TECHNICAL DESCRIPTION
REV6 /REV3 OI 248 (EN) 123
A5 Technical Description
A5.1 Technical Data: Circuit Breaker Type GL 310-GL 312
Type GL 310
F3/4031 P/VR
GL 311
F3/4031 P/VR
GL 312
F3/4031 P/VR
Rated voltage kV 100 123 145
Rated normal current A 3150 3150 3150
Rated frequency Hz 50 / 60* 50 / 60* 50 / 60*
Rated power-frequency withstand voltage
50 Hz, 1 min
- To ground kV 185 230 275
- Across open switching device kV 185 230 275
Rated lightning impulse withstand voltage
- To ground kV 450 550 650
- Across open switching device kV 450 550 650
Rated switching impulse withstand voltage
(Vn > 245 kV)
- To ground kV not applicable
- Across open switching device kV not applicable
Rated short-circuit breaking current
- R.m.s. value of the a.c. component
of current
kA 40 40 40
- Percentage of d.c. component % 45 45 45
Minimum opening time ms 26 26 26
First-pole-to-clear factor 1.3 / 1.5 1.3 / 1.5 1.3 / 1.5
Transient recovery voltage
- Peak value kV 171 211 249
- Rate of rise kV/µs 2.0 2.0 2.0
Short-line fault
- Surge impedance 450 450 450
- Peak factor 1.6 1.6 1.6
Rated short-circuit making current kA 104 104 104
Rated out-of-phase breaking current kA 10 10 10
Rated duration of short circuit s 3 3 3
Rated operating sequence O-0.3s-CO-3min-CO
or CO-15s-CO
Rated line-charging breaking current A 20 31.5 50
Rated cable-charging breaking current A 125 140 160
SF
6
weight per breaker -30°C / -40°C
(porcelain insulator)
kg 8.3 / 7.8 8.3 / 7.8 8.3 / 7.8
SF
6
weight per breaker -30°C / -40°C
(composite insulator)
kg 13.0 / 9.6 13.0 / 9.6 13.0 / 9.6
*60 Hz only for -30°C