ABB REG670 - Completing the Test; Rotor Earth Fault Protection with RXTTE4 and General Current and Voltage Protection CVGAPC; Testing

Steps to verify the logic:
1. Keep all the current and voltage in normal balanced condition.
2. Keeping the phase current at rated value, slowly reduce the voltage till it enters
into the respective zone mho characteristics and also below the set value of the
under voltage seal-in logic.
3. Before the trip time delay of the respective zone, reduce the current magnitude so
that the operating impedance moves out of the mho characteristics.
4. The under voltage seal-in should give a PICKUP and TRIP after the trip time
delay is set for the under voltage logic.
13.4.7.2 Completing the test
GUID-93110921-550A-441F-A36F-901488CC41BB v3
Continue to test another function or end the testing by setting the parameter TestMode
to Disabled under Main menu/Tests/IED test mode/1: TESTMODE. If another
function is tested, then set the parameter Blocked to No under Main menu/Tests/
Function test modes/Impedance/ZGVPDIS/1: ZGVPDIS 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.
13.4.8 Rotor earth fault protection with RXTTE4 and general current
and voltage protection CVGAPC
SEMOD158692-3 v2
Prepare the IED for verification of settings as outlined in section
"Requirements" and
section "Preparing for test" in this chapter.
13.4.8.1 Testing
SEMOD158692-13 v2
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
53.
1MRK 502 073-UUS A Section 13
Testing functionality by secondary injection
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062 185
Commissioning manual