength of the circuit-breaker pole
- mechanical class M2=
- with maintenance
Operating cycles
10000
30000
Strength of the vacuum interrupter
Mechanical operating cycles
Electric power at rated current
Electric power at rated short-circuit break current
20000
20000
50