The purpose of signal lamp SO 330 sp is to inform by three LEDs on the state of the three-phase network.
Each phase is assigned to one of the corresponding LED designation (L1, L2, L3).
Signal lamp has an additional monostable button that allows you to check the status of a temporary three-phase
network (LEDs light up only when you press the button).
In the absence of phase the LED corresponding to the phase will not light up. At low voltage LED will light a little less
and goes off only when voltage almost completely disappears.
|