Short overvoltage protection STR class II
Short overvoltage and overcurrent protection
– Protects the other components in a line by absorbing short overvoltages such as inductive overvoltages of ferromagnetic ballasts.
– Used in class II installations.
– Operates in differential mode (Ph+N).
– Mounted downstream of the cutout.
Short overvoltage protection STR class I
– Protects the other components in a line by absorbing short overvoltages such as inductive overvoltages of ferromagnetic ballasts.
– Used in class I installations.
– Operates in differential mode (Ph+N) or common mode (Ph+E or N+E).
– Mounted downstream of the cutout.
Short overvoltage and overcurrent protection STIR class II
– Protects the other components in a line by absorbing short overvoltages such as inductive overvoltages of ferromagnetic ballasts as well as inrush overcurrents.
– Used in class II installations.
– Operates in differential mode and series mode (Ph+N).
– Mounted downstream of the cutout.
