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Product at a glance

Bulk energy measurement, modular multi comms options, wall mounted, long range, site configurable

The Apex 150 line is a series of next generation energy meters. They have been designed for power transfer points that require precise measurements and have revenue transactions. Flexible and modular communications ensure integration with existing AMR / AMI / SCADA systems and allow for upgrades to future SAS systems. Quadrant energy measurement allows for monitoring of generation, transmission, and bulk power transfer points.


  • Metering for availability-based tariffs (ABT) and open access systems
  • Energy transfer measurement and reconciliation
  • Power plants, feeder monitoring, grid substations, wind turbines
  • Online monitoring of energy exchange at various interface points
  • Energy accounting, automation and system integration


  • Minimal integration cost through multiple communication interfaces
  • Suitable for diverse applications through wide-range voltage, current and auxiliary supply inputs
  • Supported by industry standard DLMS and MODBUS meter reading protocols
  • Meter reading and display view during power outage
  • Field-replaceable hot-pluggable communication modules


  • 0.2S accuracy for active and reactive measurement
  • Wide-range dual auxiliary supply with options for AC / DC and self-power (VT powered)
  • Power quality features including THD, sag, swell, voltage unbalance and interruption recording
  • Dynamic error compensation for CT / VT
  • Transformer / Line loss adjustment (copper and iron losses)
  • Intuitive graphical display including vector diagram, waveforms and bar chart for consumption
  • Remote configuration of communication ports
  • Simultaneous DLMS and MODBUS over the ethernet port
  • Support of meter reading and display over field replaceable battery
  • Availability of RS232, RS485 and ethernet ports in a single product and capability of simultaneous communication through all these ports
  • Flexible time-of-day tariff, maximum demand support with automatic billing dates
  • Meter cover and terminal cover open detection
  • RS232 port compatible with meter-powered modem
  • Best suited for Interface Energy Meters with five minutes integration period (field configurable)


Connection type HV3/HV4
Measurement voltage range 57.7 V or 63.5 V (L-N) for HV4, 100 or 110 V (L-L) for HV3
Measurement current range Ib: 1A or 5A (configurable)*, Imax up to 10A (configurable)*
Frequency 50 Hz ±5%
Burden with auxiliary/self (VT) powered Current circuit: < 0.1 VA/phase @ 1A, < 0.5 VA/phase @ 5A
Voltage circuit in case of Aux power: < 0.1 VA/phase
Voltage circuit in case of internal/self power: < 6 VA/phase
Accuracy Class 0.2S
Maximum overload Voltage 1.5 times of nominal voltage continuously
2 times of nominal voltage for 0.5 second
Maximum overload current 1.5 times of Imax continuously
10 times Imax for 1 second
20 times Imax for 0.5 second
Standards* IS 14697
IS 15959 DLMS Indian companion standard, category B
Dimensions (W x H x D) 292mm x 201mm x 105mm (H x W x D)
Weight 2 kg (+/- 200 gm)
Ingress protection IP54
Operating temperature -10 °C to + 60 °C
Limit range of operation -25 °C to + 70 °C
Storage temperature -40 °C to + 80 °C
Temperature coefficient <0.1%/10 C