M50S-01 Three Phase (DC) Modular Smart Meter M52S-01 Three Phase (CT) Modular Smart Meter M50S-11 Three Phase (DC) Modular Smart Meter M52S-11 Three Phase (CT) Modular Smart Meter AISTAN M56Z 3 Phase Ultra Smart, Modular Energy Meter (DC Type) AISTAN M57Z 3 Phase Ultra Smart, Modular Energy Meter (CT, CT/VT Type)