GE GL 311 F3/4031 P/VE - A5 Technical Description; A5.1 Technical Data: Circuit Breaker

TECHNICAL DESCRIPTION
REV7 /REV1 OI 250 (EN) 131 / 146
A5 Technical Description
A5.1 Technical Data: Circuit Breaker
Type GL 311
F3/4031 P/VE
GL 312
F3/4031 P/VE
Rated voltage kV 123 145
Rated normal current A 3150 3150
Rated frequency Hz
50 / 60* 50 / 60*
Rated power-frequency withstand voltage
50 Hz, 1 min
- To ground kV 230 275
- Across open switching device kV 230 275
Rated lightning impulse withstand voltage
- To ground kV 550 650
- Across open switching device kV 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
- Percentage of d.c. component % 45 45
Minimum opening time ms 26 26
First-pole-to-clear factor 1.3 / 1.5 1.3 / 1.5
Transient recovery voltage
- Peak value kV 211 249
- Rate of rise kV/µs 2.0 2.0
Short-line fault
- Surge impedance

450 450
- Peak factor 1.6 1.6
Rated short-circuit making current kA 104 104
Rated out-of-phase breaking current kA 10 10
Rated duration of short circuit s 3 3
Rated operating sequence O-0.3s-CO-3min-CO
or CO-15s-CO
Rated line-charging breaking current A 31.5 50
Rated cable-charging breaking current A 140 160
SF
6
weight per breaker -30°C / -40°C
(Porcelain Insulator)
kg 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
*60 Hz only for -30°C