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Single-phase smart meter withcellular communications

Liberty 120 is a single-phase, single-element smart meter that provides flexibility through a modular design to accommodate the latest cellular communications technologies. Liberty 120 paves the way for reliable data transfer, making it the ideal solution for smart metering applications. The meter supports firmware upgrade, allowing metering and communications features, functionality to be updated in the field. Liberty 120 meters are 'fit for purpose' for all contestable and embedded metering installations. This enhances flexibility and makes the investment future-proof. The meters can be used for individual domestic or small commercial applications as well as for co-located metering installations in master-child configuration, offering value for money with reduced Capex and inventory. The Liberty 120 smart meter forms part of the Secure's liberty online smart metering solution. Refer liberty online brochure for system details.


  • Domestic and small commercial premises
  • Embedded networks and co-located installations (optional)
  • Credit and PAYG applications
  • Advanced metering infrastructure (AMI)
  • Suitable for co-generation metering applications


  • Value for investment with common infrastructure for contestable and embedded solutions.
  • Better information on usage to manage energy consumption
  • Improve billing cycle and accuracy through remote reading
  • Facilitates supply connection/disconnection remotely•Optimised telecommunication and data services for embedded networks
  • Fail-safe installation and commissioning process – reduced site opex and time
  • Power outage management – quick response time
  • Remote re-configurations
  • Reduced cost of ownership
    • Removes cost of manual read
    • Designed to serve long life in field


  • Meets the minimum services specification as per Australian National Electricity Rules (NER)
  • Multi-operator (roaming) SIM support – ensures maximum network coverage
  • Credit and Pay As You Go (PAYG) mode, remotely switchable (optional)
  • Peak and off-peak tariff management
  • Remote de-energisation and energisation
  • Alerts to identify potential anomalies
  • Consumer friendly displays
  • Quality of supply (QoS) monitoring
  • Modular communication
  • Remote firmware upgrade


Connection type 1-phase, 2-wire, active-neutral, direct connected
Measuring elements 1 element
Rated voltage 230V , -20% to +15%
Maximum voltage 460V (L-N) continuous
Impulse withstand 12 kV, 9 J, as per NMI M6
Current range 10-100A
Frequency 50 Hz ±5%
Accuracy Class 1.0 (active energy), class 2.0 (reactive energy)
Metrology lamp Two metrological LEDs for active and reactive energy
Standards NMI M6-1, AS 62052.11, AS 62053.21, AS 62053.23
Exceeds minimum services specification as per the National Electricity
Amendment (expanding competition in metering and related services. Rule 2015 No. 12)
Data storage capacity
Energy/demand load profile 395 days (per channel) at 30-minute interval (configurable), up to 4 channels, 65 days (per channel) at 5-minute interval (configurable), up to 4 channels
Quality of supply (QoS) parameters 90 days (per parameter) at 30-minute interval (configurable), up to 8 parameters, including average voltage, current, phase angle, temperature
Mains supply contactor 100 A
Dimensions (W x H x D) 146 mm x 211 mm x 65 mm
Enclosure material Flame-retardant polycarbonate
Weight 0.9 kg (approx.)
Sealing provisions Terminal cover, meter main cover, communications module
Display 10-character alphanumeric starburst display with backlight and icons for status
Keypad 12-key (0-9, A, B) for local entry of PAYG code and access to displays
For more details click here.