Universal Substation Meters (USM)



USM-1 (Universal Substation Meter) Smart Meters are built to support substations and industrial energy consumers in fetching their energy-demand patterns. The advanced LCD display and remote-access feature of USM-1 make it an apt fit for substations and industries.


Technical Specifications

Measurement & Range
  • kWh, kvarh and kVAh digital metering in import and export directions
  • -10 to +60ºC operational temperature
  • Three phase power supply: 318V L-N or 550V L-L
Battery and Storage
  • EEPROM-storage (Minimum data retention of 20 years)
  • Internal Real-time Clock with Battery Backup
Power Factor
  • Voltage per phase
  • Current per phase
  • Total three-phase active power
  • Total three-phase reactive power
  • Total three-phase apparent power
Communication Capabilities
  • Optical Communication port complies with IEC62056-21 Mode E, 9600bps
  • RS485, 9600bps
  • Ethernet port
International Standards
  • IEC62052-11
  • IEC62053-22
  • IEC62053-23
Other Specifications
  • 8 multiple tariffs according to time of use
    • Up to 620 special days
    • 20 regular days (repeated every year e.g. national day)
    • 600 irregular days for 30 years (each year 20 days)
    • Utility Sealed battery door and reset switch.
    • Up to 10 seasons
    • Up to 10 weeks
    • Up to 31 days
    • Each day up to 10 Scripts