1. Measuring: 1 main circuit + 42 branch circuits
2. DI/DO: 4 status inputs (dry contact) , 2 relay outputs, 1 pulse output 

3. Settable Pre-Alarm function:
    Main circuit: Alarm for voltage, current, current unbalance (optional alarm for leakage current/ temperature alarm)
    Branch circuit: Alarm for current  (lo-lo-limit, lo-limit, hi-limit, hi-hi-limit)
4. Communication: RS485, support Modbus-RTU protocol
5. Phase sequence of branch circuit is programmable
6. Optional CT input for branch circuit: 50A, 100A, 200A
7. Settable wiring for branch circuit: Either single phase or 3 phase
8. Historical kWh record: kWh yearly consumption of last 10 years,
                                       kWh monthly consumption of last 12 months