· According to DIN EN 60255
• Detection of incorrect phase sequence
• No separately auxiliary voltage necessary
• Nominal voltage range 3 AC 380 ... 690 V
• Suitable for frequency converter (f 40 ... 80 Hz)
• Output: NC contact (open at incorrect phase sequence)
• Extended temperature range
• ROMi: potted module with stranded wire connection
suitable for mounting in terminal box
• Width ROMe: 35 mm (1.4 in)
Applications : To avoid wrong sense of rotation on 3-phase motors
5. Technical Data
Input (L1-L2-L3) (ROMi: stranded wire red-blue-grey)
Nominal voltage UN: 3 AC 380 ... 690 V
Voltage range: 0.85 ... 1.1 UN (3 AC 320 ... 760 V)
Nominal consumption: approx. 3 VA
Frequency range: 40 ... 80 Hz (main frequency);
suitable for frequency converter
Output (7-8) (ROMi: stranded wire yellow-green)
Contact: 1 NC contact
Reaction time: After connection of all 3 phases with
wrong phase sequence until NC
contact opens: approx. 100 ms
Thermal current Ith
ROMi: 2 A
ROMe: 5 A
Switching capacity ROMi
acc. AC 15: 1 A / AC 230 V IEC/EN 60 947-5-1
acc. DC 13: 1 A / DC 24 V IEC/EN 60 947-5-1
Switching capacity ROMe
acc. AC 15: 2 A / AC 230 V IEC/EN 60 947-5-1
acc. DC 13: 2 A / DC 24 V IEC/EN 60 947-5-1
Electrical life time: 1.5 x 105 switching cycles
Short circuit strength
max. fuse rating
ROMi: 2 A gL IEC/EN 60 947-5-1
ROMe: 4 A gL IEC/EN 60 947-5-1
Mechanical life time: ≥ 30 x 106 switching cycle