Different states of the power system - traffic lights
Green: Power system is in normal secure state.
Yellow: Power system is in endangered state. The adequacy of the electricity is endangered (serious risk for electricity shortage) or the power system doesn't fulfill the security standards.
Red: Power system is in disturbed state. Manual load shedding has taken placehappened in order to maintainkeep the adequacy and security of the power system (electricity shortage) or there is a serious risk to a wide black out.
Black: An extremely serious disturbance or a wide black out in Finland.
Blue: The network is being restored after an extremely serious disturbance or a wide blackout.