Test Voltage Inputs - GE MiCOM P40 Agile Technical Manual

Chapter 20 - Commissioning Instructions
All devices leave the factory set for operation at a system frequency of 50 Hz. If operation at 60 Hz is required then
this must be set in the Frequency cell in the SYSTEM DATA column.
1. Apply current equal to the line current transformer secondary winding rating to each current transformer
input in turn.
2. Check its magnitude using a multi-meter or test set readout. The corresponding reading can then be
checked in the MEASUREMENTS 1 column.
3. Record the displayed value. The measured current values will either be in primary or secondary Amperes. If
the Local Values cell in the MEASURE'T SETUP column is set to Primary, the values displayed should be
equal to the applied current multiplied by the corresponding current transformer ratio (set in the CT AND VT
RATIOS column), as shown below. If the Local Values cell is set to Secondary, the value displayed should
be equal to the applied current.
Note:
If a PC connected to the IED using the rear communications port is being used to display the measured current, the process
will be similar. However, the setting of the Remote Values cell in the MEASURE'T SETUP column will determine whether the
displayed values are in primary or secondary Amperes.
The measurement accuracy of the IED is ±1%. However, an additional allowance must be made for the accuracy
of the test equipment being used.
Cell in MEASUREMENTS 1
IA magnitude
IB magnitude
IC magnitude
IN measured mag
ISEF magnitude
5.2.14

TEST VOLTAGE INPUTS

This test verifies that the voltage measurement inputs are configured correctly.
1. Apply rated voltage to each voltage transformer input in turn
2. Check its magnitude using a multimeter or test set readout. The corresponding reading can then be
checked in the MEASUREMENTS 1 column.
3. Record the value displayed. The measured voltage values will either be in primary or secondary Volts. If the
Local Values cell in the MEASURE'T SETUP column is set to Primary, the values displayed should be equal
to the applied voltage multiplied by the corresponding voltage transformer ratio (set in the CT AND VT
RATIOS column) as shown below. If the Local Values cell is set to Secondary, the value displayed should be
equal to the applied voltage.
Note:
If a PC connected to the IED using the rear communications port is being used to display the measured current, the process
will be similar. However, the setting of the Remote Values cell in the MEASURE'T SETUP column will determine whether the
displayed values are in primary or secondary Amperes.
Cell in MEASUREMENTS 1
VAN magnitude
VBN magnitude
VCN magnitude
448
Corresponding CT ratio
(in CT AND VT RATIOS column)
Phase CT Primary / Phase CT Sec'y
E/F CT Primary / E/F CT Secondary
SEF CT Primary / SEF CT Secondary
Corresponding VT ratio
(in CT AND VT RATIOS column)
Main VT Primary / Main VT Sec'y
P14D
P14D-TM-EN-8