MA309 Smart Three Phase Meter

u  Plug-and-play with interchangeable module: PLC/RF/GPRS/3G.

u  Compliant with DLMS/COSEM. 

u  Energy efficiency with advanced measurement with TOU.        

u  Disconnect/Reconnect.    

u  Read without power.

u  Protect from fraud or tampering, alarm and events record.      

u  High security and reliability.     

u  Advanced design for operation costs reduction, friendly user interface.                                      

Main Features
Technical Specifications

Measurement and power quality

ü   Import and export active / reactive / apparent energy and demand; Configurable maximum demand integration period (typically 5, 10, 15, 30 or 60 minutes); Instantaneous voltage and current, PF, Vrms, Irms, Frequency 


ü   The meter supports up to 4 tariffs, 2 sets of tariff scheme; The passive tariff scheme can be configured by remote or local command 

Load profile for energy and power quality

ü   Up to 8 programmable channels for energy and demand load profile; Up to 8 programmable channels for power quality load profile; Programmable profiles period  ( typically 1, 5, 10, 15, 30, 60 minutes )

Real time clock

ü   IEC 62054-21 0.5s/day (@23); Remote and local synchronization available 

Communication interface

ü   Optical, 9600bps infrared; Plug-and-Play module: PLC/RF/GPRS/3G; RS-485 

Display and indicators

ü   Segment LCD, 8 digits, number of decimal configurable; Two LEDs indicate  active and reactive pulse; Three colors LED indicate different communication status; Support reading (LCD display) without power 

Connect / Disconnect

ü   Latch relay for power control.

Backup power supply

ü   Internal battery, support RTC at least 2 years without main power; External replaceable battery; Low battery alarm 6 months in advance of battery empty

Anti-tamper features

ü   Phase current reverse; Current unbalance (bypass); Phase voltage missing (current without voltage); Phase sequence error; Main cover removal; Terminal cover removal; Strong DC magnetic field; Meter dismantle/removal; Over temperature

Log file

ü   Up to 30 kinds of event record with timestamp: Power off and power on; Low battery; Relay connection / disconnection remotely and overload; Meter parameters programed; Tamper related events; Power quality events (over voltage, under voltage etc. ); Firmware upgrade event; Access records with both correct and incorrect password 

Advanced flexible platform design

ü   Flexible to support different communication channels: PLC(G3-PLC/PRIME)/RF/GPRS/3G; Replace communication module without turning off the meter ; Support DLMS / COSEM  

Industrial standard data security and authentication mechanism

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