1 or 3 - Phase Power Network Meter; Harmonic up to 51st; Display: LCD colour Display with Backlight; Input: Voltage (3 x 57.7/ 100 V 3x 230/ 400 V or 3 x 110/ 190 V 3 x 400/ 690 V) Current (1A or 5A) - Onsite Programmable Output: 2x Relays RS485 Profinet.