Multi-Tariff DLMS/COSEM STS prepayment 20 digits STS encryption 35mm Din-rail installation Tamper detection and record CIU by PLC/RF/ Cable (optional) Slim-line and space-economy design Disconnect on overload and no credit Programmable load limit and low credit warning Infrared port/RS485/virtual token carrier (optional) Surge protection for lightening and other line surges     Split Configuration for Increased Revenue Protection The CIU (Customer Interface Unit) is optional. The MCU (Metering & Control Unit) and CIU is linked via Mbus 2 wires communication, galvanically-isolated PLC or RF wireless communication, the communication method is on request. The CIU is installed within consumer’s home, while MCU is installed in a meter cabinet away from consumers.  

Electrical parameters:
Voltage
Nominal voltage Un	230V
Limited voltage	70%~120%Un
Frequency
Nominal frequency fn	50-60Hz
tolerance	5%
Current
Basic current(Ib)	5A
Maximum current(Imax)	60A (100A optional)
Starting current(Ist)	0.4%Ib
Active energy constant	1000imp/kWh
Measurement Accuracy
Active energy to IEC62053-21	Class1.0
Burden
Voltage circuit	<2W  <8VA
Current circuit	<1VA
Temperature range
Operation meter	-25℃ to+70℃
Storage	-40℃ to+85℃
Insulation
Insulation level		4kV rms 1min
Voltage impulse withstand		8kV 1.2/50 μs
Insulation System Classification		Protective Class II
Electro Magnetic Compatibility
Electrostatic discharges
Contact discharge		8kV
Air discharge		16kV
Electromagnetic RF fields
27MHz to 500MHz typical		10V/m
100kHz to 1GHz typical		30V/m
Fast transient burst test		4kV
Mechanical requirements
Meter shell Protection Rate		IP54
Insulation System Classification		Protective Class II
Maximum cable size		8 mm