76 Connect Devices WAGO-I/O-SYSTEM 750750-494 3-Phase Power Measurement ModuleManualVersion 1.2.0Pos : 92 /All e Seri en (Allgemei ne Module)/Ü berschriften/Ebene 2/Leistungs mess ung - Ü berschrift 2 @ 13\mod_1346327054898_21.doc x @ 102149 @ 2 @ 17.4 Power MeasurementPos : 93 /Serie 750 ( WAGO-I/O-SYST EM)/Ans chli eßen/Anschl uss beispi ele/Anal ogei ngangs kl emmen/Leistungs mess ung 750-0494 @ 16\mod_1372770633216_21.doc x @ 125347 @ 33 @ 17.4.1 Power Measurement on a MachineFor measuring power, all of the eight CAGE CLAMPS ® have to be connectedaccording to the figure below.Do not confuse current and voltage clamps!When making the connections do not confuse the current and voltage paths, asconnecting the phase voltages directly to the low impedance current clamps IL1… IL3 shall destroy the I/O module!Figure 17: Power Measurement on a MachineNegative power values!If you measure negative power values, check the connection of the associatedcurrent transformer circuit in the proper direction.7.4.2 Power Measurement on Two Motors Regulated byFrequency ConvertersThe example here illustrates power measurement on two 3-phase motors regulatedby a frequency converter (ac power converter) used e. g. in a conveyor system.Each of these motors is monitored by a 3-phase power measurement module.
