Areva MiCOM P921 - Page 98

P92x/EN FT/E11 Technical Guide
User Guide
Page 20/110 MiCOM P921-P922-P923
7.1.2 HMI description
To gain access to the “GENERAL” menu from the default display, press
once,
once and once.
This sub-menu is common to the MiCOM P921, P922 and P923 relays :
GENERAL
Heading of the “GENERAL” sub-menu
CONNECTION
3 Vpn
Description : Mode of connection for the VTs:
Range : 3Vpn = 3 Phase-Neutral VTs connection
3Vpp+Vr = 3 Phase-Phase VTs + Residual VT
connection
2Vpp+Vr = 2 Phase-Phase VTs + Residual VT
connection
3Vpn+Vr = 3 Phase-Neutral VTs + Residual VT
connection
PROTECTION
PROT P-P
Description : selection of the voltage protection type
Range : PROT P-P / PROT P-N
Note : this message only seen if "3Vpn" or "3Vpn+Vr"
connection selected
DEFAULT DISPLAY
Rms VA
Description : definition of the default display.
Range : VA/VB/VC/V0 if "3Vpn" or
"3Vpn+Vr"connection
Vab/Vbc/Vca/V0 if "3Vpp+Vr" connection
Vab/Vbc/V0 if "2Vpp+Vr" connection
Note : in the MiCOM P922 and P923, frequency, V1 and V2
can also be selected
Please refer to chapter 2 of this Technical Guide for the complete description of the
connection schemes.
7.2 "VT RATIO" sub-menu
To gain access to the “VT RATIO” menu from the default display, press
once,
once, once and once.
This menu is common to the MiCOM P921, P922 and P923 relays. It makes it
possible to configure the VT ratios.
VT RATIO
Heading of the “VT RATIO” sub-menu
MAIN VT PRIMARY
20.00 kV
Description : Primary of the voltage transformer(s) feeding the
relay
Range : 0.1-100kV, step =0.01kV (for the “57-130V”
model)
220-480V, step=10V (for the “220-480V” model)
MAIN VT SEC’Y
100 V
Description : Secondary of the voltage transformer(s) feeding
the relay
Range : 57-130V, step=0,1V (for the “57-130V” model)
Note : no VT secondary voltage for the “220-480V” model