15.9.1.5 Over/Undervoltage feature
Procedure
1. Connect the test set for injection three-phase voltages to the appropriate
voltage terminals of the IED.
2. Inject voltage(s) in a way that relevant measured (according to setting
parameter VoltageInput) voltages are created from the test set.
3. Overall check in principal as above (non-directional overcurrent feature) and
correspondingly for the undervoltage feature.
15.9.1.6 Completing the test
Continue to test another function or end the test by changing the Test mode setting
to Off. Restore connections and settings to their original values, if they were
changed for testing purposes.
15.9.2 Rotor earth fault protection with RXTTE4 and general
current and voltage protection CVGAPC
Prepare the IED for verification of settings as outlined in section "Overview" and
section "Preparing for test" in this chapter.
15.9.2.1 Testing
The protection function uses injection of an ac voltage to the generator field circuit.
The COMBIFLEX voltage injection unit RXTTE4, Part No 1MRK 002 108-AB
contains a voltage transformer with a primary winding for connection to 120 or 230
V, 50 or 60 Hz supply voltage. From the secondary winding of this internal voltage
transformer approximately 40 V AC is injected via series capacitors and resistors
into the rotor circuit. The injected voltage is fed to a voltage input of the REG670
IED. The current caused by the injection is fed to a current input of the REG670
IED via a current transformer, which is amplifying the current ten times, as shown
in figure
101.
1MRK 502 029-UEN A Section 15
Verifying settings by secondary injection
207
Installation and commissioning manual
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