4.6
Verifying analog primary and secondary
measurement
Verify that the connections are correct and that measuring and scaling is correctly.
This is done by injecting current and voltage to the IED.
Apply input signals as needed according to the actual hardware and
the application configuration made in PCM600.
Procedure
1.
Inject a symmetrical three-phase voltage and current at rated value.
2.
Compare the injected value with the measured values.
The voltage and current phasor menu in LHMI is located under
Main menu/
Measurements
.
3.
Compare the frequency reading with the set frequency and the direction of the
power.
The frequency and active power are located under
Main menu/Tests/
Function status/Monitoring/PWRMMXU()PQf:1/Outputs
. Then navigate
to the bottom of the list to find the frequency.
4.
Inject an unsymmetrical three phase voltage and current, to verify that phases
are correctly connected.
If some setting deviates check the analog input settings under
Main menu/Configuration/Analog inputs
Measured values such as current (phase and residual)and voltages (phase-to-earth,
phase-to-phase and residual)as well as active, reactive and apparent power, power
factor phase angles as well as positive and negative sequence currents and voltages
are available in LHMI under
Main menu/Monitoring/I/O status/Monitoring
.
Navigate to the measurement function that contains the quantity to be checked.
Table 2:
CMMXU
I
A
; I
B
and I
C
amplitude range and angle
RESCMMXU
I
0
amplitude range and angle
CSMSQI
I1 and I2
amplitude range and angle
VPHMMXU
U
A
; U
B
and U
C
i.e. phase-to-
neutral
amplitude range and angle
VPPMMXU
U
AB
; U
BC
and U
CA
i.e. phase-to-
phase
amplitude range and angle
Table continues on next page
1MRS756801 A
Section 4
Testing IED operation
630 series
27
Commissioning Manual
