◆ Lightweight enclosures of aluminum with good conductivity, no eddy-current losses and a high resistance to corrosion
◆ Single-phase encapsulated design, assuring minimal dielectric and dynamic stresses
◆ The electromagnetic compatibility of the switchgear, both externally and internally, prevents interference voltages and over-voltages
◆ Increased personnel safety
◆ Horizontal circuit breaker design saving building elevation and cost, ensuring convenient personnel access
◆ On line condition monitoring and synchronized switching options
◆ Short erection times and high reliability, by providing large transport units assembled and tested in the factory

Rated voltage

550kV

Rated current

4000A /6000A（busbar）

Rated frequency

50 Hz

Rated short-time withstand current(3s)

63kA

Rated peak withstand current

171kA

Rated short-circuit breaking current

63kA

Rated making current

171kA

Rated power frequency withstand voltage(1 min.)

740kV

Rated switching impulse withstand voltage

1300kV

Rated lightning impulse withstand voltage

1675kV

Leakage rate/ year and gas compartment

≤0.5%

Operating sequence

O-0.3s-CO-180s-CO

Ambient temperature

-30…+40 ℃