Siemens 3RB22 Equipment Manual page 28

Standards
1.2 Voltages
18
The specifications for 3-phase line supply according to IEC 60947-4-1
apply to the following line system configurations:
Ue voltage Line system configurations
specification
Three-phase four-
in the
wire systems
Equipment
Manual
[V] [V]
230 --
400 230 / 400
440 260 / 440
500 --
690 400 / 690
1000 --
-- not specified
Three-phase three-wire systems
[V]
230
400
440
500
690
1000 (3RB2956 and 3RB2966)
3ZX1012-0RB22-1AA1