Reference standard

IEC/IEEE

Voltage

72.5 kV

Withstand voltage

- Short-duration power-frequency, phase-to-earth / across isolating distance

140/160 kV

- Lightning impulse (BIL), phase-to-earth / across isolating distance

325/375 kVp

Frequency

50/60 Hz

Continuous current

2000/2500/3150A

Short-time withstand current

31.5/40 kA

Peak withstand current

80/100 kAp 

Duration of short-circuit

3s

Installation

Indoor/Outdoor

Ambient temperature range

down to -30 / up to +40 °C

Circuit-breaker rating

First-pole-to-clear factor

1.5

Short-circuit breaking current

31.5/40 kA

Short-circuit making current

80/100 kAp

Operating sequence

O-0.3s-CO-3 min-CO

Drive type (three-phase or single-phase)

Spring-operated mechanism

Breaking time

50 ms

Closing time

70 ms

Mechanical endurance

M2 class

Capacitive switching

C2 class

Disconnector and low-speed earthing switch rating

Capacitive current switching

0.1 A

Bus-transfer current switching capability

1600A / 10V

Mechanical endurance

M2 class

Make-proof earthing switch rating

Making current capability

80/100 kAp

Switching capability - electromagnetic coupling

80 A / 2 kV

Switching capability - electrostatic coupling

2 A / 6 kV

Mechanical endurance

M1 class