MTS-ME21

Multipurpose Semi-Automatic Test System

The Test System is designed for accuracy testing (calibration, verification) of energy meters and instruments measuring electrical quantities.

Accuracy classes: 0.02, 0.05

Purpose

Depending on the modification, the Test System can be applied for accuracy testing (calibration, verification) of the following equipment:

	Single- and three-phase active and reactive energy meters of accuracy class 0.05 or less accurate with input ratings up to 120A and from 100 to 400 V
	LPIT-compatible electronic meters of accuracy class 0.5S (or less accurate)
	Single- and three-phase meters of accuracy class 0.05 with operating frequency range up to 450 Hz used to measure active, reactive, and apparent power/energy
	Voltmeters (up to 1000 V), ammeters and measuring converters (up to 450 Hz) with unified outputs
	Measuring instruments equipped with AC current probes up to 3000 A
	Instruments measuring power quality as applied to Russian Standard GOST R 8.655–2009
	Instruments measuring DC current, voltage, and power (accuracy class 0.05 or less accurate, 100 A, 600 V).

With use of the State Calibration Scheme, depending on the modification, the Test System can be certified as a 1^st grade or 2^nd grade reference standard for the instruments measuring:

	Electrical quantities in the frequency range from 1 to 2500 Hz as stated by Rossstandart, Order No 1436 of 23 July 2021
	AC current in the ranges from 1Е^-8 to 100 A and from 1Е^-1 to 1Е⁶ Hz as stated by Rosstandart, Order No 668 of 17 march 2022
	AC voltage in the ranges up to 1000 V and from 1Е^-1 to 2Е⁹ Hz as stated by Rosstandart, Order No 1705 of 18 August 2023
	DC current in the range from 1Е^-16 to 100 A as stated by Rosstandart, Order No 2091 of 1 October 2018.

The Test System can be applied to calibration of smart meters (additional parameters to be measured are selected by the customer)

Modifications

The Test System includes a waveform generator (Energoforma-3.1E) and a reference standard selected among:

	Energomonitor-3.1KM (52854-13)
	Energomonitor-3.1KM-E (86936-22)
	Energomonitor-61850 (73445-18)

The portable version of the Test System is intended for on-site testing (verification, calibration) of LPIT-compatible electronic meters of accuracy class 0.5S with integrated power quality measurement function (class S).

Error calculators VP-3.1 and scanning heads of SH series (if included in the scope of supply) provide for testing meters in the automatic mode.

The multifunctional meter suspension rack STB provides quick connection of tested meters to the test system.

An example of the Test System equipped with the meter suspension rack STB-10 (for testing 10 3-phase meters at a time):

To provide galvanic insulation when testing 5 or more meters with closed U-I links (including directly connected meters) the Test System can be equipped with isolating three-phase current transformers TTR-3.100.

To provide galvanic insulation when testing 3 or more single-phase meters of accuracy class 1.0 with closed U-I links the Test Bench can be equipped with isolating single-phase voltage transformers TNI-1.

To test measuring instruments equipped with AC current probes (split-core CTs) up to 3000 A, the Test System is supplied with calibrated coils of KT series (used to multiply test current).

To test measuring instruments with unified DC voltage or current outputs, the Test System is supplied with volt/mA calibrators Calmar-S (69182-17).

“ME-Service”

“ME-Service” is a HW/SW set expanding the functionality of the Test System by adding the function of generating test reports according to ISO/IEC 17025.

Foreign analogues

Closest analogue:
- Test systems for testing electricity meters produced by MTE (EMH Energie-Messtechnik GmbH, Germany)
- Test systems for testing electricity meters MTS by ZERA (ZERA GmbH, Германия)
- Electricity meter test system ELMA-8315 (Applied Precision Ltd., Slovakia)

Specifications

Mains supply

207 ... 253 V,
or 400 V
47.5 ... 52.5 Hz

AC power consumption

6000 VA, or less

Operating temperaturerange

From +18 to +28 °С (stationary)
From +10 to +35 °С (portable)

Parameters of the Source	Range	Setting increment
Frequency of first harmonic (f₁)	40 to 450 Hz	0.01
RMS of 1^st harmonic of phase voltage (U₁)	From 0.0001 to 12 V	0.0001
RMS of 1^st harmonic of phase voltage (U₁) generated using voltage amplifier VA-3.1	From 6 to 576 V	0.001
RMS of voltage produced by 1st harmonic of output current signal U_i1	From 0.0001 to 6 V	0.00001
RMS of 1^st harmonic of current (I₁) generated using current amplifier CA-3.1	From 0.002 to 120 A	0.0001
Harmonics of frequency k·f₁ (k = 2 …19) in steps of 1.0	0 to 100%	0.01
Harmonics of frequency k·f₁ (k = 20 … 50) in steps of 1.0	0 to 50%
Harmonics of frequency k·f₁ (k = 0.5 … 50.50) in steps of 1.0	0 to 15%
Phase shift between 1^st harmonics of voltage in different phases 1^st harmonic of voltage and 1st harmonic of current in the same phase 1^st and n^th harmonics of voltage in the same phase 1^st and n^th harmonics of current in the same phase	From –179.99 to +180.00 °	0.01
Duration of voltage dip or swell (t)	From 0.0001 to 12 s	0.0001
RMS value of voltage dip (U_min) in % от U₁	0 to 100%	0.01
RMS value of voltage swell (U_max) in % от U₁	100 to 200%	0.01

Software

Energoforma
Software for automatic control of test (verification or calibration) procedures when testing reference instruments (like Energomonitor) or similar measuring instruments

Enform-MTS
Software for automatic control of test (verification) procedures when testing electricity meters or various measuring converters with unified outputs using volt/mA calibrator/error calculator Calmar-S

EmCounter
Software intended for managing and documenting test results and for maintaining databases of tested devices

EfCalibr
Software used to adjust generator Energoforma-3.1E

Advantages

	Capable of testing smart meters
	Multi-position: up to 30 electricity meters can be tested at a time
	Both manual and automatic test procedures are supported
	With the software, it is possible to set test signals in the generator, read records from the internal memory, and configure automatic generation of test reports