Energomonitor-3.1KM

Multifunctional Reference Standard

Accuracy class 0.02, 0.05

National Registry No 52854-13 (extended until 21.11.2027)

Calibration interval 1 year

The Standard of the first grade according to the State Calibration Scheme stated by Rosstandart for the instruments measuring electrical quantities, Order No 1436

Purpose

The Energomonitor-3.1KM reference meter is intended for accuracy testing, calibration and verification of reference standard meters, working standard meters and other instruments for electrical energy measurements, including:

Single/ three-phase active and reactive energy meters
Single/ three-phase wattmeters, varmeters and active/reactive power measuring transducers
Phase angle meters, frequency meters, voltmeters, ammeters, transducers measuring AC voltage and current within commercial range of frequencies and DC current and voltage measuring transducers
Power quality meters
Current and voltage instrument transformers (as a comparator)

Energomonitor-3.1KM can be used independently, together with a PC that provides extended functionality, or as part of a test system. Typical customers are industrial metrological labs and national centers of standardization, metrology and certification.

Foreign analogues

The closest analogue: RD-30 series of three-phase Electricity Energy Reference Standards produced by Radian (“Radian Research, Inc.”, the USA)

Accuracy specifications

Measured parameters	Measuring range	Intrinsic measurement error
Measured parameters	Measuring range	Accuracy class 0.02	Accuracy class 0.05
RMS voltage	0.1 to 960 V (U_nom=1,2,5,10,30,60,120,240,480,800 V)	±0.01%	±0.02%
RMS current	5 mA to 120 A (I_nom= 0.05, 0.1, 0.25, 0.5, 1, 2.5, 5, 10, 25, 50, 100 A)	±0.01%	±0.02%
RMS current	500 mA to 3600 A (I_nom = 10, 100, 1000, 300, 3000 A)	±0.2 ... 2.0% (depending on the type of current sensors)
Phase angle between fundamental harmonics of phase voltages	0° to 360°	Absolute ±0.01°
Phase angle between fundamental harmonics of current and voltage in the same phase	0° to 360°	Absolute ±0.01°
Active power	At 1.2∙I_nom and 1.2∙U_nom	Direct measurements
		±0.01%	±0.05%
		Measurements via current sensors
		±0.1 to 2.0%	±0.1 to 2.0%
Reactive power	At 1.2∙I_nom and 1.2∙U_nom	Direct measurements
		±0.03%	±0.1%
		Measurements via current sensors
		±0.2 to 2.0%	±0.2 to 2.0%
Power factor	-1.0 to +1.0	Absolute
Power factor	-1.0 to +1.0	±0.001
AC frequency	40 to 70 Hz	Absolute
AC frequency	40 to 70 Hz	±0.001 Hz	±0.003 Hz
Negative sequence and zero sequence voltage ratios	0 to 50 %	Absolute ±0.05
Total Harmonic Distortion of voltage (current) Voltage (current) harmonic of order n (in reference to fundamental KU(n) or KI(n)), where n = 2…50	0 to 49.9%	Absolute ±0.003% (K_U(n) or K_I(n) <1.0 %)
	0 to 49.9%	Relative ±0.3% (K_U(n) or K_I(n)≥ 1.0%)
Voltage (current) interharmonic of order m K_U(m) or K_I(m), where m=0.5…50.5	0 to 49.9%	Absolute ±0.006% (K_U(m) or K_I(m) <1.0 %)
	0 to 49.9%	Relative ±0.6% (K_U(m) or K_I(m) ≥ 1.0%)
Ratio error of instrument voltage and current transformers δ	0.2 to 20%	Absolute
	0.2 to 20%	±0.002%	±0.005%
Phase error of instrument voltage and current transformers Δ	0.1′ to 180º	±0.1′	±0.2′
Flicker short-term severity	0.25 to 10	Relative 5.0%(ΔU/U≤20%)