3UG4511-1BQ20 SIEMENS ⍾ 3UG45111BQ20

Digitally adjustable monitoring relay phase failure, phase sequence, asymmetry, frequency, over- and under-voltage monitoring 3x 90-690 V AC, 15-70 Hz 2 changeover contacts screw t …

Analog adjustment monitoring relay phase failure, phase sequence, asymmetry and under-voltage monitoring 3x 160-690 V AC, 15-70 Hz 2 changeover contacts screw terminal

Monitoring relay phase failure, phase sequence and asymmetry monitoring 3x 160-690 V AC, 15-70 Hz 1 changeover contact screw terminal