Operational Metering (OMS)

  • Interface capabilities to different types of meter
  • Support IEC 62056-21 and COSEM HDLC DLMS protocols (not just limited to electricity meters)
  • Support serial (RS-232, RS-485) and ethernet interfaces
  • Backwards compatibility with standard OMS and pulse meter outputs
  • Read both tariff and instant readings (e.g. MW, MVAR, MVA, volts, amps frequency, power factor)
  • Report on power quality
  • Provide protocol conversion (IEC61850, MODBUS, IEC60870-5-104)
  • Analogue outputs (± 10 mA, 4 – 20 mA)
  • Compliant with NG TS3.24.72, NGTS 3.24.100, NG TGN(E)094

Nebula Interfaces
  • Ethernet (NTP Timing, HTTP, TCP MODBUS, IEC61850, IEC60870-5-104)
  • RS232 (RTU MODBUS Master/Slave)
  • RS485/422 (Interface to Meters with IEC62056-21, DLMS)
  • Pulse Inputs
  • Analogue Outputs (±10mA. 4-20mA)
  • Frequency Inputs
  • Sync Pulse Timing
  • PSTN Modem Support

National Grid ESO reporting for small (>100MV) BM Participants
  • NGESO recommend IEC 104 Gateway solution for Small BM Participants BM Unit  reporting over a VPN connection using the IEC 60870-5 104 protocol.