Areva MiCOM P921 - Page 111

Technical Guide P92x/EN FT/E11
User Guide
MiCOM P921-P922-P923 Page 33/110
8.3 Specific measurements for the MiCOM P922-MiCOM P923
In this menu, all the derived quantities are displayed : positive and negative sequence
voltages, peak and rolling demands.
8.3.1 Maximum and average values
The maximum and average values are calculated over a defined period of time : this
time period for the calculation of the average values is defined in the “RECORDS”
menu, “TIME PEAK VALUE” (see § 12.4).
These values are updated each 1s : a new calculation will be done as soon as the
user has reseted those values through the HMI (see the menu below), or through the
local or remote communication.
8.3.2 HMI description
V1 =
0.00 V
Description : Magnitude of the calculated positive sequence
voltage V1
V2 =
0.00 V
Description : Magnitude of the calculated negative sequence
voltage V2
MAX & AVERAGE V
RST = [C]
Description : reset of the voltages average and maximum
values (measured and derived quantities).
MAX. VA Rms =
0.00 V
Description : maximum value of the phase A voltage.
Note : this message only seen if "3Vpn" or "3Vpn+Vr"
connection.
MAX. VB Rms =
0.00 V
Description : maximum value of the phase B voltage.
Note : this message only seen if "3Vpn" or "3Vpn+Vr"
connection.
MAX. VC Rms =
0.00 V
Description : maximum value of the phase C voltage.
Note : this message only seen if "3Vpn" or "3Vpn+Vr"
connection.
MAX. VAB Rms =
0.00 V
Description : maximum value of the line Vab voltage.
Note : this message only seen if "3Vpp+Vr" or "2Vpp+Vr"
connection.
MAX. VBC Rms =
0.00 V
Description : maximum value of the line Vbc voltage.
Note : this message only seen if "3Vpp+Vr" or "2Vpp+Vr"
connection.
MAX. VCA Rms =
0.00 V
Description : maximum value of the line Vca voltage.
Note : this message only seen if "3Vpp+Vr" connection.
AVERAGE VA Rms =
0.00 V
Description : average value of the phase A voltage.
Note : this message only seen if "3Vpn" or "3Vpn+Vr"
connection.