Liberty 120
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 AMI applications.
The meter supports remote firmware upgrade, allowing metering and communications features and functionality to be updated in the field. This enhances flexibility, and makes the utility’s investment future-proof.
Liberty 120 is an integrated part of Secure’s Liberty Online advanced metering solution.
Application
- Domestic and small commercial premises
- Credit and PAYG applications
- Advanced metering infrastructure (AMI)
- Suitable for co-generation metering applications
Key Feature
- 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 between these modes)
- Peak and off-peak tariff management
- Remote de-energisation and energisation (direct and arm)
- Alerts to identify potential anomalies
- Consumer friendly displays
- QoS (Quality of Supply) monitoring
- Modular communications
Benefits
- Better information on usage to help manage energy consumption
- Improved billing cycle and accuracy
- Facilitates supply connection/disconnection remotely
- Power outage management – quick response time
- Remote reconfiguration
- Low cost of ownership
- Removes cost of manual read
- Designed to serve long life in field
- Remote firmware upgrade
Useful Links
- Specification
Electrical
Connection type
1-phase, 2-wire, active neutral, direct connected
Measuring elements
1 element
Rated voltage (Vnom)
230 V AC, -20% to +15%
Maximum voltage
300 V (L-N) continuous
Impulse withstand
12 kV, 9 J, as per NMI M6
Frequency
50 Hz ±5%
Current range
10 A Ib, 100 A Imax
Accuracy
Class 1.0 (Active Energy), Class 2.0 (Reactive Energy)
Metrology Lamp
Two configurable metrological LEDs for active and reactive energy
Compliance
Standards
AS 62052.11, AS 62052.21, AS 62053.21, AS 62053.23, NMI-M6
Exceeds minimum services specification, as per the National Electricity Amendment (expanding competition in metering and related services)
Data storage capacity
Energy/demand load profile
395 days (per channel) at 30-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 minimum, maximum and average voltage, current, phase angle, temperature
Switches
Mains supply contactor
100 A
Mechanical
Dimensions (W x H x D)
146 mm x 211 mm x 65 mm
Enclosure
Flame-retardant polycarbonate
Sealing
Terminal cover, meter main cover, configuration button, communications module
Weight
0.9 kg (approx.)
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
Communications
Local
ANSI optical port (AS 62056.21)
Remote
3G/4G WAN, build option for ZigBee® HAN
Multi-operator (roaming) SIM support
Hot-swappable field interchangeable module, sealable separately
Security
AES128 encryption, cover open detection
Outage notification
Last gasp power supply (build option)
Clock
Real-time clock type
Crystal or mains-synchronised
Power source
Mains supply
Backup
Lithium battery, 15-year life
Compliance
AS 62054.21
Environmental
Ingress protection
IP 53
Insulation class
Protective class II
Temperature
Operating: -10 °C to +60 °C
Storage: -25 °C to +70 °C
Humidity
95%, non-condensing