ABB REG650 ANSI, Руководство по вводу в эксплуатацию

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set to 10% of rated generator current, then TR1 and TRIP signals operates at time
equal to 250 sec ± tolerance.
10. Repeat the above-described tests for the step 2 of the function excluding the
inverse time testing.
11. Finally check that start and trip information is stored in the event menu.
Example
If CT ratios CTprim/CTsec for all three phases are 1000 and IBase is set to 1000 A,
than the following secondary currents shall be applied.
IL1 Ampl = 1.1 A Angl = 15 deg
IL2 Ampl = 0.6 A Angl = 97 deg
IL3 Ampl = 1.3 A Angl = -135 deg
The service value output NSCURR indicating amplitude of negative sequence current
in primary amperes should be 962A approximative.
6.5.11 Voltage-restrained time overcurrent protection VRPVOC
Prepare the IED for verification of settings as outlined in 5.1 "Preparing the IED to
verify settings" .
Values of the logical signals for VRPVOC are available on the local HMI under Main
menu/Tests/Function status/Current/VRPVOC(51V,I>U<)/VRPVOC:1 . The
Signal Monitoring in PCM600 shows the same signals that are available on the local
HMI.
6.5.11.1 Verifying the settings
Built-in overcurrent feature (non-directional)
1. Go to Main menu/Test/Function test modes/Current protection and make
sure that VRPVOC to be tested is unblocked and other functions that might
disturb the evaluation of the test are blocked.
2. Connect the test set for injection of three-phase currents to the appropriate
current terminals of the IED.
3. Inject three-phase current(s). Increase the current(s) until the function operates
and check against the set operate value, for example when voltage is reduced to
50% of rated the overcurrent start shall be 50% of the current start value for rated
voltage.
4. Decrease the current slowly and check the reset value.
5. Connect a TRIP output contact to the timer.
6. Set the current to 200% of the operate value, switch on the current and check the
time delay.
1MRK 502 049-UEN A
Section 6
Testing functionality
79
Commissioning manual