Verifying the warning and alarm time limit of individual harmonic distortions
IHD,
WrnLimit#HD and tDelayAlm#HD (where # = 2
nd
, 3
rd
…5
th
)
GUID-17EC5D60-A748-46F4-8F13-A77E9CA3D17D v2
1.
Supply the IED with voltage at rated value.
2.
Apply 2
nd
order harmonic along with injected voltage signal.
3.
Slowly increase the harmonic amplitude until the 2NDHDWRN signal appears.
4.
Compare the harmonic amplitude level value with the set warning limit value.
5.
Continue to inject the same level of harmonics level until the 2NDHDALM signal appears
and note down the time from 2NDHDWRN signal set to 2NDHDALM signal set.
6.
Compare the noted time value with the set time limit value of alarm.
7.
Repeat Steps to for the harmonics until 5
th
order.
9.8.6.2
Completing the test
GUID-EDB51B29-9556-4EF4-94E6-5DC6B8C0F13A v1
Continue to test another function or end the test by changing the
TestMode setting to Off.
Restore connections and settings to their original values, if they were changed for testing
purposes.
9.9
Metering
SEMOD53588-1 v1
9.9.1
Pulse-counter logic PCFCNT
M13405-2 v7
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 = On or Operation = Off and the
function blocked or unblocked. The pulse counter value is then checked in PCM600 or on the
local HMI.
9.9.2
Function for energy calculation and demand handling
ETPMMTR
GUID-4FC03017-93BD-4B30-A874-487BF89971D5 v1
Prepare the IED for verification of settings as outlined in section ”Overview “ and
section ”Preparing for test“ in this chapter.
9.9.2.1
Verifying the settings
GUID-F8F0D384-BC70-48CA-817E-EB9BFBD68A54 v3
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.
1MRK 505 385-UEN C
Section 9
Testing functionality by secondary injection
Breaker protection REQ650
97
Commissioning manual
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