Feature summary

Parameter	EM6433H	EM6436H	EM6459H
Accuracy Class for Wh	Class 1 Class 0.5	Class 1 Class 0.5	—
Accuracy Class for VARh	2.0	2.0	—
Accuracy Class for VAh	± 1% ± 0.5	± 1% ± 0.5	—
Sampling rate per cycle	32	32	32
Current: Per-phase and 3 phase average Calculated neutral current	ü	ü	ü
Voltage: V L-N - per-phase and 3 phase average V L-L - per-phase and 3 phase average	—	ü	ü
Frequency	—	ü	ü
Power: Active power (kW) - Per-phase and total Apparent power (kVA) - Per-phase and total Reactive power (kVAR) - Per-phase and total NOTE: The meter can measure and display only one power parameter at a time based on the type of power programmed.	ü	ü	—
Energy: kWh, kVAh, kVARh (2 Quadrant) Delivered (Import / Forward) NOTE: The meter can measure and display only one energy parameter at a time based on the type of power programmed.	ü	ü	—
% unbalance: Maximum 3-phase for current	—	ü	ü
Meter On hours Load Run hours Power Interruptions	ü	ü	Meter On hours Power Interruptions
Phase angle Per-phase (between Voltage and Current)	—	ü	ü
Communication	RS-485 Modbus RTU	RS-485 Modbus RTU (selected references only)	RS-485 Modbus RTU (selected references only)
Old registers: Retrieval of last cleared values of energy and Run hours	ü	ü	—