Power And Energy Measurements - Eaton PXR10 Manual

3 Protection and measurement functions

3.4 Power and energy measurements

3.4 Power and energy measurements
22
The following power and energy values can be measured.
Table 13: Power and energy measurements
1)
Measurement
Power measurement
Active power
Apparent power
Reactive power
Active power requirement
Apparent power requirement
Reactive power requirement
Active power requirement (peak)
Apparent power requirement (peak)
Reactive power demand (peak)
Power factor
Energy measurement
Active energy (forward)
Active energy (reverse)
Net active energy
Total active energy
Apparent energy
Reactive energy (forward)
Reactive energy (reverse)
Net reactive energy
Total reactive energy
1) Accuracy: Class 1 (derived from IEC61557-12)
The power and energy values are calculated and updated internally at a
frequency of 1 Hz.
PXR Electronic trip unit 01/21 MN012005EN www.eaton.com
Unit of Note
measure
kW Updated after approximately 1 second
kVA Updated after approximately 1 second
kvar Updated after approximately 1 second
kW Fixed window of 5 to 60 minutes
kVA Fixed window of 5 to 60 minutes
kvar Fixed window of 5 to 60 minutes
kW Value is held until reset
kVA Value is held until reset
kvar Value is held until reset
– Updated after approximately 1 second
kWh From the source to the load
kWh From the load to the source
kWh "Active energy (forward)" - "active energy (reverse)"
kWh "Active energy (forward)" + "active energy (reverse)"
kVAh
kvarh From the source to the load
kvarh From the load to the source
kvarh "Reactive energy (forward)" - "reactive energy (reverse)"
kvarh "Reactive energy (forward)" + "reactive energy (reverse)"