474 Rockwell Automation Publication 1426-UM001J-EN-P - August 2019
Appendix H EN 50160 Conformance Tracking
Operation
This section describes how the power monitor measures EN 50160 conformance.
Power Frequency
The mean fundamental frequency is measured in each valid 10 second interval.
The following are the conforming ranges for these measurements in low- and
medium-voltage systems:
Synchronously Connected
• Range 1: 50 Hz ± 1% during 99.5% of a year
• Range 2: 50 Hz + 4% / - 6% during 100% of the time
Not Synchronously Connected
• Range 1: 50 Hz ± 2% during 95% of each week
• Range 2: 50 Hz ± 15% during 100% of the time
Supply Voltage Variations (low-voltage systems)
The mean rms supply voltage is measured in each valid 10 minute interval. The
following are the confirming ranges for these measurements in low-voltage
systems:
Synchronously Connected
• Range 1: within ± 10% of nominal during 95% of each week
• Range 2: within + 10% / - 15% of nominal during 100% of the time
Not Synchronously Connected
• Within + 10% / - 15% of nominal during 100% of the time
Supply Voltage Variations (medium-voltage systems)
The following are the conforming ranges for these measurements in medium-
voltage systems:
Synchronously Connected
• Range 1: within ± 10% of nominal during 99% of each week
• Range 2: within + 15% / - 15% of nominal during 100% of the time
Not Synchronously Connected
• Within + 10% / - 15% of nominal during 100% of the time
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