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2.4 Normal usage conditions:
– ambient air temperature (23±2) °С;
– ambient air relative humidity (30-80) %;
– atmospheric pressure from 70 to 106.7 kPa (537...800 mm Hg).
– network frequency (50±0.5) Hz;
– the shape of the voltage curve of the measuring network is sinusoidal with a nonsinusoidal factor according to
GOST EN50160:2010*.
2.5 Operating usage conditions
The meter is connected to a three-phase AC network and installed indoors (or in cabinets with environmental
protection) with operating usage conditions:
– temperature range minus 40 to plus 70 °С
– ambient air relative humidity (30-98) %;
– atmospheric pressure from 70 to 106.7 kPa (537-800 mm Hg).
– network frequency (50 ± 2.5) Hz;
– the shape of the voltage curve of the measuring network is sinusoidal with a nonsinusoidal factor according to
EN50160:2010*.
*ATTENTION! WHEN OPERATING METERS IN CONJUNCTION WITH A POWERFUL NON-LINEAR LOAD
WHICH CAN DEGRADE THE POWER QUALITY (FOR EXAMPLE, AN ELECTRIC DRIVE WITH A FREQUENCY
CONVERTER), YOU SHOULD USE SPECIAL FILTERING DEVICES.
OTHERWISE, THE METER MAY OVERHEAT AND FAIL. FAILURE OF THE METERS DUE TO POOR POWER
QUALITY IS NOT A WARRANTY CASE. THE MANUFACTURER IS NOT RESPONSIBLE FOR DAMAGE TO THE
CONSUMER’S PROPERTY RESULTING FROM VIOLATION OF THE OPERATING CONDITIONS OF THE METERS
DESCRIBED IN THIS OPERATION MANUAL, INCLUDING DUE TO A POOR POWER QUALITY.
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