ABB RELION RET670, Commissioning Manual

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11.14 Metering
11.14.1 Pulse-counter logic PCFCNT
The test of the Pulse-counter logic function PCFCNT requires the Parameter Setting tool
in PCM600 or an appropriate connection to the local HMI with the necessary
functionality. A known number of pulses with different frequencies are connected to the
pulse counter input. The test should be performed with settings
Operation = Enable or
Operation = Disable and the function blocked or unblocked. The pulse counter value is
then checked in PCM600 or on the local HMI.
11.14.2 Function for energy calculation and demand handling
ETPMMTR
Prepare the IED for verification of settings as outlined in section ”Overview “ and
section ”Preparing for test“ in this chapter.
11.14.2.1 Verifying the settings
Common test equipment can be used to determine the injection of current and voltage and
time measurement.
Verification of EAFACC & ERFACC output
1. Connect the test set for injection of three-phase currents and three-phase voltage to
the appropriate current and voltage terminals of the IED.
2. Ensure the instantaneous values of active and reactive power from CVMMXN
function block are connected to ETPMMTR function block active and reactive power
inputs.
3. Enable the EnaAcc setting and set tEnergy as 1 minute.
4. Activate the
STARTACC
input and supply the IED with three-phase currents and
voltages at their rated value.
5. Check that the
ACCINPRG
signal appears continuously.
6. Note the
EAFACC
and
ERFACC
value after 1 minute and compare it with calculated
energy value.
7. Similarly check after each 1 minute whether the calculated integrated energy value
and
EAFACC
and
ERFACC
outputs are matching.
8. After some time (multiple of minute) remove the current and voltage input from
CVMMXN function block.
9. Check the
EAFACC
and
ERFACC
output in the next 1 minute cycle for the retaining
the same value.
1MRK 504 165-UUS -
Section 11
Testing functionality by secondary injection
Transformer protection RET670 2.2 ANSI 281
Commissioning manual