k1 Settable time multiplier of the function for step 1
U Measured voltage
U1< Set start voltage for step 1
For example, if the measured voltage jumps from the rated value to 0.8 times the
set start voltage level and time multiplier k1 is set to 0.05 s (default value), then
the TR1 and TRIP signals operate at a time equal to 0.250 s ± tolerance.
10. The test above can be repeated to check the inverse time characteristic at
different voltage levels.
11. Repeat the above-described steps for step
2.
Extended testing
1. The tests above can be repeated for 2 out of 3 and for 3 out of 3 operation mode.
6.6.1.2 Completing the test
Continue to test another function or end the testing by setting the parameter TestMode
to Off under Main menu/Tests/IED test mode/TESTMODE:1. If another function
is tested, then set the parameter Blocked to No under Main menu/Tests/Function test
modes/Voltage/UV2PTUV(27,2U<)/UV2PTUV:1 for the function, or for each
individual function in a chain, to be tested next. Remember to set the parameter
Blocked to Yes, for each individual function that has been tested.
6.6.2 Two step overvoltage protection OV2PTOV
Prepare the IED for verification of settings as outlined in
5.1 "Preparing the IED to
verify settings".
Values of the logical signals for OV2PTOV are available on the local HMI under
Main menu/Tests/Function status/Voltage/OV2PTOV(59,2U>)/OV2PTOV:1.
The Signal Monitoring in PCM600 shows the same signals that are available on the
local HMI.
6.6.2.1 Verification of single-phase voltage and time delay to operate for Step
1
1. Apply single-phase voltage below the set value U1>.
2. Slowly increase the voltage until the ST1 signal appears.
3. Note the operate value and compare it with the set value.
The operate value in secondary volts is calculated according to
the following equations:
Section 6 1MRK 502 049-UEN A
Testing functionality
82
Commissioning manual
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