Energomonitor 3.3T1

Portable three-phase reference standard meter, comparator and power data logger in one instrument.




Field of application:

As a power data logger: measurement and logging of

  • Electrical power/energy parameters (RMS of current and voltage for both sine and distorted waveforms, phase angles, active, reactive, apparent power, PF etc.)
  • Basic power quality parameters (harmonic measurements, voltage and frequency deviation, unbalance indicators etc.)

As a reference meter:

  • on-site performance, accuracy and calibration tests of single- and three-phase electric energy meters (active or reactive energy); control of correct meter wiring (without breaking into the circuits)

As a CT/VT test comparator:

  • on-site performance, accuracy and calibration tests of current and voltage instrument transformers
  • Inspection of secondary circuits of instrument transformers (load power measurements), e.g. within automatic metering and billing systems
  • On-site performance, accuracy and calibration testing of instrument transducers of current, voltage, active and reactive power

As a reference peak voltmeter:

  • Amplitude and peak AC voltage measurements (up to 500 Hz) across one/three channels and one differential channel; accuracy testing and calibration of peak voltmeters

Basic specifications:

  • Voltage measurement range: 0.6...360 V
  • Nominal current: IN =0.1, 1, 0.5, 5, 10, 50, 100, 300, 500, 1000, 3000 А
  • Operating temperature: 20...50°C
  • Weight: 2 kg


  • Rechargeable Power Supply with Battery Charger + Power Adapter
  • Current Clamp Switch Module
  • Photoelectric Scanning Heads
  • Pulse Former (PF)
  • Current Transformer Calibration Switch CTCS
  • Transformer Burden Measuring Device (TMBD)
  • Current Transformer Block (for direct measurements of current)
  • Current clamps
  • Voltage Test leads
  • Package

Note! We offer various training programmes for users of Mars-Energo instruments and software.

Components and accessories:

Rechargeable Power Supply + Power Adapter
RPS is charged from mains (85…264V, 50 ± 5Hz) via 220/16V Power Adapter from the delivery package.
Pulse Former
Pulse Former (PF) is an auxiliary device for testing energy meters.
Photoelectric scanning heads
Photoelectric scanning heads of two types are available: SH-I and SH-E.
TMBD for transformer burden measurement
TMBD serves for measuring load power of the transformer under test...
Current clamps
Current clamps (AC current sensors) are used as scaling converters (current to voltage conversion) for contactless AC current measurements within ...